/* =========================================
   MALKIT PORTFOLIO — style.css
   Dark/Light theme · Responsive · Accessible
   ========================================= */

/* ─── 1. CSS CUSTOM PROPERTIES ─────────── */
:root {
  /* Dark theme (default) */
  --bg:          #050c1a;
  --bg-alt:      #0a1628;
  --bg-card:     #0d1f3a;
  --text:        #e2e8f0;
  --text-muted:  #7ea0be;
  --border:      rgba(56,189,248,0.14);
  --shadow:      rgba(0,0,0,0.4);

  /* Accent palette */
  --a1:          #38bdf8;
  --a2:          #818cf8;
  --a3:          #c084fc;
  --glow1:       rgba(56,189,248,0.22);
  --glow2:       rgba(129,140,248,0.18);

  /* Typography */
  --font-display: 'Syne', system-ui, sans-serif;
  --font-body:    'DM Sans', system-ui, sans-serif;

  /* Spacing */
  --section-pad: 112px;
  --radius-card: 16px;
  --radius-sm:   8px;

  /* Transitions */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ─── LIGHT THEME OVERRIDES ─────────────── */
body.light-mode {
  --bg:         #f0f6ff;
  --bg-alt:     #e4eef9;
  --bg-card:    #ffffff;
  --text:       #0f1e33;
  --text-muted: #4a6481;
  --border:     rgba(56,189,248,0.3);
  --shadow:     rgba(56,189,248,0.12);
  --glow1:      rgba(56,189,248,0.18);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.65;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  cursor: none;
  transition: background 0.35s var(--ease), color 0.35s var(--ease);
}

body.light-mode { cursor: auto; }

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

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  line-height: 1.1;
}

/* ─── 3. SCROLLBAR ───────────────────────── */
::-webkit-scrollbar { width: 3px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--a1); border-radius: 2px; }

/* ─── 4. UTILITY ─────────────────────────── */
.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 40px;
}

.section-label {
  display: block;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 3.5px;
  text-transform: uppercase;
  color: var(--a1);
  margin-bottom: 10px;
}

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

.section-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  color: var(--text);
}

.section-title span { color: var(--a1); }

.section-line {
  width: 38px; height: 3px;
  background: linear-gradient(90deg, var(--a1), var(--a2));
  margin: 14px auto 0;
  border-radius: 2px;
}

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s var(--ease), transform 0.65s var(--ease);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.hidden { display: none !important; }

/* ─── 5. BUTTONS ─────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 26px;
  background: linear-gradient(135deg, var(--a1), var(--a2));
  color: #050c1a;
  font-family: var(--font-display);
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: 0.3px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.btn-primary::after {
  content: '';
  position: absolute; inset: 0;
  background: rgba(255,255,255,0.12);
  transform: translateX(-100%);
  transition: transform 0.4s var(--ease);
}
.btn-primary:hover::after { transform: translateX(0); }
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px var(--glow1);
}
.btn-primary.btn-full { width: 100%; justify-content: center; }

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 26px;
  border: 1.5px solid var(--border);
  color: var(--text);
  font-family: var(--font-display);
  font-size: 13.5px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease), transform 0.25s var(--ease);
}
.btn-outline:hover {
  border-color: var(--a1);
  color: var(--a1);
  transform: translateY(-2px);
}

/* Small project buttons */
.btn-sm {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 7px 14px;
  border-radius: 6px;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.3px;
  text-decoration: none;
  transition: all 0.25s var(--ease);
  cursor: pointer;
}
.btn-sm svg { flex-shrink: 0; }

.btn-accent {
  background: rgba(56,189,248,0.12);
  color: var(--a1);
  border: 1px solid rgba(56,189,248,0.25);
}
.btn-accent:hover {
  background: rgba(56,189,248,0.22);
  border-color: var(--a1);
  transform: translateY(-1px);
}

.btn-accent2 {
  background: rgba(129,140,248,0.12);
  color: var(--a2);
  border: 1px solid rgba(129,140,248,0.25);
}
.btn-accent2:hover {
  background: rgba(129,140,248,0.22);
  border-color: var(--a2);
  transform: translateY(-1px);
}

.btn-accent3 {
  background: rgba(192,132,252,0.12);
  color: var(--a3);
  border: 1px solid rgba(192,132,252,0.25);
}
.btn-accent3:hover {
  background: rgba(192,132,252,0.22);
  border-color: var(--a3);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  color: var(--text);
  border-color: rgba(255,255,255,0.3);
  transform: translateY(-1px);
}

.btn-disabled,
.btn-disabled:hover {
  opacity: 0.55;
  cursor: not-allowed;
  pointer-events: none;
  transform: none;
}

/* ─── 6. CURSOR (desktop only) ─────────── */
.cursor, .cursor-ring { pointer-events: none; position: fixed; z-index: 9999; }

.cursor {
  width: 10px; height: 10px;
  background: var(--a1);
  border-radius: 50%;
  top: 0; left: 0;
  transform: translate(-50%,-50%);
  transition: width 0.2s, height 0.2s, background 0.2s;
  mix-blend-mode: screen;
}
.cursor-ring {
  width: 34px; height: 34px;
  border: 1.5px solid var(--a1);
  border-radius: 50%;
  top: 0; left: 0;
  z-index: 9998;
  transform: translate(-50%,-50%);
  opacity: 0.5;
  transition: width 0.3s, height 0.3s, border-color 0.2s;
}
body.cursor-hover .cursor        { width: 18px; height: 18px; background: var(--a2); }
body.cursor-hover .cursor-ring   { width: 52px; height: 52px; border-color: var(--a2); opacity: 0.35; }
body.light-mode .cursor, body.light-mode .cursor-ring { display: none; }

/* ─── 7. NAVBAR ──────────────────────────── */
.navbar {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 52px;
  transition: padding 0.4s var(--ease), background 0.4s, border-color 0.4s;
}
.navbar.scrolled {
  background: rgba(5,12,26,0.88);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border);
  padding: 13px 52px;
}
body.light-mode .navbar.scrolled {
  background: rgba(240,246,255,0.9);
}

.logo {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 4px;
  background: linear-gradient(90deg, var(--a1), var(--a2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 34px;
}
.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: 0.4px;
  position: relative;
  transition: color 0.25s;
}
.nav-links a::after {
  content: '';
  position: absolute; bottom: -4px; left: 0;
  width: 0; height: 1.5px;
  background: var(--a1);
  transition: width 0.25s var(--ease);
}
.nav-links a:hover        { color: var(--a1); }
.nav-links a:hover::after { width: 100%; }
.nav-links a.active       { color: var(--a1); }
.nav-links a.active::after{ width: 100%; }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.theme-toggle {
  position: relative;
  width: 58px;
  height: 30px;
  padding: 2px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #10213c;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  transition: border-color 0.25s, background 0.25s, box-shadow 0.25s;
}
.theme-toggle:hover {
  border-color: var(--a1);
  box-shadow: 0 0 0 3px rgba(56,189,248,0.13);
}
.theme-icon {
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: #071426;
  font-size: 14px;
  line-height: 1;
  box-shadow: 0 2px 6px rgba(0,0,0,0.28);
  transition: transform 0.28s var(--ease), background 0.28s var(--ease);
}
body.light-mode .theme-toggle {
  background: #bdefff;
  border-color: rgba(56,189,248,0.48);
}
body.light-mode .theme-icon {
  transform: translateX(28px);
  background: #ffffff;
}

.btn-hire {
  font-family: var(--font-display);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--a1);
  border: 1.5px solid var(--a1);
  padding: 8px 20px;
  border-radius: 4px;
  text-decoration: none;
  transition: background 0.25s, color 0.25s;
}
.btn-hire:hover {
  background: var(--a1);
  color: #050c1a;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s;
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* ─── 8. MOBILE MENU ─────────────────────── */
.menu-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1001;
  opacity: 0;
  transition: opacity 0.35s;
}
.menu-overlay.open { opacity: 1; }

.mobile-menu {
  position: fixed;
  top: 0; right: -100%; bottom: 0;
  width: min(300px, 80vw);
  background: var(--bg-alt);
  border-left: 1px solid var(--border);
  z-index: 1002;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 32px;
  transition: right 0.4s cubic-bezier(0.4,0,0.2,1);
  padding: 40px 24px;
}
.mobile-menu.open { right: 0; }

.mobile-close {
  position: absolute; top: 20px; right: 20px;
  background: none; border: none;
  color: var(--text-muted); font-size: 20px;
  cursor: pointer;
  line-height: 1;
  padding: 6px;
  transition: color 0.2s;
}
.mobile-close:hover { color: var(--text); }

.mobile-menu nav {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
}
.mobile-menu a {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--text);
  text-decoration: none;
  transition: color 0.25s;
}
.mobile-menu a:hover,
.mobile-menu a.active {
  color: var(--a1);
  text-decoration: underline;
  text-underline-offset: 8px;
  text-decoration-thickness: 2px;
}

/* ─── 9. HERO ────────────────────────────── */
.hero {
  min-height: 100vh;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 80px;
}

/* Background grid */
.hero-grid {
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(56,189,248,0.032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56,189,248,0.032) 1px, transparent 1px);
  background-size: 56px 56px;
}

/* Gradient orbs */
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
  animation: floatOrb 9s ease-in-out infinite;
}
.orb-1 {
  width: 520px; height: 520px;
  background: radial-gradient(circle, rgba(56,189,248,0.11), transparent 70%);
  top: -120px; right: -80px;
  animation-delay: 0s;
}
.orb-2 {
  width: 420px; height: 420px;
  background: radial-gradient(circle, rgba(129,140,248,0.09), transparent 70%);
  bottom: -60px; left: 80px;
  animation-delay: -4.5s;
}

@keyframes floatOrb {
  0%,100% { transform: translate(0,0) scale(1); }
  33%      { transform: translate(24px,-24px) scale(1.04); }
  66%      { transform: translate(-16px,20px) scale(0.96); }
}

/* Hero inner layout */
.hero-inner {
  display: flex;
  align-items: center;
 justify-content: flex-start;
  gap: 48px;
  position: relative; z-index: 1;
  flex-wrap: wrap;
  margin-left: 100px;

}

.hero-text { flex: 1 1 420px; max-width: 680px; }

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border);
  background: rgba(56,189,248,0.07);
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 10.5px;
  letter-spacing: 2px;
  font-weight: 600;
  color: var(--a1);
  margin-bottom: 24px;
  animation: fadeUp 0.7s ease both;
}
.hero-tag .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--a1);
  animation: pulseDot 2s ease infinite;
}

@keyframes pulseDot {
  0%,100% { opacity:1; transform:scale(1); }
  50%      { opacity:0.4; transform:scale(0.7); }
}

.hero-text h1 {
  font-size: clamp(38px, 5.5vw, 76px);
  font-weight: 800;
  line-height: 1.04;
  animation: fadeUp 0.7s 0.1s ease both;


}
.hero-name {
  display: block;
  background: linear-gradient(135deg, var(--a1) 0%, var(--a2) 55%, var(--a3) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  
}

.hero-sub {
  font-size: clamp(14px, 1.8vw, 16.5px);
  color: var(--text-muted);
  margin: 18px 0 34px;
  line-height: 1.75;
  animation: fadeUp 0.7s 0.2s ease both;
}

.hero-btns {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  animation: fadeUp 0.7s 0.3s ease both;
}

/* Hero photo */
.hero-photo {
  position: relative;
  flex-shrink: 0;
  animation: fadeUp 0.7s 0.25s ease both;
  
}

.photo-ring {
  position: absolute;
  inset: -10px;
  border-radius: 50%;
  border: 2px solid var(--border);
  animation: rotateSlow 18s linear infinite;
}
.photo-ring::before {
  content: '';
  position: absolute;
  top: -1px; left: 50%;
  width: 12px; height: 12px;
  background: var(--a1);
  border-radius: 50%;
  transform: translateX(-50%);
  box-shadow: 0 0 10px var(--glow1);
}

@keyframes rotateSlow {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

.profile-img {
  width: 200px; height: 200px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--border);
  box-shadow: 0 0 40px var(--glow1);
  transition: box-shadow 0.4s;
}
.hero-photo:hover .profile-img {
  box-shadow: 0 0 60px var(--glow1), 0 0 100px var(--glow2);
}

.photo-badge {
  position: absolute;
  bottom: 4px; right: -16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 8px 12px;
  border-radius: 10px;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  box-shadow: 0 8px 24px var(--shadow);
}
.badge-emoji { font-size: 16px; }

/* Stats bar */
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  position: relative; z-index: 1;
  margin-top: 64px;
  padding-bottom: 64px;
  animation: fadeUp 0.7s 0.4s ease both;
}
.stat {
  background: rgba(10,22,40,0.6);
  border: 1px solid var(--border);
  backdrop-filter: blur(10px);
  padding: 18px 28px;
  border-radius: 12px;
  text-align: center;
  min-width: 110px;
  transition: border-color 0.25s, box-shadow 0.25s;
}
body.light-mode .stat { background: rgba(255,255,255,0.7); }
body.light-mode .skill-category {
  color: #173b63;
  border-color: rgba(56,189,248,0.28);
  box-shadow: 0 16px 34px rgba(56,112,160,0.13);
}
body.light-mode .skill-category {
  background:
    radial-gradient(circle at 80% 12%, rgba(34,197,94,0.16), transparent 34%),
    linear-gradient(135deg, #dff7ff 0%, #e7f1ff 54%, #eef8ed 100%);
}
body.light-mode .skill-category:nth-child(3n+2) {
  background:
    radial-gradient(circle at 78% 18%, rgba(129,140,248,0.18), transparent 34%),
    linear-gradient(135deg, #ecebff 0%, #e6f6ff 58%, #f2f7ff 100%);
}
body.light-mode .skill-category:nth-child(3n+3) {
  background:
    radial-gradient(circle at 80% 14%, rgba(14,165,233,0.16), transparent 34%),
    linear-gradient(135deg, #e4fbf7 0%, #e7f4ff 56%, #f3f0ff 100%);
}
body.light-mode .skill-category h3,
body.light-mode .skill-item h4 {
  color: #1f5f8f;
}
body.light-mode .skill-icon {
  background: linear-gradient(135deg, rgba(56,189,248,0.2), rgba(34,197,94,0.18), rgba(129,140,248,0.18));
  border-color: rgba(31,95,143,0.24);
  color: #1f5f8f;
}
body.light-mode .form-group input,
body.light-mode .form-group textarea {
  background: #eef7ff;
  border-color: rgba(56,112,160,0.24);
  color: #173b63;
}
body.light-mode .cert-img-wrap {
  background: #e6f3ff;
}
body.light-mode .project-body p {
  color: #496f91;
}
.stat:hover {
  border-color: rgba(56,189,248,0.4);
  box-shadow: 0 8px 24px var(--glow1);
}
.stat-num {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--a1), var(--a2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label {
  font-size: 9.5px;
  letter-spacing: 2px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 28px; left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  font-size: 9px;
  letter-spacing: 2.5px;
  animation: fadeUp 0.7s 0.6s ease both;
  margin-left: -20px;
}
.scroll-line {
  width: 1px; height: 42px;
  background: linear-gradient(var(--a1), transparent);
  animation: scrollDrop 2.2s ease infinite;
}
@keyframes scrollDrop {
  0%   { transform: scaleY(0); transform-origin: top; }
  50%  { transform: scaleY(1); transform-origin: top; }
  51%  { transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* Hero entry animations */
@keyframes fadeUp {
  from { opacity:0; transform:translateY(22px); }
  to   { opacity:1; transform:translateY(0);    }
}

/* ─── 10. ABOUT ──────────────────────────── */
.about-section {
  padding: var(--section-pad) 0;
  background: var(--bg);
}

.about-grid {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 72px;
  align-items: center;
}

.about-img-wrap {
  position: relative;
}
.about-img-wrap img {
  width: 100%;
  border-radius: 18px;
  border: 2px solid var(--border);
  object-fit: cover;
  aspect-ratio: 4/5;
  filter: grayscale(15%);
  transition: filter 0.4s, box-shadow 0.4s;
}
.about-img-wrap:hover img {
  filter: grayscale(0%);
  box-shadow: 0 20px 50px var(--glow1);
}
.about-deco {
  position: absolute;
  top: 22px; left: 22px;
  right: -22px; bottom: -22px;
  border: 1.5px solid var(--border);
  border-radius: 22px;
  z-index: -1;
  transition: border-color 0.3s;
}
.about-img-wrap:hover .about-deco { border-color: rgba(56,189,248,0.3); }

.about-text p {
  color: var(--text-muted);
  margin-bottom: 14px;
  font-size: 15px;
}
.about-text strong { color: var(--text); }

.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin: 22px 0 28px;
}
.tag {
  font-size: 12px;
  letter-spacing: 0.3px;
  border: 1px solid var(--border);
  padding: 5px 14px;
  border-radius: 100px;
  color: var(--a1);
  cursor: default;
  transition: background 0.25s, border-color 0.25s;
}
.tag:hover {
  background: rgba(56,189,248,0.1);
  border-color: rgba(56,189,248,0.35);
}

.about-info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 11px;
  margin-bottom: 28px;
}
.info-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 13px 16px;
  border-radius: var(--radius-sm);
}
.info-label {
  font-size: 9.5px;
  letter-spacing: 1.8px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 3px;
}
.info-val {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text);
}

/* ─── 11. SKILLS ─────────────────────────── */
.skills-section {
  padding: var(--section-pad) 0;
  background: var(--bg-alt);
  border-top:    1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.skills-section .container {
  max-width: min(100%, 1860px);
  padding-left: clamp(36px, 4vw, 72px);
  padding-right: clamp(36px, 4vw, 72px);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(14px, 1.4vw, 26px);
}

.skill-category {
  background: rgba(7, 15, 30, 0.64);
  border: 1px solid var(--border);
  padding: clamp(28px, 2vw, 40px) clamp(20px, 1.8vw, 34px);
  border-radius: 14px;
  cursor: default;
  position: relative;
  overflow: hidden;
  transition: transform 0.28s var(--ease),
              border-color 0.28s,
              box-shadow 0.28s;
}
.skill-category::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(56,189,248,0.08), transparent 48%);
  opacity: 0;
  transition: opacity 0.28s;
}
.skill-category:hover {
  border-color: rgba(56,189,248,0.45);
  transform: translateY(-7px);
  box-shadow: 0 18px 36px rgba(56,189,248,0.13);
}
.skill-category:hover::before { opacity: 1; }
.skill-category h3 {
  color: var(--primary);
  font-family: var(--font-mono);
  font-size: clamp(15px, 1vw, 19px);
  font-weight: 800;
  letter-spacing: 1.2px;
  margin-bottom: 26px;
  position: relative;
  text-transform: uppercase;
  z-index: 1;
}
.skill-list {
  display: grid;
  gap: 17px;
  position: relative;
  z-index: 1;
}
.skill-item {
  align-items: center;
  display: grid;
  gap: 13px;
  grid-template-columns: 38px minmax(0, 1fr);
}
.skill-item img {
  width: 36px; height: 36px;
  object-fit: contain;
  transition: transform 0.28s var(--ease);
}
.skill-icon {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(56,189,248,0.22), rgba(34,197,94,0.18));
  border: 1px solid rgba(56,189,248,0.35);
  color: var(--text);
  font-size: 11px;
  font-weight: 800;
  position: relative;
  z-index: 1;
  transition: transform 0.28s var(--ease);
}
.skill-category:hover img,
.skill-category:hover .skill-icon { transform: scale(1.1) rotate(4deg); }
.skill-item h4 {
  font-size: clamp(13px, 0.86vw, 15.5px);
  font-weight: 800;
  color: var(--text);
  line-height: 1.25;
  margin-bottom: 4px;
}
.skill-item p {
  color: var(--text-muted);
  font-size: clamp(11.5px, 0.78vw, 13.5px);
  line-height: 1.45;
}

/* ─── 12. PROJECTS ───────────────────────── */
.projects-section {
  padding: var(--section-pad) 0;
  background: var(--bg);
}
.projects-section--alt {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding-top: 80px;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  position: relative;
  transition: transform 0.35s var(--ease),
              border-color 0.35s,
              box-shadow 0.35s;
}
/* Top accent line */
.project-card::after {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 2.5px;
  background: linear-gradient(90deg, var(--a1), var(--a2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease);
}
.project-card:hover::after      { transform: scaleX(1); }
.project-card:hover {
  transform: translateY(-9px);
  border-color: rgba(56,189,248,0.35);
  box-shadow: 0 22px 45px rgba(56,189,248,0.14);
}

.project-img-wrap {
  position: relative;
  height: 196px;
  overflow: hidden;
}
.project-img-wrap img,
.project-img-wrap video {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.55s var(--ease);
}
.project-video { display: block; background: #030812; }
.project-card:hover .project-img-wrap img,
.project-card:hover .project-img-wrap video { transform: scale(1.07); }
.project-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(5,12,26,0.88) 0%, transparent 65%);
}
body.light-mode .project-overlay {
  background: linear-gradient(to top, rgba(240,246,255,0.6) 0%, transparent 65%);
}

.project-badge {
  position: absolute; top: 12px; left: 12px;
  font-size: 9.5px; letter-spacing: 1.5px; font-weight: 700;
  padding: 4px 10px; border-radius: 100px;
}
.project-badge.ml { background: var(--a1); color: #050c1a; }
.project-badge.dl { background: var(--a2); color: #fff; }
.project-badge.bi { background: var(--a3); color: #fff; }

.project-body { padding: 20px; }
.project-body h3 {
  font-size: 16.5px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 9px;
}
.project-body p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}
.project-links {
  display: flex;
  gap: 9px;
  flex-wrap: wrap;
}

/* ─── 13. CERTIFICATES ───────────────────── */
.cert-section {
  padding: var(--section-pad) 0;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.cert-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.3s var(--ease), border-color 0.3s, box-shadow 0.3s;
}
.cert-card:hover {
  transform: translateY(-7px);
  border-color: rgba(56,189,248,0.38);
  box-shadow: 0 18px 38px rgba(56,189,248,0.12);
}

.cert-img-wrap {
  height: 172px;
  overflow: hidden;
  background: var(--bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--border);
  position: relative;
}
.cert-img-wrap img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease);
}
.cert-card:hover .cert-img-wrap img { transform: scale(1.05); }
.cert-logo {
  position: absolute;
  font-size: 42px;
  opacity: 0.25;
}
.cert-img-wrap img + .cert-logo { display: none; }

.cert-body { padding: 18px; }
.cert-issuer {
  font-size: 10px;
  letter-spacing: 1.5px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--a1);
  display: block;
  margin-bottom: 6px;
}
.cert-body h3 {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.cert-body p {
  font-size: 12.5px;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 12px;
}
.cert-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.cert-date {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  color: var(--text-muted);
}
.cert-link {
  font-family: var(--font-display);
  font-size: 11.5px;
  font-weight: 700;
  color: var(--a1);
  text-decoration: none;
  transition: opacity 0.2s;
}
.cert-link:hover { opacity: 0.7; }
.cert-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

/* ─── 14. CONTACT ────────────────────────── */
.contact-section {
  padding: var(--section-pad) 0;
  background: var(--bg);
  border-top: 1px solid var(--border);
}

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

.contact-info h2 {
  font-size: clamp(28px, 3.5vw, 42px);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 16px;
  margin-top: 10px;
}
.contact-info h2 span { color: var(--a1); }
.contact-info > p {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 36px;
}

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

.channel-item {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 16px 18px;
  border-radius: 12px;
  text-decoration: none;
  transition: border-color 0.25s, box-shadow 0.25s, transform 0.25s;
}
.channel-item:hover {
  border-color: rgba(56,189,248,0.4);
  box-shadow: 0 8px 22px var(--glow1);
  transform: translateX(4px);
}
.channel-icon {
  font-size: 22px;
  line-height: 1;
  flex-shrink: 0;
}
.channel-label {
  font-size: 10px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 2px;
}
.channel-val {
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text);
}

/* Contact form */
.contact-form-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 32px;
}

.contact-form { display: flex; flex-direction: column; gap: 20px; }

.form-group { display: flex; flex-direction: column; gap: 7px; }
.form-group label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  text-transform: uppercase;
}

.form-group input,
.form-group textarea {
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 11px 14px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14px;
  outline: none;
  transition: border-color 0.25s, box-shadow 0.25s;
  resize: vertical;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); opacity: 0.6; }
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--a1);
  box-shadow: 0 0 0 3px rgba(56,189,248,0.12);
}
.form-group input.error,
.form-group textarea.error {
  border-color: #f87171;
  box-shadow: 0 0 0 3px rgba(248,113,113,0.12);
}

.form-error {
  font-size: 12px;
  color: #f87171;
  min-height: 16px;
}

.form-success {
  background: rgba(56,189,248,0.1);
  border: 1px solid rgba(56,189,248,0.3);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 13.5px;
  color: var(--a1);
  text-align: center;
}

/* ─── 15. FOOTER ─────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  background: var(--bg);
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer p {
  font-size: 13px;
  color: var(--text-muted);
}
.footer p span { color: var(--a1); }
.footer-links {
  display: flex;
  gap: 22px;
}
.footer-links a {
  font-size: 13px;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--a1); }

/* ─── 16. RESPONSIVE ─────────────────────── */

/* === Tablet: ≤ 992px === */
@media (max-width: 992px) {
  :root { --section-pad: 80px; }

  .container { padding: 0 28px; }

  /* Navbar */
  .navbar, .navbar.scrolled { padding-left: 28px; padding-right: 28px; }
  .nav-links, .btn-hire { display: none; }
  .hamburger { display: flex; }

  /* Hero */
  .hero-inner { flex-direction: column-reverse; align-items: center; text-align: center; margin-left: 60px}
  .hero-text   { max-width: 100%; }
  .hero-btns   { justify-content: center; }
  .hero-tag    { margin-left: auto; margin-right: auto; display: inline-flex; }
  .hero-stats  { gap: 14px; }

  /* Profile photo in hero */
  .profile-img { width: 160px; height: 160px; }
  .photo-badge { right: -8px; }

  /* About */
  .about-grid  { grid-template-columns: 1fr; gap: 36px; }
  .about-img-wrap img { max-width: 320px; margin: 0 auto; }
  .about-deco  { display: none; }
  .about-text  { text-align: center; }
  .about-tags  { justify-content: center; }
  .about-info-grid { max-width: 460px; margin-left: auto; margin-right: auto; }
  .about-text .btn-primary { display: inline-flex; }

  /* Grids */
  .skills-grid   { grid-template-columns: repeat(3, 1fr); }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .cert-grid     { grid-template-columns: repeat(2, 1fr); }

  /* Contact */
  .contact-grid { grid-template-columns: 1fr; gap: 48px; }
}

/* === Mobile: ≤ 576px === */
@media (max-width: 576px) {
  :root { --section-pad: 64px; }

  .container { padding: 0 18px; }

  /* Navbar */
  .navbar, .navbar.scrolled { padding-left: 18px; padding-right: 18px; }

  /* Hero */
    .hero-inner {  margin-left: 0px;}

  .profile-img { width: 130px; height: 130px; }
  .photo-ring  { inset: -8px; }
  .hero-stats  { gap: 10px; }
  .stat        { min-width: 80px; padding: 13px 14px; }
  .stat-num    { font-size: 24px; }
  .hero-btns   { flex-direction: column; gap: 10px; }
  .hero-btns .btn-primary,
  .hero-btns .btn-outline { width: 100%; justify-content: center; }

  /* Grids */
  .skills-grid   { grid-template-columns: 1fr; gap: 16px; }
  .skills-section .container,
  .projects-section .container,
  .cert-section .container,
  .experience-section .container,
  .contact-section .container { padding-left: 18px; padding-right: 18px; }
  .skill-category { padding: 30px 22px; }
  .skill-category h3 { font-size: 16px; margin-bottom: 26px; }
  .skill-item { gap: 14px; grid-template-columns: 38px minmax(0, 1fr); }
  .skill-item img,
  .skill-icon { width: 36px; height: 36px; }
  .skill-item h4 { font-size: 14.5px; }
  .skill-item p { font-size: 13px; }
  .projects-grid { grid-template-columns: 1fr; }
  .cert-grid     { grid-template-columns: 1fr; }

  /* About */
  .about-info-grid { grid-template-columns: 1fr; }

  /* Contact form */
  .contact-form-wrap { padding: 22px 18px; }

  /* Footer */
  .footer-inner { flex-direction: column; align-items: center; text-align: center; gap: 12px; }
}
/* ===== EXPERIENCE TIMELINE ===== */
.experience-page { background: #070c18; }
.experience-page .experience-navbar {
  height: 118px;
  padding: 0 38px;
  background: #080d19;
  border-bottom: 1px solid rgba(148,163,184,0.17);
  box-shadow: none;
  transform: none !important;
}
.experience-page .experience-logo {
  color: #f1f5ff;
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -2px;
}
.experience-page .experience-logo span { color: #42e6df; }
.experience-page .nav-links { gap: 34px; }
.experience-page .nav-links a {
  color: #a7b2c9;
  font-size: 17px;
  font-weight: 500;
}
.experience-page .nav-links a::after { display: none; }
.experience-page .nav-links a:hover,
.experience-page .nav-links a.active { color: #f1f5ff; }
.experience-page .nav-actions { gap: 16px; }
.experience-theme-toggle { display: none; }
.experience-shortcut,
.experience-resume {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 62px;
  border: 1px solid rgba(148,163,184,0.2);
  border-radius: 16px;
  color: #b7c2d8;
  background: #0d1424;
  font: 500 16px var(--font-body);
}
.experience-shortcut { min-width: 110px; gap: 7px; }
.experience-shortcut span { font-size: 21px; }
.experience-resume {
  min-width: 168px;
  gap: 12px;
  color: #edf2ff;
  background: transparent;
  font-size: 19px;
  font-weight: 700;
}
.experience-resume:hover { border-color: #42e6df; color: #42e6df; }
.experience-section {
  min-height: calc(100vh - 78px);
  padding: 126px 0 128px;
  background: #070c18;
}
.experience-container { max-width: none; padding-right: 50px; padding-left: 50px; }
.experience-intro { margin-bottom: 64px; }
.experience-kicker,
.timeline-date {
  color: #2ee6e0;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 2.4px;
}
.experience-intro h1 {
  margin-top: 24px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: clamp(48px, 6vw, 88px);
  font-weight: 300;
  letter-spacing: -0.07em;
  line-height: 0.98;
}
.experience-timeline {
  position: relative;
  width: min(100%, 1260px);
  margin: 0 0 0 clamp(235px, 14.7vw, 285px);
  padding: 0 0 0 66px;
  list-style: none;
}
.experience-timeline::before {
  position: absolute;
  top: 0;
  bottom: 32px;
  left: 0;
  width: 1px;
  content: "";
  background: linear-gradient(180deg, rgba(46,230,224,0.22), rgba(46,230,224,0.06));
}
.timeline-entry {
  position: relative;
  padding-bottom: 88px;
}
.timeline-entry:last-child { padding-bottom: 0; }
.timeline-dot {
  position: absolute;
  top: 6px;
  left: -74px;
  width: 16px;
  height: 16px;
  border: 3px solid var(--bg);
  border-radius: 50%;
  background: #32dce1;
  box-shadow: 0 0 0 1px rgba(50,220,225,0.32), 0 0 20px rgba(50,220,225,0.65);
}
.timeline-content { max-width: 900px; }
.timeline-date { margin-bottom: 28px; }
.timeline-content h2 {
  margin-bottom: 12px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: clamp(25px, 2.15vw, 34px);
  font-weight: 400;
  letter-spacing: -0.045em;
  line-height: 1.05;
}
.timeline-content h3 {
  margin-bottom: 24px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: clamp(16px, 1.35vw, 20px);
  font-weight: 700;
}
.timeline-content > p:last-child {
  color: #91a8cc;
  font-size: clamp(16px, 1.45vw, 21px);
  line-height: 1.55;
}
body.light-mode .experience-section { background: #f5f9ff; }
body.light-mode .timeline-dot { border-color: #f5f9ff; }
body.light-mode .timeline-content > p:last-child { color: #537097; }

/* ===== ACHIEVEMENT ===== */
.achievement-section {
  padding: 112px 0;
  background: var(--bg-alt);
}
.achievement-card {
  display: flex;
  align-items: flex-start;
  gap: 28px;
  max-width: 900px;
  margin: 0 auto;
  padding: 34px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.16);
}
.achievement-icon {
  display: grid;
  place-items: center;
  flex: 0 0 58px;
  width: 58px;
  height: 58px;
  color: #070c18;
  background: linear-gradient(135deg, var(--a1), var(--a2));
  border-radius: 14px;
  font-family: var(--font-display);
  font-size: 25px;
  font-weight: 800;
}
.achievement-content { flex: 1; }
.achievement-kicker {
  margin-bottom: 8px;
  color: var(--a1);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}
.achievement-content h3 {
  margin-bottom: 12px;
  color: var(--text);
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 32px);
}
.achievement-content > p {
  max-width: 680px;
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1.7;
}
.achievement-content strong { color: var(--a1); }
.achievement-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 24px;
  color: var(--a1);
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.6px;
  text-decoration: none;
}
.achievement-link:hover { color: var(--text); }
.achievement-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  margin-top: 25px;
}
.achievement-metrics > div {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.metric-value {
  color: var(--text);
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 800;
}
.metric-label {
  color: var(--text-muted);
  font-size: 12px;
  letter-spacing: 0.4px;
  text-transform: uppercase;
}

@media (max-width: 700px) {
  .experience-page .experience-navbar { height: 78px; padding: 0 20px; }
  .experience-page .experience-logo { font-size: 28px; }
  .experience-page .nav-links,
  .experience-shortcut { display: none; }
  .experience-resume { min-width: 116px; height: 48px; border-radius: 12px; font-size: 15px; }
  .experience-section { padding: 96px 0 80px; }
  .experience-container { padding-right: 22px; padding-left: 22px; }
  .experience-intro { margin-bottom: 48px; }
  .experience-timeline { margin-left: 0; padding-left: 42px; }
  .experience-section .experience-timeline { width: 100%; padding-left: 38px; }
  .timeline-entry { padding-bottom: 62px; }
  .timeline-dot { left: -46px; }
  .timeline-content h2 { font-size: 25px; line-height: 1.12; }
  .timeline-content > p:last-child { font-size: 16px; line-height: 1.6; }
  .timeline-date { font-size: 11px; letter-spacing: 1.6px; margin-bottom: 19px; }
  .timeline-content h3 { margin-bottom: 16px; }
  .achievement-section { padding: 80px 0; }
  .achievement-card { gap: 20px; padding: 25px 20px; }
  .achievement-icon { flex-basis: 48px; width: 48px; height: 48px; font-size: 21px; }
  .achievement-metrics { gap: 22px; }
}