/* ============================================================
   IBAD PORTFOLIO — PREMIUM CSS
   Typography: Syne (display) + DM Sans (body) + JetBrains Mono
   Accent: Electric Indigo #6366F1
   Motif: Geometric grid lines + grain noise texture
   ============================================================ */

/* ─── CUSTOM PROPERTIES ─── */
:root {
  --bg-base:      #0A0A0F;
  --bg-surface:   #111118;
  --bg-surface-2: #17171F;
  --bg-elevated:  #1E1E2A;
  --bg-card:      rgba(17,17,24,0.9);
  --bg-glass:     rgba(17,17,24,0.6);

  --text-primary:   #FAFAFA;
  --text-secondary: #A0A0B5;
  --text-muted:     #6B6B80;
  --text-dim:       #3F3F50;

  --accent:        #3B82F6;
  --accent-dim:    #1D4ED8;
  --accent-2:      #60A5FA;
  --accent-glow:   rgba(59,130,246,0.25);
  --accent-subtle: rgba(59,130,246,0.08);
  --accent-rgb:    59,130,246;

  --border:        rgba(255,255,255,0.07);
  --border-accent: rgba(59,130,246,0.3);
  --border-strong: rgba(255,255,255,0.12);

  --nav-bg:         rgba(10,10,15,0.85);
  --nav-bg-scrolled:rgba(10,10,15,0.96);
  --nav-border:     rgba(255,255,255,0.06);

  --gradient-accent: linear-gradient(135deg, #2563EB 0%, #3B82F6 60%, #60A5FA 100%);
  --gradient-warm:   linear-gradient(135deg, #1E3A8A 0%, #1D4ED8 50%, #3B82F6 100%);
  --gradient-card:   linear-gradient(135deg, rgba(17,17,24,0.95) 0%, rgba(30,30,42,0.8) 100%);

  --shadow-sm:  0 2px 8px rgba(0,0,0,0.3);
  --shadow-md:  0 8px 30px rgba(0,0,0,0.4);
  --shadow-lg:  0 20px 60px rgba(0,0,0,0.5);
  --shadow-xl:  0 30px 80px rgba(0,0,0,0.6);
  --glow-sm:    0 0 20px rgba(59,130,246,0.2);
  --glow-md:    0 0 40px rgba(59,130,246,0.3);
  --glow-lg:    0 0 80px rgba(59,130,246,0.4);

  --radius-sm:  8px;
  --radius-md:  16px;
  --radius-lg:  24px;
  --radius-xl:  32px;
  --radius-full:9999px;

  --ease-in-out:   cubic-bezier(0.4,0,0.2,1);
  --ease-out:      cubic-bezier(0,0,0.2,1);
  --ease-spring:   cubic-bezier(0.34,1.56,0.64,1);
  --ease-smooth:   cubic-bezier(0.25,0.46,0.45,0.94);

  --transition-fast:   0.15s var(--ease-in-out);
  --transition-medium: 0.3s  var(--ease-in-out);
  --transition-slow:   0.6s  var(--ease-smooth);

  --section-padding: clamp(5rem,10vw,8rem);
  --container-max: 1280px;
  --container-pad: clamp(1.5rem,5vw,4rem);
}

[data-theme="light"] {
  --bg-base:      #F8F7F4;
  --bg-surface:   #FFFFFF;
  --bg-surface-2: #F1F0EC;
  --bg-elevated:  #E8E7E3;
  --bg-card:      rgba(255,255,255,0.92);
  --bg-glass:     rgba(255,255,255,0.7);

  --text-primary:   #0A0A0F;
  --text-secondary: #3F3F55;
  --text-muted:     #7B7B95;
  --text-dim:       #AFAFC5;

  --accent:        #1D4ED8;
  --accent-dim:    #2563EB;
  --accent-2:      #3B82F6;
  --accent-glow:   rgba(29,78,216,0.2);
  --accent-subtle: rgba(29,78,216,0.06);
  --accent-rgb:    29,78,216;

  --border:        rgba(0,0,0,0.07);
  --border-accent: rgba(29,78,216,0.25);
  --border-strong: rgba(0,0,0,0.12);

  --nav-bg:          rgba(248,247,244,0.88);
  --nav-bg-scrolled: rgba(248,247,244,0.97);
  --nav-border:      rgba(0,0,0,0.07);

  --gradient-accent: linear-gradient(135deg, #1D4ED8 0%, #2563EB 60%, #3B82F6 100%);
  --gradient-warm:   linear-gradient(135deg, #1E3A8A 0%, #1D4ED8 50%, #2563EB 100%);
  --gradient-card:   linear-gradient(135deg, rgba(255,255,255,0.95) 0%, rgba(241,240,236,0.9) 100%);

  --shadow-sm:  0 2px 8px rgba(0,0,0,0.06);
  --shadow-md:  0 8px 30px rgba(0,0,0,0.1);
  --shadow-lg:  0 20px 60px rgba(0,0,0,0.12);
  --shadow-xl:  0 30px 80px rgba(0,0,0,0.15);
  --glow-sm:    0 0 20px rgba(29,78,216,0.15);
  --glow-md:    0 0 40px rgba(29,78,216,0.2);
  --glow-lg:    0 0 80px rgba(29,78,216,0.25);
}

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: 'DM Sans', -apple-system, sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection { background: rgba(var(--accent-rgb),0.3); color: var(--text-primary); }

img { max-width:100%; display:block; }
a { text-decoration:none; color:inherit; }
button { cursor:pointer; border:none; background:none; font:inherit; }
input, textarea { font:inherit; }
ul, ol { list-style:none; }

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

/* ─── NOISE OVERLAY ─── */
.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9998;
  opacity: 0.35;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)' opacity='0.06'/%3E%3C/svg%3E");
}

[data-theme="light"] .noise { opacity: 0.2; }

/* ─── GRID MOTIF BACKGROUND ─── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(var(--accent-rgb),0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(var(--accent-rgb),0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: -1;
}

/* ─── SCROLL PROGRESS ─── */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: transparent;
  z-index: 9999;
  transform-origin: left;
  transform: scaleX(0);
  background: var(--gradient-accent);
  box-shadow: 0 0 10px rgba(var(--accent-rgb),0.5);
  will-change: transform;
}

/* ─── PRELOADER ─── */
#preloader {
  position: fixed;
  inset: 0;
  background: var(--bg-base);
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 2rem;
}

.preloader-logo {
  font-family: 'Syne', sans-serif;
  font-size: clamp(3rem, 10vw, 7rem);
  font-weight: 800;
  letter-spacing: -0.05em;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  overflow: hidden;
}

.preloader-logo span {
  display: inline-block;
  transform: translateY(110%);
}

.preloader-bar-wrap {
  width: min(300px, 80vw);
  height: 2px;
  background: var(--border);
  border-radius: 1px;
  overflow: hidden;
}

.preloader-bar {
  height: 100%;
  width: 0%;
  background: var(--gradient-accent);
  border-radius: 1px;
  box-shadow: 0 0 8px rgba(var(--accent-rgb),0.6);
  transition: width 0.05s linear;
}

.preloader-icon {
  position: relative;
  width: 72px;
  height: 72px;
  flex-shrink: 0;
}

.preloader-ring {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  animation: pl-rotate 2s linear infinite;
}

.ring-track {
  stroke: var(--border);
  stroke-width: 1.5;
}

.ring-spin {
  stroke: var(--accent);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-dasharray: 51 119;
  filter: drop-shadow(0 0 5px rgba(var(--accent-rgb), 0.8));
}

.preloader-icon-code {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.05em;
}

@keyframes pl-rotate {
  to { transform: rotate(360deg); }
}

.preloader-count {
  position: absolute;
  bottom: 3rem;
  right: 3rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
}

/* ─── CUSTOM CURSOR ─── */
.cursor-dot, .cursor-ring {
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: 99997;
  transform: translate(-50%, -50%);
  will-change: transform;
}

.cursor-dot {
  width: 6px; height: 6px;
  background: var(--accent);
  transition: transform 0.1s, width 0.3s var(--ease-spring), height 0.3s var(--ease-spring), background 0.3s;
}

.cursor-ring {
  width: 36px; height: 36px;
  border: 1.5px solid rgba(var(--accent-rgb),0.5);
  transition: width 0.4s var(--ease-spring), height 0.4s var(--ease-spring), border-color 0.3s, background 0.3s;
}

body.cursor-hover .cursor-dot {
  width: 10px; height: 10px;
  background: white;
}

body.cursor-hover .cursor-ring {
  width: 60px; height: 60px;
  background: transparent;
  border-color: rgba(var(--accent-rgb),0.6);
}

body.cursor-text .cursor-ring {
  width: 80px; height: 80px;
  background: rgba(var(--accent-rgb),0.08);
  border-color: var(--accent);
}

@media (pointer: coarse) {
  .cursor-dot, .cursor-ring { display:none; }
}

/* ─── NAVIGATION ─── */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 900;
  padding: 0 var(--container-pad);
  backdrop-filter: blur(0px);
  -webkit-backdrop-filter: blur(0px);
  border-bottom: 1px solid transparent;
  transition: backdrop-filter 0.4s, background 0.4s, border-color 0.4s, box-shadow 0.4s;
}

#nav.scrolled {
  background: var(--nav-bg-scrolled);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom-color: var(--nav-border);
  box-shadow: 0 4px 30px rgba(0,0,0,0.15);
}

.nav-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-logo {
  font-family: 'Syne', sans-serif;
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: opacity 0.3s;
}

.nav-logo:hover { opacity: 0.8; }

.nav-logo-code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--accent);
  -webkit-text-fill-color: var(--accent);
  background: var(--accent-subtle);
  border: 1px solid var(--border-accent);
  border-radius: 4px;
  padding: 2px 6px;
  letter-spacing: -0.02em;
  flex-shrink: 0;
  transition: background 0.2s, border-color 0.2s;
}

.nav-logo:hover .nav-logo-code {
  background: rgba(var(--accent-rgb), 0.15);
  border-color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  position: relative;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: color var(--transition-medium);
  overflow: hidden;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 6px; left: 14px;
  width: 0; height: 1.5px;
  background: var(--gradient-accent);
  border-radius: 1px;
  transition: width 0.3s var(--ease-out);
}

.nav-link:hover { color: var(--text-primary); }
.nav-link:hover::after,
.nav-link.active::after { width: calc(100% - 28px); }
.nav-link.active { color: var(--text-primary); }

.nav-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Theme Toggle */
.theme-toggle {
  position: relative;
  width: 52px; height: 28px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-full);
  overflow: hidden;
  transition: border-color 0.3s;
}

.theme-toggle:hover { border-color: var(--border-accent); }

.theme-toggle-thumb {
  position: absolute;
  top: 3px; left: 3px;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--gradient-accent);
  transition: transform 0.4s var(--ease-spring);
  box-shadow: 0 0 8px rgba(var(--accent-rgb),0.5);
  display: flex; align-items:center; justify-content:center;
}

[data-theme="light"] .theme-toggle-thumb { transform: translateX(24px); }

.theme-toggle-icon {
  width: 12px; height: 12px;
  fill: white;
  position: absolute;
  transition: opacity 0.3s;
}

.icon-moon { opacity:1; }
.icon-sun  { opacity:0; }
[data-theme="light"] .icon-moon { opacity:0; }
[data-theme="light"] .icon-sun  { opacity:1; }

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px; height: 40px;
  padding: 8px;
  border-radius: var(--radius-sm);
  transition: background 0.2s;
}

.nav-hamburger:hover { background: var(--accent-subtle); }

.hamburger-bar {
  width: 100%; height: 1.5px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: transform 0.3s var(--ease-in-out), opacity 0.3s;
  display: block;
}

.nav-hamburger.open .hamburger-bar:nth-child(1) { transform: rotate(45deg) translate(4px,4px); }
.nav-hamburger.open .hamburger-bar:nth-child(2) { opacity:0; }
.nav-hamburger.open .hamburger-bar:nth-child(3) { transform: rotate(-45deg) translate(4px,-4px); }

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  inset: 0;
  background: var(--bg-base);
  z-index: 899;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s;
}

.mobile-menu.open { opacity:1; pointer-events:all; }

.mobile-menu .nav-link {
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.5rem,6vw,2.5rem);
  font-weight: 700;
  padding: 0.75rem 2rem;
  transform: translateY(20px);
  opacity: 0;
  transition: transform 0.4s var(--ease-spring), opacity 0.4s, color 0.2s;
}

.mobile-menu.open .nav-link {
  transform: translateY(0);
  opacity: 1;
}

/* Stagger delays */
.mobile-menu .nav-link:nth-child(1) { transition-delay: 0.05s; }
.mobile-menu .nav-link:nth-child(2) { transition-delay: 0.1s; }
.mobile-menu .nav-link:nth-child(3) { transition-delay: 0.15s; }
.mobile-menu .nav-link:nth-child(4) { transition-delay: 0.2s; }
.mobile-menu .nav-link:nth-child(5) { transition-delay: 0.25s; }
.mobile-menu .nav-link:nth-child(6) { transition-delay: 0.3s; }
.mobile-menu .nav-link:nth-child(7) { transition-delay: 0.35s; }

/* ─── HERO ─── */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 8rem var(--container-pad) 4rem;
}

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

.hero-orbs {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.25;
  animation: orbFloat 20s ease-in-out infinite;
}

.hero-orb-1 {
  width: 40vw; height: 40vw;
  background: radial-gradient(circle, rgba(var(--accent-rgb),0.6), transparent 70%);
  top: -10%; left: 60%;
  animation-delay: 0s;
}

.hero-orb-2 {
  width: 30vw; height: 30vw;
  background: radial-gradient(circle, rgba(37,99,235,0.5), transparent 70%);
  top: 60%; left: -5%;
  animation-delay: -7s;
}

.hero-orb-3 {
  width: 20vw; height: 20vw;
  background: radial-gradient(circle, rgba(var(--accent-rgb),0.4), transparent 70%);
  top: 40%; left: 50%;
  animation-delay: -14s;
}

@keyframes orbFloat {
  0%,100% { transform: translate(0,0) scale(1); }
  33%      { transform: translate(-30px,20px) scale(1.05); }
  66%      { transform: translate(20px,-30px) scale(0.95); }
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: var(--container-max);
  width: 100%;
  margin: 0 auto;
}

.hero-eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  overflow: hidden;
}

.hero-eyebrow::before {
  content: '';
  display: block;
  width: 40px; height: 1px;
  background: var(--accent);
}

.hero-title {
  font-family: 'Syne', sans-serif;
  font-size: clamp(3rem, 8vw, 7.5rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.04em;
  color: var(--text-primary);
  margin-bottom: 2rem;
}

.hero-title .word { display: inline-block; overflow: hidden; }
.hero-title .char {
  display: inline-block;
  transform: translateY(110%);
}

.hero-title .accent-word {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 520px;
  line-height: 1.7;
  margin-bottom: 3rem;
  overflow: hidden;
}

.hero-sub p { transform: translateY(40px); opacity: 0; }

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  overflow: hidden;
}

.hero-cta-inner {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  transform: translateY(30px);
  opacity: 0;
}

.hero-scroll {
  position: absolute;
  bottom: 3rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  opacity: 0;
}

.scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%   { transform: scaleY(0); transform-origin: top; }
  50%  { transform: scaleY(1); transform-origin: top; }
  51%  { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ─── BUTTONS ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 14px 28px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.2s var(--ease-spring), box-shadow 0.2s, background 0.2s, color 0.2s, border-color 0.2s;
  position: relative;
  overflow: hidden;
}

.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--gradient-accent);
  color: white;
  box-shadow: var(--glow-sm), 0 4px 15px rgba(var(--accent-rgb),0.3);
}

.btn-primary:hover {
  box-shadow: var(--glow-md), 0 8px 25px rgba(var(--accent-rgb),0.4);
}

.btn-primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, transparent, rgba(255,255,255,0.15), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s;
}
.btn-primary:hover::after { transform: translateX(100%); }

.btn-ghost {
  background: transparent;
  color: var(--accent);
  border: 1.5px solid var(--border-accent);
  padding: 18px 36px;
}

.btn-ghost:hover {
  background: var(--accent-subtle);
  border-color: var(--accent);
}

.btn-icon {
  width: 18px; height: 18px;
  flex-shrink: 0;
  transition: transform 0.3s var(--ease-spring);
}

.btn:hover .btn-icon { transform: translateX(3px); }

/* ─── SECTION BASE ─── */
.section {
  padding: var(--section-padding) var(--container-pad);
  position: relative;
  overflow: hidden;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  width: 100%;
}

.section-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.section-label::before {
  content: '';
  width: 32px; height: 1px;
  background: var(--accent);
}

.section-title {
  font-family: 'Syne', sans-serif;
  font-size: clamp(2.5rem,5vw,4rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

.section-subtitle {
  font-size: clamp(1rem,1.5vw,1.1rem);
  color: var(--text-secondary);
  max-width: 520px;
  line-height: 1.7;
}

/* ─── ABOUT SECTION ─── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6rem;
  align-items: start;
  margin-top: 5rem;
}

.about-text-block { max-width: 560px; }

.about-lead {
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.1rem,1.8vw,1.3rem);
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.about-body {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 2rem;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 1.5rem;
  margin: 2.5rem 0;
  padding: 2rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.stat-item { text-align: center; }

.stat-number {
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.8rem,4vw,2.8rem);
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 0.3rem;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.05em;
}

.about-image-col {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

.about-photo-wrap {
  position: relative;
  width: 380px;
  max-width: 100%;
}

.about-photo-frame {
  position: relative;
  width: 100%;
  padding-bottom: 110%;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--bg-surface);
}

.about-photo-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.about-photo-frame::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(var(--accent-rgb),0.12) 100%);
  z-index: 1;
}

.about-deco-ring {
  position: absolute;
  inset: -16px;
  border-radius: calc(var(--radius-xl) + 16px);
  border: 1.5px solid var(--border-accent);
  pointer-events: none;
}

.about-badge {
  position: absolute;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-md);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  z-index: 2;
}

.about-badge-icon {
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  object-fit: contain;
}

.badge-1 { top: 8%; right: -30px; animation: badgeFloat 4s ease-in-out infinite; }
.badge-2 { bottom: 20%; left: -40px; animation: badgeFloat 5s ease-in-out infinite 1s; }
.badge-3 { bottom: 5%; right: -20px; animation: badgeFloat 3.5s ease-in-out infinite 0.5s; }

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

.about-availability {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 2rem;
  padding: 0.6rem 1.2rem;
  background: rgba(34,197,94,0.1);
  border: 1px solid rgba(34,197,94,0.25);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  color: #4ade80;
}

.availability-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #4ade80;
  animation: statusPulse 2s ease-in-out infinite;
}

@keyframes statusPulse {
  0%,100% { box-shadow: 0 0 0 0 rgba(74,222,128,0.4); }
  50%      { box-shadow: 0 0 0 6px rgba(74,222,128,0); }
}

/* Education Cards */
.edu-cards { display:flex; flex-direction:column; gap:1rem; margin-top:2rem; }

.edu-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--accent);
  transition: transform var(--transition-medium), box-shadow var(--transition-medium), border-color var(--transition-medium);
}

.edu-card:hover {
  transform: translateX(6px);
  border-left-color: var(--accent-2);
  box-shadow: var(--glow-sm);
}

.edu-card-icon {
  width: 44px; height: 44px;
  background: var(--accent-subtle);
  border-radius: var(--radius-sm);
  display: flex; align-items:center; justify-content:center;
  color: var(--accent);
  flex-shrink: 0;
}

.edu-title { font-weight: 600; font-size:0.95rem; color: var(--text-primary); }
.edu-subtitle { font-size: 0.8rem; color: var(--accent); margin-top:2px; }
.edu-period { font-size:0.75rem; color: var(--text-muted); margin-top:2px; }

/* ─── SKILLS SECTION ─── */
.skills-layout { margin-top: 4rem; }

.skills-tabs {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
  padding: 0.4rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  width: fit-content;
}

.skill-tab {
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: all 0.25s var(--ease-in-out);
}

.skill-tab.active,
.skill-tab:hover {
  background: var(--accent);
  color: white;
  box-shadow: var(--glow-sm);
}

.skills-panel { display:none; }
.skills-panel.active { display:grid; grid-template-columns: repeat(auto-fill, minmax(200px,1fr)); gap:1rem; }

.skill-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: transform var(--transition-medium), border-color var(--transition-medium), box-shadow var(--transition-medium);
  cursor: default;
}

.skill-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-md), var(--glow-sm);
}

.skill-icon-wrap {
  width: 50px; height: 50px;
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  overflow: hidden;
  transition: border-color 0.3s, box-shadow 0.3s var(--ease-out);
}

.skill-card:hover .skill-icon-wrap {
  border-color: var(--border-accent);
  box-shadow: var(--glow-sm);
}

.skill-icon-wrap img {
  width: 28px; height: 28px;
  object-fit: contain;
  filter: grayscale(0.1);
  transition: filter 0.3s, transform 0.35s var(--ease-spring);
}

.skill-card:hover .skill-icon-wrap img {
  filter: grayscale(0);
  transform: scale(1.15) rotate(5deg);
}

.skill-icon-wrap i {
  font-size: 1.65rem;
  line-height: 1;
  transition: transform 0.35s var(--ease-spring);
}

.skill-card:hover .skill-icon-wrap i {
  transform: scale(1.2) rotate(-4deg);
}

.skill-icon-abbr {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--accent);
  line-height: 1.2;
  text-align: center;
}

.skill-name {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.skill-level {
  font-size: 0.72rem;
  color: var(--accent);
  margin-top: 2px;
  font-weight: 500;
}

/* ─── LOGO MARQUEE SECTION ─── */
.logo-marquee-section {
  padding: clamp(3rem, 6vw, 5rem) 0;
  overflow: hidden;
  border-top: 1px solid var(--border);
}

.logo-marquee-wrap {
  display: flex;
  flex-direction: column;
  gap: 1.125rem;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(to right, transparent 0%, black 10%, black 90%, transparent 100%);
  mask-image: linear-gradient(to right, transparent 0%, black 10%, black 90%, transparent 100%);
}

.logo-marquee-row { overflow: hidden; }

.logo-track {
  display: flex;
  gap: 0.875rem;
  width: max-content;
  animation: marqueeLeft 40s linear infinite;
  will-change: transform;
}

.logo-track--reverse {
  animation: marqueeRight 38s linear infinite;
}

@keyframes marqueeLeft {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

@keyframes marqueeRight {
  0%   { transform: translateX(-50%); }
  100% { transform: translateX(0); }
}

.logo-marquee-wrap:hover .logo-track {
  animation-play-state: paused;
}

.logo-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.625rem 1.25rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  white-space: nowrap;
  flex-shrink: 0;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
  cursor: default;
  user-select: none;
}

.logo-item:hover {
  border-color: var(--border-accent);
  background: var(--bg-surface-2);
  box-shadow: var(--glow-sm);
}

.logo-item i {
  font-size: 1.35rem;
  line-height: 1;
  flex-shrink: 0;
}

/* devicon nextjs & express are dark — invert in dark mode so they're visible */
[data-theme="dark"] .devicon-nextjs-plain,
[data-theme="dark"] .devicon-express-original,
[data-theme="dark"] .devicon-github-original,
[data-theme="dark"] .devicon-linux-plain {
  color: #e0e0e0;
}

[data-theme="light"] .devicon-nextjs-plain,
[data-theme="light"] .devicon-express-original,
[data-theme="light"] .devicon-github-original,
[data-theme="light"] .devicon-linux-plain {
  color: #1a1a1a;
}

.logo-item span {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

@media (prefers-reduced-motion: reduce) {
  .logo-track,
  .logo-track--reverse { animation: none; }
}

/* ─── PROJECTS SECTION ─── */
.projects-filter {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.filter-btn {
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  transition: all 0.25s var(--ease-in-out);
}

.filter-btn.active, .filter-btn:hover {
  background: var(--accent-subtle);
  border-color: var(--border-accent);
  color: var(--accent);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(12,1fr);
  gap: 1.5rem;
}

.project-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-medium), box-shadow var(--transition-medium);
  will-change: transform;
}

.project-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-lg), var(--glow-sm);
}

.project-card-featured { grid-column: span 7; }
.project-card-normal   { grid-column: span 5; }

.project-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/10;
  background: var(--bg-elevated);
  flex-shrink: 0;
}

.project-card-featured .project-thumb { aspect-ratio: 16/9; }

.project-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease-smooth);
}

.project-card:hover .project-thumb img { transform: scale(1.05); }

.project-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 30%, rgba(var(--accent-rgb),0.85) 100%);
  opacity: 0;
  transition: opacity 0.4s;
  display: flex;
  align-items: flex-end;
  padding: 1.5rem;
}

.project-card:hover .project-overlay { opacity:1; }

.project-overlay-text {
  font-family: 'Syne', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: white;
  transform: translateY(12px);
  transition: transform 0.4s var(--ease-spring);
}
.project-card:hover .project-overlay-text { transform: translateY(0); }

.project-body { padding: 1.5rem; flex: 1; display:flex; flex-direction:column; }

.project-category {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.project-name {
  font-family: 'Syne', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.6rem;
  line-height: 1.3;
}

.project-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.65;
  flex: 1;
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  line-clamp: 3;
  overflow: hidden;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.tag {
  padding: 0.25rem 0.7rem;
  background: var(--accent-subtle);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--accent);
}

.project-links {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: auto;
}

.project-link {
  display: flex; align-items:center; justify-content:center;
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: all 0.2s;
}

.project-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-subtle);
}

/* ─── EXPERIENCE / TIMELINE ─── */
.timeline {
  position: relative;
  max-width: 900px;
  margin: 4rem auto 0;
}

.timeline-line {
  position: absolute;
  left: 50%;
  top: 0; bottom: 0;
  width: 1px;
  background: var(--border);
  transform: translateX(-50%);
}

.timeline-line-fill {
  width: 100%;
  height: 0%;
  background: var(--gradient-accent);
  border-radius: 1px;
  box-shadow: 0 0 10px rgba(var(--accent-rgb),0.4);
  transition: height 0.1s linear;
}

.timeline-item {
  display: grid;
  grid-template-columns: 1fr 60px 1fr;
  gap: 0;
  margin-bottom: 4rem;
  position: relative;
  align-items: start;
}

.timeline-item:last-child { margin-bottom: 0; }

.timeline-item-left  { padding-right: 40px; }
.timeline-item-right { padding-left: 40px; }

.timeline-item:nth-child(odd) .timeline-item-left   { grid-column:1; }
.timeline-item:nth-child(odd) .timeline-item-center { grid-column:2; }
.timeline-item:nth-child(odd) .timeline-item-right  { grid-column:3; }

.timeline-item:nth-child(even) .timeline-card { grid-column:3; }

.timeline-center {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding-top: 1.5rem;
}

.timeline-dot {
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--bg-base);
  border: 2.5px solid var(--accent);
  box-shadow: 0 0 0 4px rgba(var(--accent-rgb),0.1), var(--glow-sm);
  flex-shrink: 0;
  z-index: 2;
}

.timeline-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: border-color var(--transition-medium), box-shadow var(--transition-medium), transform var(--transition-medium);
}

.timeline-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-md), var(--glow-sm);
  transform: translateY(-2px);
}

.timeline-period {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.timeline-role {
  font-family: 'Syne', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.timeline-company {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 0.75rem;
}

.timeline-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 1rem;
}

.timeline-tags { display:flex; flex-wrap:wrap; gap:0.4rem; }

/* ─── CERTIFICATES ─── */
.certs-filter {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.cert-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--transition-medium), border-color var(--transition-medium), box-shadow var(--transition-medium);
}

.cert-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-md), var(--glow-sm);
}

.cert-thumb {
  aspect-ratio: 4/3;
  background: var(--bg-elevated);
  overflow: hidden;
}

.cert-thumb img {
  width: 100%; height: 100%;
  object-fit: contain;
  transition: transform 0.5s var(--ease-smooth);
}

.cert-card:hover .cert-thumb img { transform: scale(1.05); }

.cert-body { padding: 1.25rem 1.5rem; }

.cert-category {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
  padding: 0.2rem 0.7rem;
  border-radius: var(--radius-full);
  display: inline-block;
}

.cat-academic    { background:rgba(16,185,129,0.12); color:#34d399; }
.cat-organization{ background:rgba(59,130,246,0.12); color:var(--accent-2); }
.cat-competition { background:rgba(245,158,11,0.12); color:#fbbf24; }

.cert-title {
  font-family: 'Syne', sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.3rem;
  line-height: 1.3;
}

.cert-desc { font-size:0.8rem; color:var(--text-muted); }

/* ─── CONTACT SECTION ─── */
.contact-intro {
  font-size: clamp(1rem,1.8vw,1.15rem);
  color: var(--text-secondary);
  max-width: 640px;
  line-height: 1.75;
  margin-top: 0.5rem;
  margin-bottom: 3rem;
}

.contact-socials {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.contact-social-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: transform var(--transition-medium), border-color var(--transition-medium), box-shadow var(--transition-medium);
}

.contact-social-link:hover {
  transform: translateX(6px);
  border-color: var(--border-accent);
  box-shadow: var(--glow-sm);
}

.social-icon-wrap {
  width: 44px; height: 44px;
  border-radius: var(--radius-sm);
  display: flex; align-items:center; justify-content:center;
  flex-shrink: 0;
  font-size: 1.1rem;
}

.social-icon-wrap svg { width:20px; height:20px; fill:white; }

.social-name { font-weight: 600; font-size:0.9rem; color:var(--text-primary); }
.social-handle { font-size:0.78rem; color:var(--text-muted); margin-top:1px; }

.social-arrow {
  width: 16px; height: 16px;
  color: var(--text-muted);
  margin-left: auto;
  transition: transform 0.3s, color 0.3s;
}
.contact-social-link:hover .social-arrow { transform: translate(4px,-4px); color:var(--accent); }

/* Contact Form */
.contact-form { display:flex; flex-direction:column; gap:1.25rem; }

.form-group { position: relative; }

.form-input {
  width: 100%;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1rem 0.75rem;
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb),0.12);
}

.form-input.invalid { border-color: #ef4444; }
.form-input.valid   { border-color: #22c55e; }

.form-label {
  position: absolute;
  top: 50%;
  left: 1rem;
  transform: translateY(-50%);
  font-size: 0.9rem;
  color: var(--text-muted);
  pointer-events: none;
  transition: top 0.2s, font-size 0.2s, color 0.2s, transform 0.2s;
}

textarea ~ .form-label { top: 1.25rem; transform: none; }

.form-input:focus ~ .form-label,
.form-input:not(:placeholder-shown) ~ .form-label {
  top: 0.55rem;
  font-size: 0.72rem;
  color: var(--accent);
  transform: none;
}

textarea { resize: vertical; min-height: 130px; padding-top: 1.75rem; }
textarea ~ .form-label { top: 0.6rem; font-size: 0.72rem; }

.form-error {
  font-size: 0.72rem;
  color: #ef4444;
  margin-top: 0.3rem;
  display: none;
}

.form-input.invalid + .form-error { display:block; }

.form-submit {
  width: 100%;
  padding: 1rem;
  background: var(--gradient-accent);
  color: white;
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius-md);
  transition: opacity 0.3s, transform 0.2s var(--ease-spring), box-shadow 0.2s;
  box-shadow: var(--glow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.form-submit:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: var(--glow-md);
}

.form-success {
  display: none;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1rem;
  padding: 3rem 2rem;
  background: var(--bg-surface);
  border: 1px solid rgba(34,197,94,0.3);
  border-radius: var(--radius-lg);
}

.form-success.show { display:flex; }

.success-icon {
  width: 60px; height: 60px;
  border-radius: 50%;
  background: rgba(34,197,94,0.12);
  display: flex; align-items:center; justify-content:center;
  font-size: 1.8rem;
}

.success-title {
  font-family: 'Syne', sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
}

.success-sub { font-size:0.9rem; color:var(--text-secondary); }

/* ─── FOOTER ─── */
footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  padding: 2.5rem var(--container-pad);
}

.footer-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-logo {
  font-family: 'Syne', sans-serif;
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-copy { font-size:0.8rem; color:var(--text-muted); }

.back-to-top {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--accent-subtle);
  border: 1px solid var(--border-accent);
  display: flex; align-items:center; justify-content:center;
  color: var(--accent);
  transition: all var(--transition-medium);
}

.back-to-top:hover {
  background: var(--accent);
  color: white;
  transform: translateY(-3px);
  box-shadow: var(--glow-sm);
}

.back-to-top svg { width:18px; height:18px; }

/* ─── MOBILE BOTTOM NAV ─── */
.mobile-bottom-nav {
  display: none;
  position: fixed;
  bottom: max(1.25rem, calc(env(safe-area-inset-bottom) + 0.5rem));
  left: 0;
  right: 0;
  margin-inline: auto;
  width: fit-content;
  max-width: calc(100% - 2rem);
  z-index: 800;
  background: var(--nav-bg-scrolled);
  backdrop-filter: blur(28px) saturate(200%);
  -webkit-backdrop-filter: blur(28px) saturate(200%);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-full);
  padding: 6px;
  justify-content: center;
  align-items: center;
  gap: 2px;
  box-shadow:
    0 8px 32px rgba(0,0,0,0.45),
    0 2px 8px rgba(0,0,0,0.3),
    inset 0 1px 0 rgba(255,255,255,0.06);
}

.mb-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  padding: 8px 0;
  width: 60px;
  border-radius: var(--radius-full);
  color: var(--text-muted);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: color 0.25s var(--ease-in-out), background 0.25s var(--ease-in-out), transform 0.2s var(--ease-spring);
  -webkit-tap-highlight-color: transparent;
  flex-shrink: 0;
}

.mb-nav-item svg {
  width: 20px; height: 20px;
  flex-shrink: 0;
  transition: transform 0.3s var(--ease-spring);
}

.mb-nav-item:active { transform: scale(0.92); }

.mb-nav-item.active,
.mb-nav-item:hover {
  color: var(--accent);
  background: var(--accent-subtle);
}

/* Home button — gradient circle icon */
.mb-nav-home { padding: 5px 0; width: 60px; }

.mb-nav-home-icon {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: var(--gradient-accent);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  color: white;
  box-shadow: 0 0 14px rgba(var(--accent-rgb), 0.45), 0 3px 10px rgba(0,0,0,0.3);
  transition: transform 0.35s var(--ease-spring), box-shadow 0.35s;
  animation: floatCenter 3.5s ease-in-out infinite;
}

.mb-nav-home-icon svg { stroke: white; width: 18px; height: 18px; }

.mb-nav-home.active,
.mb-nav-home:hover {
  color: var(--accent);
  background: transparent;
}

.mb-nav-home:hover .mb-nav-home-icon,
.mb-nav-home.active .mb-nav-home-icon {
  transform: scale(1.1);
  box-shadow: 0 0 22px rgba(var(--accent-rgb), 0.65), 0 4px 14px rgba(0,0,0,0.4);
  animation-play-state: paused;
}

.mb-nav-home:active .mb-nav-home-icon { transform: scale(0.93); }

@keyframes floatCenter {
  0%,100% { transform: translateY(0); }
  50%      { transform: translateY(-3px); }
}

/* ─── ANIMATION UTILS ─── */
.reveal {
  opacity: 0;
  transform: translateY(55px);
  transition: opacity 0.85s var(--ease-out), transform 0.85s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-60px);
  transition: opacity 0.85s var(--ease-out), transform 0.85s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal-left.in { opacity: 1; transform: translateX(0); }

.reveal-right {
  opacity: 0;
  transform: translateX(60px);
  transition: opacity 0.85s var(--ease-out), transform 0.85s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal-right.in { opacity:1; transform:translateX(0); }

/* ─── RESPONSIVE ─── */

/* Large desktop: tighten about gap */
@media (max-width: 1280px) {
  .about-grid { gap: 4rem; }
}

/* Tablet landscape */
@media (max-width: 1024px) {
  :root { --section-padding: clamp(4rem, 8vw, 6rem); }

  /* About */
  .about-grid { grid-template-columns: 1fr; gap: 3rem; }
  .about-image-col { max-width: 420px; margin: 0 auto; width: 100%; order: -1; }
  .about-photo-wrap { width: 100%; }
  .badge-1, .badge-2, .badge-3 { display: none; }

  /* Projects: keep 2-col, equal split (6/6 of 12) */
  .project-card-featured { grid-column: span 6; }
  .project-card-normal   { grid-column: span 6; }

  /* Contact */
  .contact-socials { grid-template-columns: 1fr; }

  /* Timeline: collapse to single column */
  .timeline-item { grid-template-columns: 1fr; padding-left: 40px; position: relative; }
  .timeline-line { left: 16px; }
  .timeline-center { position: absolute; left: 8px; top: 20px; }
  .timeline-item-left { padding-right: 0; }
  .timeline-item-right { padding-left: 0; }

  /* Nav */
  .nav-links { display: none; }
}

/* Tablet portrait / large mobile */
@media (max-width: 768px) {
  :root {
    --container-pad: 1.25rem;
    --section-padding: clamp(3rem, 6vw, 4.5rem);
  }

  .hero-title { font-size: clamp(2.4rem, 9vw, 3.5rem); }

  /* About stats: keep 3-col (numbers are compact enough) */
  .about-stats { padding: 1.25rem; gap: 1rem; }

  /* Skills */
  .skills-panel.active { grid-template-columns: 1fr 1fr; }

  /* Projects: single column */
  .projects-grid { grid-template-columns: 1fr; gap: 1rem; }
  .project-card-featured,
  .project-card-normal { grid-column: span 1; }

  /* Certs: 2 col */
  .certs-grid { grid-template-columns: 1fr 1fr; }

  /* Mobile bottom nav */
  .mobile-bottom-nav { display: flex; }
  body { padding-bottom: 96px; }

  /* Footer */
  footer .back-to-top { display: none; }
  .footer-inner { justify-content: center; text-align: center; }
}

/* Mobile portrait — extra tightening before 480px */
@media (max-width: 580px) {
  /* Project cards */
  .project-body { padding: 1.1rem; }
  .project-name { font-size: 1rem; }

  /* Contact links */
  .contact-social-link { padding: 0.85rem 1rem; gap: 0.75rem; }
  .social-icon-wrap { width: 38px; height: 38px; }
  .social-name { font-size: 0.85rem; }
  .social-handle { font-size: 0.72rem; }

  /* Skills tabs fill width */
  .skills-tabs { width: 100%; }
  .skill-tab { flex: 1; text-align: center; padding: 0.6rem 0.75rem; }
}

/* Small mobile */
@media (max-width: 480px) {
  :root { --container-pad: 1rem; }

  /* Hero CTA stack */
  .hero-cta-inner { flex-direction: column; gap: 0.75rem; }
  .btn { width: 100%; justify-content: center; }

  /* About stats: stack vertically */
  .about-stats { grid-template-columns: 1fr; }

  /* Skills: 1 col */
  /* Certs: 1 col */
  .certs-grid { grid-template-columns: 1fr; }

  /* Preloader counter */
  .preloader-count { display: none; }
}

/* ─── REDUCED MOTION ─── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ─── THEME TRANSITION ─── */
html.theme-transitioning * {
  transition: background-color 0s, color 0s, border-color 0s !important;
}