/* ==========================================================================
   Clip Factory - Apple Design System
   Inspired by Apple Human Interface Guidelines, Apple Legal & WWDC Design
   Fluid physics, optical sizing, SF typography, frosted glass & restraint.
   ========================================================================== */

:root {
  /* Apple Light Mode Palette (Default) */
  --apple-bg: #fbfbfd;
  --apple-bg-subtle: #f5f5f7;
  --apple-card-bg: #ffffff;
  --apple-card-hover: #ffffff;
  --apple-nav-bg: rgba(255, 255, 255, 0.82);
  
  --apple-text: #1d1d1f;
  --apple-text-secondary: #6e6e73;
  --apple-text-tertiary: #86868b;
  --apple-text-quaternary: #a1a1a6;

  --apple-border: rgba(0, 0, 0, 0.08);
  --apple-border-strong: rgba(0, 0, 0, 0.15);
  --apple-divider: rgba(0, 0, 0, 0.06);

  --apple-blue: #0071e3;
  --apple-blue-hover: #0077ed;
  --apple-blue-active: #0068d1;
  --apple-blue-subtle: rgba(0, 113, 227, 0.08);
  
  --apple-green: #34c759;
  --apple-orange: #ff9500;
  --apple-red: #ff3b30;

  --apple-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --apple-shadow-md: 0 8px 24px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
  --apple-shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.08), 0 2px 6px rgba(0, 0, 0, 0.04);
  --apple-shadow-focus: 0 0 0 4px rgba(0, 113, 227, 0.35);

  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --radius-xl: 28px;
  --radius-pill: 980px;

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  /* Apple WWDC Fluid Spring transitions (damping 1.0, critically damped) */
  --spring-snappy: 0.28s cubic-bezier(0.16, 1, 0.3, 1);
  --spring-gentle: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --spring-press: 0.12s cubic-bezier(0.2, 0, 0, 1);
}

/* Dark Mode (Explicit or System Preferred) */
[data-theme="dark"],
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --apple-bg: #000000;
    --apple-bg-subtle: #161617;
    --apple-card-bg: #1c1c1e;
    --apple-card-hover: #242426;
    --apple-nav-bg: rgba(22, 22, 23, 0.82);

    --apple-text: #f5f5f7;
    --apple-text-secondary: #a1a1a6;
    --apple-text-tertiary: #86868b;
    --apple-text-quaternary: #636366;

    --apple-border: rgba(255, 255, 255, 0.12);
    --apple-border-strong: rgba(255, 255, 255, 0.22);
    --apple-divider: rgba(255, 255, 255, 0.08);

    --apple-blue: #2997ff;
    --apple-blue-hover: #47a7ff;
    --apple-blue-active: #1987ee;
    --apple-blue-subtle: rgba(41, 151, 255, 0.12);

    --apple-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
    --apple-shadow-md: 0 10px 30px rgba(0, 0, 0, 0.5);
    --apple-shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.7);
  }
}

[data-theme="dark"] {
  --apple-bg: #000000;
  --apple-bg-subtle: #161617;
  --apple-card-bg: #1c1c1e;
  --apple-card-hover: #242426;
  --apple-nav-bg: rgba(22, 22, 23, 0.82);

  --apple-text: #f5f5f7;
  --apple-text-secondary: #a1a1a6;
  --apple-text-tertiary: #86868b;
  --apple-text-quaternary: #636366;

  --apple-border: rgba(255, 255, 255, 0.12);
  --apple-border-strong: rgba(255, 255, 255, 0.22);
  --apple-divider: rgba(255, 255, 255, 0.08);

  --apple-blue: #2997ff;
  --apple-blue-hover: #47a7ff;
  --apple-blue-active: #1987ee;
  --apple-blue-subtle: rgba(41, 151, 255, 0.12);

  --apple-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --apple-shadow-md: 0 10px 30px rgba(0, 0, 0, 0.5);
  --apple-shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.7);
}

/* Base Reset & Typography */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html {
  font-family: var(--font-family);
  font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
  background-color: var(--apple-bg);
  color: var(--apple-text);
  line-height: 1.5;
  scroll-behavior: smooth;
  font-size: 16px;
  letter-spacing: -0.011em;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--apple-bg);
  color: var(--apple-text);
  transition: background-color var(--spring-gentle), color var(--spring-gentle);
}

.container {
  width: 100%;
  max-width: 1024px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   Apple Navigation Bar (Compact, Frosted Glass)
   ========================================================================== */

.apple-nav {
  position: sticky;
  top: 0;
  z-index: 999;
  height: 52px;
  background: var(--apple-nav-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--apple-border);
  transition: background-color var(--spring-gentle), border-color var(--spring-gentle);
}

.apple-nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.apple-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--apple-text);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: -0.015em;
  transition: opacity var(--spring-press);
}

.apple-brand:active {
  opacity: 0.65;
}

.apple-brand-icon {
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.apple-brand-icon svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.apple-brand-badge {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--apple-text-tertiary);
  margin-left: 2px;
}

.apple-nav-menu {
  display: flex;
  align-items: center;
  gap: 22px;
}

.apple-nav-link {
  font-size: 0.82rem;
  color: var(--apple-text-secondary);
  text-decoration: none;
  font-weight: 400;
  letter-spacing: -0.01em;
  transition: color var(--spring-snappy), opacity var(--spring-press);
  padding: 4px 0;
}

.apple-nav-link:hover {
  color: var(--apple-text);
}

.apple-nav-link.active {
  color: var(--apple-text);
  font-weight: 500;
}

.apple-nav-link:active {
  opacity: 0.6;
}

/* Apple Segmented Controls (iOS / macOS style) */
.apple-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

.apple-segmented-group {
  display: inline-flex;
  align-items: center;
  background: var(--apple-bg-subtle);
  border: 1px solid var(--apple-border);
  padding: 2px;
  border-radius: var(--radius-pill);
}

.apple-segmented-btn {
  background: transparent;
  border: none;
  color: var(--apple-text-secondary);
  font-size: 0.76rem;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all var(--spring-press);
  font-family: inherit;
}

.apple-segmented-btn.active {
  background: var(--apple-card-bg);
  color: var(--apple-text);
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.apple-segmented-btn:active {
  transform: scale(0.96);
}

/* Theme Toggle Button */
.apple-icon-btn {
  background: transparent;
  border: 1px solid var(--apple-border);
  color: var(--apple-text);
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color var(--spring-snappy), transform var(--spring-press);
}

.apple-icon-btn:hover {
  background: var(--apple-bg-subtle);
}

.apple-icon-btn:active {
  transform: scale(0.92);
}

.apple-icon-btn svg {
  width: 15px;
  height: 15px;
  fill: currentColor;
}

/* ==========================================================================
   Hero Section (Apple Typography & Spacing)
   ========================================================================== */

.apple-hero {
  padding: 80px 0 50px;
  text-align: center;
}

.apple-eyebrow {
  display: inline-block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--apple-blue);
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}

.apple-title-large {
  font-size: 3.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.08;
  color: var(--apple-text);
  margin-bottom: 16px;
  max-width: 860px;
  margin-left: auto;
  margin-right: auto;
}

.apple-subtitle {
  font-size: 1.3rem;
  line-height: 1.45;
  color: var(--apple-text-secondary);
  font-weight: 400;
  letter-spacing: -0.015em;
  max-width: 660px;
  margin: 0 auto 48px;
}

/* ==========================================================================
   The Two Main Action Cards (Apple Bento Cards)
   ========================================================================== */

.apple-bento-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 48px;
}

.apple-card {
  background: var(--apple-card-bg);
  border: 1px solid var(--apple-border);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  text-align: left;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--apple-shadow-sm);
  transition: transform var(--spring-snappy), box-shadow var(--spring-snappy), border-color var(--spring-snappy);
  position: relative;
  overflow: hidden;
}

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

.apple-card-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--apple-text-tertiary);
  margin-bottom: 16px;
}

.apple-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--apple-bg-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--apple-text);
}

.apple-card-icon svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

.apple-card-title {
  font-size: 1.65rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--apple-text);
  margin-bottom: 12px;
}

.apple-card-desc {
  font-size: 0.98rem;
  line-height: 1.55;
  color: var(--apple-text-secondary);
  margin-bottom: 28px;
}

.apple-feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 36px;
}

.apple-feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--apple-text-secondary);
}

.apple-feature-item svg {
  width: 16px;
  height: 16px;
  color: var(--apple-blue);
  flex-shrink: 0;
}

/* ==========================================================================
   Apple Buttons (Pill, Tactile, No Latency)
   ========================================================================== */

.apple-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--spring-press);
  letter-spacing: -0.01em;
  user-select: none;
}

/* Kill input latency: respond immediately on press */
.apple-btn:active {
  transform: scale(0.975);
}

.apple-btn-primary {
  background-color: var(--apple-blue);
  color: #ffffff;
}

.apple-btn-primary:hover {
  background-color: var(--apple-blue-hover);
}

.apple-btn-primary:active {
  background-color: var(--apple-blue-active);
}

.apple-btn-secondary {
  background-color: var(--apple-bg-subtle);
  color: var(--apple-text);
  border-color: var(--apple-border);
}

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

.apple-btn-secondary:active {
  background-color: var(--apple-bg-subtle);
}

.apple-btn-link {
  background: transparent;
  color: var(--apple-blue);
  padding: 0;
  font-size: 0.95rem;
}

.apple-btn-link:hover {
  text-decoration: underline;
}

.apple-btn-link:active {
  opacity: 0.7;
}

/* ==========================================================================
   Apple Banner / Secondary Strip
   ========================================================================== */

.apple-banner-card {
  background: var(--apple-bg-subtle);
  border: 1px solid var(--apple-border);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  margin-bottom: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.apple-banner-text h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--apple-text);
  margin-bottom: 4px;
}

.apple-banner-text p {
  font-size: 0.9rem;
  color: var(--apple-text-secondary);
  line-height: 1.5;
}

.apple-platform-tags {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.apple-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  background: var(--apple-card-bg);
  border: 1px solid var(--apple-border);
  color: var(--apple-text-secondary);
}

.apple-tag svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
  flex-shrink: 0;
}

.apple-callout-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: var(--radius-xs);
  background: var(--apple-card-bg);
  border: 1px solid var(--apple-border);
  margin-right: 6px;
  flex-shrink: 0;
}

.apple-callout-icon svg {
  width: 13px;
  height: 13px;
  fill: currentColor;
}

/* ==========================================================================
   Apple 3-Pillar Grid
   ========================================================================== */

.apple-section {
  padding: 40px 0 80px;
}

.apple-section-header {
  text-align: center;
  margin-bottom: 48px;
}

.apple-section-title {
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--apple-text);
  margin-bottom: 10px;
}

.apple-section-desc {
  font-size: 1.05rem;
  color: var(--apple-text-secondary);
  max-width: 580px;
  margin: 0 auto;
}

.apple-pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.apple-pillar-card {
  background: var(--apple-card-bg);
  border: 1px solid var(--apple-border);
  border-radius: var(--radius-md);
  padding: 30px 24px;
  transition: transform var(--spring-snappy), border-color var(--spring-snappy);
}

.apple-pillar-card:hover {
  transform: translateY(-2px);
  border-color: var(--apple-border-strong);
}

.apple-pillar-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: var(--apple-blue-subtle);
  color: var(--apple-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.apple-pillar-icon svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.apple-pillar-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin-bottom: 8px;
  color: var(--apple-text);
}

.apple-pillar-card p {
  font-size: 0.9rem;
  color: var(--apple-text-secondary);
  line-height: 1.55;
}

/* ==========================================================================
   Apple Legal Document Pages (terms.html & privacy.html)
   Clean, pristine, editorial layout
   ========================================================================== */

.apple-doc-header {
  padding: 60px 0 35px;
  border-bottom: 1px solid var(--apple-border);
  margin-bottom: 40px;
}

.apple-back-nav {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  color: var(--apple-blue);
  text-decoration: none;
  font-weight: 500;
  margin-bottom: 20px;
  transition: opacity var(--spring-press);
}

.apple-back-nav:hover {
  text-decoration: underline;
}

.apple-back-nav:active {
  opacity: 0.6;
}

.apple-back-nav svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

.apple-doc-meta {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--apple-text-tertiary);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.apple-doc-title {
  font-size: 2.8rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--apple-text);
  line-height: 1.12;
  margin-bottom: 16px;
}

.apple-doc-lead {
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--apple-text-secondary);
  max-width: 780px;
}

/* Legal Layout (Sidebar + Reading Area) */
.apple-doc-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 56px;
  padding-bottom: 100px;
}

.apple-doc-sidebar {
  position: sticky;
  top: 76px;
  height: fit-content;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
}

.apple-sidebar-title {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--apple-text-tertiary);
  margin-bottom: 14px;
}

.apple-sidebar-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.apple-sidebar-link {
  display: block;
  font-size: 0.86rem;
  color: var(--apple-text-secondary);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: all var(--spring-snappy);
  line-height: 1.4;
}

.apple-sidebar-link:hover {
  color: var(--apple-text);
  background: var(--apple-bg-subtle);
}

.apple-sidebar-link.active {
  color: var(--apple-blue);
  background: var(--apple-blue-subtle);
  font-weight: 600;
}

.apple-sidebar-link:active {
  transform: scale(0.98);
}

/* Document Body Content */
.apple-doc-body {
  max-width: 720px;
}

.apple-doc-section {
  margin-bottom: 48px;
  scroll-margin-top: 80px;
}

.apple-doc-section h2 {
  font-size: 1.45rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--apple-text);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--apple-divider);
  display: flex;
  align-items: center;
  gap: 10px;
}

.apple-section-index {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--apple-blue);
  background: var(--apple-blue-subtle);
  padding: 2px 7px;
  border-radius: var(--radius-xs);
}

.apple-doc-section p {
  font-size: 1.02rem;
  line-height: 1.7;
  color: var(--apple-text);
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.apple-doc-section ul,
.apple-doc-section ol {
  margin: 12px 0 20px 20px;
  color: var(--apple-text);
}

.apple-doc-section li {
  font-size: 0.98rem;
  line-height: 1.68;
  margin-bottom: 8px;
}

.apple-doc-section a {
  color: var(--apple-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--spring-press);
}

.apple-doc-section a:hover {
  color: var(--apple-blue-hover);
}

/* Apple Callout Boxes (macOS Alert Style) */
.apple-callout {
  background: var(--apple-bg-subtle);
  border: 1px solid var(--apple-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 24px 0;
}

.apple-callout-title {
  font-size: 0.96rem;
  font-weight: 600;
  color: var(--apple-text);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.apple-callout-text {
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--apple-text-secondary);
}

.apple-callout-text a {
  color: var(--apple-blue);
}

/* Apple Data Table */
.apple-table-card {
  border: 1px solid var(--apple-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin: 24px 0;
  background: var(--apple-card-bg);
}

.apple-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  text-align: left;
}

.apple-table th {
  background: var(--apple-bg-subtle);
  padding: 12px 18px;
  font-weight: 600;
  color: var(--apple-text);
  border-bottom: 1px solid var(--apple-border);
}

.apple-table td {
  padding: 14px 18px;
  color: var(--apple-text-secondary);
  border-bottom: 1px solid var(--apple-divider);
  line-height: 1.5;
}

.apple-table tr:last-child td {
  border-bottom: none;
}

/* ==========================================================================
   Apple Footer (Minimalist, Apple.com Legal style)
   ========================================================================== */

.apple-footer {
  margin-top: auto;
  background: var(--apple-bg-subtle);
  border-top: 1px solid var(--apple-border);
  padding: 36px 0 28px;
  font-size: 0.78rem;
  color: var(--apple-text-tertiary);
  line-height: 1.6;
}

.apple-footer-disclaimer {
  padding-bottom: 18px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--apple-border);
}

.apple-footer-disclaimer a {
  color: var(--apple-blue);
  text-decoration: underline;
}

.apple-footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.apple-footer-links {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.apple-footer-links a {
  color: var(--apple-text-secondary);
  text-decoration: none;
  transition: color var(--spring-press);
}

.apple-footer-links a:hover {
  color: var(--apple-text);
  text-decoration: underline;
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */

@media (max-width: 860px) {
  .apple-title-large {
    font-size: 2.6rem;
  }
  .apple-bento-grid {
    grid-template-columns: 1fr;
  }
  .apple-pillars-grid {
    grid-template-columns: 1fr;
  }
  .apple-doc-layout {
    grid-template-columns: 1fr;
  }
  .apple-doc-sidebar {
    position: relative;
    top: 0;
    max-height: none;
    margin-bottom: 24px;
    background: var(--apple-bg-subtle);
    padding: 16px;
    border-radius: var(--radius-md);
  }
  .apple-nav-menu {
    display: none;
  }
}

@media (max-width: 580px) {
  .apple-title-large {
    font-size: 2.1rem;
  }
  .apple-subtitle {
    font-size: 1.05rem;
  }
  .apple-card {
    padding: 28px 24px;
  }
}