/* Student HackPad 2026 – Premium Edition Styles */
/* Import premium fonts for a refined look */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;600;700&family=Inter:wght@400;500;700&display=swap');

/* Colour variables */
:root {
  /* Primary palette */
  /* Soft sunrise to sky gradient */
  --gradient-start: #f8d9e5; /* blush pink */
  --gradient-end: #d1effa;   /* pale aqua */
  /* Accent colours for buttons and highlights */
  --accent: #ff5e8d;         /* coral pink */
  --accent-alt: #5ec9f5;     /* aqua blue */

  /* Text colours */
  --text-dark: #0a0a23;
  --text-light: #ffffff;

  /* Surfaces */
  --card-bg: rgba(255, 255, 255, 0.75);
  --card-border: rgba(255, 255, 255, 0.3);
  --nav-bg: rgba(255, 255, 255, 0.7);
  --footer-bg: rgba(255, 255, 255, 0.7);

  /* Shadows */
  --shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  /* Use Inter for body text; headings will use Montserrat */
  font-family: 'Inter', sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  scroll-behavior: smooth;
  min-height: 100vh;
}

/* Apply Montserrat to all headings for a refined look */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--accent-alt);
}

/* Navigation bar */
nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--nav-bg);
  backdrop-filter: blur(10px);
  padding: 0.75rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow);
  z-index: 1000;
}

nav .logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-dark);
  letter-spacing: 0.5px;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

nav ul li a {
  font-weight: 600;
  color: var(--text-dark);
  position: relative;
  padding-bottom: 0.2rem;
}

nav ul li a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s ease;
}

nav ul li a:hover::after,
nav ul li a:focus::after {
  width: 100%;
}

nav .auth-links a {
  margin-left: 1rem;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-weight: 600;
  transition: background 0.3s ease, color 0.3s ease, border 0.3s ease;
}

nav .auth-links .login {
  border: 2px solid var(--accent);
  color: var(--accent);
}

nav .auth-links .login:hover {
  background: var(--accent);
  color: var(--text-light);
}

nav .auth-links .signup {
  background: var(--accent);
  color: var(--text-light);
}

nav .auth-links .signup:hover {
  background: var(--accent-alt);
}

/* Hero section */
.hero {
  position: relative;
  width: 100%;
  min-height: 75vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 6rem 1rem 4rem;
  color: var(--text-dark);
}

/* Animated gradient background for hero */
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(120deg, var(--gradient-start), var(--gradient-end));
  animation: gradientShift 15s infinite alternate;
  z-index: -2;
}

/* Overlay for subtle pattern */
.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(circle at 20% 20%, rgba(255,255,255,0.5), rgba(255,255,255,0) 60%), radial-gradient(circle at 80% 80%, rgba(255,255,255,0.3), rgba(255,255,255,0) 60%);
  z-index: -1;
}

.hero h1 {
  font-size: 3.2rem;
  font-weight: 700;
  margin-bottom: 1rem;
  animation: fadeInUp 1s ease forwards;
  opacity: 0;
}

.hero p {
  font-size: 1.25rem;
  max-width: 800px;
  margin-bottom: 2rem;
  color: var(--text-dark);
  animation: fadeInUp 1.4s ease forwards;
  opacity: 0;
}

.btn-primary {
  display: inline-block;
  padding: 0.85rem 2rem;
  background: linear-gradient(45deg, var(--accent), var(--accent-alt));
  color: var(--text-light);
  font-weight: 600;
  border-radius: 8px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  animation: fadeInUp 1.8s ease forwards;
  opacity: 0;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 15px rgba(0,0,0,0.2);
}

/* Sections */
section {
  padding: 5rem 1rem;
  max-width: 1100px;
  margin: 0 auto;
}

section h2 {
  font-size: 2.4rem;
  margin-bottom: 1.5rem;
  color: var(--text-dark);
  text-align: center;
  font-weight: 700;
}

section .cards {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2.5rem;
}

section .card {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--card-border);
  padding: 2rem 1.5rem;
  border-radius: 16px;
  max-width: 320px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

section .card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 25px rgba(0,0,0,0.15);
}

section .card h3 {
  margin-bottom: 0.5rem;
  color: var(--accent);
  font-size: 1.5rem;
}

section .card p {
  font-size: 1rem;
  color: var(--text-dark);
}

/* Schedule and prizes tables */
table.schedule, table.prizes {
  width: 100%;
  border-collapse: collapse;
  margin-top: 2rem;
  color: var(--text-dark);
  box-shadow: var(--shadow);
}

table.schedule th, table.prizes th,
table.schedule td, table.prizes td {
  padding: 0.8rem;
  border: 1px solid rgba(0,0,0,0.1);
  text-align: left;
}

table.schedule th, table.prizes th {
  background: linear-gradient(45deg, var(--accent), var(--accent-alt));
  color: var(--text-light);
}

table.schedule tr:nth-child(even), table.prizes tr:nth-child(even) {
  background-color: rgba(255,255,255,0.7);
}

table.schedule tr:nth-child(odd), table.prizes tr:nth-child(odd) {
  background-color: rgba(255,255,255,0.5);
}

/* Footer */
footer {
  background: var(--footer-bg);
  backdrop-filter: blur(10px);
  padding: 3rem 1rem;
  text-align: center;
  color: var(--text-dark);
  margin-top: 4rem;
}

footer ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.2rem;
  margin-bottom: 1rem;
}

footer ul li a {
  color: var(--text-dark);
  font-weight: 600;
  transition: color 0.2s ease;
}

footer ul li a:hover {
  color: var(--accent);
}

footer p {
  font-size: 0.9rem;
}

/* Forms */
form {
  max-width: 450px;
  margin: 0 auto;
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  padding: 2.5rem;
  border-radius: 16px;
  box-shadow: var(--shadow);
}

form h2 {
  text-align: center;
  margin-bottom: 2rem;
  color: var(--text-dark);
  font-size: 1.8rem;
}

form .form-group {
  margin-bottom: 1.2rem;
}

form label {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--text-dark);
  font-size: 0.9rem;
  font-weight: 600;
}

form input[type="text"], form input[type="password"], form input[type="email"] {
  width: 100%;
  padding: 0.8rem;
  border-radius: 8px;
  border: 1px solid rgba(0,0,0,0.1);
  background-color: rgba(255,255,255,0.6);
  color: var(--text-dark);
  transition: border-color 0.2s ease;
}

form input:focus {
  outline: none;
  border-color: var(--accent);
}

form .btn-submit {
  width: 100%;
  padding: 0.9rem;
  background: linear-gradient(45deg, var(--accent), var(--accent-alt));
  color: var(--text-light);
  font-weight: 600;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

form .btn-submit:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 15px rgba(0,0,0,0.2);
}

form .link {
  display: block;
  margin-top: 1rem;
  text-align: center;
  font-size: 0.9rem;
  color: var(--accent);
}

form .link:hover {
  color: var(--accent-alt);
}

/* Cards layout for gallery */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
  margin-top: 2.5rem;
}

.gallery .project-card {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.gallery .project-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 10px 24px rgba(0,0,0,0.15);
}

.sponsor-card {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 120px;
}

.sponsor-card img {
  max-width: 100%;
  max-height: 60px;
  object-fit: contain;
  filter: grayscale(100%);
  opacity: 0.7;
  transition: filter 0.3s ease, opacity 0.3s ease, transform 0.3s ease;
}

.sponsor-card:hover img {
  filter: grayscale(0%);
  opacity: 1;
  transform: scale(1.05);
}

.project-card h4 {
  color: var(--accent);
  margin-bottom: 0.5rem;
  font-size: 1.3rem;
}

.project-card p {
  font-size: 0.95rem;
  color: var(--text-dark);
  margin-bottom: 1rem;
}

.project-card .badge {
  display: inline-block;
  background-color: var(--accent-alt);
  color: var(--text-light);
  padding: 0.3rem 0.6rem;
  border-radius: 4px;
  font-size: 0.75rem;
  margin-right: 0.3rem;
}

/* Animations */
@keyframes fadeInUp {
  0% {
    opacity: 0;
    transform: translateY(40px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes gradientShift {
  0% {
    background-position: 0 50%;
  }
  100% {
    background-position: 100% 50%;
  }
}

/* Responsive adjustments */
@media (max-width: 900px) {
  nav ul {
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
  }
  nav .auth-links {
    margin-top: 0.5rem;
  }
  .hero h1 {
    font-size: 2.5rem;
  }
  .hero p {
    font-size: 1.1rem;
  }
  section {
    padding: 4rem 1rem;
  }
}

/* Scroll reveal effect: elements start slightly below and fade in when visible */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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