/* ═══════════════════════════════════════════
   UTKUHAN AKAR — PORTFOLIO
   Clean · Premium · Intentional
═══════════════════════════════════════════ */

/* ── TOKENS ── */
:root {
  --font:   'Inter', system-ui, sans-serif;
  --mono:   'JetBrains Mono', 'Fira Code', monospace;

  --bg:     #020617;
  --bg-soft: #0b1220;
  --bg-card: #0d1629;
  --text:   #e2e8f0;
  --muted:  #94a3b8;
  --sub:    #64748b;
  --border: rgba(255,255,255,0.07);
  --border-h: rgba(255,255,255,0.13);
  --accent: #4f8cff;
  --accent2: #818cf8;

  --nav:    58px;
  --r:      12px;
  --r-sm:   8px;
  --ease:   cubic-bezier(0.4, 0, 0.2, 1);
  --t1:     0.15s;
  --t2:     0.25s;
  --t3:     0.5s;
}

[data-theme="light"] {
  --bg:      #f8fafc;
  --bg-soft: #f1f5f9;
  --bg-card: #ffffff;
  --text:    #0f172a;
  --muted:   #475569;
  --sub:     #64748b;
  --border:  rgba(0,0,0,0.08);
  --border-h: rgba(0,0,0,0.14);
  --accent:  #2563eb;
  --accent2: #7c3aed;
}

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; overflow-x: hidden; }
body {
  font-family: var(--font);
  background: radial-gradient(ellipse 100% 60% at 50% 0%, rgba(79,140,255,0.08) 0%, transparent 65%),
              radial-gradient(circle at 50% 100%, rgba(99,102,241,0.04) 0%, transparent 60%),
              #020617;
  background-attachment: fixed;
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  transition: background-color 0.3s, color 0.3s;
  min-height: 100vh;
}
[data-theme="light"] body {
  background: radial-gradient(circle at 50% 0%, #dbeafe 0%, #f8fafc 55%);
  background-attachment: fixed;
}
a { color: inherit; text-decoration: none; }
img, svg { display: block; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; background: none; border: none; padding: 0; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
::-webkit-scrollbar { width: 3px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-h); border-radius: 99px; }


/* ── SCROLL PROGRESS ── */
#scroll-progress {
  position: fixed; top: 0; left: 0; height: 2px; width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  z-index: 10000; transition: width 0.1s linear;
  box-shadow: 0 0 8px rgba(79,140,255,0.5);
}

/* ── NAVBAR ── */
.navbar {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--nav);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 2rem;
  background: rgba(2,6,23,0.7);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  z-index: 900;
  transition: background var(--t2), border-color var(--t2);
}
.navbar.scrolled {
  background: rgba(2,6,23,0.92);
  border-color: var(--border-h);
}
[data-theme="light"] .navbar { background: rgba(248,250,252,0.8); border-color: var(--border); }
[data-theme="light"] .navbar.scrolled { background: rgba(248,250,252,0.95); }

.nav-logo {
  font-weight: 800; font-size: 1.05rem; letter-spacing: -0.03em;
  color: var(--text); transition: opacity var(--t1);
}
.nav-logo:hover { opacity: 0.75; }
.logo-dot { color: var(--accent); }

.nav-links {
  display: flex; gap: 0.25rem; align-items: center;
}
.nav-link {
  font-size: 0.85rem; font-weight: 500; color: var(--muted);
  padding: 6px 12px; border-radius: var(--r-sm);
  transition: color var(--t1), background var(--t1);
}
.nav-link:hover, .nav-link.active { color: var(--text); background: var(--border); }

.nav-actions { display: flex; align-items: center; gap: 6px; }
.btn-icon {
  width: 34px; height: 34px; border-radius: var(--r-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--muted); transition: color var(--t1), background var(--t1);
}
.btn-icon:hover { color: var(--text); background: var(--border); }

/* Hamburger */
.nav-hamburger { display: none; flex-direction: column; gap: 5px; padding: 4px; }
.nav-hamburger span {
  width: 20px; height: 2px; background: var(--muted); border-radius: 99px;
  transition: all var(--t2);
}
@media (max-width: 680px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .nav-links.open {
    display: flex; flex-direction: column; position: fixed;
    top: var(--nav); left: 0; right: 0;
    background: rgba(2,6,23,0.97);
    backdrop-filter: blur(20px);
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    gap: 4px;
  }
  .nav-link { width: 100%; text-align: left; font-size: 1rem; padding: 10px 14px; }
}


/* ── HERO ── */
.hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: var(--nav) 24px 0;
}

#particles-canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  z-index: 0; pointer-events: none;
  opacity: 0.18;
}

.hero-inner {
  position: relative; z-index: 1;
  display: flex; flex-direction: column;
  align-items: center;
  max-width: 760px;
}

.hero-name {
  font-size: clamp(3.2rem, 9vw, 7rem);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 1.0;
  margin-bottom: 1.4rem;
  background: linear-gradient(135deg, #ffffff 0%, #c7d8ff 55%, #a78bfa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0;
  animation: heroFadeUp 0.7s 0.3s var(--ease) forwards;
}
[data-theme="light"] .hero-name {
  background: none;
  -webkit-text-fill-color: #0f172a;
}

.hero-sub {
  font-size: clamp(1rem, 2.4vw, 1.2rem);
  color: var(--muted);
  line-height: 1.65;
  max-width: 520px;
  margin-bottom: 2.5rem;
  opacity: 0;
  animation: heroFadeUp 0.7s 0.55s var(--ease) forwards;
}

.hero-btns {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  opacity: 0;
  animation: heroFadeUp 0.7s 0.75s var(--ease) forwards;
}

.hero-scroll {
  position: absolute; bottom: 2rem; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center;
  opacity: 0;
  animation: heroFadeUp 0.7s 1.2s var(--ease) forwards;
  z-index: 1;
}
.scroll-line {
  width: 1px; height: 40px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollPulse 2.2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(1); }
  50%       { opacity: 1;   transform: scaleY(0.7); }
}
@keyframes heroFadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}


/* ── BUTTONS ── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 0.78rem 1.9rem;
  border-radius: var(--r);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  border: none;
  cursor: pointer;
  transition: transform var(--t1) var(--ease),
              box-shadow var(--t1) var(--ease),
              filter var(--t1);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #2563eb 0%, #4f46e5 100%);
  color: #fff !important;
  box-shadow: 0 4px 20px rgba(79,100,255,0.32),
              inset 0 1px 0 rgba(255,255,255,0.14);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(79,100,255,0.48),
              inset 0 1px 0 rgba(255,255,255,0.18);
  filter: brightness(1.07);
}
.btn-primary:active { transform: scale(0.97); }

.btn-ghost {
  background: rgba(255,255,255,0.05);
  color: var(--text) !important;
  border: 1px solid var(--border-h);
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.09);
  border-color: rgba(255,255,255,0.22);
  transform: translateY(-2px);
}
.btn-ghost:active { transform: scale(0.97); }
[data-theme="light"] .btn-ghost {
  background: rgba(0,0,0,0.04);
  border-color: rgba(0,0,0,0.13);
  color: #0f172a !important;
}
[data-theme="light"] .btn-ghost:hover { background: rgba(0,0,0,0.08); }


/* ── SECTIONS ── */
.section-pad { padding: 6rem 0; }
.container { max-width: 1080px; margin: 0 auto; padding: 0 2rem; }

.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.6rem;
  color: var(--text);
}
.section-lead {
  font-size: 0.95rem;
  color: var(--muted);
  margin-bottom: 2.5rem;
  max-width: 540px;
}

/* Reveal */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--t3) var(--ease), transform var(--t3) var(--ease);
}
.reveal.visible { opacity: 1; transform: translateY(0); }


/* ── ABOUT ── */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2.5rem;
  align-items: start;
}
@media (max-width: 820px) { .about-grid { grid-template-columns: 1fr; } }

.terminal-box {
  background: #060c18;
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
  box-shadow: 0 0 40px rgba(0,0,0,0.4);
  transition: border-color var(--t2);
}
.terminal-box:hover { border-color: rgba(79,140,255,0.18); }
.terminal-header {
  display: flex; align-items: center; gap: 6px;
  padding: 10px 14px;
  background: rgba(255,255,255,0.02);
  border-bottom: 1px solid var(--border);
}
.terminal-dots { display: flex; gap: 6px; }
.t-dot { width: 11px; height: 11px; border-radius: 50%; }
.t-dot.red    { background: #ff5f57; }
.t-dot.yellow { background: #febc2e; }
.t-dot.green  { background: #28c840; }
.terminal-label { font-family: var(--mono); font-size: 0.72rem; color: var(--sub); margin-left: 8px; flex: 1; }
.terminal-status { font-family: var(--mono); font-size: 0.68rem; color: #28c840; opacity: 0.8; }
.terminal-body {
  padding: 1.2rem 1.4rem;
  font-family: var(--mono); font-size: 0.8rem; line-height: 1.9;
  min-height: 220px; max-height: 320px; overflow-y: auto;
  color: #e2e8f0;
}
.t-line   { display: flex; gap: 8px; }
.t-output { display: flex; gap: 10px; }
.t-prompt-green { color: #28c840; flex-shrink: 0; }
.t-cmd    { color: #e2e8f0; }
.t-key    { color: #60a5fa; flex-shrink: 0; min-width: 70px; }
.t-val    { color: #c4b5fd; }
.t-info   { color: #94a3b8; }
.t-list   { color: #e2e8f0; margin-left: 6px; }
.t-err    { color: #f87171; }
.terminal-input-row {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 14px;
  border-top: 1px solid var(--border);
  background: rgba(255,255,255,0.015);
}
.ti-prompt { font-family: var(--mono); color: #28c840; font-size: 0.85rem; }
.terminal-live-input {
  flex: 1; background: none; border: none; outline: none;
  font-family: var(--mono); font-size: 0.82rem;
  color: #e2e8f0; caret-color: var(--accent);
}
.terminal-live-input::placeholder { color: var(--sub); }

.about-info { display: flex; flex-direction: column; gap: 1rem; }
.about-desc { font-size: 0.95rem; color: var(--muted); line-height: 1.75; }
.about-desc strong { color: var(--text); font-weight: 600; }
.about-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 0.5rem; }
.chip {
  font-size: 0.78rem; font-weight: 500;
  padding: 5px 12px; border-radius: 99px;
  background: rgba(79,140,255,0.1);
  color: #93c5fd;
  border: 1px solid rgba(79,140,255,0.2);
}
[data-theme="light"] .chip { background: #dbeafe; color: #1d4ed8; border-color: #bfdbfe; }


/* ── SKILLS ── */
.skill-group { margin-bottom: 2.5rem; }
.skill-group-label {
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--sub);
  margin-bottom: 1rem;
}
.learning-label { color: var(--accent); }
.skills-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; }
.skill-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 1.1rem 1.2rem;
  display: flex; flex-direction: column; gap: 4px;
  transition: border-color var(--t2), transform var(--t2), box-shadow var(--t2);
}
.skill-card:hover {
  border-color: var(--border-h);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.25);
}
.skill-card--active {
  border-color: rgba(79,140,255,0.2);
  background: linear-gradient(135deg, rgba(79,140,255,0.05) 0%, var(--bg-card) 100%);
}
.skill-name { font-size: 0.92rem; font-weight: 600; color: var(--text); }
.skill-level { font-size: 0.75rem; color: var(--sub); }
.skill-badge {
  font-size: 0.65rem; font-weight: 600; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--accent);
  margin-bottom: 4px;
}


/* ── PROJECTS ── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.project-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 1.6rem;
  display: flex; flex-direction: column; gap: 12px;
  overflow: hidden;
  transition: border-color var(--t2), transform var(--t2), box-shadow var(--t2);
  cursor: default;
}
.project-card:hover {
  border-color: var(--border-h);
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.3);
}
.project-card--dim { opacity: 0.7; }

.project-card-glow {
  position: absolute; inset: -1px;
  background: radial-gradient(400px circle at var(--mouse-x, 50%) var(--mouse-y, 0%), rgba(79,140,255,0.06), transparent 60%);
  pointer-events: none; z-index: 0; border-radius: inherit;
  opacity: 0; transition: opacity var(--t2);
}
.project-card:hover .project-card-glow { opacity: 1; }

.project-header {
  display: flex; align-items: center; justify-content: space-between;
  position: relative; z-index: 1;
}
.project-tag {
  font-size: 0.72rem; font-weight: 600; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--accent);
  background: rgba(79,140,255,0.1); border: 1px solid rgba(79,140,255,0.18);
  padding: 3px 10px; border-radius: 99px;
}
.tag--ai   { color: #a78bfa; background: rgba(167,139,250,0.1); border-color: rgba(167,139,250,0.2); }
.tag--game { color: #34d399; background: rgba(52,211,153,0.1);  border-color: rgba(52,211,153,0.2); }
.project-status { font-size: 0.85rem; }

.project-title {
  font-size: 1.05rem; font-weight: 700;
  color: var(--text); letter-spacing: -0.02em;
  position: relative; z-index: 1;
}
.project-desc-short {
  font-size: 0.86rem; color: var(--muted); line-height: 1.65;
  position: relative; z-index: 1;
  flex: 1;
}
.project-tech {
  display: flex; flex-wrap: wrap; gap: 6px;
  position: relative; z-index: 1;
}
.project-tech span {
  font-size: 0.72rem; font-family: var(--mono);
  color: var(--sub);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  padding: 2px 9px; border-radius: 4px;
}
.project-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.8rem; font-weight: 500;
  color: var(--accent);
  position: relative; z-index: 1;
  transition: gap var(--t1);
}
.project-link:hover { gap: 9px; }
.project-planned {
  font-size: 0.78rem; font-weight: 500;
  color: var(--sub); letter-spacing: 0.06em;
}


/* ── TIMELINE ── */
.timeline { position: relative; padding: 1rem 0; }
.timeline::before {
  content: ''; position: absolute; left: 50%; top: 0; bottom: 0;
  width: 1px; background: var(--border);
  transform: translateX(-50%);
}
@media (max-width: 640px) {
  .timeline::before { left: 16px; }
}

.tl-item {
  position: relative;
  width: calc(50% - 28px);
  margin-bottom: 2.5rem;
  opacity: 0; transform: translateY(16px);
  transition: opacity var(--t3) var(--ease), transform var(--t3) var(--ease);
}
.tl-item.visible { opacity: 1; transform: translateY(0); }

.tl-left  { margin-left: 0; }
.tl-right { margin-left: calc(50% + 28px); }

.tl-dot {
  position: absolute;
  width: 10px; height: 10px;
  background: var(--border-h);
  border: 2px solid var(--bg);
  border-radius: 50%;
  top: 6px;
}
.tl-left  .tl-dot { right: -33px; }
.tl-right .tl-dot { left: -33px; }
.tl-dot--now {
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(79,140,255,0.2);
}

.tl-content { padding: 0; }
.tl-content--now .tl-title { color: var(--accent); }
.tl-date { font-family: var(--mono); font-size: 0.72rem; color: var(--sub); display: block; margin-bottom: 4px; }
.tl-title { font-size: 0.98rem; font-weight: 700; color: var(--text); margin-bottom: 6px; }
.tl-desc  { font-size: 0.85rem; color: var(--muted); line-height: 1.65; }

@media (max-width: 640px) {
  .tl-item { width: calc(100% - 40px); margin-left: 40px !important; }
  .tl-left .tl-dot, .tl-right .tl-dot { left: -32px; right: auto; }
  .timeline::before { left: 16px; }
}


/* ── CONTACT ── */
.contact-container { max-width: 640px; }
.contact-links { display: flex; flex-direction: column; gap: 10px; }
.contact-card {
  display: flex; align-items: center; gap: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 1.1rem 1.4rem;
  transition: border-color var(--t2), transform var(--t2), box-shadow var(--t2);
  cursor: pointer; text-align: left; width: 100%;
  color: inherit;
}
.contact-card:hover {
  border-color: var(--border-h);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}
.contact-icon { width: 20px; height: 20px; color: var(--muted); flex-shrink: 0; }
.contact-icon svg { width: 100%; height: 100%; }
.contact-info { flex: 1; display: flex; flex-direction: column; gap: 2px; }
.contact-label { font-size: 0.78rem; font-weight: 600; color: var(--text); }
.contact-value { font-size: 0.82rem; color: var(--muted); }
.contact-arrow { width: 16px; height: 16px; color: var(--sub); flex-shrink: 0; transition: transform var(--t1); }
.contact-card:hover .contact-arrow { transform: translateX(4px); }
.copy-hint { font-size: 0.75rem; color: var(--sub); white-space: nowrap; }


/* ── FOOTER ── */
.footer {
  text-align: center;
  padding: 3rem 2rem;
  font-size: 0.8rem;
  color: var(--sub);
  border-top: 1px solid var(--border);
  margin-top: 4rem;
}


/* ── SEARCH MODAL ── */
.terminal-overlay {
  position: fixed; inset: 0; z-index: 9999;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center;
  padding: 1rem;
}
.terminal-overlay.hidden { display: none; }
.terminal-search-box {
  background: #080f1e;
  border: 1px solid var(--border-h);
  border-radius: var(--r);
  width: 100%; max-width: 500px;
  box-shadow: 0 24px 64px rgba(0,0,0,0.6);
}
.ts-header {
  display: flex; align-items: center; gap: 6px;
  padding: 10px 14px; border-bottom: 1px solid var(--border);
}
.ts-dot { width: 10px; height: 10px; border-radius: 50%; }
.ts-dot.red    { background: #ff5f57; }
.ts-dot.yellow { background: #febc2e; }
.ts-dot.green  { background: #28c840; }
.ts-title { font-family: var(--mono); font-size: 0.72rem; color: var(--sub); margin-left: 8px; flex: 1; }
.ts-close { font-size: 0.9rem; color: var(--sub); transition: color var(--t1); }
.ts-close:hover { color: var(--text); }
.ts-body { display: flex; align-items: center; gap: 8px; padding: 12px 14px; }
.ts-prompt { font-family: var(--mono); color: #28c840; }
.ts-input {
  flex: 1; background: none; border: none; outline: none;
  font-family: var(--mono); font-size: 0.9rem; color: #e2e8f0;
  caret-color: var(--accent);
}
.ts-results { padding: 8px 0; max-height: 280px; overflow-y: auto; }
.ts-result-item {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 16px; font-size: 0.88rem; color: var(--muted);
  cursor: pointer; transition: background var(--t1), color var(--t1);
}
.ts-result-item:hover, .ts-result-item.active {
  background: rgba(79,140,255,0.08); color: var(--text);
}


/* ── GLOBAL TOOLTIP ── */
.global-tooltip {
  position: fixed; z-index: 99999;
  background: var(--text); color: var(--bg);
  font-family: var(--mono); font-size: 11px; font-weight: 600;
  padding: 4px 9px; border-radius: 5px;
  pointer-events: none; opacity: 0;
  transform: translate(-50%, -130%);
  transition: opacity 0.12s;
  white-space: nowrap;
}
.global-tooltip.active { opacity: 1; }