/* ==========================================================================
   PRINCE SOFTWARE ENGINEER PORTFOLIO - MINIMALIST LIGHT DESIGN SYSTEM
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Plus+Jakarta+Sans:wght@500;600;700;800&display=swap');

:root {
  --bg-main: #ffffff;
  --bg-subtle: #fafafa;
  --bg-card: #ffffff;
  --bg-card-hover: #fcfcfc;
  --bg-muted: #f4f4f5;

  --border-color: #e4e4e7;
  --border-hover: #a1a1aa;

  --text-primary: #09090b;
  --text-secondary: #52525b;
  --text-muted: #71717a;
  --text-dim: #a1a1aa;

  --accent-black: #09090b;
  --accent-blue: #2563eb;
  --accent-emerald: #059669;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-pill: 9999px;

  --shadow-subtle: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.03);
  --shadow-hover: 0 12px 24px -10px rgba(0, 0, 0, 0.08);

  --transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  line-height: 1.6;
  background-color: var(--bg-main);
}

h1, h2, h3, h4, .font-heading {
  font-family: 'Plus Jakarta Sans', 'Inter', sans-serif;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

.bg-pattern {
  background-image: radial-gradient(#e4e4e7 1px, transparent 1px);
  background-size: 24px 24px;
  background-position: -19px -19px;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 18px 0;
}

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

.nav-logo {
  font-size: 1.15rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--text-primary);
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-logo-badge {
  background: var(--text-primary);
  color: #ffffff;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.88rem;
  transition: var(--transition);
}

.nav-links a:hover, .nav-links a.active {
  color: var(--text-primary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.88rem;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent-black);
  color: #ffffff;
  border-color: var(--accent-black);
}

.btn-primary:hover {
  background: #27272a;
  border-color: #27272a;
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-main);
  color: var(--text-primary);
  border-color: var(--border-color);
  box-shadow: var(--shadow-subtle);
}

.btn-secondary:hover {
  background: var(--bg-subtle);
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

.btn-sm {
  padding: 7px 14px;
  font-size: 0.82rem;
}

/* Hero Section */
.hero-section {
  padding: 160px 0 80px;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-main);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 50px;
  align-items: center;
}

.status-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  color: #166534;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #16a34a;
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 620px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-bottom: 40px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

.metric-box h4 {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text-primary);
}

.metric-box p {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Profile Card */
.profile-card {
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px;
  box-shadow: var(--shadow-subtle);
  transition: var(--transition);
}

.profile-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--border-hover);
}

.profile-avatar-wrapper {
  position: relative;
  width: 88px;
  height: 88px;
  margin-bottom: 20px;
}

.profile-avatar-img {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center 20%;
  border: 3px solid var(--bg-main);
  box-shadow: 0 0 0 2px var(--border-color), 0 4px 14px rgba(0, 0, 0, 0.08);
  transition: var(--transition);
  display: block;
}

.profile-card:hover .profile-avatar-img {
  box-shadow: 0 0 0 2px var(--text-primary), 0 6px 20px rgba(0, 0, 0, 0.12);
  transform: scale(1.03);
}

.profile-online-badge {
  position: absolute;
  bottom: 3px;
  right: 3px;
  width: 14px;
  height: 14px;
  background-color: #10b981;
  border: 2.5px solid #ffffff;
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
}

.profile-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.profile-card p.role {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-bottom: 16px;
  font-weight: 500;
}

.skill-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 16px;
}

.pill {
  background: var(--bg-muted);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 500;
}

/* Section Common */
.section {
  padding: 90px 0;
  border-bottom: 1px solid var(--border-color);
}

.section-label {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 8px;
  display: block;
}

.section-heading {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text-primary);
}

.section-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin-bottom: 40px;
}

/* IIT Madras Banner */
.iitm-card {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 40px;
  display: flex;
  align-items: center;
  gap: 36px;
}

.iitm-logo {
  background: #ffffff;
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  flex-shrink: 0;
}

.iitm-logo img {
  height: 55px;
  width: auto;
  display: block;
}

.iitm-info h4 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.iitm-info p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
}

/* Applications Grid */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.app-box {
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.app-box:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

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

.app-badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  background: #f4f4f5;
  color: #18181b;
  border: 1px solid #e4e4e7;
}

.app-box h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.app-box p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 24px;
  line-height: 1.6;
}

.app-link {
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.88rem;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

.app-link:hover {
  gap: 10px;
  color: var(--accent-blue);
}

/* Admin Panels Gallery Section */
.admin-gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 24px;
}

.admin-panel-card {
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.admin-panel-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.admin-img-wrapper {
  position: relative;
  width: 100%;
  height: 210px;
  background: #f4f4f5;
  overflow: hidden;
  border-bottom: 1px solid var(--border-color);
}

.admin-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top left;
  transition: transform 0.4s ease;
}

.admin-panel-card:hover .admin-img-wrapper img {
  transform: scale(1.03);
}

.admin-overlay-icon {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(9, 9, 11, 0.75);
  color: #ffffff;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  backdrop-filter: blur(4px);
  opacity: 0.85;
}

.admin-card-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  flex: 1;
}

.admin-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.admin-tag {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--accent-blue);
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.admin-card-body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.admin-card-body p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 14px;
}

.admin-card-footer {
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid #f4f4f5;
}

/* Lightbox Modal for Screenshots */
.lightbox-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(9, 9, 11, 0.85);
  backdrop-filter: blur(8px);
  z-index: 5000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 30px;
}

.lightbox-modal.open {
  display: flex;
}

.lightbox-container {
  max-width: 1200px;
  width: 100%;
  max-height: 90vh;
  background: #ffffff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
}

.lightbox-header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #fafafa;
}

.lightbox-title h3 {
  font-size: 1.1rem;
  font-weight: 700;
}

.lightbox-close {
  background: transparent;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-secondary);
}

.lightbox-body {
  padding: 20px;
  overflow-y: auto;
  text-align: center;
  background: #f4f4f5;
}

.lightbox-body img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

/* Websites Filter Tabs & Grid */
.filter-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.tab-btn {
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.tab-btn.active, .tab-btn:hover {
  background: var(--text-primary);
  color: #ffffff;
  border-color: var(--text-primary);
}

.websites-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
}

.site-box {
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.site-box:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-subtle);
  transform: translateY(-2px);
}

.site-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.site-category {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.site-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.site-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.site-link {
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.85rem;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

.site-link:hover {
  color: var(--accent-blue);
}

/* Skills Matrix */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.skill-category-card {
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
}

.skill-category-card h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.skill-list {
  list-style: none;
}

.skill-list li {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.skill-list li i {
  color: var(--text-primary);
  font-size: 0.8rem;
}

/* Corporate Contact Form */
.contact-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 50px;
}

.contact-info h3 {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.contact-info p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 24px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 16px;
}

.contact-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--bg-muted);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.form-group {
  margin-bottom: 16px;
}

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

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.form-input, .form-textarea {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.9rem;
  transition: var(--transition);
  outline: none;
}

.form-input:focus, .form-textarea:focus {
  border-color: var(--text-primary);
  box-shadow: 0 0 0 3px rgba(9, 9, 11, 0.05);
}

.form-textarea {
  resize: vertical;
  min-height: 110px;
}

/* Toast Notifications */
.toast-notification {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 2000;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  background: var(--text-primary);
  color: #ffffff;
  font-size: 0.88rem;
  font-weight: 500;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
  display: flex;
  align-items: center;
  gap: 10px;
  transform: translateY(80px);
  opacity: 0;
  transition: var(--transition);
}

.toast-notification.show {
  transform: translateY(0);
  opacity: 1;
}

/* Footer */
footer {
  padding: 40px 0;
  background: var(--bg-subtle);
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: center;
}

/* Responsive */
@media (max-width: 992px) {
  .hero-grid { grid-template-columns: 1fr; }
  .apps-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  .admin-gallery-grid { grid-template-columns: 1fr; }
  .iitm-card { flex-direction: column; text-align: center; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .hero-title { font-size: 2.4rem; }
  .hero-metrics { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .form-row { grid-template-columns: 1fr; }
}