/* ============================================
   AIDM Website - Global Styles
   ============================================ */

/* --- CSS Variables --- */
:root {
  /* Colors */
  --color-primary: #00D4FF;
  --color-primary-dark: #00A8CC;
  --color-primary-light: #33DDFF;
  --color-primary-glow: rgba(0, 212, 255, 0.15);
  --color-primary-glow-strong: rgba(0, 212, 255, 0.3);

  --color-bg: #0a0e17;
  --color-bg-secondary: #0f1520;
  --color-bg-card: #111827;
  --color-bg-card-hover: #162032;
  --color-bg-input: #0d1220;

  --color-border: #1e293b;
  --color-border-light: #2a3a52;
  --color-border-focus: #00D4FF;

  --color-text: #e2e8f0;
  --color-text-secondary: #94a3b8;
  --color-text-muted: #64748b;
  --color-text-heading: #f1f5f9;

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

  --color-gradient-start: #00D4FF;
  --color-gradient-end: #7c3aed;

  /* Typography */
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;

  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3.5rem;
  --font-size-6xl: 4.5rem;

  --line-height-tight: 1.15;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.75;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.2);
  --shadow-glow-strong: 0 0 40px rgba(0, 212, 255, 0.3);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Layout */
  --nav-height: 72px;
  --max-width: 1200px;
  --max-width-narrow: 800px;
}

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

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

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-text-heading);
  line-height: var(--line-height-tight);
  font-weight: 700;
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }

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

a:hover {
  color: var(--color-primary-light);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  list-style: none;
}

input, button, textarea, select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  outline: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

::selection {
  background: var(--color-primary-glow-strong);
  color: var(--color-text-heading);
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--color-border-light);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

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

/* ============================================
   Navigation
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  background: rgba(10, 14, 23, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base), background var(--transition-base);
}

.navbar.scrolled {
  border-bottom-color: var(--color-border);
  background: rgba(10, 14, 23, 0.92);
}

.navbar .container {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.navbar__logo {
  position: absolute;
  left: 0;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text-heading);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.navbar__logo:hover {
  color: var(--color-primary);
}

.navbar__logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-gradient-end));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: var(--font-size-sm);
  color: #fff;
  letter-spacing: -0.05em;
}

.navbar__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.navbar__link {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

.navbar__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-base);
  border-radius: var(--radius-full);
}

.navbar__link:hover,
.navbar__link.active {
  color: var(--color-text-heading);
}

.navbar__link:hover::after,
.navbar__link.active::after {
  width: 100%;
}

.navbar__actions {
  position: absolute;
  right: 0;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Mobile Menu Toggle */
.navbar__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  height: 28px;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  z-index: 1001;
}

.navbar__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  transform-origin: center;
}

.navbar__toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.navbar__toggle.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.navbar__toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Menu */
.navbar__mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 14, 23, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  z-index: 999;
  opacity: 0;
  transform: translateY(-10px);
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.navbar__mobile-menu.open {
  display: flex;
  opacity: 1;
  transform: translateY(0);
}

.navbar__mobile-menu .navbar__link {
  font-size: var(--font-size-xl);
}

/* ============================================
   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-body);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  white-space: nowrap;
  cursor: pointer;
  border: none;
  line-height: 1.5;
}

.btn--primary {
  background: var(--color-primary);
  color: #000;
}

.btn--primary:hover {
  background: var(--color-primary-light);
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
  color: #000;
}

.btn--primary:active {
  transform: translateY(0);
}

.btn--secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border-light);
}

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

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

.btn--ghost:hover {
  color: var(--color-primary);
  background: var(--color-primary-glow);
}

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

.btn--small {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-xs);
}

.btn--full {
  width: 100%;
}

.btn--icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-md);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

.btn--loading {
  position: relative;
  color: transparent !important;
  pointer-events: none;
}

.btn--loading::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.btn--primary.btn--loading::after {
  border-top-color: #000;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ============================================
   Cards
   ============================================ */
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--transition-base);
}

.card:hover {
  border-color: var(--color-border-light);
  background: var(--color-bg-card-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
  background: var(--color-primary-glow);
  color: var(--color-primary);
}

.card__icon svg {
  width: 24px;
  height: 24px;
}

.card__title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-3);
}

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

/* ============================================
   Form Elements
   ============================================ */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.form-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: var(--font-size-base);
  transition: all var(--transition-fast);
}

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

.form-input:focus {
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
  background: var(--color-bg);
}

.form-input--error {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

.form-error {
  font-size: var(--font-size-xs);
  color: var(--color-error);
  margin-top: var(--space-1);
  display: none;
}

.form-error.visible {
  display: block;
}

.form-input-group {
  display: flex;
  gap: var(--space-3);
}

.form-input-group .form-input {
  flex: 1;
}

.form-hint {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

/* ============================================
   Section Styles
   ============================================ */
.section {
  padding: var(--space-24) 0;
}

.section--alt {
  background: var(--color-bg-secondary);
}

.section__header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto var(--space-16);
}

.section__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary-glow);
  color: var(--color-primary);
  font-size: var(--font-size-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  border: 1px solid rgba(0, 212, 255, 0.2);
  margin-bottom: var(--space-5);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.section__title {
  margin-bottom: var(--space-4);
}

.section__description {
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
}

/* ============================================
   Grid
   ============================================ */
.grid {
  display: grid;
  gap: var(--space-8);
}

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

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

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

/* ============================================
   Hero Section
   ============================================ */
.hero {
  padding-top: calc(var(--nav-height) + var(--space-24));
  padding-bottom: var(--space-24);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(124, 58, 237, 0.06) 0%, transparent 50%),
              radial-gradient(ellipse at 80% 50%, rgba(0, 212, 255, 0.06) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  background: var(--color-primary-glow);
  color: var(--color-primary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border-radius: var(--radius-full);
  border: 1px solid rgba(0, 212, 255, 0.2);
  margin-bottom: var(--space-8);
  animation: fadeInUp 0.6s ease forwards;
}

.hero__badge svg {
  width: 16px;
  height: 16px;
}

.hero__title {
  font-size: var(--font-size-6xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-6);
  animation: fadeInUp 0.6s ease 0.1s forwards;
  opacity: 0;
  background: linear-gradient(135deg, var(--color-text-heading) 0%, var(--color-primary) 50%, var(--color-text-heading) 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: fadeInUp 0.6s ease 0.1s forwards, shimmer 6s ease-in-out infinite;
  background-size: 200% auto;
}

@keyframes shimmer {
  0%, 100% { background-position: 0% center; }
  50% { background-position: 200% center; }
}

.hero__description {
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto var(--space-10);
  line-height: var(--line-height-relaxed);
  animation: fadeInUp 0.6s ease 0.2s forwards;
  opacity: 0;
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  margin-bottom: var(--space-16);
  animation: fadeInUp 0.6s ease 0.3s forwards;
  opacity: 0;
}

.hero__visual {
  animation: fadeInUp 0.8s ease 0.4s forwards;
  opacity: 0;
}

/* ============================================
   Stats Section
   ============================================ */
.stats {
  padding: var(--space-16) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg-secondary);
}

.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
  text-align: center;
}

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

.stats__number {
  font-family: var(--font-heading);
  font-size: var(--font-size-4xl);
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
  letter-spacing: -0.02em;
}

.stats__label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* ============================================
   Workflow Steps
   ============================================ */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  position: relative;
}

.steps::before {
  content: '';
  position: absolute;
  top: 48px;
  left: calc(16.66% + 24px);
  right: calc(16.66% + 24px);
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-gradient-end));
  opacity: 0.3;
}

.step {
  text-align: center;
  position: relative;
}

.step__number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-bg-card);
  border: 2px solid var(--color-primary);
  margin: 0 auto var(--space-5);
  position: relative;
  z-index: 1;
}

.step__title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-3);
}

.step__description {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  max-width: 280px;
  margin: 0 auto;
}

/* ============================================
   CTA Section
   ============================================ */
.cta {
  padding: var(--space-24) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  bottom: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.cta .container {
  position: relative;
  z-index: 1;
}

.cta__title {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--space-5);
}

.cta__description {
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
  max-width: 500px;
  margin: 0 auto var(--space-8);
}

.cta__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
}

/* ============================================
   Footer
   ============================================ */
.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-12) 0;
  background: var(--color-bg-secondary);
}

.footer__content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer__left {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.footer__logo {
  font-family: var(--font-heading);
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text-heading);
}

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

.footer__links {
  display: flex;
  gap: var(--space-6);
}

.footer__link {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--color-primary);
}

/* ============================================
   Auth Pages (Login / Register)
   ============================================ */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-4);
  padding-top: calc(var(--nav-height) + var(--space-8));
  position: relative;
}

.auth-page::before {
  content: '';
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.auth-card {
  width: 100%;
  max-width: 440px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-10);
  position: relative;
  z-index: 1;
  box-shadow: var(--shadow-xl);
}

.auth-card__header {
  text-align: center;
  margin-bottom: var(--space-8);
}

.auth-card__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text-heading);
  margin-bottom: var(--space-4);
  text-decoration: none;
}

.auth-card__logo:hover {
  color: var(--color-primary);
}

.auth-card__title {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-2);
}

.auth-card__subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.auth-card__divider {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin: var(--space-6) 0;
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
}

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

.auth-card__oauth {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.auth-card__oauth-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3);
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.auth-card__oauth-btn:hover {
  border-color: var(--color-border-light);
  background: var(--color-bg-card-hover);
}

.auth-card__oauth-btn svg {
  width: 20px;
  height: 20px;
}

.auth-card__footer {
  text-align: center;
  margin-top: var(--space-6);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.auth-card__footer a {
  color: var(--color-primary);
  font-weight: 500;
}

.auth-card__footer a:hover {
  text-decoration: underline;
}

.auth-card__forgot {
  display: block;
  text-align: right;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: calc(var(--space-1) * -1);
  margin-bottom: var(--space-5);
  transition: color var(--transition-fast);
}

.auth-card__forgot:hover {
  color: var(--color-primary);
}

/* ============================================
   Navbar User Avatar & Dropdown
   ============================================ */
.navbar__user {
  position: relative;
}

.navbar__user-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-primary), var(--color-gradient-end));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-sm);
  color: #fff;
  cursor: pointer;
  transition: all var(--transition-base);
  overflow: hidden;
  border: 2px solid transparent;
}

.navbar__user-avatar:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
  transform: scale(1.05);
}

.navbar__user-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.navbar__user-avatar--small {
  width: 28px;
  height: 28px;
  font-size: var(--font-size-xs);
}

.navbar__user-dropdown {
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 0;
  width: 240px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--space-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-base);
  z-index: 1001;
  margin-top: var(--space-1);
}

.navbar__user-dropdown.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.navbar__user-dropdown-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
}

.navbar__user-dropdown-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-primary), var(--color-gradient-end));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-base);
  color: #fff;
  flex-shrink: 0;
  overflow: hidden;
}

.navbar__user-dropdown-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.navbar__user-dropdown-info {
  min-width: 0;
}

.navbar__user-dropdown-name {
  font-weight: 600;
  font-size: var(--font-size-sm);
  color: var(--color-text-heading);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.navbar__user-dropdown-email {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.navbar__user-dropdown-divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--space-2) 0;
}

.navbar__user-dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  cursor: pointer;
  width: 100%;
  border: none;
  background: none;
  text-align: left;
  font-family: var(--font-body);
  text-decoration: none;
}

.navbar__user-dropdown-item:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-text);
}

.navbar__user-dropdown-item svg {
  flex-shrink: 0;
  color: var(--color-text-muted);
}

.navbar__user-dropdown-item:hover svg {
  color: var(--color-text-secondary);
}

.navbar__user-dropdown-item--danger:hover {
  background: rgba(239, 68, 68, 0.1);
  color: var(--color-error);
}

.navbar__user-dropdown-item--danger:hover svg {
  color: var(--color-error);
}

.navbar__mobile-user {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-4);
}

.navbar__mobile-user-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text-heading);
  font-weight: 600;
  font-size: var(--font-size-lg);
  text-decoration: none;
}

.navbar__mobile-menu-item {
  display: block;
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  text-decoration: none;
  border: none;
  background: none;
  cursor: pointer;
  font-family: var(--font-body);
  transition: color var(--transition-fast);
}

.navbar__mobile-menu-item:hover {
  color: var(--color-primary);
}

.navbar__mobile-menu-item--danger {
  color: var(--color-error);
}

.navbar__mobile-menu-item--danger:hover {
  color: var(--color-error);
}

/* ============================================
   Profile Page
   ============================================ */
.profile-page {
  padding-top: var(--nav-height);
  min-height: 100vh;
  position: relative;
}

.profile-page::before {
  content: '';
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.profile-layout {
  display: flex;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-8) var(--space-6);
  gap: var(--space-8);
  position: relative;
  z-index: 1;
}

.profile-sidebar {
  width: 260px;
  flex-shrink: 0;
  position: sticky;
  top: calc(var(--nav-height) + var(--space-4));
  height: fit-content;
}

.profile-sidebar__card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  text-align: center;
}

.profile-sidebar__avatar-wrapper {
  position: relative;
  display: inline-block;
  margin-bottom: var(--space-5);
}

.profile-sidebar__avatar {
  width: 96px;
  height: 96px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-primary), var(--color-gradient-end));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: var(--font-size-3xl);
  color: #fff;
  overflow: hidden;
  border: 3px solid var(--color-border);
  transition: border-color var(--transition-base);
}

.profile-sidebar__avatar:hover {
  border-color: var(--color-primary);
}

.profile-sidebar__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.profile-sidebar__name {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-1);
  color: var(--color-text-heading);
}

.profile-sidebar__email {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
}

.profile-sidebar__stats {
  display: flex;
  justify-content: center;
  gap: var(--space-6);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
}

.profile-sidebar__stat {
  text-align: center;
}

.profile-sidebar__stat-value {
  font-family: var(--font-heading);
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-primary);
}

.profile-sidebar__stat-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.profile-sidebar__nav {
  margin-top: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.profile-sidebar__nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  font-family: var(--font-body);
  text-decoration: none;
}

.profile-sidebar__nav-item:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.04);
}

.profile-sidebar__nav-item.active {
  color: var(--color-primary);
  background: var(--color-primary-glow);
}

.profile-sidebar__nav-item svg {
  flex-shrink: 0;
}

.profile-content {
  flex: 1;
  min-width: 0;
  max-width: 800px;
}

.profile-section {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  margin-bottom: var(--space-6);
}

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

.profile-section__title {
  font-size: var(--font-size-xl);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.profile-section__title svg {
  color: var(--color-primary);
}

.profile-section__action {
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  cursor: pointer;
  background: none;
  border: none;
  font-family: var(--font-body);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.profile-section__action:hover {
  color: var(--color-primary-light);
}

.profile-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.profile-info__row {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}

.profile-info__label {
  width: 100px;
  flex-shrink: 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  padding-top: var(--space-2);
}

.profile-info__value {
  flex: 1;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  padding: var(--space-2) 0;
}

.profile-info__value--editable {
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  transition: all var(--transition-fast);
}

.profile-info__value--editable:focus-within {
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.profile-info__value--editable input {
  width: 100%;
  background: transparent;
  border: none;
  color: var(--color-text);
  font-size: var(--font-size-sm);
  outline: none;
}

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

.profile-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.profile-form__actions {
  display: flex;
  gap: var(--space-3);
  justify-content: flex-end;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.profile-token {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-3);
  transition: all var(--transition-fast);
}

.profile-token:hover {
  border-color: var(--color-border-light);
}

.profile-token__info {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-width: 0;
  flex: 1;
}

.profile-token__icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--color-primary-glow);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.profile-token__name {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-heading);
  margin-bottom: 2px;
}

.profile-token__key {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  font-family: 'SF Mono', 'Fira Code', Consolas, monospace;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 300px;
}

.profile-token__actions {
  display: flex;
  gap: var(--space-2);
  flex-shrink: 0;
}

.profile-token__btn {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.profile-token__btn:hover {
  border-color: var(--color-border-light);
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.04);
}

.profile-token__btn--danger:hover {
  border-color: var(--color-error);
  color: var(--color-error);
  background: rgba(239, 68, 68, 0.1);
}

.profile-empty {
  text-align: center;
  padding: var(--space-10) 0;
  color: var(--color-text-muted);
}

.profile-empty__icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-4);
  opacity: 0.5;
}

.profile-empty__text {
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-5);
}

/* ============================================
   Alert / Toast
   ============================================ */
.alert {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-5);
  display: none;
  align-items: center;
  gap: var(--space-2);
}

.alert.visible {
  display: flex;
}

.alert--error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: var(--color-error);
}

.alert--success {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--color-success);
}

.alert--info {
  background: var(--color-primary-glow);
  border: 1px solid rgba(0, 212, 255, 0.3);
  color: var(--color-primary);
}

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

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* Scroll reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal--delay-1 { transition-delay: 0.1s; }
.reveal--delay-2 { transition-delay: 0.2s; }
.reveal--delay-3 { transition-delay: 0.3s; }
.reveal--delay-4 { transition-delay: 0.4s; }

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
  :root {
    --font-size-6xl: 3.5rem;
    --font-size-5xl: 2.75rem;
    --font-size-4xl: 2rem;
  }

  .grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .steps::before {
    display: none;
  }

  .steps {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
  }

  .step {
    padding: var(--space-6) 0;
  }

  .step:not(:last-child)::after {
    content: '';
    display: block;
    width: 2px;
    height: var(--space-6);
    background: linear-gradient(to bottom, var(--color-primary), transparent);
    margin: var(--space-4) auto 0;
    opacity: 0.3;
  }
}

@media (max-width: 768px) {
  :root {
    --font-size-6xl: 2.5rem;
    --font-size-5xl: 2rem;
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.5rem;
    --nav-height: 64px;
  }

  .navbar__links {
    display: none;
  }

  .navbar__actions .btn--secondary {
    display: none;
  }

  .navbar__toggle {
    display: flex;
  }

  .hero__actions {
    flex-direction: column;
    gap: var(--space-3);
  }

  .hero__actions .btn {
    width: 100%;
    max-width: 280px;
  }

  .section {
    padding: var(--space-16) 0;
  }

  .section__header {
    margin-bottom: var(--space-10);
  }

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

  .stats__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }

  .stats__number {
    font-size: var(--font-size-2xl);
  }

  .cta__actions {
    flex-direction: column;
    gap: var(--space-3);
  }

  .footer__content {
    flex-direction: column;
    gap: var(--space-6);
    text-align: center;
  }

  .footer__left {
    flex-direction: column;
    gap: var(--space-2);
  }

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

  .auth-card__oauth {
    flex-direction: column;
  }

  .form-input-group {
    flex-direction: column;
  }

  .profile-layout {
    flex-direction: column;
    padding: var(--space-6) var(--space-4);
  }

  .profile-sidebar {
    width: 100%;
    position: static;
  }

  .profile-section {
    padding: var(--space-6);
  }

  .profile-token {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

  .profile-token__key {
    max-width: 100%;
  }

  .profile-token__actions {
    align-self: flex-end;
  }
}

@media (max-width: 480px) {
  :root {
    --font-size-6xl: 2rem;
    --font-size-5xl: 1.75rem;
    --space-24: 4rem;
    --space-16: 3rem;
  }

  .container {
    padding: 0 var(--space-4);
  }

  .hero {
    padding-top: calc(var(--nav-height) + var(--space-16));
  }

  .hero__description {
    font-size: var(--font-size-base);
  }

  .stats__grid {
    grid-template-columns: 1fr 1fr;
  }
}