/* ═══════════════════════════════════════════
   Concursul de Matematică „Ștefan Musta"
   ═══════════════════════════════════════════ */

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

:root {
  --navy:       #0a1628;
  --navy-mid:   #112240;
  --navy-light: #1a3a6e;
  --gold:       #f9d100;
  --gold-soft:  #e8c547;
  --gold-pale:  #f5e7a3;
  --white:      #ffffff;
  --text:       #ccd6f6;
  --gray:       #8892a4;
  --gray-dim:   #5a6378;
  --border:     rgba(201,162,39,.15);
  --border-h:   rgba(201,162,39,.4);

  --serif:  'Cormorant Garamond', Georgia, serif;
  --sans:   'DM Sans', system-ui, sans-serif;
  --header: 70px;
}

*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header); }

body {
  font-family: var(--sans);
  background: var(--navy);
  color: var(--text);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  line-height: 1.7;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ─── UTILITY ─── */
.container { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; }

.section-tag {
  font-size: .73rem; letter-spacing: .2em; text-transform: uppercase;
  color: var(--gold); margin-bottom: .8rem;
  display: flex; align-items: center; gap: .8rem;
}
.section-tag::before {
  content: ''; width: 32px; height: 1px; background: var(--gold);
}

.section-title {
  font-family: var(--serif); font-weight: 700;
  font-size: clamp(1.8rem, 4vw, 3rem);
  color: var(--white); line-height: 1.15; margin-bottom: 1.2rem;
}
.section-title em { color: var(--gold); font-style: italic; }

.body-text {
  font-size: .98rem; line-height: 1.85; color: var(--text);
}
.body-text + .body-text { margin-top: .9rem; }

.divider {
  width: 50px; height: 2px;
  background: linear-gradient(to right, var(--gold), transparent);
  margin: 1.5rem 0;
}

/* ─── BUTTONS ─── */
.btn-primary {
  display: inline-block; background: var(--gold); color: var(--navy);
  padding: .85rem 2rem; font-family: var(--sans);
  font-weight: 600; font-size: .85rem;
  letter-spacing: .08em; text-transform: uppercase;
  border: none; cursor: pointer;
  transition: background .25s, transform .2s;
}
.btn-primary:hover { background: var(--gold-soft); transform: translateY(-2px); }

.btn-secondary {
  display: inline-block; border: 1px solid var(--gold);
  color: var(--gold); padding: .85rem 2rem;
  font-weight: 500; font-size: .85rem;
  letter-spacing: .08em; text-transform: uppercase;
  cursor: pointer; transition: all .25s;
  background: transparent; font-family: var(--sans);
}
.btn-secondary:hover { background: rgba(201,162,39,.1); }

/* ═══════════════════════════
   NAVIGATION
   ═══════════════════════════ */
.site-nav {
  position: fixed; top: 0; width: 100%; z-index: 100;
  background: rgba(10,22,40,.92);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: var(--header);
  display: flex; align-items: center;
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%;
}

/* Logo */
.nav-logo {
  font-family: var(--serif); font-size: 1.35rem; font-weight: 700;
  color: var(--gold); letter-spacing: .02em;
  display: flex; align-items: center; gap: .1em;
}
.nav-logo span { color: var(--white); }

/* Links */
.nav-links { display: flex; gap: 1.8rem; align-items: center; }
.nav-links a {
  color: var(--gray); font-size: .82rem; font-weight: 500;
  letter-spacing: .06em; text-transform: uppercase;
  transition: color .25s; padding: .4rem 0;
  -webkit-tap-highlight-color: transparent;
}
.nav-links a:hover, .nav-links a.active { color: var(--gold); }

.nav-cta {
  background: var(--gold) !important; color: var(--navy) !important;
  padding: .55rem 1.3rem !important; font-weight: 600 !important;
  letter-spacing: .06em; text-transform: uppercase; font-size: .78rem !important;
  transition: background .25s;
}
.nav-cta:hover { background: var(--gold-soft) !important; }

/* Dropdown */
.has-dropdown { position: relative; }
.dropdown {
  position: absolute; top: calc(100% + 8px); left: -12px;
  min-width: 160px; background: var(--navy-mid);
  border: 1px solid var(--border); padding: .4rem;
  opacity: 0; visibility: hidden; transform: translateY(6px);
  transition: all .25s; z-index: 99;
}
.has-dropdown:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown a {
  display: block; padding: .6rem .9rem; font-size: .8rem;
  letter-spacing: .04em;
}
.dropdown a:hover { color: var(--gold); background: rgba(255,255,255,.03); }

/* Hamburger */
.hamburger {
  display: none; flex-direction: column; gap: 5px;
  cursor: pointer; padding: 8px; background: none; border: none;
  -webkit-tap-highlight-color: transparent; z-index: 102;
}
.hamburger span {
  width: 22px; height: 2px; background: var(--gold);
  transition: .3s; display: block;
}
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* ═══════════════════════════
   HERO (index)
   ═══════════════════════════ */
.hero {
  min-height: 100svh; display: flex; align-items: center;
  position: relative; overflow: hidden;
  background:
    radial-gradient(ellipse at 80% 20%, rgba(201,162,39,.07) 0%, transparent 50%),
    radial-gradient(ellipse at 10% 80%, rgba(26,58,110,.35) 0%, transparent 60%),
    var(--navy);
}
.hero::before {
  content: 'Σ'; position: absolute; right: -1.5rem; top: 50%;
  transform: translateY(-50%);
  font-family: var(--serif);
  font-size: clamp(180px, 28vw, 380px);
  color: rgba(201,162,39,.035); line-height: 1;
  pointer-events: none;
}

.hero-content { position: relative; z-index: 1; }

.hero-eyebrow {
  font-size: .75rem; letter-spacing: .2em; text-transform: uppercase;
  color: var(--gold); margin-bottom: 1.3rem;
  display: flex; align-items: center; gap: .8rem;
}
.hero-eyebrow::before { content: ''; width: 36px; height: 1px; background: var(--gold); }

.hero h1 {
  font-family: var(--serif); font-weight: 700;
  font-size: clamp(2.4rem, 6.5vw, 5rem);
  line-height: 1.05; color: var(--white); margin-bottom: .3rem;
}
.hero h1 em { font-style: italic; color: var(--gold); }

.hero-subtitle {
  font-family: var(--serif); font-style: italic;
  font-size: clamp(1rem, 2.2vw, 1.45rem);
  color: var(--gray); margin-bottom: 2rem;
}

.hero-desc {
  font-size: 1rem; line-height: 1.8;
  color: var(--text); max-width: 550px; margin-bottom: 2.5rem;
}

.btn-row { display: flex; flex-wrap: wrap; gap: .6rem; }

.stats-bar {
  margin-top: 4rem; padding-top: 2.5rem;
  border-top: 1px solid var(--border);
  display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem;
  max-width: 480px;
}
.stat-num {
  font-family: var(--serif); font-size: 2.2rem; font-weight: 700;
  color: var(--gold); display: block;
}
.stat-label {
  font-size: .75rem; letter-spacing: .1em;
  text-transform: uppercase; color: var(--gray);
}

/* ═══════════════════════════
   PAGE HEADER (sub-pages)
   ═══════════════════════════ */
.page-header {
  background:
    linear-gradient(180deg, rgba(201,162,39,.04) 0%, transparent 100%),
    var(--navy-mid);
  border-bottom: 1px solid var(--border);
  padding: calc(var(--header) + 3rem) 0 2.5rem;
  text-align: center;
}
.page-header .section-tag { justify-content: center; }
.page-header .section-tag::before { display: none; }
.page-header p.sub {
  color: var(--gray); max-width: 540px;
  margin: .5rem auto 0; font-size: .95rem;
}

/* ═══════════════════════════
   ABOUT / BIO (despre.html)
   ═══════════════════════════ */
.about-section { background: var(--navy-mid); }
.about-grid {
  display: grid; grid-template-columns: 1fr;
  gap: 2.5rem; align-items: start;
}

.about-portrait {
  max-width: 300px; margin: 0 auto;
}
.portrait-frame {
  aspect-ratio: 1/1;
  background: linear-gradient(135deg, var(--navy-light), var(--navy-mid));
  border: 1px solid var(--border-h);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: .8rem; color: var(--gold);
}
.portrait-frame svg { opacity: .3; width: 64px; height: 64px; }
.portrait-frame p {
  font-size: .82rem; color: var(--gray); text-align: center; padding: 0 1.5rem;
}
.portrait-years {
  margin-top: .8rem; text-align: center;
  font-size: .75rem; letter-spacing: .12em;
  color: var(--gray-dim); text-transform: uppercase;
}

.about-body h3 {
  font-family: var(--serif); font-size: 1.4rem; font-weight: 600;
  color: var(--gold-soft); margin: 2rem 0 .8rem;
  padding-bottom: .5rem; border-bottom: 1px solid var(--border);
}
.about-body h3:first-of-type { margin-top: 0; }

/* Timeline */
.timeline { margin: 1.5rem 0; padding-left: 1.2rem; border-left: 2px solid rgba(201,162,39,.2); }
.timeline-item { padding: .6rem 0 .6rem 1.2rem; position: relative; }
.timeline-item::before {
  content: ''; position: absolute; left: -7px; top: .95rem;
  width: 10px; height: 10px; background: var(--gold); border-radius: 50%;
  border: 2px solid var(--navy-mid);
}
.timeline-year {
  font-size: .72rem; letter-spacing: .1em; color: var(--gold);
  text-transform: uppercase; font-weight: 600;
}
.timeline-text { font-size: .9rem; color: var(--text); margin-top: .15rem; }

/* Blockquote */
blockquote {
  background: rgba(201,162,39,.04);
  border-left: 3px solid var(--gold);
  padding: 1.2rem 1.5rem; margin: 1.8rem 0;
  font-family: var(--serif); font-style: italic;
  font-size: 1.05rem; line-height: 1.8; color: var(--text);
}
blockquote cite {
  display: block; margin-top: .8rem; font-style: normal;
  font-family: var(--sans); font-size: .78rem;
  letter-spacing: .06em; color: var(--gold-soft); font-weight: 500;
}

/* ═══════════════════════════
   ARCHIVE
   ═══════════════════════════ */
.archive-years { display: grid; gap: 1.5rem; }

.year-card {
  background: var(--navy-mid);
  border: 1px solid rgba(201,162,39,.1);
  transition: border-color .25s;
}
.year-card:hover { border-color: var(--border-h); }

.year-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 1.3rem; cursor: pointer;
  background: rgba(201,162,39,.03); transition: background .2s;
  -webkit-tap-highlight-color: transparent;
}
.year-header:hover { background: rgba(201,162,39,.06); }
.year-header h3 {
  font-family: var(--serif); font-size: 1.2rem; color: var(--white);
}
.year-toggle {
  color: var(--gold); font-size: 1rem; transition: transform .3s;
}
.year-card.open .year-toggle { transform: rotate(180deg); }

.year-body {
  display: none; padding: 1.2rem;
  grid-template-columns: repeat(auto-fill, minmax(190px,1fr)); gap: .8rem;
}
.year-card.open .year-body { display: grid; }

.download-item {
  background: rgba(255,255,255,.02);
  border: 1px solid rgba(201,162,39,.08);
  padding: .9rem 1rem; display: flex; align-items: center; gap: .7rem;
  cursor: pointer; transition: all .2s;
}
.download-item:hover { background: rgba(201,162,39,.07); border-color: var(--gold); }
.download-icon { color: var(--gold); font-size: 1.1rem; flex-shrink: 0; }
.dl-title { font-size: .85rem; color: var(--white); font-weight: 500; }
.dl-sub { font-size: .72rem; color: var(--gray); margin-top: 1px; }

/* ═══════════════════════════
   REGULAMENT
   ═══════════════════════════ */
.reg-grid {
  display: grid; grid-template-columns: 1fr;
  gap: 2rem; align-items: start;
}

.reg-sidebar {
  background: var(--navy-mid); border: 1px solid var(--border);
  padding: 1.3rem;
}
.reg-sidebar h4 {
  font-size: .72rem; letter-spacing: .15em; text-transform: uppercase;
  color: var(--gold); margin-bottom: .8rem;
}
.reg-sidebar a {
  display: block; padding: .35rem 0; color: var(--gray);
  font-size: .88rem; transition: color .2s;
}
.reg-sidebar a:hover { color: var(--gold); }

.reg-section { margin-bottom: 2.5rem; }
.reg-section h3 {
  font-family: var(--serif); font-size: 1.4rem; font-weight: 600;
  color: var(--gold-soft); margin-bottom: .8rem; padding-bottom: .4rem;
  border-bottom: 1px solid var(--border);
}

.reg-list li {
  padding: .7rem 0; border-bottom: 1px solid rgba(255,255,255,.04);
  color: var(--text); font-size: .93rem; line-height: 1.7;
  display: flex; gap: .8rem;
}
.reg-list li::before { content: '—'; color: var(--gold); flex-shrink: 0; }

.highlight-box {
  background: rgba(201,162,39,.05);
  border-left: 3px solid var(--gold);
  padding: 1rem 1.3rem; margin: 1.5rem 0;
  font-size: .92rem; line-height: 1.7; color: var(--text);
}
.highlight-box strong { color: var(--gold-soft); }

/* ═══════════════════════════
   CONTACT
   ═══════════════════════════ */
.contact-grid {
  display: grid; grid-template-columns: 1fr;
  gap: 2.5rem;
}

.form-card {
  background: var(--navy-mid); border: 1px solid var(--border);
  padding: 2rem 1.5rem;
}
.form-card h2 {
  font-family: var(--serif); font-size: 1.8rem;
  color: var(--white); margin-bottom: .4rem;
}
.form-card .form-intro {
  font-size: .92rem; color: var(--gray); margin-bottom: 2rem; line-height: 1.6;
}

.form-grid { display: grid; grid-template-columns: 1fr; gap: 1.2rem; }
.form-group { display: flex; flex-direction: column; gap: .4rem; }
.form-group label {
  font-size: .73rem; letter-spacing: .1em; text-transform: uppercase;
  color: var(--gold); font-weight: 500;
}
.form-group input,
.form-group textarea {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(201,162,39,.18);
  color: var(--white); padding: .8rem 1rem;
  font-family: var(--sans); font-size: .93rem;
  outline: none; transition: border-color .25s;
  -webkit-appearance: none; appearance: none;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: rgba(255,255,255,.2); }
.form-group input:focus,
.form-group textarea:focus { border-color: var(--gold); }
.form-group textarea { resize: vertical; min-height: 120px; }

.contact-info { display: flex; flex-direction: column; gap: 1.2rem; }
.contact-item {
  display: flex; gap: 1rem; padding: 1.2rem;
  background: var(--navy-mid); border: 1px solid var(--border);
  transition: border-color .25s;
}
.contact-item:hover { border-color: var(--border-h); }
.contact-item-icon {
  width: 40px; height: 40px; min-width: 40px;
  display: flex; align-items: center; justify-content: center;
  color: var(--gold); font-size: 1.2rem;
}
.contact-item h4 {
  font-family: var(--serif); font-size: 1rem; color: var(--white);
  margin-bottom: .15rem;
}
.contact-item p { font-size: .85rem; color: var(--gray); line-height: 1.6; }
.contact-item a { color: var(--gold-soft); transition: color .2s; }
.contact-item a:hover { color: var(--gold); }

.contact-info-page {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.form-success {
  display: none; padding: 1rem; font-size: .92rem;
  background: rgba(34,197,94,.06); border: 1px solid rgba(34,197,94,.25);
  color: #86efac; margin-bottom: 1rem;
}
.form-success.show { display: block; }

/* ═══════════════════════════
   FOOTER
   ═══════════════════════════ */
.site-footer {
  background: rgba(0,0,0,.35);
  border-top: 1px solid var(--border);
  padding: 2.5rem 1.5rem; text-align: center;
}
.footer-logo {
  font-family: var(--serif); font-size: 1.4rem;
  color: var(--gold); margin-bottom: .4rem;
}
.footer-links {
  display: flex; justify-content: center; gap: 1.5rem;
  margin: 1.2rem 0; flex-wrap: wrap;
}
.footer-links a {
  color: var(--gray); font-size: .82rem; transition: color .2s;
}
.footer-links a:hover { color: var(--gold); }
.site-footer p { font-size: .8rem; color: var(--gray-dim); }

/* ═══════════════════════════
   ANIMATIONS
   ═══════════════════════════ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-in { opacity: 0; transform: translateY(24px); transition: opacity .55s ease, transform .55s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* Hero stagger */
.hero-content > * { animation: fadeUp .7s ease forwards; opacity: 0; }
.hero-eyebrow    { animation-delay: .1s; }
.hero h1         { animation-delay: .22s; }
.hero-subtitle   { animation-delay: .34s; }
.hero-desc       { animation-delay: .44s; }
.hero .btn-row   { animation-delay: .54s; }
.hero .stats-bar { animation-delay: .64s; }

/* ═══════════════════════════
   RESPONSIVE — Tablet
   ═══════════════════════════ */
@media (min-width: 640px) {
  .about-grid { grid-template-columns: 260px 1fr; gap: 3.5rem; }
  .about-portrait { margin: 0; position: sticky; top: calc(var(--header) + 2rem); }

  .form-grid { grid-template-columns: 1fr 1fr; }
  .form-group.full { grid-column: 1 / -1; }

  .contact-grid { grid-template-columns: 1fr 1fr; gap: 2.5rem; }

  .year-body { grid-template-columns: repeat(auto-fill, minmax(200px,1fr)); }
}

/* ═══════════════════════════
   RESPONSIVE — Desktop
   ═══════════════════════════ */
@media (min-width: 960px) {
  .about-grid { grid-template-columns: 300px 1fr; gap: 4.5rem; }

  .reg-grid { grid-template-columns: 250px 1fr; gap: 2.5rem; }
  .reg-sidebar { position: sticky; top: calc(var(--header) + 1.5rem); }

  .form-card { padding: 2.5rem; }
}

/* ═══════════════════════════
   RESPONSIVE — Mobile
   ═══════════════════════════ */
@media (max-width: 639px) {
  .hamburger { display: flex; }

  /* CRITICAL: backdrop-filter creates a new containing block,
     which makes position:fixed on .nav-links position relative
     to the 70px nav instead of the viewport. Remove it on mobile. */
  .site-nav {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: var(--navy);
  }

  .nav-links {
    display: none; flex-direction: column; align-items: stretch;
    position: fixed; top: var(--header); left: 0; right: 0; bottom: 0;
    background: var(--navy); padding: 1.5rem; gap: 0;
    border-top: 1px solid var(--border);
    overflow-y: auto; -webkit-overflow-scrolling: touch;
    z-index: 101;
  }
  .nav-links.open { display: flex; }

  .nav-links > li { display: block; width: 100%; }

  .nav-links > li > a {
    font-size: 1.1rem; padding: 1rem 0; display: block; width: 100%;
    border-bottom: 1px solid rgba(255,255,255,.05);
    letter-spacing: .04em;
  }

  .nav-links > li:last-child > a {
    border-bottom: none;
  }

  .nav-cta {
    margin-top: .8rem; text-align: center; display: block !important;
    padding: .95rem 1.5rem !important; border-bottom: none !important;
  }

  /* Flatten dropdown on mobile — always visible */
  .has-dropdown .dropdown {
    position: static; opacity: 1; visibility: visible;
    transform: none; border: none; background: transparent;
    padding: 0 0 .3rem 1.2rem; min-width: 0;
  }
  .dropdown li { display: block; }
  .dropdown a {
    padding: .55rem 0 !important; border-bottom: none !important;
    font-size: .92rem !important; color: var(--gray-dim) !important;
    letter-spacing: .03em !important;
  }
  .dropdown a:hover { color: var(--gold) !important; }

  .hero { min-height: 100svh; }
  .hero-content { padding-top: 1rem; }
  .btn-row { flex-direction: column; }
  .btn-row .btn-primary,
  .btn-row .btn-secondary { width: 100%; text-align: center; }
  .btn-secondary { margin-left: 0 !important; }
  .stats-bar { grid-template-columns: repeat(3,1fr); gap: 1rem; }

  .portrait-frame { max-height: 360px; }

  .archive-years .year-body { grid-template-columns: 1fr; }

  .contact-info-page { grid-template-columns: 1fr; }
}

/* ─ Landscape phones ─ */
@media (max-width: 639px) and (orientation: landscape) {
  .hero { min-height: auto; padding: 2rem 0; }
  .stats-bar { margin-top: 2rem; }
}