/* Material Design 3 - Design System for AlphaSEO */
/* Based on Google's Material Design 3 guidelines */

/* ========== MD3 COLOR TOKENS ========== */
:root {
  /* Primary (Google Blue) */
  --md-primary: #4285F4;
  --md-on-primary: #FFFFFF;
  --md-primary-container: #D3E3FD;
  --md-on-primary-container: #041E49;
  
  /* Secondary (Google Green) */
  --md-secondary: #34A853;
  --md-on-secondary: #FFFFFF;
  --md-secondary-container: #C4EED0;
  --md-on-secondary-container: #002111;
  
  /* Tertiary (Google Yellow) */
  --md-tertiary: #FBBC05;
  --md-on-tertiary: #1F1F1F;
  --md-tertiary-container: #FFF0C3;
  --md-on-tertiary-container: #241A00;
  
  /* Error (Google Red) */
  --md-error: #EA4335;
  --md-on-error: #FFFFFF;
  --md-error-container: #FFDAD6;
  --md-on-error-container: #410002;
  
  /* Surface & Background */
  --md-surface: #FFFFFF;
  --md-on-surface: #1F1F1F;
  --md-surface-variant: #F1F3F4;
  --md-on-surface-variant: #5F6368;
  --md-surface-container: #F8F9FA;
  --md-surface-container-high: #ECEFF1;
  
  /* Outline */
  --md-outline: #DADCE0;
  --md-outline-variant: #E8EAED;
  
  /* ========== MD3 ELEVATION ========== */
  --md-elevation-1: 0 1px 2px rgba(0,0,0,0.08), 0 1px 3px rgba(0,0,0,0.1);
  --md-elevation-2: 0 1px 3px rgba(0,0,0,0.08), 0 4px 8px rgba(0,0,0,0.08);
  --md-elevation-3: 0 1px 3px rgba(0,0,0,0.08), 0 8px 16px rgba(0,0,0,0.08);
  --md-elevation-4: 0 2px 4px rgba(0,0,0,0.08), 0 12px 24px rgba(0,0,0,0.1);
  --md-elevation-5: 0 4px 8px rgba(0,0,0,0.08), 0 16px 32px rgba(0,0,0,0.12);
  
  /* ========== MD3 SHAPES ========== */
  --md-shape-xs: 4px;
  --md-shape-sm: 8px;
  --md-shape-md: 12px;
  --md-shape-lg: 16px;
  --md-shape-xl: 28px;
  --md-shape-full: 9999px;
  
  /* ========== MD3 TYPOGRAPHY ========== */
  --md-font-family: 'Inter', 'Google Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  /* Display */
  --md-display-large: 700 57px/64px var(--md-font-family);
  --md-display-medium: 700 45px/52px var(--md-font-family);
  --md-display-small: 600 36px/44px var(--md-font-family);
  
  /* Headline */
  --md-headline-large: 600 32px/40px var(--md-font-family);
  --md-headline-medium: 600 28px/36px var(--md-font-family);
  --md-headline-small: 600 24px/32px var(--md-font-family);
  
  /* Title */
  --md-title-large: 600 22px/28px var(--md-font-family);
  --md-title-medium: 600 16px/24px var(--md-font-family);
  --md-title-small: 500 14px/20px var(--md-font-family);
  
  /* Body */
  --md-body-large: 400 16px/24px var(--md-font-family);
  --md-body-medium: 400 14px/20px var(--md-font-family);
  --md-body-small: 400 12px/16px var(--md-font-family);
  
  /* Label */
  --md-label-large: 500 14px/20px var(--md-font-family);
  --md-label-medium: 500 12px/16px var(--md-font-family);
  --md-label-small: 500 11px/16px var(--md-font-family);
  
  /* ========== MD3 MOTION ========== */
  --md-motion-easing-standard: cubic-bezier(0.2, 0, 0, 1);
  --md-motion-easing-emphasized: cubic-bezier(0.2, 0, 0, 1);
  --md-motion-easing-decelerate: cubic-bezier(0, 0, 0, 1);
  --md-motion-easing-accelerate: cubic-bezier(0.3, 0, 1, 1);
  --md-motion-duration-short: 150ms;
  --md-motion-duration-medium: 300ms;
  --md-motion-duration-long: 500ms;
  
  /* ========== MD3 SPACING ========== */
  --md-spacing-xs: 4px;
  --md-spacing-sm: 8px;
  --md-spacing-md: 16px;
  --md-spacing-lg: 24px;
  --md-spacing-xl: 32px;
  --md-spacing-xxl: 48px;
  --md-spacing-section: 80px;
}

/* Dark Theme */
[data-theme="dark"] {
  --md-surface: #1F1F1F;
  --md-on-surface: #FFFFFF;
  --md-surface-variant: #2D2D2D;
  --md-on-surface-variant: #9AA0A6;
  --md-surface-container: #282828;
  --md-surface-container-high: #333333;
  --md-outline: #3C4043;
  --md-outline-variant: #444746;
  --md-primary-container: #004A77;
  --md-on-primary-container: #D3E3FD;
}

/* ========== MD3 BASE STYLES ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font: var(--md-body-large);
  background: var(--md-surface);
  color: var(--md-on-surface);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-overflow-scrolling: touch;
  overflow-x: hidden;
  width: 100%;
}

/* ========== MD3 TYPOGRAPHY CLASSES ========== */
.md-display-large { font: var(--md-display-large); }
.md-display-medium { font: var(--md-display-medium); }
.md-display-small { font: var(--md-display-small); }
.md-headline-large { font: var(--md-headline-large); }
.md-headline-medium { font: var(--md-headline-medium); }
.md-headline-small { font: var(--md-headline-small); }
.md-title-large { font: var(--md-title-large); }
.md-title-medium { font: var(--md-title-medium); }
.md-title-small { font: var(--md-title-small); }
.md-body-large { font: var(--md-body-large); }
.md-body-medium { font: var(--md-body-medium); }
.md-body-small { font: var(--md-body-small); }
.md-label-large { font: var(--md-label-large); }
.md-label-medium { font: var(--md-label-medium); }
.md-label-small { font: var(--md-label-small); }

/* ========== MD3 BUTTONS ========== */
.md-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: none;
  border-radius: var(--md-shape-full);
  font: var(--md-label-large);
  cursor: pointer;
  transition: all var(--md-motion-duration-short) var(--md-motion-easing-standard);
  text-decoration: none;
  white-space: nowrap;
}

.md-btn-filled {
  background: var(--md-primary);
  color: var(--md-on-primary);
  box-shadow: var(--md-elevation-1);
}
.md-btn-filled:hover {
  box-shadow: var(--md-elevation-2);
  filter: brightness(1.08);
}

.md-btn-tonal {
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
}
.md-btn-tonal:hover {
  box-shadow: var(--md-elevation-1);
  filter: brightness(0.96);
}

.md-btn-outlined {
  background: transparent;
  color: var(--md-primary);
  border: 1px solid var(--md-outline);
}
.md-btn-outlined:hover {
  background: var(--md-primary-container);
}

.md-btn-text {
  background: transparent;
  color: var(--md-primary);
  padding: 12px 16px;
}
.md-btn-text:hover {
  background: rgba(66, 133, 244, 0.08);
}

/* ========== MD3 CARDS ========== */
.md-card {
  background: var(--md-surface);
  border-radius: var(--md-shape-xl);
  padding: var(--md-spacing-lg);
  transition: all var(--md-motion-duration-medium) var(--md-motion-easing-standard);
}

.md-card-elevated {
  box-shadow: var(--md-elevation-1);
}
.md-card-elevated:hover {
  box-shadow: var(--md-elevation-3);
  transform: translateY(-4px);
}

.md-card-filled {
  background: var(--md-surface-container);
}
.md-card-filled:hover {
  background: var(--md-surface-container-high);
}

.md-card-outlined {
  border: 1px solid var(--md-outline);
}
.md-card-outlined:hover {
  border-color: var(--md-primary);
}

/* ========== MD3 TEXT FIELDS ========== */
.md-text-field {
  position: relative;
  width: 100%;
}

.md-text-field input,
.md-text-field textarea {
  width: 100%;
  padding: 16px;
  border: 1px solid var(--md-outline);
  border-radius: var(--md-shape-xs);
  background: var(--md-surface);
  color: var(--md-on-surface);
  font: var(--md-body-large);
  outline: none;
  transition: all var(--md-motion-duration-short) var(--md-motion-easing-standard);
}

.md-text-field input:focus,
.md-text-field textarea:focus {
  border-color: var(--md-primary);
  border-width: 2px;
  padding: 15px;
}

.md-text-field label {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--md-on-surface-variant);
  font: var(--md-body-large);
  pointer-events: none;
  transition: all var(--md-motion-duration-short) var(--md-motion-easing-standard);
  background: var(--md-surface);
  padding: 0 4px;
}

.md-text-field input:focus + label,
.md-text-field input:not(:placeholder-shown) + label,
.md-text-field textarea:focus + label,
.md-text-field textarea:not(:placeholder-shown) + label {
  top: 0;
  font: var(--md-body-small);
  color: var(--md-primary);
}

/* ========== MD3 NAVIGATION ========== */
.md-navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--md-surface);
  border-bottom: 1px solid var(--md-outline-variant);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  backdrop-filter: blur(20px);
}

.md-nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--md-on-surface);
}

.md-nav-logo {
  width: 40px;
  height: 40px;
  background: var(--md-primary);
  border-radius: var(--md-shape-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--md-on-primary);
  font-weight: 700;
  font-size: 20px;
}

.md-nav-title {
  font: var(--md-title-large);
}

.md-nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.md-nav-links a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--md-shape-full);
  color: var(--md-on-surface-variant);
  text-decoration: none;
  font: var(--md-label-large);
  transition: all var(--md-motion-duration-short) var(--md-motion-easing-standard);
}

.md-nav-links a:hover,
.md-nav-links a.active {
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
}

/* ========== MD3 SECTIONS ========== */
.md-section {
  padding: var(--md-spacing-section) var(--md-spacing-xl);
  max-width: 1280px;
  margin: 0 auto;
}

.md-section-header {
  text-align: center;
  margin-bottom: var(--md-spacing-xxl);
}

.md-section-label {
  display: inline-block;
  padding: 6px 16px;
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  border-radius: var(--md-shape-full);
  font: var(--md-label-large);
  margin-bottom: var(--md-spacing-md);
}

.md-section-title {
  font: var(--md-headline-large);
  color: var(--md-on-surface);
  margin-bottom: var(--md-spacing-md);
}

.md-section-subtitle {
  font: var(--md-body-large);
  color: var(--md-on-surface-variant);
  max-width: 600px;
  margin: 0 auto;
}

/* ========== MD3 HERO ========== */
.md-hero {
  padding: 120px 32px 80px;
  text-align: center;
  background: linear-gradient(180deg, var(--md-surface-container) 0%, var(--md-surface) 100%);
}

.md-hero-title {
  font: var(--md-display-medium);
  color: var(--md-on-surface);
  margin-bottom: var(--md-spacing-lg);
}

.md-hero-title em {
  color: var(--md-primary);
  font-style: normal;
}

.md-hero-subtitle {
  font: var(--md-body-large);
  color: var(--md-on-surface-variant);
  max-width: 600px;
  margin: 0 auto var(--md-spacing-xl);
}

.md-hero-actions {
  display: flex;
  gap: var(--md-spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

.md-hero-illustration {
  max-width: 500px;
  width: 100%;
  margin-top: var(--md-spacing-xxl);
  border-radius: var(--md-shape-xl);
}

/* ========== MD3 GRID LAYOUTS ========== */
.md-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--md-spacing-lg);
}

.md-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--md-spacing-lg);
}

.md-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--md-spacing-lg);
}

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

@media (max-width: 768px) {
  .md-grid-4, .md-grid-3, .md-grid-2 { grid-template-columns: 1fr; }
  .md-section { padding: 48px 16px; }
  .md-hero { padding: 80px 16px 48px; }
  .md-hero-title { font: var(--md-display-small); }
  .md-navbar { padding: 12px 16px; }
  .md-nav-links { display: none; }
}

/* ========== MD3 FOOTER ========== */
.md-footer {
  background: var(--md-surface-container);
  padding: var(--md-spacing-xxl) var(--md-spacing-xl);
  border-top: 1px solid var(--md-outline-variant);
}

.md-footer-content {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--md-spacing-xl);
  max-width: 1280px;
  margin: 0 auto;
}

.md-footer-brand p {
  font: var(--md-body-medium);
  color: var(--md-on-surface-variant);
  margin-top: var(--md-spacing-md);
}

.md-footer-links h4 {
  font: var(--md-title-small);
  color: var(--md-on-surface);
  margin-bottom: var(--md-spacing-md);
}

.md-footer-links ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--md-spacing-sm);
}

.md-footer-links a {
  font: var(--md-body-medium);
  color: var(--md-on-surface-variant);
  text-decoration: none;
  transition: color var(--md-motion-duration-short);
}

.md-footer-links a:hover {
  color: var(--md-primary);
}

.md-footer-bottom {
  text-align: center;
  padding-top: var(--md-spacing-xl);
  margin-top: var(--md-spacing-xl);
  border-top: 1px solid var(--md-outline-variant);
  font: var(--md-body-small);
  color: var(--md-on-surface-variant);
}

@media (max-width: 768px) {
  .md-footer-content { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .md-footer-content { grid-template-columns: 1fr; }
}

/* ========== MD3 SERVICE CARDS ========== */
.md-service-card {
  background: var(--md-surface);
  border-radius: var(--md-shape-xl);
  padding: var(--md-spacing-lg);
  box-shadow: var(--md-elevation-1);
  transition: all var(--md-motion-duration-medium) var(--md-motion-easing-standard);
  overflow: hidden;
}

.md-service-card:hover {
  box-shadow: var(--md-elevation-3);
  transform: translateY(-8px);
}

.md-service-illustration {
  width: 100%;
  height: 160px;
  background: var(--md-surface-container);
  border-radius: var(--md-shape-lg);
  margin-bottom: var(--md-spacing-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.md-service-illustration img {
  height: 140px;
  object-fit: contain;
}

.md-service-title {
  font: var(--md-title-large);
  color: var(--md-on-surface);
  margin-bottom: var(--md-spacing-sm);
}

.md-service-desc {
  font: var(--md-body-medium);
  color: var(--md-on-surface-variant);
}

/* ========== MD3 STATS ========== */
.md-stats {
  background: var(--md-primary);
  padding: var(--md-spacing-xxl) var(--md-spacing-xl);
}

.md-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--md-spacing-xl);
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.md-stat-value {
  font: var(--md-display-small);
  color: var(--md-on-primary);
}

.md-stat-label {
  font: var(--md-body-medium);
  color: rgba(255, 255, 255, 0.85);
}

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

/* ========== MD3 CLIENT LOGOS ========== */
.md-clients {
  display: flex;
  flex-wrap: nowrap;
  gap: var(--md-spacing-md);
  justify-content: center;
  overflow-x: auto;
  padding: var(--md-spacing-sm) 0;
}

.md-client-card {
  background: var(--md-surface);
  border-radius: var(--md-shape-lg);
  padding: var(--md-spacing-md) var(--md-spacing-lg);
  box-shadow: var(--md-elevation-1);
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 140px;
  min-height: 60px;
  transition: all var(--md-motion-duration-short) var(--md-motion-easing-standard);
}

.md-client-card:hover {
  box-shadow: var(--md-elevation-2);
  transform: translateY(-2px);
}

.md-client-card img {
  max-height: 36px;
  max-width: 100px;
  object-fit: contain;
}