/* ==========================================================================
   Reset & base
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body, h1, h2, h3, h4, p, ul, ol, figure, blockquote {
  margin: 0;
  padding: 0;
}

ul, ol { list-style: none; }

img, svg { max-width: 100%; display: block; }

button, input, textarea, select { font: inherit; color: inherit; }

a { color: inherit; text-decoration: none; }

:root {
  --bg: #0b1120;
  --bg-soft: #0f172a;
  --surface: #111c2e;
  --surface-2: #16233a;
  --border: #1e2d45;
  --border-strong: #2a3d5c;
  --text: #e6edf7;
  --muted: #94a3b8;
  --accent: #22d3ee;
  --accent-strong: #06b6d4;
  --accent-soft: rgba(34, 211, 238, 0.12);
  --danger: #f87171;
  --shadow: 0 18px 40px -22px rgba(0, 0, 0, 0.85);
  --radius: 14px;
  --radius-sm: 9px;
  --maxw: 1100px;
  --header-h: 64px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
          Arial, "Noto Sans", sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
          "Liberation Mono", monospace;
}

[data-theme="light"] {
  --bg: #f6f8fb;
  --bg-soft: #ffffff;
  --surface: #ffffff;
  --surface-2: #f1f5f9;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --text: #0f172a;
  --muted: #64748b;
  --accent: #0891b2;
  --accent-strong: #0e7490;
  --accent-soft: rgba(8, 145, 178, 0.10);
  --danger: #dc2626;
  --shadow: 0 18px 40px -24px rgba(15, 23, 42, 0.25);
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background-color .25s ease, color .25s ease;
}

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 24px;
}

.narrow { max-width: 720px; }

.muted { color: var(--muted); }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #06202a;
  padding: 10px 16px;
  border-radius: 0 0 var(--radius-sm) 0;
  z-index: 200;
  font-weight: 600;
}
.skip-link:focus { left: 0; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ==========================================================================
   Progress bar (top of page)
   ========================================================================== */

#progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-strong));
  transform: scaleX(0);
  transform-origin: 0 50%;
  z-index: 120;
  will-change: transform;
  pointer-events: none;
}

/* ==========================================================================
   Header
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.monogram {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #06202a;
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 0.02em;
  box-shadow: 0 6px 18px -8px var(--accent);
}

.brand-name { font-size: 15px; }

.site-nav {
  display: flex;
  gap: 26px;
  font-size: 14px;
  font-weight: 500;
}
.site-nav a {
  color: var(--muted);
  transition: color .18s ease;
  position: relative;
}
.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform .22s ease;
}
.site-nav a:hover { color: var(--text); }
.site-nav a:hover::after { transform: scaleX(1); }

.theme-toggle {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: border-color .18s ease, background-color .18s ease, transform .18s ease;
}
.theme-toggle:hover { border-color: var(--accent); transform: translateY(-1px); }
.theme-toggle .icon-moon { display: none; }
[data-theme="light"] .theme-toggle .icon-sun { display: none; }
[data-theme="light"] .theme-toggle .icon-moon { display: block; }

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  position: relative;
  padding: 110px 0 90px;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -40% -20% auto -20%;
  height: 620px;
  background:
    radial-gradient(60% 60% at 25% 30%, var(--accent-soft), transparent 70%),
    radial-gradient(50% 50% at 80% 20%, rgba(99, 102, 241, 0.14), transparent 70%);
  filter: blur(6px);
  pointer-events: none;
  z-index: 0;
}

.hero-inner { position: relative; z-index: 1; max-width: 800px; }

.eyebrow {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  padding: 6px 12px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: var(--accent-soft);
  margin-bottom: 22px;
}

.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-weight: 800;
  margin-bottom: 18px;
  background: linear-gradient(180deg, var(--text), color-mix(in srgb, var(--text) 60%, var(--muted)));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.lead {
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  color: var(--muted);
  max-width: 62ch;
  margin-bottom: 30px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 30px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  font-size: 13.5px;
  color: var(--muted);
  font-family: var(--mono);
}
.hero-meta a { color: var(--accent); border-bottom: 1px dashed transparent; }
.hero-meta a:hover { border-bottom-color: var(--accent); }

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform .16s ease, background-color .18s ease,
              border-color .18s ease, color .18s ease, box-shadow .18s ease;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #06202a;
  box-shadow: 0 10px 24px -14px var(--accent);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 28px -14px var(--accent); }
.btn-primary:active { transform: translateY(0); }
.btn-primary[disabled] { opacity: .6; cursor: not-allowed; transform: none; }

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

.btn-danger {
  background: transparent;
  border-color: color-mix(in srgb, var(--danger) 55%, transparent);
  color: var(--danger);
}
.btn-danger:hover { background: color-mix(in srgb, var(--danger) 14%, transparent); }

.btn-sm { padding: 7px 12px; font-size: 13px; }

/* ==========================================================================
   Sections
   ========================================================================== */

.section { padding: 84px 0; }

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  letter-spacing: -0.02em;
  font-weight: 700;
  margin-bottom: 10px;
}

.section-title::after {
  content: "";
  display: block;
  width: 46px;
  height: 3px;
  margin-top: 12px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

.section-sub {
  color: var(--muted);
  margin: 16px 0 40px;
  max-width: 62ch;
}

/* About */

.about-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 44px;
  margin-top: 34px;
}

.about-copy p + p { margin-top: 14px; }
.about-copy p { color: color-mix(in srgb, var(--text) 88%, var(--muted)); }

.skills {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.skills h3 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 16px;
  font-family: var(--mono);
}
.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.chip-list li {
  font-size: 12.5px;
  padding: 5px 11px;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--mono);
}

/* ==========================================================================
   Project grid
   ========================================================================== */

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 22px;
  margin-top: 34px;
}

.loading, .empty-state {
  grid-column: 1 / -1;
  color: var(--muted);
  text-align: center;
  padding: 40px 0;
  font-family: var(--mono);
  font-size: 14px;
}

.project-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 24px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
}

.project-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(140deg, var(--accent), transparent 40%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity .25s ease;
  pointer-events: none;
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: 0 26px 50px -28px rgba(0, 0, 0, .75);
}
.project-card:hover::before { opacity: 1; }

.project-card h3 {
  font-size: 1.12rem;
  letter-spacing: -0.01em;
  font-weight: 700;
}

.project-card p.project-summary {
  color: var(--muted);
  font-size: 14.5px;
}

.project-highlights {
  display: grid;
  gap: 8px;
  font-size: 14px;
}
.project-highlights li {
  position: relative;
  padding-left: 20px;
  color: color-mix(in srgb, var(--text) 82%, var(--muted));
}
.project-highlights li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.project-tags span {
  font-size: 11.5px;
  font-family: var(--mono);
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--muted);
}

.project-links {
  display: flex;
  gap: 14px;
  margin-top: auto;
  padding-top: 6px;
  font-size: 13.5px;
  font-weight: 600;
}
.project-links a {
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap .18s ease;
}
.project-links a:hover { gap: 9px; }
.project-links a::after { content: "→"; }

/* ==========================================================================
   Contact form
   ========================================================================== */

.contact-form {
  display: grid;
  gap: 18px;
  margin-top: 30px;
}

.field { display: grid; gap: 6px; font-size: 13.5px; }
.field > span {
  color: var(--muted);
  font-weight: 600;
  letter-spacing: 0.02em;
}
.field > span em { font-style: normal; font-weight: 400; opacity: .7; }

.field input,
.field textarea {
  width: 100%;
  padding: 11px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 14.5px;
  font-family: var(--font);
  transition: border-color .18s ease, box-shadow .18s ease;
}
.field textarea { resize: vertical; min-height: 90px; font-family: var(--font); }
.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.field input::placeholder,
.field textarea::placeholder { color: color-mix(in srgb, var(--muted) 70%, transparent); }

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.hp-field {
  position: absolute !important;
  left: -9999px !important;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-status {
  min-height: 1.2em;
  font-size: 13.5px;
  color: var(--muted);
}
.form-status.is-error { color: var(--danger); }
.form-status.is-success { color: var(--accent); }

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  margin-top: 40px;
  font-size: 13px;
  color: var(--muted);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: space-between;
  align-items: center;
}
.views { font-family: var(--mono); font-size: 12.5px; }

/* ==========================================================================
   Scroll reveal
   ========================================================================== */

[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .6s cubic-bezier(.2,.7,.2,1), transform .6s cubic-bezier(.2,.7,.2,1);
  will-change: opacity, transform;
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .001ms !important; animation-duration: .001ms !important; }
  [data-reveal] { opacity: 1; transform: none; }
}

/* ==========================================================================
   Admin
   ========================================================================== */

.admin-body { min-height: 100vh; }

/* Login */

.login-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 40px 20px;
}
.login-card {
  width: 100%;
  max-width: 380px;
  display: grid;
  gap: 16px;
  padding: 32px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.login-card h1 { font-size: 1.35rem; letter-spacing: -0.01em; }
.login-card p.muted { font-size: 14px; margin-top: -6px; }
.login-card .btn { width: 100%; }

/* Dashboard */

.admin-wrap { min-height: 100vh; padding-bottom: 60px; }

.admin-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg-soft);
  padding: 22px 0;
  margin-bottom: 28px;
}
.admin-header-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
  align-items: center;
}
.admin-header h1 { font-size: 1.4rem; letter-spacing: -0.01em; }
.admin-header p { font-size: 13.5px; margin-top: 4px; }
.admin-header-actions { display: flex; gap: 10px; flex-wrap: wrap; }

.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}
.tab {
  background: transparent;
  border: none;
  padding: 11px 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color .18s ease, border-color .18s ease;
}
.tab:hover { color: var(--text); }
.tab.is-active { color: var(--accent); border-bottom-color: var(--accent); }

.badge {
  display: inline-block;
  min-width: 20px;
  padding: 1px 7px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 700;
  background: var(--accent);
  color: #06202a;
  margin-left: 6px;
  text-align: center;
}

.panel-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.panel-actions h2 { font-size: 1.15rem; letter-spacing: -0.01em; }

.project-form {
  display: grid;
  gap: 16px;
  padding: 24px;
  margin-bottom: 28px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.project-form h3 { font-size: 1.05rem; letter-spacing: -0.01em; }
.form-actions { display: flex; gap: 10px; flex-wrap: wrap; }

.admin-list { display: grid; gap: 14px; }

.admin-item {
  padding: 18px 20px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  display: grid;
  gap: 10px;
}
.admin-item-header {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: flex-start;
  flex-wrap: wrap;
}
.admin-item h4 { font-size: 1rem; letter-spacing: -0.005em; }
.admin-item p { font-size: 14px; color: var(--muted); }
.admin-item-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.admin-item-meta {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.admin-item pre {
  font-family: var(--font);
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 14px;
  color: color-mix(in srgb, var(--text) 88%, var(--muted));
  background: var(--surface-2);
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 860px) {
  .about-grid { grid-template-columns: 1fr; gap: 30px; }
  .site-nav { gap: 18px; }
}

@media (max-width: 640px) {
  .wrap { padding-inline: 18px; }
  .hero { padding: 72px 0 60px; }
  .section { padding: 62px 0; }
  .brand-name { display: none; }
  .site-nav { gap: 14px; font-size: 13px; }
  .field-row { grid-template-columns: 1fr; }
  .hero-actions .btn { flex: 1 1 auto; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .login-card { padding: 24px; }
}

@media (max-width: 420px) {
  .site-nav a:nth-child(1) { display: none; }
}