/* ===== CSS Variables & Color System ===== */
:root {
  /* Primary Colors */
  --ink-black: #011627;
  --porcelain: #fdfffc;
  --sea-green: #2ec4b6;
  --punch-red: #e71d36;
  --amber-glow: #ff9f1c;

  /* Color Layering for Depth */
  --bg-base: #011627;
  --bg-layer-1: #021d30;
  --bg-layer-2: #032639;
  --bg-layer-3: #042f43;
  --bg-layer-4: #053848;

  /* Text Colors */
  --text-primary: #fdfffc;
  --text-secondary: rgba(253, 255, 252, 0.7);
  --text-muted: rgba(253, 255, 252, 0.5);

  /* Two-Layer Shadow System */
  --shadow-sm:
    0 -1px 2px rgba(253, 255, 252, 0.03), 0 2px 4px rgba(1, 22, 39, 0.4);
  --shadow-md:
    0 -2px 4px rgba(253, 255, 252, 0.04), 0 4px 12px rgba(1, 22, 39, 0.5);
  --shadow-lg:
    0 -4px 8px rgba(253, 255, 252, 0.05), 0 8px 24px rgba(1, 22, 39, 0.6);
  --shadow-glow: 0 0 20px rgba(46, 196, 182, 0.3);

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 5rem;

  /* Typography */
  --font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-size-sm: clamp(0.875rem, 0.8rem + 0.25vw, 1rem);
  --font-size-base: clamp(1rem, 0.9rem + 0.35vw, 1.125rem);
  --font-size-lg: clamp(1.25rem, 1.1rem + 0.5vw, 1.5rem);
  --font-size-xl: clamp(1.5rem, 1.2rem + 1vw, 2rem);
  --font-size-2xl: clamp(2rem, 1.5rem + 2vw, 3rem);
  --font-size-3xl: clamp(2.5rem, 2rem + 2.5vw, 4rem);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-base);
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* ===== Navigation ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-sm) 0;
  background: rgba(1, 22, 39, 0.85);
  backdrop-filter: blur(12px);
  transition: var(--transition-base);
}

.navbar.scrolled {
  background: rgba(1, 22, 39, 0.95);
  box-shadow: var(--shadow-md);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.logo-accent {
  color: var(--sea-green);
}

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

.nav-link {
  position: relative;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--sea-green);
  transition: var(--transition-fast);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-cta {
  padding: 0.5rem 1.25rem;
  background: var(--sea-green);
  color: var(--bg-base) !important;
  border-radius: var(--radius-md);
  font-weight: 600;
}

.nav-cta::after {
  display: none;
}

.nav-cta:hover {
  background: #25a89c;
  transform: translateY(-2px);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.hamburger,
.hamburger::before,
.hamburger::after {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition-fast);
}

.hamburger {
  position: relative;
}

.hamburger::before,
.hamburger::after {
  content: "";
  position: absolute;
}

.hamburger::before {
  top: -7px;
}
.hamburger::after {
  top: 7px;
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg-layer-1);
    padding: var(--space-lg);
    gap: var(--space-md);
    transform: translateY(-150%);
    opacity: 0;
    transition: var(--transition-base);
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
  }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.875rem 1.75rem;
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: var(--transition-base);
}

.btn-icon {
  width: 18px;
  height: 18px;
  transition: var(--transition-fast);
}

.btn-primary {
  background: linear-gradient(135deg, var(--sea-green), #25a89c);
  color: var(--bg-base);
  box-shadow:
    var(--shadow-md),
    0 0 20px rgba(46, 196, 182, 0.2);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow:
    var(--shadow-lg),
    0 0 30px rgba(46, 196, 182, 0.3);
}

.btn-primary:hover .btn-icon {
  transform: translateX(4px);
}

.btn-secondary {
  background: var(--bg-layer-2);
  color: var(--text-primary);
  border: 1px solid var(--bg-layer-3);
}

.btn-secondary:hover {
  background: var(--bg-layer-3);
  transform: translateY(-3px);
}

.btn-full {
  width: 100%;
  justify-content: center;
}

/* ===== Hero Section ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2xl) var(--space-md);
  overflow: hidden;
}

.hero-bg-animation {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(
      ellipse at 20% 80%,
      rgba(46, 196, 182, 0.15) 0%,
      transparent 50%
    ),
    radial-gradient(
      ellipse at 80% 20%,
      rgba(255, 159, 28, 0.1) 0%,
      transparent 50%
    ),
    radial-gradient(
      ellipse at 50% 50%,
      rgba(231, 29, 54, 0.05) 0%,
      transparent 50%
    );
  animation: bgPulse 8s ease-in-out infinite;
}

@keyframes bgPulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.8;
    transform: scale(1.05);
  }
}

.hero-content {
  position: relative;
  text-align: center;
  max-width: 800px;
  z-index: 1;
}

.hero-greeting {
  font-size: var(--font-size-lg);
  color: var(--sea-green);
  font-weight: 500;
  margin-bottom: var(--space-sm);
  animation: fadeInUp 0.6s ease;
}

.hero-name {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-sm);
  animation: fadeInUp 0.6s ease 0.1s backwards;
}

.cursor {
  color: var(--sea-green);
  animation: blink 1s infinite;
}

@keyframes blink {
  0%,
  50% {
    opacity: 1;
  }
  51%,
  100% {
    opacity: 0;
  }
}

.hero-title {
  font-size: var(--font-size-xl);
  font-weight: 400;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
  animation: fadeInUp 0.6s ease 0.2s backwards;
}

.title-accent {
  color: var(--sea-green);
  font-weight: 600;
}

.hero-tagline {
  font-size: var(--font-size-base);
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto var(--space-lg);
  animation: fadeInUp 0.6s ease 0.3s backwards;
}

.hero-cta {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.6s ease 0.4s backwards;
}

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

.scroll-indicator {
  position: absolute;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  color: var(--text-muted);
  font-size: 0.75rem;
  animation: float 2s ease-in-out infinite;
}

.mouse {
  width: 24px;
  height: 38px;
  border: 2px solid var(--text-muted);
  border-radius: 12px;
  position: relative;
}

.wheel {
  width: 4px;
  height: 8px;
  background: var(--sea-green);
  border-radius: 2px;
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  animation: scroll 1.5s ease-in-out infinite;
}

@keyframes scroll {
  0% {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
  100% {
    opacity: 0;
    transform: translateX(-50%) translateY(12px);
  }
}

@keyframes float {
  0%,
  100% {
    transform: translateX(-50%) translateY(0);
  }
  50% {
    transform: translateX(-50%) translateY(-8px);
  }
}

/* ===== 20:9 Tall Smartphone Screens (max-width: 430px) ===== */
@media (max-width: 430px) {
  :root {
    --font-size-sm: clamp(0.8rem, 0.75rem + 0.2vw, 0.9rem);
    --font-size-base: clamp(0.9rem, 0.85rem + 0.25vw, 1rem);
    --font-size-lg: clamp(1.1rem, 1rem + 0.4vw, 1.25rem);
    --font-size-xl: clamp(1.25rem, 1.1rem + 0.6vw, 1.5rem);
    --font-size-2xl: clamp(1.5rem, 1.25rem + 1vw, 2rem);
    --font-size-3xl: clamp(1.75rem, 1.5rem + 1.5vw, 2.5rem);
    
    --space-xs: 0.375rem;
    --space-sm: 0.75rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
  }

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

  /* Navigation adjustments */
  .nav-container {
    padding: 0 var(--space-sm);
  }

  .nav-logo {
    font-size: 1.25rem;
  }

  .nav-menu {
    top: 55px;
    padding: var(--space-md);
  }

  /* Hero Section */
  .hero {
    min-height: 100svh;
    padding: var(--space-xl) var(--space-sm);
  }

  .hero-content {
    max-width: 100%;
    padding: 0 var(--space-xs);
  }

  .hero-greeting {
    font-size: var(--font-size-base);
    margin-bottom: var(--space-xs);
  }

  .hero-name {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-xs);
    word-break: break-word;
  }

  .hero-title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-sm);
  }

  .hero-tagline {
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-md);
    padding: 0 var(--space-xs);
    line-height: 1.5;
  }

  .hero-cta {
    flex-direction: column;
    gap: var(--space-xs);
    width: 100%;
    padding: 0 var(--space-sm);
  }

  .hero-cta .btn {
    width: 100%;
    justify-content: center;
    padding: 0.75rem 1.25rem;
    font-size: var(--font-size-sm);
  }

  .scroll-indicator {
    bottom: var(--space-sm);
  }

  .mouse {
    width: 20px;
    height: 32px;
  }

  /* Buttons */
  .btn {
    padding: 0.75rem 1.25rem;
    font-size: var(--font-size-sm);
  }
}