/*
 * Isaac Perez - Design System
 * A cohesive design system for the personal brand ecosystem
 * ============================================================
 */

/* ============================================================
   CSS CUSTOM PROPERTIES (DESIGN TOKENS)
   ============================================================ */

:root {
  /* -------------------- Colors -------------------- */
  
  /* Neutral Palette */
  --color-white: #ffffff;
  --color-gray-50: #fafafa;
  --color-gray-100: #f5f5f7;
  --color-gray-200: #e8e8ed;
  --color-gray-300: #d2d2d7;
  --color-gray-400: #a1a1a6;
  --color-gray-500: #86868b;
  --color-gray-600: #6e6e73;
  --color-gray-700: #424245;
  --color-gray-800: #2d2d2d;
  --color-gray-900: #1d1d1f;
  --color-black: #000000;
  
  /* Primary Brand Color - Calm, confident blue-gray */
  --color-primary: #2d3436;
  --color-primary-light: #636e72;
  --color-primary-dark: #1e2224;
  
  /* Accent Color - Default (can be overridden per subdomain) */
  --color-accent: #0071e3;
  --color-accent-light: #40a0ff;
  --color-accent-dark: #0058b0;
  --color-accent-subtle: rgba(0, 113, 227, 0.1);
  
  /* Semantic Colors */
  --color-success: #34c759;
  --color-warning: #ff9f0a;
  --color-error: #ff3b30;
  
  /* Surface Colors */
  --color-surface: var(--color-white);
  --color-surface-elevated: var(--color-white);
  --color-surface-secondary: var(--color-gray-50);
  --color-surface-tertiary: var(--color-gray-100);
  
  /* Text Colors */
  --color-text-primary: var(--color-gray-900);
  --color-text-secondary: var(--color-gray-600);
  --color-text-tertiary: var(--color-gray-500);
  --color-text-inverse: var(--color-white);
  
  /* Border Colors */
  --color-border: var(--color-gray-200);
  --color-border-light: var(--color-gray-100);
  
  /* -------------------- Typography -------------------- */
  
  /* Font Families */
  --font-sans: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-mono: 'SF Mono', SFMono-Regular, ui-monospace, Menlo, Monaco, 'Cascadia Mono', monospace;
  
  /* Font Sizes - Fluid Scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.8125rem);      /* 12-13px */
  --text-sm: clamp(0.8125rem, 0.75rem + 0.3vw, 0.9375rem);    /* 13-15px */
  --text-base: clamp(0.9375rem, 0.875rem + 0.3vw, 1.0625rem); /* 15-17px */
  --text-lg: clamp(1.125rem, 1rem + 0.5vw, 1.3125rem);        /* 18-21px */
  --text-xl: clamp(1.3125rem, 1.1rem + 0.9vw, 1.75rem);       /* 21-28px */
  --text-2xl: clamp(1.75rem, 1.4rem + 1.5vw, 2.5rem);         /* 28-40px */
  --text-3xl: clamp(2.25rem, 1.8rem + 2vw, 3.5rem);           /* 36-56px */
  --text-4xl: clamp(2.75rem, 2rem + 3vw, 4.5rem);             /* 44-72px */
  --text-5xl: clamp(3.5rem, 2.5rem + 4vw, 6rem);              /* 56-96px */
  
  /* Font Weights */
  --font-light: 300;
  --font-regular: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  
  /* Line Heights */
  --leading-none: 1;
  --leading-tight: 1.1;
  --leading-snug: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;
  
  /* Letter Spacing */
  --tracking-tighter: -0.03em;
  --tracking-tight: -0.02em;
  --tracking-normal: 0;
  --tracking-wide: 0.02em;
  --tracking-wider: 0.05em;
  
  /* -------------------- Spacing -------------------- */
  
  --space-0: 0;
  --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-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */
  --space-32: 8rem;     /* 128px */
  --space-40: 10rem;    /* 160px */
  
  /* -------------------- Layout -------------------- */
  
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1200px;
  --container-2xl: 1440px;
  
  --grid-gap: var(--space-6);
  --section-gap: var(--space-24);
  
  /* -------------------- Borders & Radius -------------------- */
  
  --radius-none: 0;
  --radius-sm: 0.375rem;   /* 6px */
  --radius-md: 0.5rem;     /* 8px */
  --radius-lg: 0.75rem;    /* 12px */
  --radius-xl: 1rem;       /* 16px */
  --radius-2xl: 1.5rem;    /* 24px */
  --radius-3xl: 2rem;      /* 32px */
  --radius-full: 9999px;
  
  --border-width: 1px;
  --border-width-2: 2px;
  
  /* -------------------- Shadows -------------------- */
  
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1), 0 4px 8px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12), 0 8px 16px rgba(0, 0, 0, 0.06);
  --shadow-2xl: 0 24px 64px rgba(0, 0, 0, 0.16), 0 12px 24px rgba(0, 0, 0, 0.08);
  
  /* Colored shadows for buttons/cards */
  --shadow-accent: 0 4px 16px rgba(0, 113, 227, 0.2);
  
  /* -------------------- Transitions -------------------- */
  
  --ease-default: cubic-bezier(0.25, 0.1, 0.25, 1);
  --ease-in: cubic-bezier(0.42, 0, 1, 1);
  --ease-out: cubic-bezier(0, 0, 0.58, 1);
  --ease-in-out: cubic-bezier(0.42, 0, 0.58, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;
  --duration-slower: 600ms;
  
  /* -------------------- Z-Index Scale -------------------- */
  
  --z-below: -1;
  --z-base: 0;
  --z-raised: 10;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-toast: 500;
}

/* ============================================================
   DARK MODE
   ============================================================ */

/* System preference dark mode */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    /* Surface Colors */
    --color-surface: var(--color-gray-900);
    --color-surface-elevated: #2d2d2d;
    --color-surface-secondary: #1a1a1a;
    --color-surface-tertiary: var(--color-black);
    
    /* Text Colors */
    --color-text-primary: var(--color-gray-100);
    --color-text-secondary: var(--color-gray-400);
    --color-text-tertiary: var(--color-gray-500);
    
    /* Border Colors */
    --color-border: rgba(255, 255, 255, 0.1);
    --color-border-light: rgba(255, 255, 255, 0.05);
    
    /* Adjusted accent for dark mode */
    --color-accent-subtle: rgba(0, 113, 227, 0.2);
    
    /* Shadows for dark mode */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4), 0 2px 4px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5), 0 4px 8px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.5), 0 8px 16px rgba(0, 0, 0, 0.3);
    --shadow-2xl: 0 24px 64px rgba(0, 0, 0, 0.6), 0 12px 24px rgba(0, 0, 0, 0.4);
  }
}

/* Manual dark mode toggle */
:root[data-theme="dark"] {
  /* Surface Colors */
  --color-surface: var(--color-gray-900);
  --color-surface-elevated: #2d2d2d;
  --color-surface-secondary: #1a1a1a;
  --color-surface-tertiary: var(--color-black);
  
  /* Text Colors */
  --color-text-primary: var(--color-gray-100);
  --color-text-secondary: var(--color-gray-400);
  --color-text-tertiary: var(--color-gray-500);
  
  /* Border Colors */
  --color-border: rgba(255, 255, 255, 0.1);
  --color-border-light: rgba(255, 255, 255, 0.05);
  
  /* Adjusted accent for dark mode */
  --color-accent-subtle: rgba(0, 113, 227, 0.2);
  
  /* Shadows for dark mode */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4), 0 2px 4px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5), 0 4px 8px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.5), 0 8px 16px rgba(0, 0, 0, 0.3);
  --shadow-2xl: 0 24px 64px rgba(0, 0, 0, 0.6), 0 12px 24px rgba(0, 0, 0, 0.4);
}

/* ============================================================
   CSS RESET & BASE STYLES
   ============================================================ */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--font-regular);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background-color: var(--color-surface);
}

/* Focus styles for accessibility */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Remove default focus for mouse users */
:focus:not(:focus-visible) {
  outline: none;
}

/* Selection color */
::selection {
  background-color: var(--color-accent-subtle);
  color: var(--color-text-primary);
}

/* ============================================================
   TYPOGRAPHY
   ============================================================ */

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-primary);
}

.headline-1 {
  font-size: var(--text-5xl);
  font-weight: var(--font-bold);
  line-height: var(--leading-none);
  letter-spacing: var(--tracking-tighter);
}

.headline-2 {
  font-size: var(--text-4xl);
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tighter);
}

.headline-3 {
  font-size: var(--text-3xl);
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
}

.headline-4 {
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
  line-height: var(--leading-snug);
}

.headline-5 {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  line-height: var(--leading-snug);
}

.headline-6 {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  line-height: var(--leading-snug);
}

.subhead {
  font-size: var(--text-xl);
  font-weight: var(--font-regular);
  line-height: var(--leading-normal);
  color: var(--color-text-secondary);
}

.body-large {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
}

.body {
  font-size: var(--text-base);
  line-height: var(--leading-normal);
}

.body-small {
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
}

.caption {
  font-size: var(--text-xs);
  line-height: var(--leading-normal);
  color: var(--color-text-tertiary);
}

.eyebrow {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-accent);
}

/* ============================================================
   LAYOUT UTILITIES
   ============================================================ */

.container {
  width: 100%;
  max-width: var(--container-xl);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

.container-narrow {
  max-width: var(--container-md);
}

.container-wide {
  max-width: var(--container-2xl);
}

.section {
  padding-top: var(--section-gap);
  padding-bottom: var(--section-gap);
}

.section-sm {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--grid-gap);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Flexbox Utilities */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.items-start {
  align-items: flex-start;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* ============================================================
   COMPONENTS: BUTTONS
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  line-height: 1;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-default);
  -webkit-tap-highlight-color: transparent;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Primary Button */
.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-white);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-accent-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-accent);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

/* Secondary Button */
.btn-secondary {
  background-color: var(--color-gray-900);
  color: var(--color-white);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-gray-800);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* Ghost Button */
.btn-ghost {
  background-color: transparent;
  color: var(--color-accent);
  border: var(--border-width) solid var(--color-border);
}

.btn-ghost:hover:not(:disabled) {
  background-color: var(--color-gray-50);
  border-color: var(--color-gray-300);
}

/* Text Link Button */
.btn-link {
  background: none;
  padding: 0;
  color: var(--color-accent);
  border-radius: 0;
}

.btn-link:hover:not(:disabled) {
  color: var(--color-accent-dark);
}

/* Button Sizes */
.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

/* Icon Button */
.btn-icon {
  padding: var(--space-3);
  border-radius: var(--radius-lg);
}

/* ============================================================
   COMPONENTS: CARDS
   ============================================================ */

.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  transition: transform var(--duration-normal) var(--ease-default),
              box-shadow var(--duration-normal) var(--ease-default);
}

.card-elevated {
  box-shadow: var(--shadow-md);
}

.card-elevated:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.card-bordered {
  border: var(--border-width) solid var(--color-border);
}

.card-body {
  padding: var(--space-6);
}

.card-body-lg {
  padding: var(--space-8);
}

/* ============================================================
   COMPONENTS: NAVIGATION
   ============================================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  background-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: var(--border-width) solid var(--color-border-light);
  transition: background-color var(--duration-normal) var(--ease-default),
              border-color var(--duration-normal) var(--ease-default);
}

/* Dark mode nav styles */
:root[data-theme="dark"] .nav {
  background-color: rgba(29, 29, 31, 0.9);
  border-bottom-color: rgba(255, 255, 255, 0.1);
}

:root[data-theme="dark"] .nav-brand {
  color: var(--color-white);
}

:root[data-theme="dark"] .nav-link {
  color: var(--color-gray-300);
}

:root[data-theme="dark"] .nav-link:hover {
  color: var(--color-white);
}

:root[data-theme="dark"] .nav-toggle-icon,
:root[data-theme="dark"] .nav-toggle-icon::before,
:root[data-theme="dark"] .nav-toggle-icon::after {
  background-color: var(--color-white);
}

:root[data-theme="dark"] .nav-links {
  background-color: #1d1d1f;
}

/* System preference dark mode nav */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .nav {
    background-color: rgba(29, 29, 31, 0.9);
    border-bottom-color: rgba(255, 255, 255, 0.1);
  }
  
  :root:not([data-theme="light"]) .nav-brand {
    color: var(--color-white);
  }
  
  :root:not([data-theme="light"]) .nav-link {
    color: var(--color-gray-300);
  }
  
  :root:not([data-theme="light"]) .nav-link:hover {
    color: var(--color-white);
  }
  
  :root:not([data-theme="light"]) .nav-toggle-icon,
  :root:not([data-theme="light"]) .nav-toggle-icon::before,
  :root:not([data-theme="light"]) .nav-toggle-icon::after {
    background-color: var(--color-white);
  }
  
  :root:not([data-theme="light"]) .nav-links {
    background-color: #1d1d1f;
  }
}

.nav-dark {
  background-color: rgba(29, 29, 31, 0.8);
  border-bottom-color: rgba(255, 255, 255, 0.1);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.nav-brand {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  text-decoration: none;
  letter-spacing: var(--tracking-tight);
}

.nav-dark .nav-brand {
  color: var(--color-white);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-default);
}

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

.nav-dark .nav-link {
  color: var(--color-gray-400);
}

.nav-dark .nav-link:hover {
  color: var(--color-white);
}

/* Mobile Navigation */
.nav-toggle {
  display: none;
  padding: var(--space-2);
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle-icon {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text-primary);
  position: relative;
  transition: background-color var(--duration-fast);
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-text-primary);
  transition: transform var(--duration-normal) var(--ease-default);
}

.nav-toggle-icon::before {
  top: -8px;
}

.nav-toggle-icon::after {
  bottom: -8px;
}

.nav-dark .nav-toggle-icon,
.nav-dark .nav-toggle-icon::before,
.nav-dark .nav-toggle-icon::after {
  background-color: var(--color-white);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }
  
  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 0;
    padding-top: var(--space-8);
    background-color: #ffffff;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--duration-normal) var(--ease-default);
  }
  
  .nav-dark .nav-links {
    background-color: #1d1d1f;
  }
  
  .nav-links.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  
  .nav-link {
    display: block;
    padding: var(--space-4) var(--space-6);
    font-size: var(--text-lg);
  }
  
  /* Dark mode mobile nav - system preference */
  @media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .nav-links {
      background-color: #1d1d1f;
    }
  }
  
  /* Dark mode mobile nav - manual toggle */
  :root[data-theme="dark"] .nav-links {
    background-color: #1d1d1f;
  }
}

/* ============================================================
   COMPONENTS: HERO SECTIONS
   ============================================================ */

.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 64px; /* Account for fixed nav */
}

.hero-centered {
  text-align: center;
  align-items: center;
}

.hero-content {
  max-width: 800px;
}

.hero-title {
  margin-bottom: var(--space-6);
}

.hero-subtitle {
  margin-bottom: var(--space-8);
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
}

.hero-centered .hero-actions {
  justify-content: center;
}

@media (max-width: 768px) {
  .hero {
    min-height: auto;
    padding-top: calc(64px + var(--space-16));
    padding-bottom: var(--space-16);
  }
  
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-actions .btn {
    width: 100%;
  }
}

/* ============================================================
   COMPONENTS: DIVIDERS
   ============================================================ */

.divider {
  height: var(--border-width);
  background-color: var(--color-border);
  border: none;
  margin: var(--space-16) 0;
}

.divider-light {
  background-color: var(--color-border-light);
}

/* ============================================================
   COMPONENTS: BADGES / TAGS
   ============================================================ */

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  line-height: 1;
  border-radius: var(--radius-full);
  background-color: var(--color-accent-subtle);
  color: var(--color-accent);
}

.badge-neutral {
  background-color: var(--color-gray-100);
  color: var(--color-text-secondary);
}

/* ============================================================
   COMPONENTS: DEVICE FRAMES
   ============================================================ */

.device-frame {
  position: relative;
  background-color: var(--color-gray-900);
  border-radius: 44px;
  padding: 12px;
  box-shadow: var(--shadow-2xl);
}

.device-frame::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: calc(100% + 2px);
  height: calc(100% + 2px);
  background: linear-gradient(135deg, 
    rgba(255,255,255,0.1) 0%, 
    rgba(255,255,255,0.05) 50%, 
    rgba(0,0,0,0.1) 100%
  );
  border-radius: 45px;
  z-index: -1;
}

.device-screen {
  width: 100%;
  height: auto;
  border-radius: 32px;
  overflow: hidden;
}

.device-screen img {
  width: 100%;
  height: auto;
  display: block;
}

.device-frame-sm {
  border-radius: 32px;
  padding: 8px;
}

.device-frame-sm::before {
  border-radius: 33px;
}

.device-frame-sm .device-screen {
  border-radius: 24px;
}

/* ============================================================
   COMPONENTS: FOOTER
   ============================================================ */

.footer {
  background-color: var(--color-gray-900);
  color: var(--color-gray-400);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

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

.footer-tagline {
  color: var(--color-gray-500);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

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

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-3);
}

.footer-link {
  color: var(--color-gray-400);
  font-size: var(--text-sm);
  text-decoration: none;
  transition: color var(--duration-fast);
}

.footer-link:hover {
  color: var(--color-white);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-8);
  border-top: var(--border-width) solid rgba(255, 255, 255, 0.1);
}

.footer-copyright {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
}

.footer-socials {
  display: flex;
  gap: var(--space-4);
}

.footer-social {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--color-gray-400);
  background-color: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: all var(--duration-fast);
}

.footer-social:hover {
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.1);
}

.footer-social svg {
  width: 20px;
  height: 20px;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
  
  .footer-brand-col {
    grid-column: span 2;
    margin-bottom: var(--space-4);
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-6);
    text-align: center;
  }
}

/* ============================================================
   THEME TOGGLE
   ============================================================ */

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: none;
  border-radius: var(--radius-lg);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-default);
}

.theme-toggle:hover {
  background: var(--color-surface-secondary);
  color: var(--color-text-primary);
}

:root[data-theme="dark"] .theme-toggle {
  color: var(--color-gray-300);
}

:root[data-theme="dark"] .theme-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle {
    color: var(--color-gray-300);
  }
  
  :root:not([data-theme="light"]) .theme-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-white);
  }
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  transition: transform var(--duration-normal) var(--ease-default);
}

.theme-toggle:hover svg {
  transform: rotate(15deg);
}

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

/* Light mode: show moon icon (to switch to dark) */
:root:not([data-theme="dark"]) .theme-toggle .icon-moon {
  display: block;
}

:root[data-theme="dark"] .theme-toggle .icon-sun {
  display: block;
}

/* Handle system preference */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-moon {
    display: none;
  }
  :root:not([data-theme="light"]) .theme-toggle .icon-sun {
    display: block;
  }
}

/* ============================================================
   UTILITIES
   ============================================================ */

/* Text Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-tertiary { color: var(--color-text-tertiary); }
.text-accent { color: var(--color-accent); }
.text-white { color: var(--color-white); }

.font-light { font-weight: var(--font-light); }
.font-regular { font-weight: var(--font-regular); }
.font-medium { font-weight: var(--font-medium); }
.font-semibold { font-weight: var(--font-semibold); }
.font-bold { font-weight: var(--font-bold); }

/* Spacing Utilities */
.mt-0 { margin-top: 0; }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }
.mt-16 { margin-top: var(--space-16); }

.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }
.mb-16 { margin-bottom: var(--space-16); }

/* Display Utilities */
.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }

@media (max-width: 768px) {
  .hidden-mobile { display: none; }
}

@media (min-width: 769px) {
  .hidden-desktop { display: none; }
}

/* Background Utilities */
.bg-white { background-color: var(--color-white); }
.bg-gray-50 { background-color: var(--color-gray-50); }
.bg-gray-100 { background-color: var(--color-gray-100); }
.bg-gray-900 { background-color: var(--color-gray-900); }
.bg-black { background-color: var(--color-black); }

/* ============================================================
   ANIMATIONS
   ============================================================ */

/* Fade In */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Fade In Up */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Scale In */
@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Animation Classes */
.animate-fade-in {
  animation: fadeIn var(--duration-slow) var(--ease-out) forwards;
}

.animate-fade-in-up {
  animation: fadeInUp var(--duration-slow) var(--ease-out) forwards;
}

.animate-scale-in {
  animation: scaleIn var(--duration-slow) var(--ease-out) forwards;
}

/* Stagger delays */
.delay-1 { animation-delay: 100ms; }
.delay-2 { animation-delay: 200ms; }
.delay-3 { animation-delay: 300ms; }
.delay-4 { animation-delay: 400ms; }
.delay-5 { animation-delay: 500ms; }

/* Scroll-triggered animations - initially hidden */
[data-animate] {
  opacity: 0;
}

[data-animate].animated {
  opacity: 1;
}

[data-animate="fade-in"].animated {
  animation: fadeIn var(--duration-slow) var(--ease-out) forwards;
}

[data-animate="fade-in-up"].animated {
  animation: fadeInUp var(--duration-slow) var(--ease-out) forwards;
}

[data-animate="scale-in"].animated {
  animation: scaleIn var(--duration-slow) var(--ease-out) forwards;
}

/* Hover Effects */
.hover-lift {
  transition: transform var(--duration-normal) var(--ease-default);
}

.hover-lift:hover {
  transform: translateY(-4px);
}

/* ============================================================
   PRINT STYLES
   ============================================================ */

@media print {
  .nav,
  .footer-socials,
  .btn {
    display: none !important;
  }
  
  body {
    font-size: 12pt;
    color: #000;
    background: #fff;
  }
  
  a {
    color: #000;
    text-decoration: underline;
  }
}