/* ============================================================
   SHARED.CSS — Multi-Tool Web App
   Design tokens, components, and layout utilities.
   All CSS custom properties are defined here.
   ============================================================ */

/* ── Design Tokens ─────────────────────────────────────────── */
:root {
  /* Primary brand color — change these two lines to retheme */
  --color-primary:       #2563eb;
  --color-primary-dark:  #1d4ed8;
  --color-primary-light: #3b82f6;

  /* Surfaces */
  --color-bg:            #ffffff;
  --color-bg-secondary:  #f8fafc;
  --color-bg-tertiary:   #f1f5f9;
  --color-surface:       #ffffff;
  --color-surface-raised:#ffffff;

  /* Borders */
  --color-border:        #e2e8f0;
  --color-border-strong: #cbd5e1;

  /* Text */
  --color-text:          #0f172a;
  --color-text-secondary:#475569;
  --color-text-muted:    #94a3b8;
  --color-text-inverse:  #ffffff;

  /* Semantic */
  --color-success:       #10b981;
  --color-warning:       #f59e0b;
  --color-error:         #ef4444;

  /* Shadows */
  --shadow-sm:   0 1px 2px 0 rgba(0,0,0,.05);
  --shadow-md:   0 4px 6px -1px rgba(0,0,0,.07), 0 2px 4px -1px rgba(0,0,0,.04);
  --shadow-lg:   0 10px 15px -3px rgba(0,0,0,.07), 0 4px 6px -2px rgba(0,0,0,.04);
  --shadow-xl:   0 20px 25px -5px rgba(0,0,0,.07), 0 10px 10px -5px rgba(0,0,0,.03);

  /* Radius */
  --radius-sm:   6px;
  --radius-md:   8px;
  --radius-lg:   12px;
  --radius-xl:   14px;
  --radius-full: 9999px;

  /* Spacing scale */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-8:  32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', monospace;

  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;

  --leading-tight:  1.25;
  --leading-snug:   1.375;
  --leading-normal: 1.5;
  --leading-relaxed:1.625;

  --font-normal:   400;
  --font-medium:   500;
  --font-semibold: 600;
  --font-bold:     700;

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-base:   200ms ease;
  --transition-slow:   300ms ease;

  /* Layout */
  --container-sm:   640px;
  --container-md:   768px;
  --container-lg:   1024px;
  --container-xl:   1280px;
  --container-2xl:  1536px;

  /* Header */
  --header-height: 64px;
}

/* Dark theme overrides */
[data-theme="dark"] {
  --color-primary:       #3b82f6;
  --color-primary-dark:  #2563eb;
  --color-primary-light: #60a5fa;

  --color-bg:            #0f172a;
  --color-bg-secondary:  #1e293b;
  --color-bg-tertiary:   #334155;
  --color-surface:       #1e293b;
  --color-surface-raised:#334155;

  --color-border:        #334155;
  --color-border-strong: #475569;

  --color-text:          #f1f5f9;
  --color-text-secondary:#94a3b8;
  --color-text-muted:    #64748b;
  --color-text-inverse:  #0f172a;

  --shadow-sm:   0 1px 2px 0 rgba(0,0,0,.3);
  --shadow-md:   0 4px 6px -1px rgba(0,0,0,.3), 0 2px 4px -1px rgba(0,0,0,.2);
  --shadow-lg:   0 10px 15px -3px rgba(0,0,0,.3), 0 4px 6px -2px rgba(0,0,0,.2);
  --shadow-xl:   0 20px 25px -5px rgba(0,0,0,.3), 0 10px 10px -5px rgba(0,0,0,.2);
}

/* ── Reset & Base ───────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color var(--transition-slow), color var(--transition-slow);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img, svg { display: block; max-width: 100%; }

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover { text-decoration: underline; }

ul, ol { list-style: none; }

button {
  cursor: pointer;
  font-family: var(--font-sans);
  border: none;
  background: none;
}

input, textarea, select {
  font-family: var(--font-sans);
  font-size: var(--text-base);
}

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  color: var(--color-text);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p { color: var(--color-text-secondary); line-height: var(--leading-relaxed); }

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--color-bg-tertiary);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
}

/* ── Layout ─────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 640px)  { .container { padding-inline: var(--space-6); } }
@media (min-width: 1024px) { .container { padding-inline: var(--space-8); } }

main { flex: 1; }

.section {
  padding-block: var(--space-16);
}

.section-sm {
  padding-block: var(--space-10);
}

/* ── Header ─────────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: background-color var(--transition-slow), border-color var(--transition-slow);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--space-4);
}

/* Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  flex-shrink: 0;
}

.site-logo:hover { text-decoration: none; }

.site-logo__wordmark {
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.site-logo__wordmark span {
  color: var(--color-primary);
}

/* Desktop Nav */
.site-nav {
  display: none;
  align-items: center;
  gap: var(--space-1);
}

@media (min-width: 768px) {
  .site-nav { display: flex; }
}

.site-nav__link {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background-color var(--transition-fast);
  text-decoration: none;
}

.site-nav__link:hover {
  color: var(--color-text);
  background: var(--color-bg-secondary);
  text-decoration: none;
}

.site-nav__link.active {
  color: var(--color-primary);
  background: color-mix(in srgb, var(--color-primary) 8%, transparent);
}

/* Tools dropdown */
.nav-dropdown {
  position: relative;
}

.nav-dropdown__trigger {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background-color var(--transition-fast);
  cursor: pointer;
  background: none;
  border: none;
}

.nav-dropdown__trigger:hover {
  color: var(--color-text);
  background: var(--color-bg-secondary);
}

.nav-dropdown__trigger svg {
  transition: transform var(--transition-fast);
}

.nav-dropdown.open .nav-dropdown__trigger svg {
  transform: rotate(180deg);
}

.nav-dropdown__menu {
  display: none;
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 50%;
  transform: translateX(-50%);
  min-width: 220px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--space-2);
  z-index: 200;
}

.nav-dropdown.open .nav-dropdown__menu {
  display: block;
  animation: dropdown-in var(--transition-fast) ease;
}

@keyframes dropdown-in {
  from { opacity: 0; transform: translateX(-50%) translateY(-6px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

.nav-dropdown__item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  text-decoration: none;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.nav-dropdown__item:hover {
  background: var(--color-bg-secondary);
  color: var(--color-text);
  text-decoration: none;
}

.nav-dropdown__item-icon {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  color: var(--color-primary);
}

.nav-dropdown__badge {
  margin-left: auto;
  font-size: var(--text-xs);
  background: var(--color-bg-tertiary);
  color: var(--color-text-muted);
  padding: 1px 6px;
  border-radius: var(--radius-full);
}

/* Header actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* Theme toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  transition: color var(--transition-fast), background-color var(--transition-fast);
  cursor: pointer;
}

.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-bg-tertiary);
}

.theme-toggle .icon-sun  { display: none; }
.theme-toggle .icon-moon { display: block; }

[data-theme="dark"] .theme-toggle .icon-sun  { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* Hamburger (mobile) */
.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

@media (min-width: 768px) { .hamburger { display: none; } }

.hamburger__line {
  height: 2px;
  background: var(--color-text-secondary);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.hamburger.open .hamburger__line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.open .hamburger__line:nth-child(2) {
  opacity: 0;
}
.hamburger.open .hamburger__line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav drawer */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-surface);
  z-index: 90;
  overflow-y: auto;
  padding: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.mobile-nav.open {
  display: block;
  animation: slide-down var(--transition-base) ease;
}

@media (min-width: 768px) { .mobile-nav { display: none !important; } }

@keyframes slide-down {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.mobile-nav__link {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.mobile-nav__link:hover {
  background: var(--color-bg-secondary);
  color: var(--color-text);
  text-decoration: none;
}

.mobile-nav__section-title {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  padding: var(--space-4) var(--space-4) var(--space-2);
}

.mobile-nav__divider {
  height: 1px;
  background: var(--color-border);
  margin-block: var(--space-3);
}

/* ── Footer ─────────────────────────────────────────────────── */
.site-footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-12) var(--space-8);
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 640px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
}

.footer-brand__tagline {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-3);
  max-width: 28ch;
  line-height: var(--leading-relaxed);
}

.footer-heading {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-links a {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.footer-bottom {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.footer-bottom__copy {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.footer-bottom__note {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  padding: 10px var(--space-5);
  border-radius: var(--radius-md);
  border: 1.5px solid transparent;
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
  cursor: pointer;
  line-height: 1;
}

.btn:hover { text-decoration: none; }

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border-strong);
}

.btn-secondary:hover {
  background: var(--color-bg-secondary);
  border-color: var(--color-border-strong);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border-color: transparent;
}

.btn-ghost:hover {
  background: var(--color-bg-secondary);
  color: var(--color-text);
}

.btn-lg {
  font-size: var(--text-base);
  padding: 14px var(--space-8);
  border-radius: var(--radius-lg);
}

.btn-sm {
  font-size: var(--text-xs);
  padding: 6px var(--space-3);
  border-radius: var(--radius-sm);
}

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

/* ── Badge ───────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-primary {
  background: color-mix(in srgb, var(--color-primary) 12%, transparent);
  color: var(--color-primary);
}

.badge-muted {
  background: var(--color-bg-tertiary);
  color: var(--color-text-muted);
}

.badge-warning {
  background: color-mix(in srgb, var(--color-warning) 12%, transparent);
  color: var(--color-warning);
}

/* ── Tool Card ───────────────────────────────────────────────── */
.tool-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  position: relative;
  overflow: hidden;
}

.tool-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-border-strong);
}

.tool-card.coming-soon {
  opacity: 0.7;
}

.tool-card.coming-soon:hover {
  transform: none;
  box-shadow: none;
  cursor: default;
}

.tool-card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: color-mix(in srgb, var(--color-primary) 10%, transparent);
  border-radius: var(--radius-lg);
  color: var(--color-primary);
  flex-shrink: 0;
}

.tool-card__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
}

.tool-card__name {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  line-height: var(--leading-snug);
}

.tool-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  flex: 1;
}

.tool-card__footer {
  margin-top: auto;
  padding-top: var(--space-2);
}

/* ── Article Card ────────────────────────────────────────────── */
.article-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  text-decoration: none;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.article-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-strong);
  text-decoration: none;
}

.article-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.article-card__meta-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--color-text-muted);
}

.article-card__title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  line-height: var(--leading-snug);
}

.article-card__excerpt {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.article-card__cta {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-primary);
  margin-top: auto;
}

/* ── Drop Zone ───────────────────────────────────────────────── */
.drop-zone {
  border: 2px dashed var(--color-border-strong);
  border-radius: var(--radius-xl);
  padding: var(--space-12) var(--space-8);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
  background: var(--color-bg-secondary);
  position: relative;
}

.drop-zone:hover,
.drop-zone.dragover {
  border-color: var(--color-primary);
  background: color-mix(in srgb, var(--color-primary) 4%, var(--color-bg-secondary));
}

.drop-zone.dragover {
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--color-primary) 15%, transparent);
}

.drop-zone__icon {
  width: 56px;
  height: 56px;
  color: var(--color-text-muted);
}

.drop-zone__title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text);
}

.drop-zone__subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 40ch;
}

.drop-zone__or {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.drop-zone__input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
}

/* File list */
.file-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.file-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.file-item__icon {
  width: 32px;
  height: 32px;
  color: var(--color-primary);
  flex-shrink: 0;
}

.file-item__info {
  flex: 1;
  min-width: 0;
}

.file-item__name {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-item__size {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.file-item__remove {
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  padding: var(--space-1);
  transition: color var(--transition-fast), background-color var(--transition-fast);
  flex-shrink: 0;
  display: flex;
}

.file-item__remove:hover {
  color: var(--color-error);
  background: color-mix(in srgb, var(--color-error) 10%, transparent);
}

/* ── Progress ────────────────────────────────────────────────── */
.progress-wrap {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.progress-bar {
  height: 8px;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar__fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  transition: width var(--transition-base);
  width: 0%;
}

.progress-status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

/* ── Result Item ─────────────────────────────────────────────── */
.result-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.result-item__thumb {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--color-bg-tertiary);
  overflow: hidden;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.result-item__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.result-item__info {
  flex: 1;
  min-width: 0;
}

.result-item__name {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.result-item__meta {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  display: flex;
  gap: var(--space-3);
}

.result-item__size-change {
  color: var(--color-success);
  font-weight: var(--font-medium);
}

/* ── Hero ────────────────────────────────────────────────────── */
.hero {
  padding-block: var(--space-20) var(--space-16);
  text-align: center;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-primary);
  background: color-mix(in srgb, var(--color-primary) 10%, transparent);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-6);
}

.hero__title {
  font-size: clamp(2rem, 5vw, var(--text-5xl));
  font-weight: var(--font-bold);
  color: var(--color-text);
  line-height: var(--leading-tight);
  letter-spacing: -0.03em;
  max-width: 18ch;
  margin-inline: auto;
  margin-bottom: var(--space-5);
}

.hero__title mark {
  background: none;
  color: var(--color-primary);
}

.hero__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 50ch;
  margin-inline: auto;
  margin-bottom: var(--space-8);
  line-height: var(--leading-relaxed);
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

/* ── Grid ────────────────────────────────────────────────────── */
.grid-tools {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

@media (min-width: 640px) { .grid-tools { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .grid-tools { grid-template-columns: repeat(3, 1fr); } }

.grid-articles {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

@media (min-width: 640px) { .grid-articles { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .grid-articles { grid-template-columns: repeat(3, 1fr); } }

/* ── Section Header ──────────────────────────────────────────── */
.section-header {
  margin-bottom: var(--space-10);
}

.section-header--centered {
  text-align: center;
}

.section-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.section-title {
  font-size: clamp(1.5rem, 3vw, var(--text-3xl));
  font-weight: var(--font-bold);
  color: var(--color-text);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.section-desc {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 55ch;
  line-height: var(--leading-relaxed);
}

.section-header--centered .section-desc {
  margin-inline: auto;
}

/* ── Feature Points ──────────────────────────────────────────── */
.feature-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 640px) { .feature-list { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .feature-list { grid-template-columns: repeat(3, 1fr); } }

.feature-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.feature-item__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--color-primary) 10%, transparent);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-item__title {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text);
}

.feature-item__desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

/* ── FAQ ─────────────────────────────────────────────────────── */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item:last-child { border-bottom: none; }

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  width: 100%;
  text-align: left;
  padding: var(--space-5) var(--space-6);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  background: var(--color-surface);
  transition: background-color var(--transition-fast);
  cursor: pointer;
}

.faq-question:hover {
  background: var(--color-bg-secondary);
}

.faq-question svg {
  flex-shrink: 0;
  color: var(--color-text-muted);
  transition: transform var(--transition-fast);
}

.faq-item.open .faq-question svg {
  transform: rotate(180deg);
}

.faq-answer {
  display: none;
  padding: 0 var(--space-6) var(--space-5);
  background: var(--color-surface);
}

.faq-item.open .faq-answer { display: block; }

.faq-answer p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

/* ── Page Hero (inner pages) ─────────────────────────────────── */
.page-hero {
  padding-block: var(--space-12) var(--space-8);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-12);
}

.page-hero__label {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.page-hero__title {
  font-size: clamp(1.75rem, 4vw, var(--text-4xl));
  font-weight: var(--font-bold);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.page-hero__desc {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 55ch;
  line-height: var(--leading-relaxed);
}

/* ── Prose (content pages) ───────────────────────────────────── */
.prose {
  max-width: 65ch;
}

.prose h2 {
  font-size: var(--text-2xl);
  margin-top: var(--space-10);
  margin-bottom: var(--space-4);
}

.prose h3 {
  font-size: var(--text-xl);
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
}

.prose p {
  margin-bottom: var(--space-5);
}

.prose ul {
  list-style: disc;
  padding-left: var(--space-6);
  margin-bottom: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.prose ul li {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.prose a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ── Alert / Callout ─────────────────────────────────────────── */
.callout {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  border-left: 3px solid;
}

.callout-info {
  background: color-mix(in srgb, var(--color-primary) 8%, transparent);
  border-color: var(--color-primary);
}

.callout-info .callout__icon { color: var(--color-primary); }

.callout__icon { flex-shrink: 0; margin-top: 2px; }

.callout__body p {
  font-size: var(--text-sm);
  margin: 0;
}

/* ── Empty State ─────────────────────────────────────────────── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  padding: var(--space-16);
  text-align: center;
}

.empty-state__icon {
  color: var(--color-text-muted);
  opacity: 0.5;
}

.empty-state__title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-secondary);
}

.empty-state__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 35ch;
}

/* ── Utility ─────────────────────────────────────────────────── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.text-center { text-align: center; }
.text-left   { text-align: left; }
.text-right  { text-align: right; }

.hidden { display: none !important; }

.divider {
  height: 1px;
  background: var(--color-border);
  margin-block: var(--space-8);
}

/* ── 404 ─────────────────────────────────────────────────────── */
.error-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  text-align: center;
  gap: var(--space-5);
  padding: var(--space-12);
}

.error-page__code {
  font-size: 8rem;
  font-weight: var(--font-bold);
  color: var(--color-border-strong);
  line-height: 1;
  letter-spacing: -0.05em;
}

.error-page__title {
  font-size: var(--text-3xl);
  color: var(--color-text);
}

.error-page__desc {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 45ch;
}

/* ── Responsive tweaks ───────────────────────────────────────── */
@media (max-width: 480px) {
  h1 { font-size: var(--text-3xl); }
  .hero__title { font-size: 2rem; }
  .btn-lg { padding: 12px var(--space-6); }
  .drop-zone { padding: var(--space-8) var(--space-4); }
}