/* --- Student Projects Hub - Premium Obsidian Dark Theme --- */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Fira+Code:wght@400;500&display=swap');

:root {
  --bg-dark: #070913;
  --bg-darker: #04050a;
  --card-bg: rgba(15, 18, 36, 0.45);
  --card-border: rgba(255, 255, 255, 0.05);
  --card-border-glow: rgba(99, 102, 241, 0.25);
  
  --primary: #6366f1; /* Neon Indigo */
  --primary-light: #818cf8;
  --secondary: #06b6d4; /* Neon Cyan */
  --secondary-light: #22d3ee;
  --accent: #a855f7; /* Purple Glow */
  --accent-light: #c084fc;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dark: #475569;
  
  --font-sans: 'Outfit', sans-serif;
  --font-mono: 'Fira Code', monospace;
  
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 10px 30px 0 rgba(99, 102, 241, 0.15);
  
  --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  --gradient-purple: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  overflow-x: hidden;
  width: 100%;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  width: 100%;
  position: relative;
  -webkit-font-smoothing: antialiased;
}

/* Background Glow Effects */
.bg-glow-1 {
  position: absolute;
  top: -10%;
  left: 10%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.12) 0%, rgba(99, 102, 241, 0) 70%);
  z-index: 1;
  pointer-events: none;
}

.bg-glow-2 {
  position: absolute;
  top: 40%;
  right: -5%;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.1) 0%, rgba(6, 182, 212, 0) 70%);
  z-index: 1;
  pointer-events: none;
}

.bg-glow-3 {
  position: absolute;
  bottom: 5%;
  left: -5%;
  width: 550px;
  height: 550px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.08) 0%, rgba(168, 85, 247, 0) 70%);
  z-index: 1;
  pointer-events: none;
}

/* Typography */
h1, h2, h3, h4, h5 {
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-fast);
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 10;
}

/* Header & Sticky Glass Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(7, 9, 19, 0.65);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--card-border);
  transition: var(--transition-fast);
}

.navbar.scrolled {
  background: rgba(4, 5, 10, 0.85);
  padding: 8px 0;
  box-shadow: var(--shadow-md);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-icon {
  background: var(--gradient-primary);
  -webkit-background-clip: unset;
  -webkit-text-fill-color: unset;
  color: white;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-size: 1.1rem;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
}

.nav-link:hover, .nav-link.active {
  color: var(--text-main);
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 28px;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-smooth);
  border: none;
  outline: none;
  font-family: var(--font-sans);
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-main);
  border: 1px solid var(--card-border);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.85rem;
  border-radius: 8px;
}

.btn-block {
  width: 100%;
}

/* Hero Section */
.hero {
  padding: 160px 0 100px 0;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.2);
  color: var(--primary-light);
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 3.5rem;
  line-height: 1.15;
  margin-bottom: 24px;
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 40px;
  max-width: 580px;
}

.hero-actions {
  display: flex;
  gap: 16px;
}

/* Glassmorphic Laptop Visual */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.mockup-container {
  width: 100%;
  max-width: 440px;
  aspect-ratio: 16/11;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: 16px;
  padding: 16px;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  position: relative;
}

.mockup-header {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 8px;
}

.mockup-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.dot-r { background: #ff5f56; }
.dot-y { background: #ffbd2e; }
.dot-g { background: #27c93f; }

.mockup-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-left: 10px;
}

.mockup-content {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: #a7f3d0;
  line-height: 1.6;
  overflow: hidden;
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 80px auto 50px auto;
}

.section-tag {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--secondary);
  display: block;
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.section-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* Showcase Controls */
.controls-bar {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 40px;
}

.search-box {
  position: relative;
  width: 100%;
}

.search-input {
  width: 100%;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 14px 20px 14px 45px;
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 1rem;
  outline: none;
  transition: var(--transition-fast);
}

.search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 15px rgba(99, 102, 241, 0.15);
  background: rgba(255, 255, 255, 0.05);
}

.search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  width: 18px;
  height: 18px;
}

.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.filter-btn {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--card-border);
  padding: 8px 18px;
  border-radius: 100px;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition-fast);
}

.filter-btn:hover, .filter-btn.active {
  background: var(--gradient-primary);
  border-color: transparent;
  color: white;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}

/* Project Cards Grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.project-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 24px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition-smooth);
  height: 100%;
}

.project-card:hover {
  border-color: var(--card-border-glow);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.domain-badge {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 4px 10px;
  border-radius: 6px;
}

.domain-iot {
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.2);
  color: var(--secondary-light);
}

.domain-web {
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.2);
  color: var(--primary-light);
}

.domain-ai {
  background: rgba(168, 85, 247, 0.1);
  border: 1px solid rgba(168, 85, 247, 0.2);
  color: var(--accent-light);
}

.difficulty-badge {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
}

.project-title {
  font-size: 1.35rem;
  margin-bottom: 12px;
  color: var(--text-main);
}

.project-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  flex-grow: 1;
}

.card-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 18px;
}

/* Modals & Overlays */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(4, 5, 10, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  padding: 24px;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: #0d1020;
  border: 1px solid var(--card-border-glow);
  width: 100%;
  max-width: 800px;
  border-radius: 24px;
  padding: 35px;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  position: relative;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(20px);
  transition: transform 0.3s ease;
}

.modal-overlay.active .modal-content {
  transform: translateY(0);
}

.modal-close {
  position: absolute;
  top: 24px;
  right: 24px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--card-border);
  color: var(--text-main);
  font-size: 1.5rem;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--secondary-light);
}

.modal-header {
  margin-bottom: 24px;
}

.modal-title-row {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-bottom: 10px;
}

.modal-body {
  display: flex;
  flex-direction: column;
  gap: 25px;
}

/* Modal Tabs */
.modal-tabs {
  display: flex;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  gap: 20px;
  margin-bottom: 10px;
}

.modal-tab-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  padding: 12px 6px;
  cursor: pointer;
  position: relative;
  transition: var(--transition-fast);
}

.modal-tab-btn:hover {
  color: var(--text-main);
}

.modal-tab-btn.active {
  color: var(--secondary-light);
}

.modal-tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-primary);
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Code Snippet Box with Highlight styles */
.code-container {
  position: relative;
  background: #05060b;
  border: 1px solid var(--card-border);
  border-radius: 12px;
  overflow: hidden;
  margin-top: 15px;
}

.code-header {
  background: rgba(255, 255, 255, 0.02);
  padding: 10px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.code-lang {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.copy-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition-fast);
}

.copy-btn:hover {
  color: var(--secondary-light);
}

.code-block {
  margin: 0;
  padding: 18px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.6;
  color: #e2e8f0;
  white-space: pre;
}

/* Steps list */
.guide-steps {
  list-style-type: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.guide-step {
  display: flex;
  gap: 16px;
}

.step-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.3);
  color: var(--secondary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  flex-shrink: 0;
}

.step-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  padding-top: 2px;
}

.step-desc strong {
  color: var(--text-main);
}

/* Request / Consultation Section */
.request-section {
  padding: 100px 0;
  position: relative;
}

.request-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 60px;
  align-items: center;
}

.contact-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 24px;
  padding: 40px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.form-title {
  font-size: 1.8rem;
  margin-bottom: 24px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.form-group label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  padding: 12px 16px;
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition-fast);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--secondary);
  box-shadow: 0 0 10px rgba(6, 182, 212, 0.15);
  background: rgba(255, 255, 255, 0.05);
}

.form-textarea {
  resize: vertical;
}

/* Footer Section */
.footer {
  background-color: var(--bg-darker);
  border-top: 1px solid var(--card-border);
  padding: 60px 0 30px 0;
  text-align: center;
}

.footer-logo {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 12px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.footer-desc {
  color: var(--text-muted);
  max-width: 500px;
  margin: 0 auto 30px auto;
  font-size: 0.95rem;
}

.footer-divider {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  margin-bottom: 24px;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-title {
    font-size: 2.8rem;
  }
  .hero-desc {
    margin: 0 auto 30px auto;
  }
  .hero-actions {
    justify-content: center;
  }
  .projects-grid {
    grid-template-columns: 1fr;
  }
  .request-grid {
    grid-template-columns: 1fr;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}