/* ═══════════════════════════════════════════════════════════
   KONDA DINESH — PORTFOLIO
   Theme: Dark-first, glassmorphism + sharp grid aesthetic
   Fonts: Syne (display) + DM Sans (body) + DM Mono (code/accents)
═══════════════════════════════════════════════════════════ */

/* ── 1. CSS Variables ────────────────────────────────────── */
:root {
  --bg:           #0a0b0f;
  --bg-2:         #0f1117;
  --bg-3:         #13151e;
  --surface:      rgba(255,255,255,0.04);
  --surface-hover:rgba(255,255,255,0.08);
  --border:       rgba(255,255,255,0.08);
  --border-hover: rgba(255,255,255,0.18);

  --text:         #eef0f7;
  --text-muted:   #8891aa;
  --text-dim:     #4e5568;

  --accent:       #5d7bfa;
  --accent-2:     #a78bfa;
  --accent-3:     #34d399;
  --accent-glow:  rgba(93,123,250,0.3);

  --devops-color: #5d7bfa;
  --ml-color:     #f472b6;
  --snow-color:   #34d399;
  --ibm-color:    #0f62fe;
  --aws-color:    #ff9900;
  --google-color: #34a853;
  --ms-color:     #00a4ef;

  --radius:       12px;
  --radius-lg:    20px;
  --radius-xl:    28px;

  --nav-h:        64px;
  --transition:   0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
  --bg:           #f5f6fa;
  --bg-2:         #eceef5;
  --bg-3:         #ffffff;
  --surface:      rgba(0,0,0,0.04);
  --surface-hover:rgba(0,0,0,0.07);
  --border:       rgba(0,0,0,0.08);
  --border-hover: rgba(0,0,0,0.15);

  --text:         #0d0f1a;
  --text-muted:   #5a6080;
  --text-dim:     #9ba3bf;

  --accent-glow:  rgba(93,123,250,0.15);
}

/* ── 2. Reset & Base ─────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; }
button { cursor: pointer; font-family: inherit; }

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

section {
  padding: 100px 0;
}

/* ── 3. Scrollbar ────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 99px; }

/* ── 4. Typography ───────────────────────────────────────── */
h1, h2, h3 { font-family: 'Syne', sans-serif; line-height: 1.15; }

.section-label {
  font-family: 'DM Mono', monospace;
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 520px;
}

.section-header {
  margin-bottom: 60px;
}

.dot { color: var(--accent); }

/* ── 5. Buttons ──────────────────────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius);
  font-family: 'Syne', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  box-shadow: 0 0 0 0 var(--accent-glow);
  white-space: nowrap;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--accent-glow);
  background: #7b96ff;
}
.btn-primary.full-width { width: 100%; justify-content: center; }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 26px;
  border: 1.5px solid var(--border-hover);
  border-radius: var(--radius);
  font-family: 'Syne', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
  background: transparent;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
}
.btn-ghost:hover {
  border-color: var(--accent);
  background: var(--surface);
  transform: translateY(-2px);
}

.btn-resume {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border: 1.5px solid var(--border-hover);
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 600;
  font-family: 'Syne', sans-serif;
  transition: border-color var(--transition), background var(--transition);
}
.btn-resume:hover { border-color: var(--accent); background: var(--surface); }

/* ── 6. Navbar ───────────────────────────────────────────── */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition);
}
#navbar.scrolled {
  background: rgba(10,11,15,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--border);
}
[data-theme="light"] #navbar.scrolled {
  background: rgba(245,246,250,0.85);
}

.nav-inner {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-logo {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.4rem;
  letter-spacing: -0.02em;
  margin-right: auto;
}

.nav-links {
  display: flex;
  gap: 32px;
}
.nav-links a {
  font-family: 'DM Mono', monospace;
  font-size: 0.82rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  transition: color var(--transition);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0;
  width: 0; height: 1.5px;
  background: var(--accent);
  transition: width var(--transition);
}
.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { width: 100%; }

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

#theme-toggle {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: 50%;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: all var(--transition);
}
#theme-toggle:hover { border-color: var(--accent); color: var(--accent); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 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); }

.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 0;
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  padding: 12px 24px 20px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  padding: 12px 0;
  font-family: 'Syne', sans-serif;
  font-weight: 600;
  font-size: 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
  transition: color var(--transition);
}
.mobile-menu a:hover { color: var(--accent); }

/* ── 7. Hero ─────────────────────────────────────────────── */
#hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  position: relative;
  padding: 0 24px;
  overflow: hidden;
}

/* Background */
.hero-bg { position: absolute; inset: 0; z-index: 0; overflow: hidden; }

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black, transparent);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black, transparent);
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}
.orb-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(93,123,250,0.2) 0%, transparent 70%);
  top: -100px; left: -100px;
  animation: orbFloat 8s ease-in-out infinite;
}
.orb-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(167,139,250,0.15) 0%, transparent 70%);
  bottom: 0; right: 0;
  animation: orbFloat 10s ease-in-out infinite reverse;
}
.orb-3 {
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(52,211,153,0.12) 0%, transparent 70%);
  top: 50%; left: 60%;
  animation: orbFloat 12s ease-in-out infinite;
}
@keyframes orbFloat {
  0%, 100% { transform: translateY(0) scale(1); }
  50%       { transform: translateY(-30px) scale(1.05); }
}

.hero-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  max-width: 820px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px 6px 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 99px;
  font-family: 'DM Mono', monospace;
  font-size: 0.78rem;
  color: var(--text-muted);
  backdrop-filter: blur(8px);
}
.badge-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent-3);
  box-shadow: 0 0 8px var(--accent-3);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.6; transform: scale(0.8); }
}

.hero-name {
  font-size: clamp(3.5rem, 10vw, 7rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
}
.name-first { color: var(--text); }
.name-last {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
}

.hero-title {
  font-family: 'DM Mono', monospace;
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  color: var(--accent);
  letter-spacing: 0.04em;
  min-height: 2em;
}
.cursor {
  display: inline-block;
  animation: blink 1s step-end infinite;
  color: var(--accent-3);
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

.hero-tagline {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-muted);
  max-width: 500px;
}
.hero-tagline em { color: var(--text); font-style: normal; font-weight: 500; }

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 8px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-top: 24px;
  padding: 20px 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  flex-wrap: wrap;
  justify-content: center;
}
.stat { text-align: center; }
.stat-num {
  display: block;
  font-family: 'Syne', sans-serif;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}
.stat-label {
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 4px;
}
.stat-divider {
  width: 1px;
  height: 36px;
  background: var(--border);
}

.hero-scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 1;
}
.hero-scroll-hint span {
  font-family: 'DM Mono', monospace;
  font-size: 0.68rem;
  color: var(--text-dim);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}
.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--text-dim), transparent);
  animation: scrollLine 1.8s ease-in-out infinite;
}
@keyframes scrollLine {
  0%   { transform: scaleY(0); transform-origin: top; }
  50%  { transform: scaleY(1); transform-origin: top; }
  50.01%{ transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ── 8. About ────────────────────────────────────────────── */
#about { background: var(--bg-2); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-bio {
  color: var(--text-muted);
  margin-bottom: 16px;
  line-height: 1.8;
}
.about-bio strong { color: var(--text); font-weight: 600; }
.about-bio em { color: var(--accent); font-style: normal; }

.about-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}
.highlight-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 99px;
  font-size: 0.85rem;
  font-weight: 500;
  transition: border-color var(--transition), transform var(--transition);
}
.highlight-pill:hover { border-color: var(--accent); transform: translateY(-2px); }
.highlight-pill i { color: var(--accent); }

/* Card stack */
.about-card-stack {
  position: relative;
  height: 380px;
}
.about-card {
  position: absolute;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  backdrop-filter: blur(8px);
  transition: transform var(--transition);
}
.about-card:hover { transform: translateY(-4px); }

.card-main {
  display: flex;
  align-items: center;
  gap: 20px;
  width: 100%;
  top: 0; left: 0;
  background: linear-gradient(135deg, rgba(93,123,250,0.12), rgba(167,139,250,0.08));
  border-color: rgba(93,123,250,0.25);
}
.card-avatar {
  position: relative;
  flex-shrink: 0;
}
.avatar-ring {
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  padding: 2px;
}
.avatar-inner {
  position: relative;
  width: 64px; height: 64px;
  border-radius: 50%;
  background: var(--bg);
  display: grid;
  place-items: center;
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--accent);
  z-index: 1;
}
.card-name { font-family: 'Syne', sans-serif; font-weight: 700; font-size: 1rem; }
.card-role { color: var(--text-muted); font-size: 0.85rem; margin-top: 2px; }
.card-loc { color: var(--text-dim); font-size: 0.8rem; margin-top: 6px; display: flex; align-items: center; gap: 6px; }
.card-loc i { color: var(--ml-color); }

.card-stat {
  width: 180px;
  top: 140px;
  right: -20px;
  text-align: center;
}
.card-stat-icon { font-size: 1.5rem; color: var(--accent-3); margin-bottom: 8px; }
.card-stat-value {
  font-family: 'Syne', sans-serif;
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent);
}
.card-stat-value span { font-size: 1rem; color: var(--text-muted); }
.card-stat-label { color: var(--text-muted); font-size: 0.78rem; margin-top: 4px; }

.card-icpc {
  width: 200px;
  bottom: 0;
  left: -20px;
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.82rem;
  color: var(--text-muted);
}
.card-icpc strong { color: var(--text); }
.card-trophy { font-size: 1.5rem; color: var(--aws-color); flex-shrink: 0; }

/* ── 9. Skills ───────────────────────────────────────────── */
#skills { background: var(--bg); }

.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.skill-category {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color var(--transition), transform var(--transition);
}
.skill-category:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
}

.skill-cat-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}
.skill-cat-header i {
  font-size: 1.1rem;
  color: var(--accent);
  width: 36px; height: 36px;
  border-radius: 8px;
  background: var(--surface-hover);
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
}
.skill-cat-header h3 {
  font-family: 'Syne', sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
}

.skill-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.skill-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-muted);
  font-family: 'DM Mono', monospace;
  transition: all var(--transition);
}
.skill-pill:hover {
  border-color: var(--accent);
  color: var(--text);
  transform: translateY(-2px);
}
.skill-pill i { color: var(--accent); font-size: 0.85rem; }

/* ── 10. Projects ────────────────────────────────────────── */
#projects { background: var(--bg-2); }

.projects-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}
.project-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  opacity: 0;
  transition: opacity var(--transition);
}
.project-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-6px);
  box-shadow: 0 24px 48px rgba(0,0,0,0.2);
}
.project-card:hover::before { opacity: 1; }

.project-card.featured {
  grid-column: 1 / -1;
  flex-direction: row;
  gap: 40px;
  align-items: flex-start;
}

.project-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4px;
}
.project-card.featured .project-card-top {
  flex-direction: column;
  align-items: flex-start;
  flex-shrink: 0;
  width: 200px;
}

.project-icon-wrap {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-size: 1.4rem;
  margin-bottom: 8px;
}
.project-icon-wrap.devops { background: rgba(93,123,250,0.15); color: var(--devops-color); }
.project-icon-wrap.ml    { background: rgba(244,114,182,0.15); color: var(--ml-color); }
.project-icon-wrap.snow  { background: rgba(52,211,153,0.15);  color: var(--snow-color); }

.project-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: flex-end;
}
.project-card.featured .project-meta { align-items: flex-start; }

.project-date {
  font-family: 'DM Mono', monospace;
  font-size: 0.72rem;
  color: var(--text-dim);
}
.project-tag {
  padding: 4px 10px;
  background: rgba(93,123,250,0.15);
  color: var(--accent);
  border-radius: 99px;
  font-size: 0.7rem;
  font-family: 'DM Mono', monospace;
}

.project-content { flex: 1; }
.project-card.featured .project-content {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.project-title {
  font-family: 'Syne', sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.3;
}

.project-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.8;
}

.project-outcomes {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.project-outcomes li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.project-outcomes li i { color: var(--accent-3); margin-top: 3px; flex-shrink: 0; }

.project-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.project-stack span {
  padding: 4px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.75rem;
  font-family: 'DM Mono', monospace;
  color: var(--text-muted);
}

/* ── 11. Education ───────────────────────────────────────── */
#education { background: var(--bg); }

.timeline {
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: relative;
  padding-left: 28px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 7px; top: 0; bottom: 0;
  width: 1.5px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}

.timeline-item { position: relative; }
.timeline-dot {
  position: absolute;
  left: -28px;
  top: 24px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
  border: 2.5px solid var(--bg);
}

.timeline-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  transition: border-color var(--transition), transform var(--transition);
}
.timeline-card:hover { border-color: var(--border-hover); transform: translateX(6px); }

.timeline-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}
.timeline-icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  background: rgba(93,123,250,0.12);
  border: 1px solid rgba(93,123,250,0.2);
  display: grid;
  place-items: center;
  color: var(--accent);
  flex-shrink: 0;
}
.timeline-header h3 { font-family: 'Syne', sans-serif; font-weight: 700; font-size: 1rem; }
.timeline-inst { color: var(--text-muted); font-size: 0.85rem; margin-top: 4px; }

.timeline-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.timeline-date {
  font-family: 'DM Mono', monospace;
  font-size: 0.78rem;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 6px;
}
.timeline-grade {
  padding: 4px 14px;
  border-radius: 99px;
  background: var(--surface);
  border: 1px solid var(--border);
  font-family: 'DM Mono', monospace;
  font-size: 0.8rem;
  font-weight: 500;
}
.timeline-grade.grade-top {
  background: rgba(52,211,153,0.12);
  border-color: rgba(52,211,153,0.3);
  color: var(--accent-3);
}

/* ── 12. Certifications ──────────────────────────────────── */
#certifications { background: var(--bg-2); }

.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.cert-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px 24px;
  display: flex;
  align-items: center;
  gap: 18px;
  transition: border-color var(--transition), transform var(--transition);
}
.cert-card:hover { border-color: var(--border-hover); transform: translateY(-4px); }

.cert-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}
.cert-icon.ibm       { background: rgba(15,98,254,0.15);  color: var(--ibm-color); }
.cert-icon.aws       { background: rgba(255,153,0,0.15);  color: var(--aws-color); }
.cert-icon.google    { background: rgba(52,168,83,0.15);  color: var(--google-color); }
.cert-icon.microsoft { background: rgba(0,164,239,0.15);  color: var(--ms-color); }
.cert-icon.snow      { background: rgba(52,211,153,0.12); color: var(--snow-color); }

.cert-info { flex: 1; }
.cert-info h3 { font-family: 'Syne', sans-serif; font-size: 0.9rem; font-weight: 700; line-height: 1.3; }
.cert-issuer { color: var(--text-muted); font-size: 0.8rem; margin-top: 4px; }
.cert-id { color: var(--text-dim); font-size: 0.72rem; font-family: 'DM Mono', monospace; margin-top: 4px; }

.cert-link {
  color: var(--text-dim);
  font-size: 0.85rem;
  transition: color var(--transition);
  flex-shrink: 0;
}
.cert-link:hover { color: var(--accent); }

/* ── 13. Achievements ────────────────────────────────────── */
#achievements { background: var(--bg); }

.achievements-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.achievement-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  text-align: center;
  transition: border-color var(--transition), transform var(--transition);
}
.achievement-card:hover { border-color: var(--accent); transform: translateY(-6px); }

.ach-icon {
  width: 60px; height: 60px;
  border-radius: 16px;
  background: rgba(93,123,250,0.12);
  border: 1px solid rgba(93,123,250,0.2);
  display: grid;
  place-items: center;
  font-size: 1.4rem;
  color: var(--accent);
  margin: 0 auto 20px;
}

.achievement-card h3 {
  font-family: 'Syne', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.achievement-card p { color: var(--text-muted); font-size: 0.88rem; }

/* ── 14. Contact ─────────────────────────────────────────── */
#contact { background: var(--bg-2); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.contact-intro {
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 32px;
}
.contact-intro strong { color: var(--text); }

.contact-links { display: flex; flex-direction: column; gap: 14px; }
.contact-link-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--transition), transform var(--transition);
}
.contact-link-item:hover { border-color: var(--border-hover); transform: translateX(6px); }

.contact-link-icon {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: rgba(93,123,250,0.12);
  display: grid;
  place-items: center;
  color: var(--accent);
  flex-shrink: 0;
  font-size: 0.9rem;
}
.contact-link-icon.linkedin { background: rgba(10,102,194,0.15); color: #0a66c2; }
.contact-link-icon.github   { background: rgba(255,255,255,0.06); color: var(--text); }
.contact-link-icon.phone    { background: rgba(52,211,153,0.12);  color: var(--accent-3); }

.cl-label {
  display: block;
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.cl-val { display: block; font-size: 0.9rem; font-weight: 500; margin-top: 2px; }

/* Form */
.contact-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 36px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group label {
  font-family: 'DM Mono', monospace;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}
.form-group input,
.form-group textarea {
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.95rem;
  color: var(--text);
  outline: none;
  resize: vertical;
  transition: border-color var(--transition);
}
.form-group input:focus,
.form-group textarea:focus { border-color: var(--accent); }
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-dim); }

.form-note {
  font-size: 0.85rem;
  color: var(--accent-3);
  text-align: center;
  min-height: 1.2em;
}

/* ── 15. Footer ──────────────────────────────────────────── */
footer {
  background: var(--bg-3);
  border-top: 1px solid var(--border);
  padding: 40px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.footer-logo {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
}
.footer-copy {
  color: var(--text-muted);
  font-size: 0.85rem;
}
.footer-socials {
  display: flex;
  gap: 14px;
}
.footer-socials a {
  width: 36px; height: 36px;
  border-radius: 8px;
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: all var(--transition);
}
.footer-socials a:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

/* ── 16. Scroll Reveal Animation ────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.reveal:nth-child(1) { transition-delay: 0.05s; }
.reveal:nth-child(2) { transition-delay: 0.12s; }
.reveal:nth-child(3) { transition-delay: 0.19s; }
.reveal:nth-child(4) { transition-delay: 0.26s; }
.reveal:nth-child(5) { transition-delay: 0.33s; }
.reveal:nth-child(6) { transition-delay: 0.40s; }

/* ── 17. Responsive ──────────────────────────────────────── */
@media (max-width: 1024px) {
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid  { grid-template-columns: 1fr; gap: 48px; }
  .about-card-stack { height: 320px; }
}

@media (max-width: 768px) {
  section { padding: 72px 0; }

  .nav-links { display: none; }
  .btn-resume { display: none; }
  .hamburger { display: flex; }

  .hero-stats { gap: 16px; padding: 16px 20px; }
  .stat-divider { height: 28px; }

  .about-grid { grid-template-columns: 1fr; }
  .about-right { display: none; }

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

  .projects-grid { grid-template-columns: 1fr; }
  .project-card.featured { flex-direction: column; }
  .project-card.featured .project-card-top { width: 100%; flex-direction: row; justify-content: space-between; }

  .timeline { padding-left: 20px; }

  .achievements-row { grid-template-columns: 1fr; }

  .contact-grid { grid-template-columns: 1fr; gap: 40px; }

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

@media (max-width: 480px) {
  .hero-cta { flex-direction: column; align-items: center; }
  .hero-stats { gap: 12px; }
  .stat-divider { display: none; }
  .certs-grid { grid-template-columns: 1fr; }
}