/* ============================================
   Kima VPN — Design v1 (Purple / Violet)
   ============================================ */

:root {
  /* Accent */
  --color-accent: #a855f7;
  --color-accent-hover: #9333ea;

  /* Dark theme */
  --color-bg: #0a0812;
  --color-surface: #130f1e;
  --color-surface-2: #1c1630;
  --color-text: #f1eeff;
  --color-text-secondary: #9e97bf;
  --color-border: rgba(168, 85, 247, 0.12);

  /* Status */
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-error: #ef4444;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Typography */
  --font-sans: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 2.5rem;
  --text-5xl: 3rem;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
}

[data-theme="light"] {
  --color-bg: #f3f0ff;
  --color-surface: #ffffff;
  --color-surface-2: #ede8ff;
  --color-text: #1a0f2e;
  --color-text-secondary: #5c4d7a;
  --color-border: rgba(168, 85, 247, 0.15);
}

/* Animated grid background */
.grid-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  background-image:
    linear-gradient(rgba(168, 85, 247, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(168, 85, 247, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
}

.grid-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 70% at 50% -10%, rgba(168, 85, 247, 0.18) 0%, transparent 70%);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color var(--transition-base), color var(--transition-base);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

body > .header,
body > main,
body > .footer {
  position: relative;
  z-index: 1;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

a:hover {
  opacity: 0.85;
}

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 8, 18, 0.82);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(168, 85, 247, 0.1);
  transition: background var(--transition-base);
}

[data-theme="light"] .header {
  background: rgba(243, 240, 255, 0.88);
  border-bottom-color: rgba(168, 85, 247, 0.15);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: var(--space-lg);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text);
  font-weight: 700;
  font-size: var(--text-lg);
  letter-spacing: -0.01em;
}

.logo:hover {
  color: var(--color-text);
  opacity: 0.9;
}

.logo__img {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  object-fit: contain;
  border-radius: 8px;
}

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

.nav__link {
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
}

.nav__link:hover {
  color: var(--color-text);
}

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

.header__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 36px;
  padding: 0 var(--space-lg);
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.header__btn--secondary {
  color: var(--color-text-secondary);
  background: transparent;
  border: 1px solid rgba(168, 85, 247, 0.3);
}

[data-theme="light"] .header__btn--secondary {
  border-color: rgba(168, 85, 247, 0.3);
}

.header__btn--secondary:hover {
  color: var(--color-text);
  border-color: var(--color-accent);
  background: rgba(168, 85, 247, 0.07);
}

.header__btn--primary {
  color: #ffffff;
  background: var(--color-accent);
  border: 1px solid var(--color-accent);
}

.header__btn--primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

/* Theme toggle */
.theme-toggle {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  color: var(--color-text-secondary);
  background: transparent;
  border: 1px solid rgba(168, 85, 247, 0.3);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

[data-theme="light"] .theme-toggle {
  border-color: rgba(168, 85, 247, 0.3);
}

.theme-toggle:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.theme-toggle__icon {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  inset: 0;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.theme-toggle__svg {
  width: 18px;
  height: 18px;
}

.theme-toggle__icon--sun { opacity: 0; }
.theme-toggle__icon--moon { opacity: 1; }
[data-theme="light"] .theme-toggle__icon--sun { opacity: 1; }
[data-theme="light"] .theme-toggle__icon--moon { opacity: 0; }

/* Hero */
.hero {
  position: relative;
  padding: calc(var(--space-3xl) * 1.5) 0 var(--space-3xl);
  min-height: 72vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero__inner {
  position: relative;
  z-index: 2;
  max-width: 640px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 5px 14px;
  background: rgba(168, 85, 247, 0.12);
  border: 1px solid rgba(168, 85, 247, 0.25);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--space-lg);
}

.hero__title {
  font-size: clamp(2.2rem, 5.5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-lg);
  background: linear-gradient(135deg, #f1eeff 0%, #c4b5fd 50%, #a855f7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

[data-theme="light"] .hero__title {
  background: linear-gradient(135deg, #1a0f2e 0%, #7c3aed 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 520px;
  margin-bottom: var(--space-2xl);
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.hero__glow {
  position: absolute;
  top: 10%;
  right: -5%;
  width: 650px;
  height: 650px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.14) 0%, rgba(124, 58, 237, 0.06) 40%, transparent 70%);
  pointer-events: none;
  animation: pulse-glow 6s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { transform: scale(1); opacity: 0.8; }
  50% { transform: scale(1.08); opacity: 1; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md) var(--space-xl);
  font-family: inherit;
  font-size: var(--text-base);
  font-weight: 600;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  letter-spacing: 0.01em;
}

.btn--primary {
  background: linear-gradient(135deg, #a855f7 0%, #7c3aed 100%);
  color: #ffffff;
  box-shadow: 0 0 0 0 rgba(168, 85, 247, 0.4);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(168, 85, 247, 0.4);
}

.btn--secondary {
  background: rgba(168, 85, 247, 0.08);
  color: var(--color-text);
  border: 1px solid rgba(168, 85, 247, 0.25);
}

[data-theme="light"] .btn--secondary {
  background: rgba(168, 85, 247, 0.06);
  border-color: rgba(168, 85, 247, 0.2);
}

.btn--secondary:hover {
  background: rgba(168, 85, 247, 0.15);
  border-color: var(--color-accent);
}

.btn--large {
  padding: var(--space-lg) var(--space-2xl);
  font-size: var(--text-lg);
}

/* Sections */
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-2xl);
  color: var(--color-text);
  letter-spacing: -0.02em;
}

/* Features */
.features {
  padding: var(--space-3xl) 0;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-lg);
}

.feature-card {
  background: var(--color-surface);
  padding: var(--space-xl);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.05) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: rgba(168, 85, 247, 0.4);
  box-shadow: 0 16px 48px rgba(168, 85, 247, 0.12);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-card__icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(168, 85, 247, 0.12);
  border-radius: var(--radius-lg);
  color: var(--color-accent);
  margin-bottom: var(--space-lg);
}

.feature-card__title {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.feature-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* CTA */
.cta {
  padding: var(--space-3xl) 0;
}

.cta__inner {
  background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-surface-2) 100%);
  padding: var(--space-3xl);
  border-radius: calc(var(--radius-xl) * 1.5);
  text-align: center;
  border: 1px solid rgba(168, 85, 247, 0.2);
  position: relative;
  overflow: hidden;
}

.cta__inner::before {
  content: '';
  position: absolute;
  top: -60px;
  left: 50%;
  transform: translateX(-50%);
  width: 400px;
  height: 200px;
  background: radial-gradient(ellipse, rgba(168, 85, 247, 0.2) 0%, transparent 70%);
  pointer-events: none;
}

.cta__title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: var(--space-md);
  color: var(--color-text);
  letter-spacing: -0.02em;
  position: relative;
}

.cta__subtitle {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
  position: relative;
}

/* Footer */
.footer {
  padding: var(--space-2xl) 0;
  border-top: 1px solid rgba(168, 85, 247, 0.1);
}

[data-theme="light"] .footer {
  border-top-color: rgba(168, 85, 247, 0.15);
}

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

.footer__top {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-xl);
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(168, 85, 247, 0.08);
}

.footer__section-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.footer__documents .footer__link,
.footer__support .footer__link {
  display: block;
}

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

.footer__brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-text);
  font-weight: 600;
}

.footer__logo {
  width: 30px;
  height: 30px;
  flex-shrink: 0;
  object-fit: contain;
  border-radius: 6px;
}

.footer__documents,
.footer__support {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

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

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

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

/* Cookie banner */
.cookie-banner {
  position: fixed;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - var(--space-2xl));
  max-width: 680px;
  background: var(--color-surface);
  border: 1px solid rgba(168, 85, 247, 0.2);
  border-radius: var(--radius-lg);
  padding: var(--space-md) var(--space-lg);
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  z-index: 1000;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3);
}

.cookie-banner__text {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin: 0;
  flex: 1;
  line-height: 1.5;
}

.cookie-banner__link {
  color: var(--color-accent);
  text-decoration: underline;
}

.cookie-banner__btn {
  flex-shrink: 0;
  padding: var(--space-xs) var(--space-lg);
  background: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s;
}

.cookie-banner__btn:hover {
  opacity: 0.85;
}

/* Animations */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero__badge { animation: fadeInUp 0.5s ease backwards; }
.hero__title { animation: fadeInUp 0.6s ease 0.05s backwards; }
.hero__subtitle { animation: fadeInUp 0.6s ease 0.12s backwards; }
.hero__actions { animation: fadeInUp 0.6s ease 0.2s backwards; }

/* Responsive */
@media (max-width: 768px) {
  .nav { display: none; }
  .hero { min-height: 60vh; padding: var(--space-2xl) 0; }
  .hero__actions { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
  .footer__top { flex-direction: column; align-items: center; text-align: center; }
  .footer__bottom { flex-direction: column; text-align: center; }
  .footer__documents, .footer__support { align-items: center; }
  .header__actions { gap: var(--space-xs); }
  .header__btn { padding: var(--space-xs) var(--space-md); font-size: var(--text-xs); }
  .cookie-banner { flex-direction: column; align-items: flex-start; gap: var(--space-md); bottom: var(--space-md); }
  .cookie-banner__btn { width: 100%; text-align: center; }
  .cta__inner { padding: var(--space-2xl) var(--space-lg); }
}

@media (prefers-reduced-motion: reduce) {
  .grid-bg, .hero__glow { display: none; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}