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

/* Root Variables */
:root {
  --bg: #F7F5F0;
  --ink: #1A1714;
  --ink-muted: #7A756E;
  --accent: #00d4c0;
  --accent-dark: #009e92;
  --border: #E2DDD6;
  --surface: #ECEAE4;
  --mono: 'DM Mono', monospace;
  --serif: 'DM Serif Display', serif;
  --sans: 'DM Sans', sans-serif;
}

/* Base Styles */
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 1.2rem 3rem;
  display: flex;
  align-items: center;
  gap: 2rem;
  background: rgba(0, 212, 192, 0.04);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0, 212, 192, 0.08);
  box-shadow: 0 4px 30px rgba(0, 212, 192, 0.03);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-img {
  width: 28px;
  height: 28px;
  object-fit: contain;
}

.logo-text {
  font-family: var(--serif);
  font-size: 1.1rem;
  color: var(--ink);
  text-decoration: none;
}

.logo-domain {
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--accent-dark);
}

.header-nav {
  display: flex;
  gap: 1.8rem;
  margin-left: auto;
}

.header-nav a {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-muted);
  text-decoration: none;
  transition: 0.2s;
}

.header-nav a:hover {
  color: var(--ink);
}

.header-back {
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  color: var(--ink-muted);
  text-decoration: none;
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 99px;
  transition: 0.2s;
}

.header-back:hover {
  color: var(--accent-dark);
  border-color: var(--accent);
}

/* Hero Section */
.hero {
  padding: 7rem 3rem 5rem;
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem 4rem;
  align-items: end;
  animation: fadeUp 0.8s ease both;
}

.hero-label {
  grid-column: 1 / -1;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent-dark);
  text-transform: uppercase;
}

h1 {
  font-family: var(--serif);
  font-size: clamp(3.5rem, 8vw, 6.5rem);
  font-weight: 400;
  line-height: 1.0;
  letter-spacing: -0.02em;
  color: var(--ink);
}

h1 em {
  font-style: italic;
  color: var(--accent-dark);
}

.hero-right {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.hero-desc {
  font-size: 1rem;
  font-weight: 300;
  line-height: 1.75;
  color: var(--ink-muted);
  max-width: 38ch;
}

.hero-line {
  grid-column: 1 / -1;
  height: 1px;
  background: var(--border);
  margin-top: 2rem;
}

/* Badge & Button Styles */
.coming-soon-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.2rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-dark);
  background: rgba(0, 212, 192, 0.08);
  border: 1px solid rgba(0, 212, 192, 0.2);
  padding: 0.35rem 0.8rem;
  border-radius: 99px;
  width: fit-content;
}

.cs-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s infinite;
}

.btn-primary {
  display: inline-flex;
  padding: 0.75rem 1.6rem;
  background: var(--ink);
  color: var(--bg);
  font-family: var(--sans);
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: 99px;
  transition: 0.2s;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.1);
  width: fit-content;
}

.btn-primary:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(0, 158, 146, 0.25);
}

/* Curriculum Section */
.section-label {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--ink-muted);
  text-transform: uppercase;
}

.formats {
  padding: 5rem 3rem;
  max-width: 1000px;
  margin: 0 auto;
  animation: fadeUp 0.8s 0.1s ease both;
}

.formats-header {
  margin-bottom: 3rem;
}

.curriculum-list {
  display: flex;
  flex-direction: column;
}

.curriculum-item {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 2rem;
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--border);
  transition: 0.3s;
}

.curriculum-item:first-child {
  border-top: 1px solid var(--border);
}

.curriculum-item:hover {
  transform: translateX(10px);
}

.curriculum-meta {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.c-tag {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--accent-dark);
  background: var(--surface);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  width: fit-content;
}

.c-num {
  font-family: var(--serif);
  font-size: 2rem;
  color: var(--border);
  line-height: 1;
}

.curriculum-content h3 {
  font-family: var(--serif);
  font-size: 1.8rem;
  font-weight: 400;
  color: var(--ink);
  margin-bottom: 0.8rem;
}

.curriculum-content p {
  font-size: 0.95rem;
  font-weight: 300;
  line-height: 1.6;
  color: var(--ink-muted);
  max-width: 50ch;
}

/* Notify Section */
.notify-section {
  padding: 7rem 3rem;
}

.notify-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1.5rem;
}

.notify-inner h2 {
  font-family: var(--serif);
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  line-height: 1.15;
}

.notify-inner h2 em {
  font-style: italic;
  color: var(--accent-dark);
}

.notify-inner p {
  font-size: 0.95rem;
  color: var(--ink-muted);
  max-width: 40ch;
}

.notify-form {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  justify-content: center;
}

.notify-input {
  padding: 0.75rem 1.1rem;
  font-family: var(--sans);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  min-width: 250px;
  outline: none;
  transition: 0.2s;
}

.notify-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 212, 192, 0.1);
}

.notify-success {
  display: none;
  color: var(--accent-dark);
  font-weight: 500;
}

/* Footer (Base Desktop) */
footer {
  position: relative;
  z-index: 1;
  background: var(--surface);
  border-top: 1px solid var(--border);
}

.footer-bottom {
  padding: 1.4rem 3rem;
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.footer-logo {
  width: 24px;
  height: 24px;
  object-fit: contain;
}

.footer-tagline {
  font-size: 0.75rem;
  font-style: italic;
  color: var(--ink-muted);
  font-family: var(--serif);
}

.footer-copy {
  font-size: 0.73rem;
  color: var(--ink-muted);
  margin-left: auto;
}

.footer-legal {
  font-size: 0.73rem;
  color: var(--ink-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-legal:hover {
  color: var(--ink);
}

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

@keyframes pulse {
  0%,
  100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(0.8);
    opacity: 0.5;
  }
}

/* Responsive */
@media (max-width: 768px) {
  header {
    padding: 1.2rem 1.5rem;
    justify-content: space-between;
  }

  .header-nav {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    padding: 4rem 1.5rem;
  }

  .curriculum-item {
    grid-template-columns: 1fr;
    gap: 1rem;
    padding: 2rem 0;
  }

  .curriculum-item:hover {
    transform: none;
  }

  .formats,
  .notify-section {
    padding: 3rem 1.5rem;
  }

  .notify-form {
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }

  .footer-bottom {
    flex-direction: column;
    justify-content: center;
    gap: 1rem;
    padding: 1.4rem 1.5rem;
    text-align: center;
  }

  .footer-copy {
    margin-left: 0;
  }
}