/* ==============================================
   PORTFOLIO — STATIC SITE CSS
   Black & White | Dark/Light Toggle
   JetBrains Mono + Syne Display
   ============================================== */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&family=Syne:wght@400;600;700;800&display=swap');

/* ── TOKENS ── */
:root {
  --bg:          #080808;
  --bg2:         #101010;
  --bg3:         #181818;
  --surface:     #1c1c1c;
  --border:      #252525;
  --border2:     #333333;
  --text:        #ececec;
  --text2:       #909090;
  --text3:       #555555;
  --accent:      #ffffff;
  --accent-dim:  rgba(255,255,255,0.06);
  --accent-mid:  rgba(255,255,255,0.10);
  --green:       #4ade80;
  --mono:        'JetBrains Mono', 'Fira Code', monospace;
  --display:     'Syne', sans-serif;
  --ease:        cubic-bezier(0.16, 1, 0.3, 1);
  --fast:        0.15s;
  --mid:         0.25s;
  --slow:        0.4s;
  --radius:      5px;
  --radius-lg:   10px;
  --radius-xl:   16px;
  --shadow:      0 1px 3px rgba(0,0,0,0.4), 0 4px 16px rgba(0,0,0,0.3);
  --shadow-lg:   0 8px 40px rgba(0,0,0,0.6);
}

[data-theme="light"] {
  --bg:          #f7f7f5;
  --bg2:         #eeeeeb;
  --bg3:         #e4e4e0;
  --surface:     #ffffff;
  --border:      #d8d8d4;
  --border2:     #c4c4c0;
  --text:        #0e0e0e;
  --text2:       #5a5a5a;
  --text3:       #999999;
  --accent:      #0e0e0e;
  --accent-dim:  rgba(0,0,0,0.05);
  --accent-mid:  rgba(0,0,0,0.09);
  --shadow:      0 1px 3px rgba(0,0,0,0.08), 0 4px 16px rgba(0,0,0,0.06);
  --shadow-lg:   0 8px 40px rgba(0,0,0,0.12);
}

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--mono);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background var(--mid), color var(--mid);
  overflow-x: hidden;
}

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }

/* ── TYPOGRAPHY ── */
h1, h2, h3, h4 { font-family: var(--display); line-height: 1.15; color: var(--text); }
h1 { font-size: clamp(2.8rem, 7vw, 5.5rem); font-weight: 800; letter-spacing: -0.03em; }
h2 { font-size: clamp(2rem, 4.5vw, 3.2rem); font-weight: 700; letter-spacing: -0.02em; }
h3 { font-size: 1.25rem; font-weight: 700; }
p  { color: var(--text2); line-height: 1.7; }
a  { color: var(--text); text-decoration: none; transition: color var(--fast); }
a:hover { color: var(--accent); }

/* ── LAYOUT ── */
main { flex: 1; padding-top: 64px; }
.container { max-width: 1160px; margin: 0 auto; padding: 0 2rem; }
.section { padding: 6rem 0; }

/* ── NAVBAR ── */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: 64px; display: flex; align-items: center;
  padding: 0 2rem; gap: 2rem;
  background: rgba(8,8,8,0.85);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  transition: background var(--mid), border-color var(--mid);
}

[data-theme="light"] .navbar {
  background: rgba(247,247,245,0.88);
}

.nav-logo {
  font-family: var(--mono); font-weight: 700; font-size: 1rem;
  color: var(--text); white-space: nowrap; letter-spacing: -0.02em;
  display: flex; align-items: center; gap: 0;
}
.nav-logo .bracket { color: var(--text3); }
.nav-logo .name { color: var(--text); }

.nav-links {
  display: flex; list-style: none; gap: 0;
  margin-left: auto;
}
.nav-links a {
  padding: 0.4rem 0.85rem;
  font-size: 0.8rem; font-weight: 500;
  color: var(--text2); border-radius: var(--radius);
  transition: all var(--fast); position: relative;
}
.nav-links a:hover { color: var(--text); background: var(--accent-dim); }
.nav-links a.active { color: var(--text); }
.nav-links a.active::after {
  content: '';
  position: absolute; bottom: 4px; left: 50%; transform: translateX(-50%);
  width: 4px; height: 4px; border-radius: 50%;
  background: var(--text);
}

.nav-right { display: flex; align-items: center; gap: 0.5rem; }

.theme-btn {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  background: none; border: 1px solid var(--border); border-radius: var(--radius);
  color: var(--text2); cursor: pointer;
  transition: all var(--fast);
}
.theme-btn:hover { color: var(--text); background: var(--accent-dim); border-color: var(--border2); }
.theme-btn svg { width: 15px; height: 15px; }
[data-theme="dark"]  .icon-sun  { display: block; }
[data-theme="dark"]  .icon-moon { display: none; }
[data-theme="light"] .icon-sun  { display: none; }
[data-theme="light"] .icon-moon { display: block; }

.nav-cta {
  padding: 0.4rem 1rem;
  background: var(--accent); color: var(--bg) !important;
  border-radius: var(--radius); font-size: 0.8rem; font-weight: 700;
  transition: opacity var(--fast);
}
.nav-cta:hover { opacity: 0.85; background: var(--accent); }

.hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.hamburger span { display: block; width: 20px; height: 1.5px; background: var(--text); transition: all var(--mid); }

/* ── MOBILE NAV ── */
.mobile-nav {
  display: none;
  position: fixed; top: 64px; left: 0; right: 0;
  background: var(--bg2); border-bottom: 1px solid var(--border);
  padding: 1rem; flex-direction: column; gap: 0.25rem;
  z-index: 999;
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  padding: 0.6rem 1rem; border-radius: var(--radius);
  font-size: 0.85rem; color: var(--text2);
  transition: all var(--fast);
}
.mobile-nav a:hover, .mobile-nav a.active { background: var(--accent-dim); color: var(--text); }

/* ── BUTTONS ── */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.65rem 1.4rem; border-radius: var(--radius);
  font-family: var(--mono); font-size: 0.82rem; font-weight: 600;
  cursor: pointer; transition: all var(--fast);
  border: 1px solid transparent; text-decoration: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent); color: var(--bg);
  border-color: var(--accent);
}
.btn-primary:hover { opacity: 0.85; color: var(--bg); }
.btn-outline {
  background: transparent; color: var(--text);
  border-color: var(--border2);
}
.btn-outline:hover { background: var(--accent-dim); border-color: var(--text3); color: var(--text); }
.btn-sm { padding: 0.4rem 0.9rem; font-size: 0.75rem; }
.btn-ghost { background: none; border-color: transparent; color: var(--text2); }
.btn-ghost:hover { color: var(--text); background: var(--accent-dim); }

/* ── SECTION META ── */
.eyebrow {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-size: 0.72rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--text3); font-family: var(--mono); margin-bottom: 1rem;
}
.eyebrow::before {
  content: ''; display: block; width: 20px; height: 1px; background: var(--text3);
}
.section-lead { color: var(--text2); max-width: 560px; margin-top: 0.75rem; font-size: 1rem; }

/* ── HERO ── */
.hero {
  min-height: calc(100vh - 64px);
  display: flex; align-items: center;
  padding: 5rem 0 4rem;
  position: relative; overflow: hidden;
}

/* Noise texture overlay */
.hero::before {
  content: '';
  position: absolute; inset: 0; pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  opacity: 0.4;
}

.hero-inner {
  display: grid; grid-template-columns: 1fr 420px;
  gap: 5rem; align-items: center; position: relative;
}

.hero-badge {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  background: var(--surface); border: 1px solid var(--border2);
  border-radius: 2rem; font-size: 0.72rem; color: var(--text2);
  margin-bottom: 1.75rem;
}
.hero-badge-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
  animation: pulse 2s ease infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.6; transform: scale(0.85); }
}

.hero-title { margin-bottom: 1.25rem; }
.hero-sub {
  font-size: 1rem; color: var(--text2);
  max-width: 500px; margin-bottom: 2.5rem; line-height: 1.7;
}
.hero-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }

/* Code block */
.code-block {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--radius-lg); overflow: hidden;
  font-size: 0.78rem;
}
.code-block-bar {
  padding: 0.65rem 1rem; background: var(--bg3);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 0.5rem;
}
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot-r { background: #ff5f57; }
.dot-y { background: #febc2e; }
.dot-g { background: #28c840; }
.code-block-tab {
  margin-left: auto; font-size: 0.68rem; color: var(--text3);
  padding: 0.15rem 0.6rem; background: var(--bg);
  border: 1px solid var(--border); border-radius: 3px;
}
.code-block-body {
  padding: 1.4rem 1.5rem; line-height: 2.1;
  font-family: var(--mono);
}
.c-comment { color: var(--text3); }
.c-key     { color: #79c0ff; }
.c-str     { color: #a5d6ff; }
.c-val     { color: #56d364; }
.c-brace   { color: var(--text3); }
.c-num     { color: #ff9966; }

/* ── PROJECTS ── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.25rem;
}
.project-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); overflow: hidden;
  cursor: pointer;
  transition: border-color var(--fast), transform var(--mid) var(--ease), box-shadow var(--mid);
  text-decoration: none; color: inherit; display: block;
}
.project-card:hover {
  border-color: var(--border2);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  color: inherit;
}
.project-thumb {
  aspect-ratio: 16/9; background: var(--bg3);
  position: relative; overflow: hidden;
}
.project-thumb img { width: 100%; height: 100%; object-fit: cover; }
.project-thumb-placeholder {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  font-size: 3rem; color: var(--text3);
}
.project-body { padding: 1.35rem; }
.project-name { font-size: 1rem; font-weight: 700; margin-bottom: 0.5rem; }
.project-desc {
  font-size: 0.8rem; color: var(--text2); line-height: 1.5;
  margin-bottom: 1rem;
  display: -webkit-box; -webkit-line-clamp: 2;
  -webkit-box-orient: vertical; overflow: hidden;
}
.project-tags { display: flex; flex-wrap: wrap; gap: 0.35rem; margin-bottom: 1rem; }
.tag {
  font-size: 0.68rem; padding: 0.18rem 0.55rem;
  background: var(--accent-dim); border: 1px solid var(--border);
  border-radius: 2rem; color: var(--text3); font-family: var(--mono);
}
.project-footer { display: flex; gap: 0.5rem; }

/* ── SERVICES ── */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1.25rem;
}
.service-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 1.75rem;
  transition: border-color var(--fast), transform var(--mid) var(--ease);
}
.service-card:hover { border-color: var(--border2); transform: translateY(-2px); }
.service-icon { font-size: 1.75rem; margin-bottom: 1rem; }
.service-name { font-size: 0.95rem; font-weight: 700; margin-bottom: 0.4rem; }
.service-desc { font-size: 0.8rem; color: var(--text2); line-height: 1.55; }

/* ── SOCIAL PROOF ── */
.proof-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
}
.proof-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 1.75rem;
}
.proof-platform {
  font-size: 0.68rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--text3); margin-bottom: 0.6rem;
}
.proof-metric { font-size: 2.8rem; font-weight: 800; font-family: var(--display); line-height: 1; }
.proof-label { font-size: 0.8rem; color: var(--text2); margin: 0.4rem 0 0.75rem; }
.proof-desc { font-size: 0.78rem; color: var(--text2); line-height: 1.55; }

/* ── ABOUT ── */
.about-grid {
  display: grid; grid-template-columns: 360px 1fr;
  gap: 5rem; align-items: start;
}
.about-avatar {
  aspect-ratio: 1; background: var(--bg3); border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  display: flex; align-items: center; justify-content: center;
  font-size: 6rem; overflow: hidden;
}
.about-avatar img { width: 100%; height: 100%; object-fit: cover; }
.stat-row {
  display: flex; justify-content: space-between;
  font-size: 0.8rem; padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
}
.stat-row:last-child { border-bottom: none; }
.stat-lbl { color: var(--text3); }
.skills-wrap { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1.25rem; }
.skill-pill {
  padding: 0.35rem 0.8rem;
  background: var(--accent-dim); border: 1px solid var(--border);
  border-radius: var(--radius); font-size: 0.75rem; color: var(--text2);
}
.exp-item {
  display: grid; grid-template-columns: 90px 1fr;
  gap: 1.25rem; padding: 1.25rem 0;
  border-bottom: 1px solid var(--border);
}
.exp-item:last-child { border-bottom: none; }
.exp-year { font-size: 0.72rem; color: var(--text3); padding-top: 0.25rem; }
.exp-title { font-size: 0.9rem; font-weight: 700; margin-bottom: 0.25rem; }
.exp-sub { font-size: 0.78rem; color: var(--text2); }

/* ── CONTACT ── */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 5rem; align-items: start;
}
.contact-info { display: flex; flex-direction: column; gap: 1.5rem; }
.contact-row { display: flex; align-items: flex-start; gap: 1rem; }
.contact-icon {
  width: 38px; height: 38px; flex-shrink: 0;
  background: var(--accent-dim); border: 1px solid var(--border);
  border-radius: var(--radius); display: flex; align-items: center;
  justify-content: center; font-size: 1rem;
}
.contact-lbl { font-size: 0.7rem; color: var(--text3); margin-bottom: 0.2rem; letter-spacing: 0.08em; }
.contact-val { font-size: 0.85rem; }

.form { display: flex; flex-direction: column; gap: 1rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.form-label { font-size: 0.72rem; color: var(--text2); letter-spacing: 0.05em; }
.form-input, .form-textarea, .form-select {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 0.65rem 0.9rem;
  color: var(--text); font-family: var(--mono); font-size: 0.82rem;
  transition: border-color var(--fast), background var(--fast);
  width: 100%;
}
.form-input:focus, .form-textarea:focus {
  outline: none; border-color: var(--border2); background: var(--bg2);
}
.form-textarea { resize: vertical; min-height: 130px; }

/* ── FOOTER ── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 2rem;
  background: var(--bg2);
}
.footer-inner {
  max-width: 1160px; margin: 0 auto;
  display: flex; align-items: center;
  justify-content: space-between; flex-wrap: wrap; gap: 1rem;
}
.footer-copy { font-size: 0.75rem; color: var(--text3); }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a { font-size: 0.75rem; color: var(--text3); transition: color var(--fast); }
.footer-links a:hover { color: var(--text); }

/* ── ALERTS ── */
.alert {
  padding: 0.75rem 1rem; border-radius: var(--radius);
  font-size: 0.8rem; border: 1px solid; margin-bottom: 1rem;
}
.alert-success { background: rgba(74,222,128,0.08); border-color: rgba(74,222,128,0.25); color: #4ade80; }
.alert-error   { background: rgba(248,113,113,0.08); border-color: rgba(248,113,113,0.25); color: #f87171; }
.alert-info    { background: var(--accent-dim); border-color: var(--border); color: var(--text2); }

/* ── SPINNER ── */
.spinner {
  display: inline-block; width: 16px; height: 16px;
  border: 2px solid var(--border); border-top-color: var(--text);
  border-radius: 50%; animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── DIVIDER ── */
hr.divider { border: none; border-top: 1px solid var(--border); margin: 2rem 0; }

/* ── EMPTY STATE ── */
.empty { text-align: center; padding: 5rem 2rem; color: var(--text3); }
.empty-icon { font-size: 3.5rem; margin-bottom: 1rem; display: block; }

/* ── TOAST ── */
#toast-container {
  position: fixed; bottom: 1.5rem; right: 1.5rem;
  z-index: 9999; display: flex; flex-direction: column; gap: 0.5rem;
}
.toast {
  padding: 0.7rem 1.1rem; border-radius: var(--radius);
  font-size: 0.8rem; font-family: var(--mono);
  backdrop-filter: blur(12px); max-width: 300px;
  border: 1px solid;
  animation: toastIn 0.2s var(--ease);
}
.toast-success { background: rgba(74,222,128,0.1); border-color: rgba(74,222,128,0.3); color: #4ade80; }
.toast-error   { background: rgba(248,113,113,0.1); border-color: rgba(248,113,113,0.3); color: #f87171; }
.toast-info    { background: var(--surface); border-color: var(--border); color: var(--text2); }
@keyframes toastIn {
  from { opacity: 0; transform: translateX(16px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ── PAGE HEADER ── */
.page-hero {
  padding: 4rem 0 3rem;
  border-bottom: 1px solid var(--border);
}
.page-hero h1 { font-size: clamp(2rem, 5vw, 3.5rem); }

/* ── VIEWER ── */
.viewer-wrap {
  height: calc(100vh - 64px);
  display: grid;
  grid-template-columns: 220px 1fr 1fr;
  overflow: hidden;
}
.viewer-topbar {
  grid-column: 1 / -1;
  background: var(--bg3); border-bottom: 1px solid var(--border);
  padding: 0.6rem 1rem; display: flex; align-items: center; gap: 0.75rem;
  flex-shrink: 0;
}
.viewer-tree {
  background: var(--bg2); border-right: 1px solid var(--border);
  overflow-y: auto;
}
.viewer-tree-head {
  padding: 0.75rem 1rem;
  font-size: 0.65rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--text3); border-bottom: 1px solid var(--border);
}
.tree-item {
  padding: 0.3rem 1rem; font-size: 0.78rem;
  display: flex; align-items: center; gap: 0.5rem;
  color: var(--text2); cursor: pointer; white-space: nowrap;
  transition: all var(--fast); overflow: hidden; text-overflow: ellipsis;
}
.tree-item:hover { background: var(--accent-dim); color: var(--text); }
.tree-item.active { background: var(--accent-mid); color: var(--text); font-weight: 600; }
.tree-folder-lbl {
  padding: 0.3rem 1rem; font-size: 0.72rem;
  color: var(--text3); cursor: pointer; display: flex; align-items: center; gap: 0.5rem;
  transition: color var(--fast);
}
.tree-folder-lbl:hover { color: var(--text); }

.viewer-code {
  background: var(--bg); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; overflow: hidden;
}
.viewer-code-bar {
  padding: 0.55rem 1rem; background: var(--bg3);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 0.75rem; flex-shrink: 0;
}
.viewer-code-body { flex: 1; overflow: auto; padding: 1rem; }
.viewer-code-body pre { margin: 0; background: transparent !important; }
.viewer-code-body code { font-size: 0.78rem; line-height: 1.7; }
.viewer-empty {
  height: 100%; display: flex; align-items: center;
  justify-content: center; color: var(--text3); font-size: 0.82rem;
}

.viewer-preview { display: flex; flex-direction: column; overflow: hidden; }
.viewer-preview-bar {
  padding: 0.55rem 1rem; background: var(--bg3);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 0.75rem; flex-shrink: 0;
}
.viewer-url {
  flex: 1; padding: 0.28rem 0.7rem;
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--radius); font-size: 0.75rem; color: var(--text3);
  font-family: var(--mono); overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.viewer-iframe { flex: 1; border: none; background: #fff; }

/* ── RESPONSIVE ── */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; }
  .code-block { display: none; }
  .about-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 3rem; }
  .viewer-wrap { grid-template-columns: 200px 1fr; }
  .viewer-preview { display: none; }
}

@media (max-width: 640px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .nav-cta { display: none; }
  .section { padding: 4rem 0; }
  .projects-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .viewer-wrap { grid-template-columns: 1fr; }
  .viewer-tree { display: none; }
}