/* style.css */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700&display=swap');

:root {
  /* COLORS */
  --color-bg: #f5f7fa;
  --color-surface: #ffffff;
  --color-primary: #0066ff;
  --color-primary-hover: #0051cc;
  --color-secondary: #010d29;
  --color-muted: #6c7886;
  --color-shadow: rgba(0, 0, 0, 0.05);

  /* TYPOGRAPHY */
  --font-body: 'Inter', sans-serif;
  --font-heading: 'Inter', sans-serif;

  /* SIZING */
  --radius: 12px;
  --spacing: 1.5rem;
  --transition: 0.25s ease;
}

/* RESET + BASE */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  font-size: 16px;
}
body {
  min-height: 100vh;
  background: var(--color-bg);
  color: var(--color-secondary);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--color-primary-hover); }

/* CONTAINERS */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: var(--spacing);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing) 0;
}
.nav-links {
  list-style: none;
  display: flex;
  gap: 2rem;
}
.nav-links a {
  font-weight: 600;
}
.nav-brand {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
}

/* CTA (Sign-In Button) */
.cta {
  background: var(--color-primary);
  color: #fff;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--radius);
  font-family: var(--font-heading);
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 4px 12px var(--color-shadow);
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}
.cta:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px var(--color-shadow);
}

/* HERO */
.hero {
  position: relative;
  color: #fff;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
  padding: 6rem 0;
  overflow: hidden;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: var(--spacing);
}
.hero-content h1 {
  font-family: var(--font-heading);
  font-size: 3rem;
  margin-bottom: 1rem;
}
.hero-content p {
  font-size: 1.125rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}
.hero-image img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: 0 8px 24px var(--color-shadow);
}

/* FEATURE CARDS */
.featured {
  padding: 4rem 0;
}
.featured h2 {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  margin-bottom: var(--spacing);
}
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing);
}
.card {
  background: var(--color-surface);
  padding: 2rem;
  border-radius: var(--radius);
  box-shadow: 0 4px 16px var(--color-shadow);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--color-shadow);
}
.card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.15rem;
  font-weight: 600;
}

/* BUTTONS */
.btn {
  font-family: var(--font-heading);
  border: none;
  border-radius: var(--radius);
  padding: 0.75rem 1.5rem;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}
.btn.primary {
  background: var(--color-primary);
  color: #fff;
}
.btn.primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
}
.btn.secondary {
  background: var(--color-surface);
  color: var(--color-secondary);
  border: 2px solid var(--color-muted);
}
.btn.secondary:hover {
  background: var(--color-muted);
  color: #fff;
}

/* FORM ELEMENTS */
input,
textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #ddd;
  border-radius: var(--radius);
  font-size: 1rem;
  margin-top: 0.5rem;
  margin-bottom: 1rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}
input:focus,
textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.2);
  outline: none;
}
label {
  font-weight: 500;
  color: var(--color-muted);
  display: block;
  margin-bottom: 0.25rem;
}

/* SEARCH & ACTIVITIES */
#search-container {
  margin: 2rem auto;
  max-width: 800px;
}
#search-container input {
  padding: 0.75rem 1rem;
  border: 2px solid var(--color-primary);
  border-radius: var(--radius);
}
#search-container input:focus {
  outline: none;
  border-color: var(--color-primary-hover);
}

/* 404 PAGE */
.wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  text-align: center;
  padding: var(--spacing);
}
.wrapper h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: var(--color-primary);
}
.wrapper p {
  font-size: 1.125rem;
  margin-bottom: 1.5rem;
}

/* LOGIN MODAL */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}
.modal-content {
  background: var(--color-surface);
  padding: 2rem;
  border-radius: var(--radius);
  max-width: 360px;
  width: 90%;
  box-shadow: 0 8px 24px var(--color-shadow);
  position: relative;
  text-align: center;
}
.modal-content h2 {
  margin-bottom: 1rem;
  font-size: 1.5rem;
  color: var(--color-secondary);
}
.modal-content form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.modal-content input {
  padding: 0.75rem;
  border: 1px solid #ddd;
  border-radius: var(--radius);
  font-size: 1rem;
}
.modal-close {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .nav-links {
    display: none;
  }
}