/* =========================================================
   FILE: /css/landing.css
   PURPOSE: Homepage (header+hero combinate), sections & footer
   LAST EDIT: 2025-09-05
   ========================================================= */

/* =========================================================
   1) TOKENS (culori, radius, umbre, dimensiuni)
   ========================================================= */
:root{
  /* Paletă light unificată */
  --bg:#ffffff;
  --text:#0f172a;
  --muted:#eaf2ff;              /* text deschis pe Hero */
  --muted-dark:#64748b;         /* descrieri secțiuni */
  --border:#e5e7eb;
  --card:#ffffff;
  --light:#f8fafc;
  --shadow:0 10px 30px rgba(15, 23, 42, .12);
  --radius:16px;

  /* curbă inferioară pentru masthead (spațiu sub hero) */
  --curveH: 110px;

  /* Buton flat – albastru recomandat (bun la contrast pe gradient) */
  --btn-solid:#3B82F6;
  --btn-solid-h:#336fe0;
  --btn-solid-text:#ffffff;

  /* Forțăm UI light în toate browserele */
  color-scheme: light only;
}

/* =========================================================
   2) BASE (reset minimal & accesibilitate)
   ========================================================= */
*{ box-sizing:border-box }
html,body{ height:100% }
html,body{ overflow-x:hidden } /* previne scroll orizontal */
html:focus-within{ scroll-behavior:smooth }
body{
  margin:0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{ max-width:100%; height:auto; display:block }
a{ color:inherit; text-decoration:none }
a,button{ cursor:pointer }
:focus-visible{ outline:3px solid #3B82F6; outline-offset:2px }

/* =========================================================
   3) UTILITIES (containere, aliniere, helpers)
   ========================================================= */
.container{ width:min(1140px,92%); margin-inline:auto }
.text-center{ text-align:center }
.center{ margin-inline:auto }
.max-width-md{ max-width:760px }
.bg-light{ background:var(--light) }

/* =========================================================
   4) MASTHEAD (Header + Hero în același background)
      - gradient + formă curbată adaptivă jos
   ========================================================= */
.masthead{
  position:relative; z-index:0;
  /* Gradient: bleu semi-deschis -> bleu deschis + strat subtil */
  background:
    radial-gradient(1200px 600px at 50% -240px, rgba(255,255,255,.22), transparent 60%),
    linear-gradient(180deg, #5a67d8 0%, #9AC5FF 45%, #D9EAFF 100%);
  /* apropie prima secțiune de hero */
  padding-bottom: clamp(56px, 6vw, var(--curveH));
}
.masthead::after{
  content:"";
  position:absolute; left:50%; transform:translateX(-50%);
  bottom:-1px;
  width:100%;
  height: clamp(56px, 6vw, var(--curveH));
  background:var(--bg);
  border-radius: 50% 50% 0 0 / 40% 40% 0 0;
  box-shadow: 0 -1px 0 rgba(255,255,255,.6) inset;
  pointer-events:none; z-index:0;
}
.masthead > *{ position:relative; z-index:1 }

/* =========================================================
   5) HEADER (fără sticky; nav desktop + burger mobil)
   ========================================================= */
.landing-header{
  position:relative; top:auto; z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
}
.header-inner{
  height:72px;
  display:flex; align-items:center; justify-content:space-between;
  position:relative;
}

/* ===== BRAND ===== */
.brand{
  display:flex; align-items:center; gap:.6rem;
}
.brand-logo{
  height:34px; width:auto; display:block;
  filter: drop-shadow(0 1px 2px rgba(0,0,0,.35)); /* vizibil pe gradient */
}
.brand-text{
  font-family: Figtree, Inter, sans-serif;
  color:#ffffff; font-weight:800; letter-spacing:.2px; font-size:1.15rem;
  text-shadow:0 1px 2px rgba(0,0,0,.35);
}
.brand-dot{ color:#eaf2ff }
.brand-mark{ display:none !important } /* elimină vechiul placeholder dacă apare */

/* ===== NAV DESKTOP ===== */
.nav-desktop{ display:flex; gap:1.25rem }
.nav-desktop a{
  position:relative; padding:.5rem .25rem;
  color:#ffffff; font-weight:700;
  text-shadow:0 1px 2px rgba(0,0,0,.35);
}
.nav-desktop a::after{
  content:""; position:absolute; left:0; right:0; bottom:.2rem; height:2px;
  background:rgba(255,255,255,0);
  transform:scaleX(0); transform-origin:left;
  transition:transform .2s ease, background .2s ease;
}
.nav-desktop a:hover::after{ background:rgba(255,255,255,.9); transform:scaleX(1) }
@media (max-width: 767.98px){
  .nav-desktop{ display:none }
}

/* ===== NAV MOBIL (burger din exemplu, ancorat la dreapta) ===== */
#menu{
  display:none; z-index:70; margin-left:auto; position:relative;
}
@media (max-width: 767.98px){
  #menu{ display:block }
}
#menu-bar{
  width:45px; height:40px; margin:0; cursor:pointer;
  display:grid; place-items:center;
}
.bar{
  height:3px; width:26px; background-color:#ffffff; display:block;
  border-radius:3px; transition: .3s ease;
}
/* #bar1{ transform: translateY(-7px) }
#bar2{ transform: translateY(0) }
#bar3{ transform: translateY(7px) } */

/* meniul mobil (popup) */
.nav{
  transition:.3s ease; display:none; position:absolute; top:56px; right:0;
  background: rgba(10,24,48,.32);
  backdrop-filter: blur(10px) saturate(140%);
  border:1px solid rgba(255,255,255,.25);
  border-radius:14px; min-width:210px;
}
.nav.change{ display:block }
.nav ul{ padding:.35rem .6rem; margin:0 }
.nav li{ list-style:none; padding:.35rem 0 }
.nav li a{
  color:#fff; font-size:18px; text-decoration:none; display:block;
  padding:.5rem .6rem; border-radius:10px;
}
.nav li a:hover{ font-weight:700; background:rgba(255,255,255,.12) }

/* animația X pe burger (clasa .change e pusă pe #menu-bar) */
.change #bar1{ transform: rotate(45deg) }
.change #bar2{ opacity:0 }
.change #bar3{ transform: rotate(-45deg) }

/* background radial (fără overflow) */
.menu-bg, #menu{ top:0; right:0; position:absolute }
.menu-bg{
  z-index:60; width:140px; height:140px;
  top: 18px; right: 14px;
  background: radial-gradient(circle, rgba(255,255,255,.25), rgba(255,255,255,.05));
  border-radius:50%;
  transform-origin: 75% 25%;
  transform: scale(0);
  transition: transform .3s ease;
  pointer-events:none;
}
.change-bg{ transform: scale(8) }

/* =========================================================
   6) HERO (1 col; CTA flat + features sub buton)
   ========================================================= */
.hero{
  background:
    radial-gradient(900px 400px at 50% -140px, rgba(255,255,255,.18), transparent 60%),
    repeating-conic-gradient(from 0deg at 10% 10%, rgba(255,255,255,.08) 0% 6%, transparent 6% 12%);
  padding: clamp(2.2rem, 6.2vw, 4.4rem) 0 1rem; /* bottom micșorat */
}
.hero-grid{ display:grid; gap:1.1rem; align-items:center; grid-template-columns:1fr }
.hero h1{
  font-family:Figtree, Inter, sans-serif;
  font-weight:800; letter-spacing:-.02em;
  font-size:clamp(1.9rem, 4.6vw, 3rem);
  line-height:1.12;
  margin:0 0 .5rem 0;
  color:#fff;
  text-shadow:0 1px 2px rgba(0,0,0,.35);
}
.hero h1 .line{ display:block }
.subtitle{ color:var(--text); font-size:clamp(1rem,1.8vw,1.15rem); margin:0 0 1rem 0 }
.hero .subtitle.hero-sub{ color:var(--muted); font-weight:800 }

/* CTA + features */
.hero-cta{ margin:.2rem 0 0 0 }

/* Buton flat */
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:1.0rem 1.45rem;
  border-radius:999px; border:none;
  font-weight:800; transition:transform .06s, background .15s;
}
.btn:active{ transform:translateY(1px) }
.btn-primary{ background: var(--btn-solid); color: var(--btn-solid-text) }
.btn-primary:hover{ background: var(--btn-solid-h) }
.btn-xl{ font-size:1.04rem }

/* Features orizontal sub buton */
.hero-features{
  display:flex; align-items:center; gap:1rem; flex-wrap:nowrap;
  margin:.85rem 0 0 0; padding:0; list-style:none;
  color:#eef4ff; font-weight:800; font-size:.95rem;
}
.hero-features li{ white-space:nowrap }
@media (max-width: 480px){
  .hero-features{ font-size:.86rem; gap:.6rem }
}
@media (max-width: 360px){
  .hero-features{ font-size:.78rem; gap:.5rem }
}

/* =========================================================
   7) SECTIONS (spațiere + titluri)
   ========================================================= */
.section{ padding: clamp(2.5rem, 7vw, 4rem) 0 }
.title-sm{
  font-family:Figtree, Inter, sans-serif;
  font-size:clamp(1.25rem,2.2vw,1.6rem);
  margin:0 0 .5rem 0;
}
blockquote{
  margin:1rem 0; padding:1rem 1.25rem;
  border-left:4px solid #3B82F6;
  background: color-mix(in srgb, var(--light) 70%, transparent);
  border-radius:10px;
}

/* =========================================================
   8) CATEGORIES (grid link-uri)
   ========================================================= */
.quiz-categories-grid{
  display:grid; gap:1rem; grid-template-columns:1fr; margin-top:1rem;
}
.quiz-category-link{
  display:block; background:var(--card); border:1px solid var(--border);
  border-radius:var(--radius); padding:1.1rem;
  transition:box-shadow .2s ease, transform .12s ease, border-color .2s ease;
}
.quiz-category-link:hover{
  box-shadow:var(--shadow);
  border-color:color-mix(in srgb, #3B82F6 30%, var(--border));
  transform:translateY(-2px);
}
.quiz-category-link h3{ margin:.2rem 0 .25rem 0; font-size:1.05rem; font-weight:700 }
.quiz-category-link p{ color:var(--muted-dark); margin:0 }

@media (min-width:640px){ .quiz-categories-grid{ grid-template-columns:repeat(2,1fr) } }
@media (min-width:900px){ .quiz-categories-grid{ grid-template-columns:repeat(3,1fr) } }

/* =========================================================
   9) POPULAR (grid carduri)
   ========================================================= */
.popular-quizzes-grid{ display:grid; gap:1rem; grid-template-columns:1fr }
.quiz-card{
  display:block; padding:1rem 1.1rem;
  background:var(--card); border:1px solid var(--border);
  border-radius:var(--radius);
  transition:box-shadow .2s ease, transform .12s ease, border-color .2s ease, color .2s ease;
}
.quiz-card:hover{
  box-shadow:var(--shadow);
  border-color:color-mix(in srgb, #3B82F6 30%, var(--border));
  transform:translateY(-2px);
}
.quiz-card h3{ margin:.1rem 0 .35rem 0; font-size:1.05rem }
.quiz-card p{ margin:0; color:var(--muted-dark) }

@media (min-width:640px){ .popular-quizzes-grid{ grid-template-columns:repeat(2,1fr) } }
@media (min-width:900px){ .popular-quizzes-grid{ grid-template-columns:repeat(3,1fr) } }

/* =========================================================
   10) RESEARCH (cards)
   ========================================================= */
.research-grid{ display:grid; gap:1rem; grid-template-columns:1fr }
.research-card{
  background:var(--card); border:1px solid var(--border); border-radius:var(--radius);
  padding:1rem 1.1rem;
  transition:box-shadow .2s ease, transform .12s ease, border-color .2s ease;
}
.research-card:hover{
  box-shadow:var(--shadow);
  border-color:color-mix(in srgb, #3B82F6 30%, var(--border));
  transform:translateY(-2px);
}
.research-card h3{ margin:0 0 .35rem 0; font-size:1.05rem }
.research-card p{ margin:0 0 .35rem 0; color:var(--muted-dark) }

/* =========================================================
   11) FAQ
   ========================================================= */
.faq-list{ display:grid; gap:.9rem }
.faq-item{
  background:var(--card); border:1px solid var(--border);
  border-radius:var(--radius); padding:1rem 1.1rem;
}
.faq-item h3{ margin:.1rem 0 .25rem 0; font-size:1.02rem }
.faq-item p{ margin:0; color:var(--muted-dark) }

/* =========================================================
   12) FOOTER (stack vertical, centrat + linkuri pe un rând)
   ========================================================= */
.footer-stack{
  display:flex; flex-direction:column; align-items:center;
  gap:.6rem;
}
.landing-footer{
  border-top:1px solid var(--border);
  padding:1.25rem 0;
  color:#64748b; font-size:.95rem;
}
.footer-note{ margin:0 0 .25rem 0; color:#64748b }
.footer-links.vertical{
  display:flex; flex-direction: row; gap:.5rem; flex-wrap:wrap; justify-content:center;
}
.footer-links.vertical a{ color:#64748b }
.footer-links.vertical a:hover{ color:var(--text) }

/* =========================================================
   13) REDUCED MOTION (accesibilitate)
   ========================================================= */
@media (prefers-reduced-motion: reduce){
  *{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
}

/* =========================================================
   14) HERO TEXT COLORS (global, pentru toate paginile cu masthead)
   ========================================================= */
.masthead .hero h1 { color: #fff; }
.masthead .hero .subtitle,
.masthead .hero .hero-sub { color: #fff !important; }
.masthead .hero .hero-features li { color: #fff; }