/* site.css — layout, theming surfaces, reveal animations for Lucian Dogaru site */

* { box-sizing: border-box; }

:root {
  /* accent is overridable by the Tweaks panel */
  --accent: var(--color-indigo-600);
  --accent-hover: color-mix(in srgb, var(--accent) 82%, #000);
  --accent-soft: color-mix(in srgb, var(--accent) 10%, transparent);
  --accent-faint: color-mix(in srgb, var(--accent) 5%, transparent);

  /* light theme surfaces */
  --surface-0: #FFFFFF;
  --surface-1: var(--color-slate-50);
  --surface-2: #FFFFFF;
  --ink: #0B1120;
  --ink-soft: var(--color-slate-600);
  --ink-muted: var(--color-slate-400);
  --hairline: var(--color-slate-200);
  --hairline-soft: var(--color-slate-100);
  --nav-bg: rgba(255, 255, 255, 0.82);
}

[data-theme="dark"] {
  --surface-0: #0B1120;
  --surface-1: #0F172A;
  --surface-2: #131C30;
  --ink: #F8FAFC;
  --ink-soft: var(--color-slate-300);
  --ink-muted: var(--color-slate-400);
  --hairline: #1E293B;
  --hairline-soft: #18233b;
  --nav-bg: rgba(11, 17, 32, 0.82);
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--surface-0);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  transition: background 0.4s ease, color 0.4s ease;
}

::selection { background: var(--accent); color: #fff; }

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 32px;
  width: 100%;
}

.section { padding: 96px 0; position: relative; }
@media (max-width: 760px) { .section { padding: 64px 0; } }

.eyebrow {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin: 0 0 16px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--accent);
  display: inline-block;
}

.section-title {
  font-size: clamp(26px, 3.2vw, 38px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0;
  max-width: 18ch;
  text-wrap: balance;
}

.lead {
  font-size: 18px;
  line-height: 1.7;
  color: var(--ink-soft);
}

a { color: inherit; }

/* buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 13px 24px;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.35s var(--easing-bounce);
  white-space: nowrap;
}
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 10px 24px -8px var(--accent); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--hairline); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.btn .icon-arrow { transition: transform 0.3s ease; }
.btn:hover .icon-arrow { transform: translateX(3px); }

/* reveal-on-scroll */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: var(--reveal-delay, 0ms);
}
.reveal.is-visible { opacity: 1; transform: none; }
.reveal.no-anim { transition: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* generic card */
.card {
  background: var(--surface-2);
  border: 1px solid var(--hairline-soft);
  border-radius: var(--radius-lg);
  transition: transform 0.35s var(--easing-bounce), box-shadow 0.3s ease, border-color 0.3s ease;
}
.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-soft);
}

.icon-badge {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  color: var(--accent);
  flex-shrink: 0;
}

/* skill chip */
.chip {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-soft);
  padding: 7px 13px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-full);
  background: var(--surface-0);
  transition: all 0.25s ease;
}
.chip:hover { border-color: var(--accent); color: var(--accent); }

/* nav link underline */
.nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 6px 2px;
  transition: color 0.25s ease;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-sans);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 2px;
  background: var(--accent);
  transition: width 0.3s ease;
}
.nav-link:hover { color: var(--ink); }
.nav-link.active { color: var(--accent); }
.nav-link.active::after { width: 100%; }

.icon-btn {
  width: 40px; height: 40px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--radius-md);
  border: 1px solid var(--hairline);
  background: var(--surface-0);
  color: var(--ink-soft);
  cursor: pointer;
  transition: all 0.25s ease;
}
.icon-btn:hover { border-color: var(--accent); color: var(--accent); }

/* lang switch */
.lang-switch {
  display: inline-flex;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-full);
  overflow: hidden;
  font-size: 13px;
  font-weight: 700;
}
.lang-switch button {
  border: none; background: transparent; cursor: pointer;
  padding: 7px 12px; color: var(--ink-muted);
  font-family: var(--font-sans); font-weight: 700; letter-spacing: 0.03em;
  transition: all 0.2s ease;
}
.lang-switch button.active { background: var(--accent); color: #fff; }

/* utility */
.mono { font-family: 'Courier New', monospace; }

/* contact rows (footer) */
.contact-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: all 0.3s ease;
}
.contact-row:hover { border-color: var(--accent); background: rgba(255, 255, 255, 0.04); transform: translateX(4px); }
.contact-ico {
  width: 44px; height: 44px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-md);
  background: var(--accent-soft); color: var(--color-indigo-300);
}
.contact-k { font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-slate-400); font-weight: 700; }
.contact-v { font-size: 16px; font-weight: 700; color: #fff; margin-top: 2px; }

/* project card hover */
.project-card:hover .proj-arrow { color: var(--accent); transform: translate(3px, -3px); }

/* ---- two-column grids (made responsive below) ---- */
.hero-grid { display: grid; align-items: center; gap: 60px; }
.hero-grid-classic { grid-template-columns: 1.05fr 0.95fr; }
.hero-grid-bold { grid-template-columns: 1.15fr 0.85fr; gap: 48px; }
.about-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 64px; align-items: center; }
.footer-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: center; }

/* ---- tablet ---- */
@media (max-width: 1024px) {
  .container { max-width: 920px; }
  .hero-grid, .about-grid, .footer-grid { gap: 44px; }
  .hero-grid-bold { gap: 40px; }
}

/* ---- stack point: portrait tablet & phone ---- */
@media (max-width: 900px) {
  .hero-grid-classic, .hero-grid-bold { grid-template-columns: 1fr; gap: 40px; }
  .hero-grid .hero-photo { order: -1; }           /* photo above text when stacked */
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero-badge { left: 6px !important; }
}

/* ---- phone ---- */
@media (max-width: 560px) {
  .section { padding: 56px 0; }
  .btn { width: 100%; justify-content: center; }
  .lead { font-size: 16.5px; }
  .contact-row { padding: 14px 16px; }
}

@media (max-width: 860px) {
  .container { padding: 0 22px; }
  .desktop-only { display: none !important; }
}
@media (min-width: 861px) {
  .mobile-only { display: none !important; }
}

/* ================================================================
   NAV SCROLL STATE
   ================================================================ */
#site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease;
}
#site-header.scrolled { border-bottom-color: var(--hairline); }

/* lang switch as links (not just buttons) */
.lang-switch a {
  display: inline-block;
  border: none;
  background: transparent;
  cursor: pointer;
  color: var(--ink-muted);
  font-family: var(--font-sans);
  font-weight: 700;
  letter-spacing: 0.03em;
  font-size: 13px;
  transition: all 0.2s ease;
  text-decoration: none;
}
.lang-switch a.active { background: var(--accent); color: #fff; }

/* ================================================================
   CONTACT FORM (dark footer context)
   ================================================================ */
.form-group { margin-bottom: 20px; }

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-slate-300);
  margin-bottom: 7px;
  letter-spacing: 0.01em;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 13px 16px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.5;
  outline: none;
  transition: border-color 0.2s ease, background 0.2s ease;
  box-sizing: border-box;
}
.form-input:focus,
.form-textarea:focus {
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.1);
}
.form-input::placeholder,
.form-textarea::placeholder { color: rgba(255, 255, 255, 0.35); }
.form-input.is-invalid,
.form-textarea.is-invalid { border-color: #f87171; }

.form-textarea { min-height: 130px; resize: vertical; }

.form-error {
  font-size: 13px;
  color: #f87171;
  margin: 5px 0 0;
}

/* ================================================================
   ALERTS
   ================================================================ */
.alert {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
}
.alert-success {
  background: rgba(3, 168, 124, 0.15);
  border: 1px solid rgba(3, 168, 124, 0.35);
  color: #34d399;
}
.alert-error {
  background: rgba(204, 84, 84, 0.15);
  border: 1px solid rgba(204, 84, 84, 0.35);
  color: #f87171;
}