/* ================================================================
   DHRUVA HEGDE – PORTFOLIO WEBSITE
   style.css | Root Variables + Global Styles + All Sections
   ================================================================ */

/* ── CSS VARIABLES ── */
:root {
  --bg-base: #0a0f1e;
  --bg-surface: #0d1428;
  --bg-card: #111827;
  --bg-card-hover: #161f36;
  --border: #1e2d4a;
  --border-light: #243255;

  --primary: #6366f1;
  --primary-light: #818cf8;
  --primary-dark: #4f46e5;
  --secondary: #06b6d4;
  --accent: #f59e0b;
  --success: #10b981;
  --danger: #f43f5e;

  --grad-start: #6366f1;
  --grad-end: #06b6d4;

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-full: 9999px;

  --shadow-card: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 30px rgba(99,102,241,0.25);
  --nav-h: 72px;

  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
}

body[data-theme='light'] {
  --bg-base: #eef4ff;
  --bg-surface: #f8fbff;
  --bg-card: #ffffff;
  --bg-card-hover: #f2f7ff;
  --border: #d6e1f2;
  --border-light: #b9cae7;

  --primary: #4f46e5;
  --primary-light: #6366f1;
  --primary-dark: #3730a3;
  --secondary: #0891b2;
  --accent: #d97706;
  --success: #059669;
  --danger: #e11d48;

  --grad-start: #4f46e5;
  --grad-end: #0891b2;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;

  --shadow-card: 0 10px 30px rgba(15, 23, 42, 0.08);
  --shadow-glow: 0 10px 35px rgba(79, 70, 229, 0.16);
}

/* ── RESET & BASE ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); }

body {
  font-family: var(--font-body);
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition), color var(--transition);
}

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

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }

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

img { max-width: 100%; display: block; }

/* ── CONTAINER ── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── GRADIENT TEXT ── */
.gradient-text {
  background: linear-gradient(135deg, var(--grad-start), var(--grad-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 600;
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  box-shadow: 0 4px 20px rgba(99,102,241,0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(99,102,241,0.5);
}

.btn-secondary {
  background: transparent;
  border-color: var(--border-light);
  color: var(--text-primary);
}
.btn-secondary:hover {
  border-color: var(--primary);
  background: rgba(99,102,241,0.1);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  border-color: var(--border-light);
  color: var(--text-secondary);
  padding: 10px 22px;
  font-size: 0.875rem;
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary-light);
}

.btn-full { width: 100%; justify-content: center; }

/* ── SECTION ── */
.section { padding: 100px 0; }

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--secondary);
  display: block;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(2rem, 5vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.section-line {
  width: 60px;
  height: 4px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 2px;
  margin: 0 auto;
}

/* ── TAGS ── */
.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 600;
  background: rgba(99,102,241,0.12);
  border: 1px solid rgba(99,102,241,0.25);
  color: var(--primary-light);
}
.tag-gold { background: rgba(245,158,11,0.12); border-color: rgba(245,158,11,0.3); color: #fbbf24; }
.tag-blue { background: rgba(6,182,212,0.12); border-color: rgba(6,182,212,0.3); color: #22d3ee; }
.tag-green { background: rgba(16,185,129,0.12); border-color: rgba(16,185,129,0.3); color: #34d399; }

/* ================================================================
   NAVBAR
   ================================================================ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  background: transparent;
  transition: background 0.4s ease, backdrop-filter 0.4s ease, box-shadow 0.4s ease;
}

.navbar.scrolled {
  background: rgba(10,15,30,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--border);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}
.logo-bracket { color: var(--primary); }

.nav-links {
  display: flex;
  list-style: none;
  gap: 8px;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  transition: var(--transition);
}
.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
  background: rgba(99,102,241,0.1);
}

.theme-toggle {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--border-light);
  background: rgba(99,102,241,0.08);
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  cursor: pointer;
  transition: var(--transition);
}

.theme-toggle:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}

.theme-icon {
  position: absolute;
  transition: opacity var(--transition), transform var(--transition);
}

.theme-icon-light {
  opacity: 0;
  transform: scale(0.6) rotate(-20deg);
}

.theme-icon-dark {
  opacity: 1;
  transform: scale(1) rotate(0deg);
}

body[data-theme='light'] .theme-icon-light {
  opacity: 1;
  transform: scale(1) rotate(0deg);
}

body[data-theme='light'] .theme-icon-dark {
  opacity: 0;
  transform: scale(0.6) rotate(20deg);
}

body[data-theme='light'] .grid-overlay {
  background-image:
    linear-gradient(rgba(79,70,229,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79,70,229,0.06) 1px, transparent 1px);
}

body[data-theme='light'] .hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(245, 158, 11, 0.08), transparent 30%);
  pointer-events: none;
}

body[data-theme='light'] .navbar.scrolled {
  background: rgba(248,251,255,0.88);
}

body[data-theme='light'] .blob {
  opacity: 0.18;
}

body[data-theme='light'] .contact-form,
body[data-theme='light'] .project-card,
body[data-theme='light'] .achievement-card,
body[data-theme='light'] .skill-card,
body[data-theme='light'] .certificate-card,
body[data-theme='light'] .contact-item,
body[data-theme='light'] .about-image-card,
body[data-theme='light'] .floating-badge,
body[data-theme='light'] .about-stat-card {
  box-shadow: var(--shadow-card);
}

body[data-theme='light'] .form-input {
  background: #f8fbff;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ================================================================
   HERO
   ================================================================ */
.hero {
  min-height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  padding: var(--nav-h) 24px 0;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(99,102,241,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99,102,241,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.25;
  animation: float 8s ease-in-out infinite;
}
.blob-1 { width: 500px; height: 500px; background: radial-gradient(circle, var(--primary), transparent); top: -100px; right: -100px; animation-delay: 0s; }
.blob-2 { width: 350px; height: 350px; background: radial-gradient(circle, var(--secondary), transparent); bottom: 50px; left: -80px; animation-delay: 3s; }
.blob-3 { width: 250px; height: 250px; background: radial-gradient(circle, #f59e0b, transparent); top: 40%; left: 40%; animation-delay: 5s; }

@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-30px) scale(1.05); }
}

.hero-content {
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(16,185,129,0.1);
  border: 1px solid rgba(16,185,129,0.25);
  color: #34d399;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 20px;
}
.badge-dot {
  width: 8px; height: 8px;
  background: #10b981;
  border-radius: 50%;
  animation: pulse-dot 2s ease infinite;
}
@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.7; }
}

.hero-title {
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: 14px;
}

.hero-subtitle {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--text-secondary);
  margin-bottom: 20px;
  min-height: 1.8em;
}

.hero-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.75;
  margin-bottom: 32px;
}

.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.hero-socials { display: flex; gap: 12px; }

.social-icon {
  width: 42px; height: 42px;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 1rem;
  transition: var(--transition);
}
.social-icon:hover {
  border-color: var(--primary);
  color: var(--primary-light);
  background: rgba(99,102,241,0.1);
  transform: translateY(-2px);
}

/* Avatar */
.hero-avatar {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.avatar-ring {
  width: 240px; height: 240px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  padding: 4px;
  animation: rotate-ring 10s linear infinite;
}

@keyframes rotate-ring {
  0% { box-shadow: 0 0 25px rgba(99,102,241,0.5), 0 0 50px rgba(6,182,212,0.2); }
  50% { box-shadow: 0 0 40px rgba(6,182,212,0.5), 0 0 70px rgba(99,102,241,0.2); }
  100% { box-shadow: 0 0 25px rgba(99,102,241,0.5), 0 0 50px rgba(6,182,212,0.2); }
}

.avatar-inner {
  width: 100%; height: 100%;
  border-radius: 50%;
  background: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.avatar-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  border-radius: 50%;
}

.avatar-initials {
  font-size: 4.5rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-family: var(--font-mono);
  letter-spacing: -0.05em;
}

.floating-badge {
  position: absolute;
  background: var(--bg-card);
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  font-size: 0.78rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: var(--shadow-card);
  color: var(--text-secondary);
  animation: badgeFloat 3s ease-in-out infinite;
}
.badge-top { top: 0; right: -20px; animation-delay: 0s; }
.badge-bottom { bottom: 0; left: -20px; animation-delay: 1.5s; }
.floating-badge i { color: var(--primary); }

@keyframes badgeFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 1px;
  text-transform: uppercase;
  animation: fadeInUp 1s ease 1.5s both;
}
.scroll-arrow {
  width: 32px; height: 32px;
  border-radius: 50%;
  border: 1.5px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  animation: bounce-arrow 2s ease infinite;
  color: var(--text-muted);
}
@keyframes bounce-arrow {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateX(-50%) translateY(20px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ================================================================
   ABOUT
   ================================================================ */
.about { background: var(--bg-surface); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 70px;
  align-items: center;
}

.about-image-wrap {
  position: relative;
  display: flex;
  justify-content: center;
}

.about-image-card {
  width: 260px; height: 310px;
  background: linear-gradient(135deg, var(--bg-card), var(--bg-card-hover));
  border-radius: var(--radius-lg);
  border: 1.5px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.about-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
  position: relative;
  z-index: 1;
}

.about-image-border {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  opacity: 0.15;
}

.about-initials-large {
  font-size: 5rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-family: var(--font-mono);
  letter-spacing: -0.05em;
  z-index: 1;
}


.about-stat-card {
  position: absolute;
  background: var(--bg-card);
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  box-shadow: var(--shadow-card);
  text-align: center;
}
.stat-1 { bottom: 30px; right: -20px; }
.stat-2 { top: 30px; left: -20px; }
.stat-number { display: block; font-size: 1.6rem; font-weight: 800; color: var(--primary-light); }
.stat-label { font-size: 0.7rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }

.about-bio {
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.8;
}
.about-bio strong { color: var(--text-primary); }

.about-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 28px 0 32px;
}

.detail-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.detail-item > i {
  color: var(--primary);
  margin-top: 3px;
  font-size: 1rem;
  flex-shrink: 0;
}
.detail-label { display: block; font-size: 0.72rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }
.detail-value { font-size: 0.88rem; color: var(--text-primary); font-weight: 500; }

/* ================================================================
   SKILLS
   ================================================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}

.skill-card {
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: var(--transition);
  cursor: default;
  position: relative;
  overflow: hidden;
}
.skill-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transform: scaleX(0);
  transition: var(--transition);
}
.skill-card:hover::before { transform: scaleX(1); }
.skill-card:hover {
  border-color: var(--border-light);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.skill-icon-wrap {
  width: 52px; height: 52px;
  border-radius: var(--radius-sm);
  background: rgba(99,102,241,0.12);
  border: 1.5px solid rgba(99,102,241,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.skill-icon { font-size: 1.4rem; color: var(--primary-light); }

.skill-name {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.skill-desc {
  font-size: 0.83rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}
.skill-tags { display: flex; gap: 6px; flex-wrap: wrap; }

/* ================================================================
   ACHIEVEMENTS
   ================================================================ */
.achievements { background: var(--bg-surface); }

.achievements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.achievement-card {
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px;
  display: flex;
  gap: 22px;
  transition: var(--transition);
}
.achievement-card:hover {
  border-color: var(--border-light);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.achievement-icon-wrap {
  width: 52px; height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}
.achievement-icon-wrap.hackathon { background: rgba(245,158,11,0.12); border: 1.5px solid rgba(245,158,11,0.25); color: #fbbf24; }
.achievement-icon-wrap.nptel { background: rgba(6,182,212,0.12); border: 1.5px solid rgba(6,182,212,0.25); color: #22d3ee; }
.achievement-icon-wrap.intern { background: rgba(99,102,241,0.12); border: 1.5px solid rgba(99,102,241,0.25); color: var(--primary-light); }

.achievement-badge {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.achievement-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 6px;
  line-height: 1.3;
}
.achievement-org {
  font-size: 0.8rem;
  color: var(--secondary);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.achievement-desc {
  font-size: 0.83rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 14px;
}
.achievement-tags { display: flex; gap: 6px; flex-wrap: wrap; }

/* ================================================================
   CERTIFICATES
   ================================================================ */
.certificates-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  perspective: 1200px;
}

.certificate-card {
  position: relative;
  min-height: 320px;
  border-radius: var(--radius-lg);
  border: 1.5px solid var(--border);
  background:
    radial-gradient(circle at top left, rgba(99,102,241,0.12), transparent 35%),
    linear-gradient(145deg, rgba(17,24,39,0.98), rgba(13,20,40,0.96));
  overflow: hidden;
  transform-style: preserve-3d;
  transition: transform 0.18s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  box-shadow: var(--shadow-card);
}

.certificate-card::before {
  content: '';
  position: absolute;
  inset: 1px;
  border-radius: calc(var(--radius-lg) - 2px);
  border: 1px solid rgba(255,255,255,0.05);
  pointer-events: none;
}

.certificate-card:hover {
  border-color: var(--primary-light);
  box-shadow: 0 22px 55px rgba(3, 10, 28, 0.65), 0 0 35px rgba(99,102,241,0.2);
}

.certificate-glow {
  position: absolute;
  inset: auto -60px -80px auto;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  filter: blur(6px);
  opacity: 0.5;
}

.certificate-glow.python { background: radial-gradient(circle, rgba(245,158,11,0.45), transparent 70%); }
.certificate-glow.cyber { background: radial-gradient(circle, rgba(6,182,212,0.38), transparent 70%); }
.certificate-glow.cprog { background: radial-gradient(circle, rgba(16,185,129,0.35), transparent 70%); }

.certificate-frame {
  position: relative;
  z-index: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 28px;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.03), transparent 30%),
    linear-gradient(135deg, transparent, rgba(99,102,241,0.06));
}

.certificate-image-wrap {
  position: relative;
  margin-bottom: 22px;
  border-radius: calc(var(--radius-md) + 2px);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.03);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.32);
  transform: translateZ(28px);
}

.certificate-image {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: center;
  display: block;
  transition: transform 0.35s ease;
}

.certificate-card:hover .certificate-image {
  transform: scale(1.04);
}

.certificate-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 24px;
  font-size: 0.78rem;
  letter-spacing: 1.4px;
  text-transform: uppercase;
}

.certificate-provider {
  color: var(--secondary);
  font-family: var(--font-mono);
}

.certificate-year {
  color: var(--text-muted);
  font-weight: 700;
}

.certificate-name {
  font-size: 1.35rem;
  line-height: 1.3;
  font-weight: 800;
  margin-bottom: 18px;
}

.certificate-meta {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 10px;
}

.certificate-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

/* ================================================================
   PROJECTS
   ================================================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 22px;
}

.project-card {
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.project-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(99,102,241,0.05), transparent);
  opacity: 0;
  transition: var(--transition);
  pointer-events: none;
}
.project-card:hover::after { opacity: 1; }
.project-card:hover {
  border-color: var(--border-light);
  transform: translateY(-5px);
  box-shadow: var(--shadow-glow);
}
.project-card.featured {
  border-color: rgba(99,102,241,0.4);
}
.project-card.add-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 14px;
  border-style: dashed;
  border-color: var(--border);
  color: var(--text-muted);
  cursor: default;
}
.add-icon { font-size: 2.5rem; color: var(--border-light); }
.add-card p { font-size: 0.88rem; }

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

.project-icon-wrap {
  width: 46px; height: 46px;
  border-radius: var(--radius-sm);
  background: rgba(99,102,241,0.12);
  border: 1.5px solid rgba(99,102,241,0.2);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary-light);
  font-size: 1.2rem;
}

.project-links { display: flex; gap: 8px; }
.project-link {
  width: 34px; height: 34px;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--border-light);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: var(--transition);
}
.project-link:hover { border-color: var(--primary); color: var(--primary-light); }

.project-badge {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  background: rgba(99,102,241,0.12);
  border: 1px solid rgba(99,102,241,0.25);
  color: var(--primary-light);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  margin-bottom: 10px;
}
.project-badge.coming {
  background: rgba(245,158,11,0.1);
  border-color: rgba(245,158,11,0.25);
  color: #fbbf24;
}

.project-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.project-desc {
  font-size: 0.83rem;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 20px;
}

.project-tech { display: flex; gap: 8px; flex-wrap: wrap; }
.tech-tag {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: rgba(6,182,212,0.1);
  border: 1px solid rgba(6,182,212,0.2);
  color: #22d3ee;
  font-family: var(--font-mono);
}

/* ================================================================
   CONTACT
   ================================================================ */
.contact { background: var(--bg-surface); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 60px;
  align-items: start;
}

.contact-intro {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 36px;
}

.contact-details { display: flex; flex-direction: column; gap: 16px; }

.contact-item {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 16px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--border);
  background: var(--bg-card);
  transition: var(--transition);
}
.contact-item:hover {
  border-color: var(--primary);
  background: var(--bg-card-hover);
  transform: translateX(4px);
}

.contact-icon-wrap {
  width: 44px; height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(99,102,241,0.12);
  border: 1.5px solid rgba(99,102,241,0.2);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary-light);
  flex-shrink: 0;
}

.contact-label { display: block; font-size: 0.7rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }
.contact-value { font-size: 0.88rem; color: var(--text-primary); font-weight: 500; }

/* Form */
.contact-form {
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
}

.form-group { margin-bottom: 22px; }

.form-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.form-input {
  width: 100%;
  background: var(--bg-surface);
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.92rem;
  padding: 12px 16px;
  transition: var(--transition);
  outline: none;
}
.form-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.1);
}
.form-input.error { border-color: var(--danger); }
.form-textarea { resize: vertical; min-height: 120px; }

.form-error {
  display: block;
  font-size: 0.75rem;
  color: var(--danger);
  margin-top: 5px;
  min-height: 18px;
}

.form-success {
  display: none;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--success);
  margin-top: 14px;
  padding: 12px 16px;
  background: rgba(16,185,129,0.1);
  border: 1px solid rgba(16,185,129,0.25);
  border-radius: var(--radius-sm);
}
.form-success.show { display: flex; }

/* ================================================================
   FOOTER
   ================================================================ */
.footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
}
.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 20px;
}
.footer-brand {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
}
.footer-text { font-size: 0.88rem; color: var(--text-secondary); }
.footer-socials { display: flex; gap: 12px; }
.footer-socials a {
  width: 38px; height: 38px;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--border-light);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: var(--transition);
}
.footer-socials a:hover { border-color: var(--primary); color: var(--primary-light); }
.footer-copy {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-align: center;
}

/* ================================================================
   BACK TO TOP
   ================================================================ */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 999;
  width: 46px; height: 46px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border: none;
  color: #fff;
  cursor: pointer;
  font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: var(--transition);
  box-shadow: 0 4px 16px rgba(99,102,241,0.45);
}
.back-to-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(99,102,241,0.6); }

/* ================================================================
   ANIMATIONS – SCROLL REVEAL
   ================================================================ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 900px) {
  .hero-content { grid-template-columns: 1fr; text-align: center; gap: 40px; }
  .hero-text { order: 2; }
  .hero-avatar { order: 1; }
  .hero-desc { margin-inline: auto; }
  .hero-cta, .hero-socials { justify-content: center; }

  .about-grid { grid-template-columns: 1fr; gap: 48px; text-align: center; }
  .about-details { grid-template-columns: 1fr; }
  .detail-item { justify-content: center; text-align: left; }

  .contact-grid { grid-template-columns: 1fr; }

  .footer-content { flex-direction: column; text-align: center; }

  .badge-top { right: 0; }
  .badge-bottom { left: 0; }
}

@media (max-width: 640px) {
  .section { padding: 70px 0; }

  .hamburger { display: flex; }

  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: rgba(10,15,30,0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    padding: 24px;
    gap: 4px;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .avatar-ring { width: 180px; height: 180px; }
  .avatar-initials { font-size: 3.2rem; }

  .achievements-grid { grid-template-columns: 1fr; }
  .achievement-card { flex-direction: column; }
  .certificate-card { min-height: 280px; }
  .certificate-frame { padding: 22px; }
  .certificate-name { font-size: 1.15rem; }

  .hero-cta { flex-direction: column; align-items: center; }

  .contact-form { padding: 24px; }

  .back-to-top { bottom: 20px; right: 20px; }
}