@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Sora:wght@400;500;600;700&display=swap');

:root {
  --primary-bg: #0b0f19;
  --secondary-bg: #111827;
  --tertiary-bg: #0f172a;
  --primary-text: #ffffff;
  --secondary-text: #b4bcd9;
  --accent-purple: #7c3aed;
  --accent-light: #a78bfa;
  --glow-purple: rgba(124, 58, 237, 0.2);
  --border-color: rgba(255, 255, 255, 0.08);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--primary-bg);
  color: var(--primary-text);
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
  background: radial-gradient(circle at top, #1a2033, #05070c);
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(17, 24, 39, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(124, 58, 237, 0.1);
  z-index: 1000;
  padding: 1rem 0;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--accent-purple);
  text-decoration: none;
  font-weight: 700;
  font-size: 1rem;
  transition: var(--transition);
  font-family: 'Sora', sans-serif;
}

.nav-logo:hover {
  color: var(--accent-light);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
  transition: all 0.3s ease;
}

.hamburger span {
  width: 24px;
  height: 2.5px;
  background: var(--accent-purple);
  border-radius: 2px;
  transition: all 0.3s ease;
  transform-origin: center;
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(10px, 10px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(8px, -8px);
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  color: var(--secondary-text);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--accent-purple);
}

.mobile-nav {
  display: none;
  position: fixed;
  top: 60px;
  left: 0;
  right: 0;
  background: rgba(17, 24, 39, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(124, 58, 237, 0.1);
  padding: 1.5rem;
  flex-direction: column;
  gap: 1.5rem;
  z-index: 999;
  animation: slideDown 0.3s ease;
}

.mobile-nav.active {
  display: flex;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.mobile-nav a {
  display: block;
  padding: 0.75rem 0;
  color: var(--secondary-text);
  text-decoration: none;
  font-weight: 500;
  font-size: 1rem;
  border-bottom: 1px solid rgba(124, 58, 237, 0.1);
  transition: var(--transition);
}

.mobile-nav a:last-child {
  border-bottom: none;
}

.mobile-nav a:hover {
  color: var(--accent-purple);
  padding-left: 0.5rem;
}

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

  .nav-links {
    display: none;
  }
}

/* Hero Section */
.hero {
  padding: 120px 40px 80px;
  text-align: center;
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: 10%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(ellipse at center, rgba(124, 58, 237, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
  text-align: center;
  margin-bottom: 0;
}

.hero-title {
  font-size: 64px;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: fadeInUp 0.8s ease-out;
  font-family: 'Sora', sans-serif;
}

.hero-subtitle {
  font-size: 20px;
  color: var(--secondary-text);
  opacity: 0.8;
  max-width: 720px;
  margin: 0 auto 2.5rem;
  animation: fadeInUp 0.8s ease-out 0.2s both;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

.btn {
  padding: 1rem 2rem;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-light));
  color: var(--primary-bg);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: var(--transition);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px var(--glow-purple);
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-secondary {
  background: transparent;
  border: 1.5px solid var(--accent-purple);
  color: var(--accent-purple);
}

.btn-secondary:hover {
  background: rgba(124, 58, 237, 0.1);
  transform: translateY(-2px);
  box-shadow: 0 0 20px var(--glow-purple);
}

/* Hero Background */
.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  overflow: hidden;
}

.gradient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.3;
}

.orb-1 {
  width: 400px;
  height: 400px;
  background: var(--accent-purple);
  top: -50px;
  right: 10%;
  animation: float 8s ease-in-out infinite;
}

.orb-2 {
  width: 350px;
  height: 350px;
  background: var(--accent-light);
  bottom: -50px;
  left: 10%;
  animation: float 10s ease-in-out infinite 1s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(30px, -30px) rotate(120deg); }
  66% { transform: translate(-20px, 20px) rotate(240deg); }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.particles {
  position: absolute;
  width: 100%;
  height: 100%;
  background-image:
    radial-gradient(2px 2px at 20px 30px, var(--accent-purple), rgba(0, 0, 0, 0)),
    radial-gradient(2px 2px at 60px 70px, var(--accent-light), rgba(0, 0, 0, 0)),
    radial-gradient(1px 1px at 50px 50px, var(--accent-purple), rgba(0, 0, 0, 0));
  background-repeat: repeat;
  background-size: 200px 200px;
  animation: particleShift 20s linear infinite;
}

@keyframes particleShift {
  0% { background-position: 0 0; }
  100% { background-position: 200px 200px; }
}

/* Sections */
.problems, .solution {
  max-width: 1200px;
  margin: 6rem auto;
  padding: 0 2rem;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  margin-bottom: 1rem;
  text-align: center;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-family: 'Sora', sans-serif;
}

.section-subtitle {
  text-align: center;
  color: var(--secondary-text);
  font-size: 1.1rem;
  margin-bottom: 3rem;
}

/* Problem & Feature Cards */
.problems-grid, .features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}

.problem-card, .feature-card {
  background: var(--secondary-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.problem-card:hover, .feature-card:hover {
  border-color: var(--accent-purple);
  transform: translateY(-5px);
  box-shadow: 0 0 30px rgba(124, 58, 237, 0.2);
}

.problem-icon, .feature-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.problem-card h3, .feature-card h3 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: var(--primary-text);
  font-family: 'Sora', sans-serif;
}

.problem-card p, .feature-card p {
  color: var(--secondary-text);
  line-height: 1.6;
}

/* Pipeline */
.pipeline {
  max-width: 1400px;
  margin: 6rem auto;
  padding: 0 2rem;
}

.pipeline-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  overflow-x: auto;
  padding: 2rem 0;
  margin-top: 3rem;
}

.pipeline-step {
  background: var(--secondary-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem 1.5rem;
  min-width: 180px;
  text-align: center;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.pipeline-step:hover {
  border-color: var(--accent-purple);
  background: rgba(124, 58, 237, 0.1);
  transform: translateY(-5px);
  box-shadow: 0 0 30px var(--glow-purple);
}

.step-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.pipeline-step h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
  color: var(--accent-purple);
  font-weight: 700;
  font-family: 'Sora', sans-serif;
}

.pipeline-step p {
  font-size: 0.85rem;
  color: var(--secondary-text);
}

.pipeline-arrow {
  color: var(--accent-purple);
  font-size: 1.5rem;
  flex-shrink: 0;
}

/* Predictor Section */
.predictor-section {
  max-width: 1200px;
  margin: 6rem auto;
  padding: 0 2rem;
}

.predictor-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-top: 3rem;
}

.predictor-form {
  background: var(--secondary-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2.5rem;
  backdrop-filter: blur(10px);
}

.predictor-form h3 {
  font-size: 1.3rem;
  margin-bottom: 2rem;
  color: var(--primary-text);
  font-family: 'Sora', sans-serif;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--secondary-text);
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 0.75rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--primary-text);
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  font-size: 1rem;
  transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent-purple);
  background: rgba(124, 58, 237, 0.1);
}

.predictor-results {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.loading-container {
  background: var(--secondary-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2.5rem;
  backdrop-filter: blur(10px);
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.analysis-steps {
  width: 100%;
}

.step-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  animation: slideIn 0.6s ease-out;
}

.step-number {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-light));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.step-item p {
  color: var(--primary-text);
  font-weight: 600;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.colleges-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.college-card {
  background: var(--secondary-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
  transition: var(--transition);
  backdrop-filter: blur(10px);
  animation: slideUp 0.6s ease-out;
}

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

.college-card:hover {
  border-color: var(--accent-purple);
  transform: translateY(-4px);
  box-shadow: 0 0 20px var(--glow-purple);
}

.college-card h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--primary-text);
}

.probability-section {
  margin: 1rem 0;
}

.probability-value {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent-purple);
  margin-bottom: 0.5rem;
  font-family: 'Sora', sans-serif;
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 4px;
  overflow: hidden;
  margin: 1rem 0;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-purple), var(--accent-light));
  width: 0;
  transition: width 1s ease;
  border-radius: 4px;
}

.chance-label {
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  display: inline-block;
  margin-top: 0.5rem;
}

.chance-safe { background: rgba(16, 185, 129, 0.2); color: #10b981; }
.chance-high { background: rgba(124, 58, 237, 0.2); color: var(--accent-light); }
.chance-moderate { background: rgba(202, 138, 4, 0.2); color: #ca8a04; }
.chance-ambitious { background: rgba(249, 115, 22, 0.2); color: #f97316; }
.chance-dream { background: rgba(239, 68, 68, 0.2); color: #ef4444; }

.counselor-panel {
  background: var(--secondary-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2rem;
  backdrop-filter: blur(10px);
}

.counselor-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.counselor-icon {
  font-size: 2rem;
}

.counselor-header h4 {
  color: var(--accent-purple);
  font-family: 'Sora', sans-serif;
  font-weight: 700;
}

.counselor-chat {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.counselor-message {
  background: rgba(124, 58, 237, 0.1);
  border-left: 3px solid var(--accent-purple);
  padding: 1rem;
  border-radius: 8px;
  color: var(--secondary-text);
  line-height: 1.6;
  animation: slideIn 0.4s ease-out;
}

/* Metrics */
.metrics {
  max-width: 1200px;
  margin: 6rem auto;
  padding: 0 2rem;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.metric-card {
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.1), rgba(167, 139, 250, 0.05));
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2.5rem 2rem;
  text-align: center;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.metric-card:hover {
  border-color: var(--accent-purple);
  transform: translateY(-5px);
  box-shadow: 0 0 40px var(--glow-purple);
}

.metric-number {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  color: var(--accent-purple);
  margin-bottom: 0.5rem;
  font-family: 'Sora', sans-serif;
}

.metric-card p {
  color: var(--secondary-text);
  font-size: 0.95rem;
}

/* Architecture */
.architecture {
  max-width: 1200px;
  margin: 6rem auto;
  padding: 0 2rem;
}

.architecture-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.arch-block {
  background: var(--secondary-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  transition: var(--transition);
  text-align: center;
  backdrop-filter: blur(10px);
}

.arch-block:hover {
  border-color: var(--accent-light);
  background: rgba(167, 139, 250, 0.05);
  transform: translateY(-5px);
  box-shadow: 0 0 30px rgba(167, 139, 250, 0.2);
}

.block-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.arch-block h3 {
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
  color: var(--primary-text);
  font-family: 'Sora', sans-serif;
}

.arch-block p {
  color: var(--secondary-text);
  font-size: 0.9rem;
  line-height: 1.5;
}

/* Footer */
.footer {
  background: #05070c;
  border-top: 1px solid var(--border-color);
  padding: 4rem 2rem 2rem;
  margin-top: 6rem;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-section h4 {
  color: var(--accent-purple);
  margin-bottom: 1rem;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.footer-section ul {
  list-style: none;
}

.footer-section li {
  margin-bottom: 0.75rem;
}

.footer-section a {
  color: var(--secondary-text);
  text-decoration: none;
  transition: var(--transition);
  font-size: 0.9rem;
}

.footer-section a:hover {
  color: var(--accent-purple);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  color: var(--secondary-text);
  font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 768px) {
  .predictor-container {
    grid-template-columns: 1fr;
  }

  .pipeline-container {
    flex-direction: column;
    gap: 1rem;
  }

  .pipeline-arrow {
    transform: rotate(90deg);
  }

  .hero {
    padding: 80px 20px 60px;
  }

  .hero-title {
    font-size: 32px;
  }

  .hero-subtitle {
    font-size: 16px;
  }

  .hero-buttons {
    flex-direction: column;
    gap: 12px;
  }

  .btn {
    width: 100%;
    padding: 12px 20px;
    font-size: 0.95rem;
  }

  .nav-container {
    padding: 0 1rem;
  }

  section {
    padding: 80px 20px;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 80px 20px 60px;
  }

  .hero-title {
    font-size: 28px;
  }

  .hero-subtitle {
    font-size: 14px;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .problems-grid, .features-grid, .metrics-grid, .architecture-grid {
    grid-template-columns: 1fr;
  }

  .predictor-form, .predictor-results {
    padding: 1.5rem;
  }

  .college-card {
    padding: 1rem;
  }
}