/* ================================================================
   PORTFOLIO — Custom CSS
   Design: Light mode, slate-blue accent (#3b7cff), modern & premium
================================================================ */

/* ── Variables ── */
:root {
  --accent: #3b7cff;
  --accent-light: #6b9fff;
  --accent-dark: #2563eb;
  --bg-body: #f5f7fb;
  --bg-dark-alt: #eef1f8;
  --bg-card: #ffffff;
  --bg-card-hover: #f0f4ff;
  --text-primary: #1a2340;
  --text-secondary: #5a6a8a;
  --border-color: rgba(59, 124, 255, 0.15);
  --shadow-accent: 0 0 30px rgba(59, 124, 255, 0.14);
  --radius-card: 16px;
  --radius-sm: 8px;
  --transition: 0.3s ease;
  --font-main: 'Inter', sans-serif;
  --font-code: 'Fira Code', monospace;
}

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-main);
  background-color: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

::selection {
  background: var(--accent);
  color: #fff;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-body); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 3px; }

/* ── Utility ── */
.text-accent { color: var(--accent) !important; }
.bg-dark-alt { background-color: var(--bg-dark-alt) !important; }

.text-gradient {
  background: linear-gradient(135deg, var(--accent) 0%, #7c3aed 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-padding { padding: 100px 0; }

/* ================================================================
   NAVBAR
================================================================ */
.navbar {
  background: rgba(245, 247, 251, 0.6);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition), padding var(--transition);
}

.navbar.scrolled {
  background: rgba(245, 247, 251, 0.97);
  border-bottom-color: var(--border-color);
  box-shadow: 0 4px 24px rgba(59, 124, 255, 0.1);
  padding-top: 0.5rem !important;
  padding-bottom: 0.5rem !important;
}

/* Override Bootstrap dark navbar for light theme */
.navbar-dark .navbar-nav .nav-link,
.navbar-dark .navbar-brand {
  color: var(--text-primary) !important;
}

#nav-logo {
  font-family: var(--font-code);
  font-size: 1.3rem;
  letter-spacing: 0.5px;
  color: var(--text-primary) !important;
  text-decoration: none;
  transition: opacity var(--transition);
}
#nav-logo:hover { opacity: 0.7; }

.navbar-nav .nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary) !important;
  position: relative;
  transition: color var(--transition);
}

.navbar-nav .nav-link::after {
  content: '';
  position: absolute;
  bottom: 0; left: 50%; right: 50%;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: left var(--transition), right var(--transition);
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
  color: var(--text-primary) !important;
}
.navbar-nav .nav-link:hover::after,
.navbar-nav .nav-link.active::after { left: 12px; right: 12px; }

/* Hamburger icon for light mode */
.navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(26,35,64,0.75)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e") !important;
}

/* ── CTA Button ── */
.btn-accent {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  color: #fff !important;
  border: none;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.3px;
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
}
.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(59, 124, 255, 0.38);
  filter: brightness(1.1);
}

.btn-outline-accent {
  background: transparent;
  color: var(--accent) !important;
  border: 2px solid var(--accent);
  border-radius: 50px;
  font-weight: 600;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}
.btn-outline-accent:hover {
  background: var(--accent);
  color: #fff !important;
  transform: translateY(-2px);
}

/* ── Outline light btn override for light mode ── */
.btn-outline-light {
  color: var(--accent) !important;
  border-color: var(--accent) !important;
}
.btn-outline-light:hover {
  background: var(--accent) !important;
  color: #fff !important;
}

/* ================================================================
   HERO SECTION
================================================================ */
.hero-section {
  position: relative;
  background: radial-gradient(ellipse 80% 80% at 50% -20%, rgba(59,124,255,0.12) 0%, transparent 70%),
              var(--bg-body);
  overflow: hidden;
}

.hero-bg-blur {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle 600px at 20% 60%, rgba(59,124,255,0.07) 0%, transparent 70%),
    radial-gradient(circle 400px at 80% 30%, rgba(124,58,237,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  background: rgba(59, 124, 255, 0.1);
  border: 1px solid var(--border-color);
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 50px;
  letter-spacing: 0.3px;
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.5px;
}

.hero-role {
  font-family: var(--font-code);
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  color: var(--text-secondary);
}
.typed-prefix { color: var(--accent); }
.typed-cursor {
  display: inline-block;
  animation: blink 0.8s step-start infinite;
  color: var(--accent);
}
@keyframes blink { 50% { opacity: 0; } }

.hero-slogan {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 520px;
}

/* ── Avatar ── */
.hero-avatar-wrapper {
  position: relative;
  width: 320px;
  height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-avatar-ring {
  position: absolute;
  inset: -12px;
  border-radius: 50%;
  border: 3px solid transparent;
  background: linear-gradient(135deg, var(--accent), #7c3aed) border-box;
  -webkit-mask:
    linear-gradient(#fff 0 0) padding-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: destination-out;
  mask-composite: exclude;
  animation: spin-ring 8s linear infinite;
}
@keyframes spin-ring { to { transform: rotate(360deg); } }

.hero-avatar {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  object-fit: cover;
  object-position: top;
  border: 4px solid #fff;
  box-shadow: 0 8px 40px rgba(59,124,255,0.18);
  transition: transform var(--transition);
}
.hero-avatar:hover { transform: scale(1.03); }

.avatar-badge {
  position: absolute;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: 50px;
  padding: 6px 16px;
  font-size: 0.78rem;
  font-weight: 600;
  white-space: nowrap;
  box-shadow: 0 4px 16px rgba(59,124,255,0.12);
  color: var(--text-primary);
}

/* ── Social icons (hero) ── */
.social-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--border-color);
  color: var(--text-secondary) !important;
  font-size: 1.1rem;
  text-decoration: none;
  transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 2px 8px rgba(59,124,255,0.08);
}
.social-icon:hover {
  background: var(--accent);
  color: #fff !important;
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(59,124,255,0.3);
}

/* ── Scroll down ── */
.scroll-down-btn {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-secondary);
  font-size: 1.3rem;
  text-decoration: none;
  animation: bounce-down 2s ease-in-out infinite;
  transition: color var(--transition);
}
.scroll-down-btn:hover { color: var(--accent); }
@keyframes bounce-down {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ================================================================
   SECTION HEADERS
================================================================ */
.section-tag {
  font-family: var(--font-code);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 2px;
  text-transform: uppercase;
  display: block;
  margin-bottom: 10px;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.3px;
  margin-bottom: 0;
  color: var(--text-primary);
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-top: 12px;
  margin-bottom: 0;
}

.section-header {
  position: relative;
}
.section-header::after {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), #7c3aed);
  border-radius: 2px;
  margin: 16px auto 0;
}

/* ================================================================
   ABOUT SECTION
================================================================ */
.about-img-wrapper {
  position: relative;
  display: inline-block;
}

.about-img {
  width: 100%;
  max-width: 360px;
  border-radius: 20px;
  object-fit: cover;
  object-position: top;
  box-shadow: 20px 20px 60px rgba(59,124,255,0.12), 0 4px 20px rgba(0,0,0,0.07);
  transition: transform var(--transition);
}
.about-img:hover { transform: scale(1.02); }

.about-exp-badge {
  position: absolute;
  bottom: -16px;
  right: -16px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  border-radius: var(--radius-card);
  padding: 16px 24px;
  text-align: center;
  box-shadow: 0 8px 32px rgba(59,124,255,0.35);
  color: #fff;
}
.exp-number { display: block; font-size: 1.8rem; font-weight: 800; line-height: 1; }
.exp-label { font-size: 0.75rem; font-weight: 500; opacity: 0.9; }

.about-intro {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
}
.about-intro strong { color: var(--text-primary); }

.about-info-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 2px 8px rgba(59,124,255,0.05);
}
.about-info-card:hover { border-color: var(--accent); transform: translateX(4px); box-shadow: var(--shadow-accent); }
.about-info-card i { font-size: 1.3rem; }
.info-label { display: block; font-size: 0.72rem; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 1px; }
.info-value { display: block; font-size: 0.9rem; font-weight: 600; color: var(--text-primary); }

/* ================================================================
   SKILLS SECTION
================================================================ */
.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 2px 12px rgba(59,124,255,0.06);
}
.skill-card:hover {
  border-color: var(--accent);
  transform: translateY(-6px);
  box-shadow: var(--shadow-accent);
}

.skill-card-icon {
  width: 52px; height: 52px;
  border-radius: 12px;
  background: rgba(59,124,255,0.08);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  color: var(--icon-color, var(--accent));
  margin-bottom: 16px;
}

.skill-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.skill-list {
  list-style: none;
  padding: 0; margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.78rem;
  font-weight: 600;
  background: rgba(59,124,255,0.06);
  color: var(--text-primary);
  border: 1px solid;
  border-color: var(--tag-color, var(--accent));
  transition: background var(--transition), transform var(--transition), color var(--transition);
}
.skill-tag:hover {
  background: var(--tag-color, var(--accent));
  color: #fff;
  transform: scale(1.05);
}

/* ================================================================
   PROJECTS SECTION
================================================================ */
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
  box-shadow: 0 2px 12px rgba(59,124,255,0.06);
}
.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-8px);
  box-shadow: 0 16px 48px rgba(59,124,255,0.16);
}

.project-img-wrapper {
  position: relative;
  overflow: hidden;
  aspect-ratio: 5/3;
}

.project-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.project-card:hover .project-img { transform: scale(1.08); }

.project-overlay {
  position: absolute;
  inset: 0;
  background: rgba(26, 35, 64, 0.72);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
}
.project-card:hover .project-overlay { opacity: 1; }

.project-body {
  padding: 22px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.project-role {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.project-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.project-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 16px;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tech-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 600;
  background: rgba(59, 124, 255, 0.08);
  color: var(--accent-dark);
  border: 1px solid rgba(59, 124, 255, 0.2);
}

/* ================================================================
   CONTACT SECTION
================================================================ */
.contact-info-item {
  display: flex;
  align-items: center;
  gap: 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  padding: 18px 22px;
  text-decoration: none;
  color: var(--text-primary) !important;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 2px 8px rgba(59,124,255,0.05);
}
.contact-info-item:hover {
  border-color: var(--accent);
  transform: translateX(6px);
  box-shadow: var(--shadow-accent);
}

.contact-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: var(--icon-bg, var(--accent));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
  color: #fff;
  flex-shrink: 0;
}

.contact-text { flex: 1; }
.contact-label { display: block; font-size: 0.72rem; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 2px; }
.contact-value { display: block; font-size: 0.88rem; font-weight: 600; color: var(--text-primary); }
.contact-arrow { color: var(--text-secondary); transition: transform var(--transition), color var(--transition); }
.contact-info-item:hover .contact-arrow { transform: translateX(4px); color: var(--accent); }

/* ── Contact Form ── */
.contact-form .form-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.custom-input {
  background: var(--bg-card) !important;
  border: 1px solid var(--border-color) !important;
  border-radius: var(--radius-sm) !important;
  color: var(--text-primary) !important;
  padding: 12px 16px !important;
  font-size: 0.9rem !important;
  transition: border-color var(--transition), box-shadow var(--transition) !important;
}
.custom-input::placeholder { color: rgba(90,106,138,0.5) !important; }
.custom-input:focus {
  border-color: var(--accent) !important;
  box-shadow: 0 0 0 3px rgba(59,124,255,0.15) !important;
  outline: none !important;
}

.submit-btn {
  position: relative;
  overflow: hidden;
}
.submit-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition);
}
.submit-btn:hover::before { opacity: 1; }

/* ================================================================
   FOOTER
================================================================ */
.footer {
  background: var(--bg-dark-alt);
  border-top: 1px solid var(--border-color);
}
.footer-logo {
  font-family: var(--font-code);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
}
.footer-copy {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.social-icon-sm {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary) !important;
  font-size: 0.9rem;
  text-decoration: none;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}
.social-icon-sm:hover {
  background: var(--accent);
  color: #fff !important;
  transform: translateY(-2px);
}

/* ================================================================
   BACK TO TOP BUTTON
================================================================ */
.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 24px;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  color: #fff;
  border: none;
  font-size: 1rem;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(59,124,255,0.35);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition);
  z-index: 999;
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover { filter: brightness(1.15); transform: translateY(-2px); }

/* ================================================================
   SCROLL-REVEAL ANIMATION
================================================================ */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.reveal-on-scroll.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ================================================================
   RESPONSIVE
================================================================ */
@media (max-width: 991.98px) {
  .section-padding { padding: 70px 0; }
  .hero-avatar-wrapper { width: 240px; height: 240px; }
  .hero-avatar { width: 216px; height: 216px; }
}

@media (max-width: 767.98px) {
  .section-padding { padding: 60px 0; }
  .about-img { max-width: 280px; }
  .about-exp-badge { right: 0; bottom: -12px; padding: 12px 18px; }
  .hero-avatar-wrapper { width: 200px; height: 200px; }
  .hero-avatar { width: 180px; height: 180px; }
  .hero-cta .btn { width: 100%; max-width: 280px; }
}