/* ============================================================
   MOHAMMED ALRASHADI — CANONICAL GLOBAL DESIGN SYSTEM
   Editorial Engineering Studio & Personal Platform
   Phase 1: Global Design Tokens & Reusable Component System

   Design Principle:
   KEEP THE IDENTITY. REDUCE THE NOISE.
   SIMPLE AT THE SURFACE. DEEP UNDERNEATH.

   Themes: Dark (Default), Light, System Preference
   ============================================================ */

/* --- SHARED DIMENSIONAL FOUNDATION (THEME-AGNOSTIC) --- */
:root {
  /* Container Scale (Editorial Systems Modernism) */
  --container-reading: 680px;
  --container-study: 1280px;
  --container-catalog: 1920px;
  --container-canvas: 2560px;

  /* Spacing Scale — canonical named tokens */
  --space-xs: 0.25rem;   /* 4px */
  --space-sm: 0.5rem;    /* 8px */
  --space-md: 1rem;      /* 16px */
  --space-lg: 1.5rem;    /* 24px */
  --space-xl: 2.5rem;    /* 40px */
  --space-2xl: 4rem;     /* 64px */
  --gutter: 1.5rem;      /* 24px Desktop */
  --gutter-mobile: 1rem; /* 16px Mobile */

  /* Numeric spacing aliases (maps to Tailwind-style scale used in component CSS) */
  --space-1: 0.25rem;  /* 4px */
  --space-2: 0.5rem;   /* 8px */
  --space-3: 0.75rem;  /* 12px */
  --space-4: 1rem;     /* 16px */
  --space-5: 1.25rem;  /* 20px */
  --space-6: 1.5rem;   /* 24px */
  --space-7: 1.75rem;  /* 28px */
  --space-8: 2rem;     /* 32px */
  --space-9: 2.5rem;   /* 40px */
  --space-10: 3rem;    /* 48px */
  --space-12: 3.5rem;  /* 56px */
  --space-14: 4rem;    /* 64px */
  --space-16: 5rem;    /* 80px */

  /* Radius Scale */
  --radius-sm: 0.25rem;  /* 4px */
  --radius-md: 0.5rem;   /* 8px */
  --radius-lg: 0.75rem;  /* 12px */
  --radius-xl: 1rem;     /* 16px */
  --radius-full: 9999px;

  /* Typography Scale Tokens */
  --text-xs: 0.75rem;    /* 12px */
  --text-sm: 0.875rem;   /* 14px */
  --text-base: 1rem;     /* 16px */
  --text-body-sm: 0.875rem;
  --text-body-md: 1rem;
  --text-lg: 1.125rem;   /* 18px */
  --text-xl: 1.25rem;    /* 20px */
  --text-2xl: 1.5rem;    /* 24px */
  --text-3xl: 2rem;      /* 32px */
  --text-4xl: 2.5rem;    /* 40px */

  /* Font families */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --font-headline: 'Inter', system-ui, -apple-system, sans-serif;

  /* Motion Scale (Phase 4: Coherent Interaction) */
  --motion-instant: 100ms;
  --motion-micro: 150ms;
  --motion-standard: 250ms;
  --motion-emphasis: 400ms;
  
  --ease-standard: cubic-bezier(0.4, 0.0, 0.2, 1);
  --ease-emphasized: cubic-bezier(0.2, 0.0, 0, 1);
  --ease-decelerate: cubic-bezier(0.0, 0.0, 0.2, 1);
  --ease-accelerate: cubic-bezier(0.4, 0.0, 1, 1);
}

/* ============================================================
   1. LIGHT THEME (Editorial Systems Modernism)
   Applied by default on :root or explicitly on [data-theme="light"]
   ============================================================ */
:root,
html[data-theme="light"] {
  --color-background: #F9F9F7;
  --color-on-background: #18181B;
  --color-surface: #FFFFFF;
  --color-surface-dim: #F1F2ED;
  --color-surface-subtle: #FAFAF8;
  --color-surface-bright: #FFFFFF;
  --color-surface-container-lowest: #FFFFFF;
  --color-surface-container-low: #FAFAF8;
  --color-surface-container: #F1F2ED;
  --color-surface-container-high: #E5E8E4;
  --color-surface-container-highest: #D5DAD3;
  --color-surface-variant: #E5E8E4;
  --color-surface-elevated: #FFFFFF;
  --color-on-surface: #18181B;
  --color-on-surface-variant: #4A5852;
  --color-text-primary: #18181B;
  --color-text-secondary: #4A5852;
  --color-text-muted: #52525B;

  --color-outline: #94A39D;
  --color-outline-variant: #D5DAD3;
  --color-card-border: rgba(6, 78, 59, 0.16);
  --color-card-border-hover: rgba(6, 78, 59, 0.28);
  --color-border: rgba(6, 78, 59, 0.16);
  --color-border-subtle: rgba(6, 78, 59, 0.08);
  --color-border-hover: rgba(6, 78, 59, 0.28);

  --color-primary: #064E3B;
  --color-primary-hover: #043527;
  --color-on-primary: #FFFFFF;
  --color-primary-container: #D1FAE5;
  --color-on-primary-container: #064E3B;
  --color-accent: #064E3B;
  --color-on-accent: #FFFFFF;
  --color-surface-tint: #064E3B;

  --color-secondary: #3F3F46;
  --color-on-secondary: #FFFFFF;
  --color-secondary-container: #E4E4E7;
  --color-on-secondary-container: #27272A;

  --color-tertiary: #52525B;
  --color-on-tertiary: #FFFFFF;
  --color-tertiary-container: #E4E4E7;
  --color-on-tertiary-container: #27272A;

  --color-error: #DC2626;
  --color-on-error: #FFFFFF;
  --color-error-container: #FEE2E2;
  --color-on-error-container: #991B1B;
  --color-success: #16A34A;
  --color-on-success: #FFFFFF;
  --color-warning: #D97706;
  --color-on-warning: #FFFFFF;
  --color-inverse-surface: #18181B;
  --color-inverse-on-surface: #F9F9F7;
  --color-inverse-primary: #A7F3D0;
}

/* ============================================================
   2. DARK THEME (Near-black green-tinted canvas, Accessible Muted Text)
   ============================================================ */
html[data-theme="dark"] {
  --color-background: #090C0A;
  --color-on-background: #F8FAFC;
  --color-surface: #101512;
  --color-surface-dim: #060807;
  --color-surface-subtle: #161D19;
  --color-surface-bright: #1D2621;
  --color-surface-container-lowest: #050706;
  --color-surface-container-low: #101512;
  --color-surface-container: #161D19;
  --color-surface-container-high: #1E2721;
  --color-surface-container-highest: #28332C;
  --color-surface-variant: #1E2721;
  --color-surface-elevated: #161D19;
  --color-on-surface: #F8FAFC;
  --color-on-surface-variant: #A3B5AC;
  --color-text-primary: #F8FAFC;
  --color-text-secondary: #A3B5AC;
  --color-text-muted: #7A8E85;

  --color-outline: #7A8E85;
  --color-outline-variant: #28332C;
  --color-card-border: rgba(32, 201, 120, 0.15);
  --color-card-border-hover: rgba(32, 201, 120, 0.35);
  --color-border: rgba(32, 201, 120, 0.15);
  --color-border-subtle: rgba(32, 201, 120, 0.08);
  --color-border-hover: rgba(32, 201, 120, 0.35);

  --color-primary: #20C978;
  --color-primary-hover: #34D399;
  --color-on-primary: #052E16;
  --color-primary-container: #161D19;
  --color-on-primary-container: #34D399;
  --color-accent: #20C978;
  --color-on-accent: #052E16;
  --color-surface-tint: #20C978;

  --color-secondary: #A3B5AC;
  --color-on-secondary: #000000;
  --color-secondary-container: #1E2721;
  --color-on-secondary-container: #D1FAE5;

  --color-tertiary: #34D399;
  --color-on-tertiary: #064E3B;
  --color-tertiary-container: #064E3B;
  --color-on-tertiary-container: #D1FAE5;

  --color-error: #F87171;
  --color-on-error: #450A0A;
  --color-error-container: #7F1D1D;
  --color-on-error-container: #FECACA;
  --color-success: #4ADE80;
  --color-on-success: #022C22;
  --color-warning: #FBBF24;
  --color-on-warning: #451A03;
  --color-inverse-surface: #F8FAFC;
  --color-inverse-on-surface: #090C0A;
  --color-inverse-primary: #064E3B;
}

/* ============================================================
   3. GREEN THEME (Deep Studio Environment, Emerald Accents)
   ============================================================ */
html[data-theme="green"] {
  --color-background: #0F2922;
  --color-on-background: #E6F5EE;
  --color-surface: #14372D;
  --color-surface-dim: #0B201A;
  --color-surface-subtle: #1A473A;
  --color-surface-bright: #215A49;
  --color-surface-container-lowest: #0B201A;
  --color-surface-container-low: #14372D;
  --color-surface-container: #1A473A;
  --color-surface-container-high: #215A49;
  --color-surface-container-highest: #286D59;
  --color-surface-variant: #1A473A;
  --color-surface-elevated: #1A473A;
  --color-on-surface: #E6F5EE;
  --color-on-surface-variant: #A4CCBD;
  --color-text-primary: #E6F5EE;
  --color-text-secondary: #A4CCBD;
  --color-text-muted: #7BA896;

  --color-outline: #88BAA5;
  --color-outline-variant: #1A473A;
  --color-card-border: rgba(45, 212, 143, 0.25);
  --color-card-border-hover: rgba(45, 212, 143, 0.4);
  --color-border: rgba(45, 212, 143, 0.25);
  --color-border-subtle: rgba(45, 212, 143, 0.12);
  --color-border-hover: rgba(45, 212, 143, 0.4);

  --color-primary: #2DD48F;
  --color-primary-hover: #5DEBAd;
  --color-on-primary: #002D1E;
  --color-primary-container: #1A473A;
  --color-on-primary-container: #5DEBAd;
  --color-accent: #2DD48F;
  --color-on-accent: #002D1E;
  --color-surface-tint: #2DD48F;

  --color-secondary: #A4CCBD;
  --color-on-secondary: #073224;
  --color-secondary-container: #215A49;
  --color-on-secondary-container: #E6F5EE;

  --color-tertiary: #5DEBAd;
  --color-on-tertiary: #073224;
  --color-tertiary-container: #1A473A;
  --color-on-tertiary-container: #E6F5EE;

  --color-error: #FF8C8C;
  --color-on-error: #4A0000;
  --color-error-container: #631010;
  --color-on-error-container: #FFC2C2;
  --color-success: #4ADE80;
  --color-on-success: #022C22;
  --color-warning: #FBBF24;
  --color-on-warning: #451A03;
  --color-inverse-surface: #E6F5EE;
  --color-inverse-on-surface: #0F2922;
  --color-inverse-primary: #2DD48F;
}

/* ============================================================
   4. THEME TRANSITION ANIMATIONS (Triggered via JS)
   ============================================================ */
.theme-transitioning,
.theme-transitioning *,
.theme-transitioning *::before,
.theme-transitioning *::after {
  transition: background-color var(--motion-standard) var(--ease-standard),
              border-color 250ms cubic-bezier(0.4, 0, 0.2, 1),
              color 250ms cubic-bezier(0.4, 0, 0.2, 1),
              fill 250ms cubic-bezier(0.4, 0, 0.2, 1),
              stroke 250ms cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1) !important;
}

/* Subtle spin on the theme toggle icon during transition */
.theme-transitioning .theme-toggle-btn i,
.theme-transitioning .theme-toggle-btn .material-symbols-outlined,
.theme-transitioning #theme-toggle-icon,
.theme-transitioning #admin-theme-toggle i,
.theme-transitioning #admin-theme-toggle .material-symbols-outlined {
  transform: rotate(15deg) scale(0.9);
  opacity: 0.7;
}

/* Base icon transitions for smooth reset */
.theme-toggle-btn i,
.theme-toggle-btn .material-symbols-outlined,
#theme-toggle-icon,
#admin-theme-toggle i,
#admin-theme-toggle .material-symbols-outlined {
  transition: transform var(--motion-standard) var(--ease-standard), opacity var(--motion-standard) var(--ease-standard);
}

@media (prefers-reduced-motion: reduce) {
  .theme-transitioning,
  .theme-transitioning *,
  .theme-transitioning *::before,
  .theme-transitioning *::after {
    transition: none !important;
  }

  .theme-transitioning .theme-toggle-btn i,
  .theme-transitioning .theme-toggle-btn .material-symbols-outlined,
  .theme-transitioning #theme-toggle-icon,
  .theme-transitioning #admin-theme-toggle i,
  .theme-transitioning #admin-theme-toggle .material-symbols-outlined,
  .theme-toggle-btn i,
  .theme-toggle-btn .material-symbols-outlined,
  #theme-toggle-icon,
  #admin-theme-toggle i,
  #admin-theme-toggle .material-symbols-outlined {
    transition: none !important;
    transform: none !important;
  }
}

/* ============================================================
   GLOBAL BASE RESETS & TYPOGRAPHIC RULES
   ============================================================ */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  /* Prevent fixed 64px header from hiding anchor targets */
  scroll-padding-top: 4.5rem;
}


body {
  margin: 0;
  padding: 0;
  background-color: var(--color-background);
  color: var(--color-on-surface);
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--motion-standard) var(--ease-standard), color var(--motion-standard) var(--ease-standard);
}

/* JetBrains Mono strictly reserved for code, benchmarks, paths, dates, tags, and IDs */
code,
kbd,
samp,
pre,
.font-mono,
.font-label-code,
.font-label-micro {
  font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Accessible visible focus states */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Material Symbols Outlined configuration */
.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  vertical-align: middle;
  line-height: 1;
  display: inline-block;
  user-select: none;
}

/* ============================================================
   PHASE 1 REUSABLE COMPONENT SYSTEM
   ============================================================ */

/* 1. Page Container (Fluid Auto-Screen Layout) */
.page-container {
  max-width: 2560px;
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(1.5rem, 5vw, 4rem);
  padding-right: clamp(1.5rem, 5vw, 4rem);
}

.container-reading {
  max-width: var(--container-reading);
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(1rem, 3.5vw, 1.5rem);
  padding-right: clamp(1rem, 3.5vw, 1.5rem);
}

.container-study {
  max-width: var(--container-study);
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(1rem, 3.5vw, 2rem);
  padding-right: clamp(1rem, 3.5vw, 2rem);
}

.container-catalog {
  max-width: var(--container-catalog);
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(1rem, 3.5vw, 2.5rem);
  padding-right: clamp(1rem, 3.5vw, 2.5rem);
}

.container-canvas {
  max-width: var(--container-canvas);
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(1.5rem, 5vw, 4rem);
  padding-right: clamp(1.5rem, 5vw, 4rem);
}

@media (max-width: 640px) {
  .page-container,
  .container-reading,
  .container-study,
  .container-catalog,
  .container-canvas {
    padding-left: var(--gutter-mobile);
    padding-right: var(--gutter-mobile);
  }
}

/* 2. Section Spacing */
.section-spacing {
  padding-top: var(--space-xl);
  padding-bottom: var(--space-xl);
}

.section-spacing-sm {
  padding-top: var(--space-lg);
  padding-bottom: var(--space-lg);
}

.section-spacing-lg {
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-2xl);
}

/* 3. Cards & Containers */
.card {
  background-color: var(--color-surface-container-low);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  transition: background-color var(--motion-standard) var(--ease-standard), border-color var(--motion-standard) var(--ease-standard), box-shadow var(--motion-standard) var(--ease-standard);
}

.card-interactive {
  cursor: pointer;
}

.card-interactive:hover {
  background-color: var(--color-surface-container);
  border-color: var(--color-border-hover);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.card-highlight {
  border-color: var(--color-border-hover);
  box-shadow: 0 0 0 1px var(--color-card-border-hover);
}

/* 4. Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  min-height: 44px;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-lg);
  font-family: 'Inter', sans-serif;
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.25;
  cursor: pointer;
  transition: background-color var(--motion-standard) var(--ease-standard),
              border-color 0.2s cubic-bezier(0.4, 0, 0.2, 1),
              color 0.2s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.15s cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid transparent;
  user-select: none;
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.97);
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.btn:disabled,
.btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
  transform: none;
}


.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.btn-primary:hover {
  background-color: var(--color-secondary);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--color-surface-container-low);
  color: var(--color-on-surface);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background-color: var(--color-surface-container);
  border-color: var(--color-border-hover);
  color: var(--color-primary);
  transform: translateY(-1px);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-on-surface-variant);
}

.btn-ghost:hover {
  background-color: var(--color-surface-container);
  color: var(--color-on-surface);
}

.btn-icon {
  min-width: 44px;
  min-height: 44px;
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: var(--radius-lg);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-surface-container-low);
  color: var(--color-on-surface-variant);
  border: 1px solid var(--color-border);
}

.btn-icon:hover {
  background-color: var(--color-surface-container);
  color: var(--color-primary);
}

/* 4.1 Purpose-Driven Store & Action Buttons */
.btn-download {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  border: 1px solid transparent;
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.btn-download:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(32, 201, 120, 0.25);
}

.btn-external {
  background-color: var(--color-surface-container-low);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
  font-weight: 500;
}

.btn-external:hover {
  background-color: var(--color-surface-container);
  border-color: var(--color-border-hover);
  color: var(--color-primary);
  transform: translateY(-1px);
}

/* 4.1 Button Icon Interactions */
.btn i,
.btn .material-symbols-outlined,
.btn svg {
  transition: transform var(--motion-standard) var(--ease-standard);
}

/* Standalone icon scaling */
.btn-icon:hover i,
.btn-icon:hover .material-symbols-outlined,
.btn-icon:hover svg {
  transform: scale(1.05);
}

/* Leading icons slide slightly left */
.btn:not(.btn-icon):hover i:first-child:not(:last-child),
.btn:not(.btn-icon):hover .material-symbols-outlined:first-child:not(:last-child),
.btn:not(.btn-icon):hover svg:first-child:not(:last-child) {
  transform: translateX(-2px);
}

/* Trailing icons slide slightly right */
.btn:not(.btn-icon):hover i:last-child:not(:first-child),
.btn:not(.btn-icon):hover .material-symbols-outlined:last-child:not(:first-child),
.btn:not(.btn-icon):hover svg:last-child:not(:first-child) {
  transform: translateX(2px);
}

/* 5. Badges & Tags */
.badge,
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  font-family: 'JetBrains Mono', monospace;
  font-size: var(--text-xs);
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  border: 1px solid transparent;
}

.badge-accent {
  background-color: var(--color-primary-container);
  color: var(--color-on-primary-container);
  border-color: var(--color-card-border-hover);
}

.badge-neutral {
  background-color: var(--color-surface-container);
  color: var(--color-on-surface-variant);
  border-color: var(--color-border);
}

.badge-success {
  background-color: rgba(52, 211, 153, 0.12);
  color: var(--color-success);
  border-color: rgba(52, 211, 153, 0.25);
}

.badge-warning {
  background-color: rgba(251, 191, 36, 0.12);
  color: var(--color-warning);
  border-color: rgba(251, 191, 36, 0.25);
}

.badge-error {
  background-color: rgba(239, 68, 68, 0.12);
  color: var(--color-error);
  border-color: rgba(239, 68, 68, 0.25);
}

/* 6. Metadata */
.metadata-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-xs) var(--space-sm);
  font-family: 'JetBrains Mono', monospace;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.metadata-item {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.metadata-divider {
  color: var(--color-outline-variant);
  user-select: none;
}

/* 7. Inputs */
.input-text {
  width: 100%;
  min-height: 44px;
  padding: 0.5rem 0.875rem;
  background-color: var(--color-surface-container-lowest);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-on-surface);
  font-family: 'Inter', sans-serif;
  font-size: 0.875rem;
  transition: border-color var(--motion-micro) var(--ease-standard), background-color var(--motion-micro) var(--ease-standard);
}

.input-text:focus {
  outline: none;
  border-color: var(--color-primary);
  background-color: var(--color-surface-container-low);
  box-shadow: 0 0 0 1px var(--color-primary);
}

.input-text.input-error {
  border-color: var(--color-error);
}

.input-text.input-error:focus {
  border-color: var(--color-error);
  box-shadow: 0 0 0 1px var(--color-error);
}

.input-text::placeholder {
  color: var(--color-text-muted);
}

.input-search {
  width: 100%;
  min-height: 44px;
  padding: var(--space-sm) 3.5rem var(--space-sm) 2.5rem;
  background-color: var(--color-surface-container-low);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  color: var(--color-on-surface);
  font-family: 'Inter', sans-serif;
  font-size: 0.875rem;
  transition: border-color var(--motion-micro) var(--ease-standard), background-color var(--motion-micro) var(--ease-standard);
}

.input-search:focus {
  outline: none;
  border-color: var(--color-primary);
  background-color: var(--color-surface-container);
  box-shadow: 0 0 0 1px var(--color-primary);
}

.input-search::placeholder {
  color: var(--color-text-muted);
}

/* 8. Filter Pills */
.filter-pill {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0.375rem 0.875rem;
  border-radius: var(--radius-lg);
  font-family: 'JetBrains Mono', monospace;
  font-size: var(--text-sm);
  font-weight: 500;
  background-color: var(--color-surface-container-low);
  color: var(--color-on-surface-variant);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: background-color var(--motion-micro) var(--ease-standard), color var(--motion-micro) var(--ease-standard), border-color var(--motion-micro) var(--ease-standard);
  user-select: none;
  white-space: nowrap;
}

.filter-pill:hover {
  background-color: var(--color-surface-container);
  color: var(--color-on-surface);
}

.filter-pill.active {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  border-color: var(--color-primary);
  font-weight: 600;
}

/* 9. Empty States & Alerts */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
  background-color: var(--color-surface-container-low);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-xl);
  gap: var(--space-sm);
}

.alert-error {
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  line-height: 1.625;
  border: 1px solid var(--color-error-container);
  background-color: var(--color-error-container);
  color: var(--color-on-error-container);
  font-family: 'JetBrains Mono', monospace;
}

.alert-success {
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  line-height: 1.625;
  border: 1px solid var(--color-success);
  background-color: rgba(52, 211, 153, 0.12);
  color: var(--color-success);
  font-family: 'JetBrains Mono', monospace;
}

.card-recessed {
  background-color: var(--color-surface-container-lowest);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
}

.empty-state-icon {
  font-size: 2.25rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
}

.empty-state-title {
  font-family: 'Inter', sans-serif;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-on-surface);
}

.empty-state-desc {
  font-family: 'Inter', sans-serif;
  font-size: 0.875rem;
  color: var(--color-on-surface-variant);
  max-width: 24rem;
}

/* 10. Image Frames */
.image-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface-container-lowest);
}

.image-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--motion-emphasis) var(--ease-standard);
}

.image-frame:hover img {
  transform: scale(1.02);
}

/* 11. Dividers */
.divider {
  width: 100%;
  height: 1px;
  background-color: var(--color-border);
  margin: var(--space-md) 0;
  border: none;
}

.divider-subtle {
  width: 100%;
  height: 1px;
  background-color: var(--color-border-subtle);
  margin: var(--space-md) 0;
  border: none;
}

/* ============================================================
   EDITORIAL READING EXPERIENCE (FOR ARTICLES & CASE STUDIES)
   ============================================================ */

/* Reading progress bar */
.reading-progress-track {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: transparent;
  z-index: 60;
  pointer-events: none;
}

.reading-progress-fill {
  height: 100%;
  width: 0%;
  background: var(--color-primary);
  transition: width 0.1s ease-out;
}

/* Centered reading lane (65–75 characters per line optimal reading) */
.reading-lane {
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
  width: 100%;
}

/* Prose typography */
.prose-editorial {
  font-size: 1.125rem;
  line-height: 1.75;
  color: var(--color-on-surface);
}

.prose-editorial p {
  margin-top: 1.25em;
  margin-bottom: 1.25em;
  color: var(--color-on-surface-variant);
}

.prose-editorial h2 {
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.3;
  margin-top: 2em;
  margin-bottom: 0.75em;
  color: var(--color-on-surface);
}

.prose-editorial h3 {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.4;
  margin-top: 1.75em;
  margin-bottom: 0.5em;
  color: var(--color-on-surface);
}

.prose-editorial blockquote {
  border-left: 3px solid var(--color-primary);
  padding-left: 1.25rem;
  margin: 1.75em 0;
  font-style: italic;
  color: var(--color-on-surface);
}

.prose-editorial ul,
.prose-editorial ol {
  margin: 1.25em 0;
  padding-left: 1.5em;
  color: var(--color-on-surface-variant);
}

.prose-editorial li {
  margin-top: 0.5em;
  margin-bottom: 0.5em;
}

/* Inline article images */
.article-image,
.prose-editorial img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  margin: 1.5rem auto;
  border: 1px solid var(--color-card-border);
}

.article-image-small {
  width: 60%;
  max-width: 100%;
  margin: 1.5rem auto;
}

.article-image-medium {
  width: 80%;
  max-width: 100%;
  margin: 1.5rem auto;
}

.article-image-large,
.article-image-full {
  width: 100%;
  max-width: 100%;
  margin: 1.5rem auto;
}

/* Code block with top chrome and copy button */
.code-block-container {
  margin: 1.5rem 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-surface-container-lowest);
  border: 1px solid var(--color-border);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 1rem;
  background-color: var(--color-surface-container);
  border-bottom: 1px solid var(--color-border);
  font-family: 'JetBrains Mono', monospace;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.code-block-pre {
  margin: 0;
  padding: 1rem;
  overflow-x: auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-on-surface);
}

/* ============================================================
   HORIZONTAL VISUAL SHOWCASE RAIL
   ============================================================ */

.showcase-rail {
  display: flex;
  gap: var(--space-lg);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  padding-bottom: var(--space-sm);
  padding-top: var(--space-xs);
  -webkit-overflow-scrolling: touch;
}

.showcase-card {
  scroll-snap-align: start;
  flex-shrink: 0;
  width: 85vw;
  max-width: 580px;
  background-color: var(--color-surface-container-low);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-md);
  transition: background-color var(--motion-standard) var(--ease-standard), border-color var(--motion-standard) var(--ease-standard), transform var(--motion-standard) var(--ease-standard);
}

.showcase-card:hover {
  background-color: var(--color-surface-container);
  border-color: var(--color-border-hover);
}

@media (min-width: 640px) {
  .showcase-card {
    width: 380px;
    max-width: 420px;
  }
}

/* Utility scrollbar hiding */
.no-scrollbar::-webkit-scrollbar,
.scrollbar-none::-webkit-scrollbar {
  display: none;
}

.no-scrollbar,
.scrollbar-none {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

/* ============================================================
   MODAL LIGHTBOX
   ============================================================ */

.lightbox-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(10, 14, 22, 0.85);
  backdrop-filter: blur(8px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--motion-standard) var(--ease-standard);
}

.lightbox-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lightbox-img {
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* ============================================================
   REDUCED MOTION SUPPORT
   ============================================================ */

@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  /* Disable interaction transforms for accessibility */
  .btn:active,
  .btn-primary:hover,
  .btn-secondary:hover,
  .btn-icon:hover i,
  .btn-icon:hover .material-symbols-outlined,
  .btn-icon:hover svg,
  .btn:not(.btn-icon):hover i:first-child:not(:last-child),
  .btn:not(.btn-icon):hover .material-symbols-outlined:first-child:not(:last-child),
  .btn:not(.btn-icon):hover svg:first-child:not(:last-child),
  .btn:not(.btn-icon):hover i:last-child:not(:first-child),
  .btn:not(.btn-icon):hover .material-symbols-outlined:last-child:not(:first-child),
  .btn:not(.btn-icon):hover svg:last-child:not(:first-child) {
    transform: none !important;
  }
}

/* ============================================================
   GLOBAL FOOTER — one-line layout
   name | Explore links + social icons underneath | legal links
   then a copyright bar below
   ============================================================ */
.site-footer {
  width: 100%;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface-container-lowest);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1.5rem;
  padding-top: 2rem;
  padding-bottom: 2rem;
}

.site-footer__inner .site-footer__brand {
  justify-self: start;
  color: var(--color-text-primary);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.site-footer__bottom {
  padding-top: 1.25rem;
  padding-bottom: 1.5rem;
  border-top: 1px solid var(--color-border-subtle);
  text-align: center;
}

.site-footer__bottom p {
  margin: 0;
  color: var(--color-text-muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: var(--text-xs);
}

.site-footer__explore {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.site-footer__list,
.site-footer__social {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

.site-footer__list {
  gap: 0.25rem 1.5rem;
}

.site-footer__legal {
  justify-content: flex-end;
  gap: 0.25rem 1.25rem;
}

.site-footer__legal a {
  color: var(--color-text-muted);
}

.site-footer a {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--motion-micro) var(--ease-standard);
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--color-text-primary);
}

.site-footer a:focus-visible {
  outline: 2px solid var(--color-text-primary);
  outline-offset: 3px;
  border-radius: 2px;
}

.site-footer__social {
  justify-content: center;
  gap: 0.25rem;
}

.site-footer__social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-md);
}

.site-footer__social a:hover {
  background: var(--color-surface-container);
}

.site-footer__icon {
  width: 1.125rem;
  height: 1.125rem;
  flex-shrink: 0;
}

/* Tablet and mobile: stack, keep 44px touch targets */
@media (max-width: 860px) {
  .site-footer__inner {
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
    gap: 1.25rem;
  }

  .site-footer__list,
  .site-footer__legal {
    justify-content: center;
  }

  .site-footer__list a,
  .site-footer__legal a {
    display: inline-flex;
    align-items: center;
    min-height: 2.75rem;
  }

  .site-footer__social a {
    width: 2.75rem;
    height: 2.75rem;
  }

  .site-footer__inner .site-footer__brand {
    justify-self: center;
  }
}

/* ============================================================
   PLATFORM LOGO COMPONENT
   ============================================================ */
.platform-logo-wrapper {
  display: inline-flex;
  position: relative;
  align-items: center;
  transition: opacity var(--motion-standard) var(--ease-standard), transform var(--motion-standard) var(--ease-standard);
  height: 48px; /* Desktop */
}
@media (max-width: 1024px) {
  .platform-logo-wrapper {
    height: 38px; /* Tablet/Mobile */
  }
}
.platform-logo-wrapper:hover {
  opacity: 0.85;
  transform: scale(1.02);
}
.platform-logo-spacer {
  height: 100%;
  width: auto;
  opacity: 0;
  object-fit: contain;
  pointer-events: none;
}
.platform-logo-mask {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-on-surface); /* Theme aware color */
  transition: background-color var(--motion-standard) var(--ease-standard);
  -webkit-mask-image: url('/assets/logo/logo.png');
  mask-image: url('/assets/logo/logo.png');
  -webkit-mask-size: contain;
  mask-size: contain;
  -webkit-mask-position: left center;
  mask-position: left center;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
}
@supports not ((-webkit-mask-image: none) or (mask-image: none)) {
  .platform-logo-spacer {
    opacity: 1; /* Show original image */
  }
  .platform-logo-mask {
    display: none;
  }
}

/* ============================================================
   RESPONSIVE DATA TABLES & FILTER BARS
   ============================================================ */

/* Controlled horizontal scroll for filter bars (no clipping on 375px mobile) */
.filter-scroll-container {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding-bottom: 4px;
  max-width: 100%;
}
.filter-scroll-container::-webkit-scrollbar {
  display: none;
}

/* Responsive Table Wrapper */
.table-responsive-wrapper {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
  border-radius: var(--radius-md);
}

.table-responsive-wrapper::-webkit-scrollbar {
  height: 6px;
}
.table-responsive-wrapper::-webkit-scrollbar-thumb {
  background-color: var(--color-border);
  border-radius: 9999px;
}

/* Filter scroll wrapper with edge-fade indicators for mobile overflow affordance */
.filter-scroll-wrapper {
  position: relative;
  width: 100%;
  max-width: 100%;
}

.filter-scroll-wrapper::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 32px;
  background: linear-gradient(to right, transparent, var(--color-background));
  pointer-events: none;
  opacity: 1;
  transition: opacity var(--motion-standard) var(--ease-standard);
}

@media (min-width: 768px) {
  .filter-scroll-wrapper::after {
    display: none;
  }
}

/* ============================================================
   EDITORIAL SYSTEMS MODERNISM — HOMEPAGE NARRATIVE & COMPONENTS
   ============================================================ */

.editorial-narrative-flow {
  display: flex;
  flex-direction: column;
  gap: 3.5rem;
  width: 100%;
}

@media (min-width: 1024px) {
  .editorial-narrative-flow {
    gap: 4.5rem;
  }
}

.editorial-section {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.editorial-section-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-width: 800px;
}

.editorial-section-header.with-action {
  max-width: none;
  flex-direction: row;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.editorial-overline {
  font-family: 'JetBrains Mono', monospace;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

.editorial-title {
  font-family: var(--font-headline);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  color: var(--color-on-surface);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0;
}

.editorial-subtitle {
  font-size: var(--text-body-md);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* Hero Narrative Elements */
.hero-thesis-statement {
  border-left: 2px solid var(--color-primary);
  padding-left: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.hero-research-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  background: var(--color-surface-container-low);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-top: var(--space-4);
}

.hero-research-item {
  background: transparent;
  padding: 9px 16px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
  min-width: 140px;
  border-right: 1px solid var(--color-border);
}

.hero-research-item:last-child {
  border-right: none;
}

.hero-research-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--color-text-muted);
}

.hero-research-val {
  font-size: 12px;
  font-weight: 500;
  color: var(--color-on-surface);
  font-family: var(--font-sans);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

@media (max-width: 520px) {
  .hero-research-strip {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
  .hero-research-item {
    border-right: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border-subtle);
  }
  .hero-research-item:nth-child(even) {
    border-right: none;
  }
  .hero-research-item:last-child {
    grid-column: 1 / -1;
    border-bottom: none;
  }
}

/* Architectural Spotlight Dossier */
.architectural-spotlight-dossier {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  padding: var(--space-4) 0;
}

@media (min-width: 1024px) {
  .architectural-spotlight-dossier {
    grid-template-columns: 7fr 5fr;
    align-items: center;
    gap: var(--space-8);
  }
}

/* Publication Journal Feed */
.publication-journal-feed {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.publication-journal-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-5) 0;
  border-bottom: 1px solid var(--color-border-subtle);
  text-decoration: none;
  transition: background-color var(--motion-micro) var(--ease-standard);
}

.publication-journal-row:last-child {
  border-bottom: none;
}

.publication-journal-row:hover {
  background-color: var(--color-surface-container-low);
}

.publication-journal-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--color-text-muted);
  flex-wrap: wrap;
}

.publication-journal-title {
  font-family: var(--font-headline);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-on-surface);
  line-height: 1.35;
  transition: color var(--motion-micro) var(--ease-standard);
}

.publication-journal-row:hover .publication-journal-title {
  color: var(--color-primary);
}

.publication-journal-abstract {
  font-size: var(--text-body-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* Lab Empirical Dossier Card */
.lab-empirical-dossier {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  padding: var(--space-4) 0;
}

@media (min-width: 1024px) {
  .lab-empirical-dossier {
    grid-template-columns: 7fr 5fr;
    gap: var(--space-8);
  }
}

/* Convictions & Trajectory Split */
.convictions-trajectory-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

@media (min-width: 900px) {
  .convictions-trajectory-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.conviction-dossier-card {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.conviction-item {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border-subtle);
}

.conviction-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.conviction-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
}

.conviction-body {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* ============================================================
   SECTION VISUAL DIVIDERS (Editorial rhythm between acts)
   ============================================================ */

.section-act-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
  opacity: 0.4;
}

.section-act-divider::before,
.section-act-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

.section-act-divider span {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  white-space: nowrap;
}

/* ============================================================
   COMPACT STAGING EMPTY STATE (Architecture in-progress state)
   ============================================================ */

.staging-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2.5rem 1.5rem;
  background: var(--color-surface);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  gap: 0.5rem;
}

.staging-state-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}

.staging-state-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-on-surface);
}

.staging-state-desc {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  max-width: 28rem;
  line-height: 1.55;
  margin: 0;
}

/* Publication journal: ensure editorial-subtitle and publication body use design tokens */
.publication-journal-abstract {
  font-size: var(--text-body-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* Editorial section header: tighter control on inner flex gap */
.editorial-section-header.with-action > div {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

/* ============================================================
   MOTION SYSTEM (Phase 4: Coherent Interaction)
   ============================================================ */

/* 1. Base Interactions */
a, button, input, select, textarea, .btn, .product-card, .experiment-card {
  transition-property: color, background-color, border-color, text-decoration-color, fill, stroke, opacity, box-shadow, transform, filter, backdrop-filter;
  transition-timing-function: var(--ease-standard);
  transition-duration: var(--motion-standard);
}

.btn:hover {
  transform: translateY(-1px);
}
.btn:active {
  transform: translateY(0);
}

.product-card:hover, .experiment-card:hover {
  transform: translateY(-2px);
  /* shadow handled by tailwind classes usually, but transform adds spatial depth */
}

/* 2. Image Hover Motion */
.image-frame img, .product-card img, .gallery-item img {
  transition: transform var(--motion-emphasis) var(--ease-standard);
}
.image-frame:hover img, .product-card:hover img, .gallery-item:hover img {
  transform: scale(1.03);
}

/* 3. Section Reveal (IntersectionObserver) */
.reveal-section {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--motion-emphasis) var(--ease-decelerate), 
              transform var(--motion-emphasis) var(--ease-decelerate);
}
.reveal-visible {
  opacity: 1;
  transform: translateY(0);
}

/* 4. Page Transitions */
.page-transition-wrapper {
  opacity: 1;
  transform: translateY(0);
  transition: opacity var(--motion-standard) var(--ease-standard),
              transform var(--motion-standard) var(--ease-standard);
}
html.is-animating .page-transition-wrapper {
  opacity: 0;
  transform: translateY(8px);
}

/* 5. Dropdowns & Menus */
.dropdown-menu, .mobile-menu-drawer {
  transition: opacity var(--motion-standard) var(--ease-standard),
              transform var(--motion-standard) var(--ease-standard),
              visibility var(--motion-standard) var(--ease-standard);
}

/* 6. Reduced Motion Accessibility */
@media (prefers-reduced-motion: reduce) {

  .reveal-section {
    opacity: 1 !important;
    transform: none !important;
  }
  html.is-animating .page-transition-wrapper {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ============================================================ */
/* ACHIEVEMENTS LIGHTBOX (achv-)                                */
/* ============================================================ */
.achv-lightbox {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}
.achv-lightbox.hidden {
    display: none;
}
.achv-lightbox-backdrop {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    z-index: -1;
}
.achv-lightbox-content {
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 100%;
    max-height: 80vh;
    position: relative;
    width: 100%;
}
.achv-lightbox-image-container {
    position: relative;
    max-width: 80%;
    max-height: 100%;
    display: flex;
    justify-content: center;
}
.achv-lightbox-img {
    max-width: 100%;
    max-height: 80vh;
    object-fit: contain;
    border-radius: 4px;
}
.achv-lightbox-btn {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.2s;
}
.achv-lightbox-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}
.achv-lightbox-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
}
.achv-lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
}
.achv-lightbox-nav.prev {
    left: 2rem;
}
.achv-lightbox-nav.next {
    right: 2rem;
}
.achv-lightbox-counter {
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    color: white;
    background: rgba(0,0,0,0.5);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.85rem;
}
.achv-lightbox-caption {
    color: white;
    text-align: center;
    margin-top: 2rem;
    max-width: 80%;
}
.achv-lightbox-caption h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}
.achv-lightbox-caption p {
    font-size: 0.9rem;
    opacity: 0.8;
}
@media (max-width: 768px) {
    .achv-lightbox-nav { display: none !important; }
    .achv-lightbox-image-container { max-width: 100%; }
    .achv-lightbox { padding: 1rem; }
}