/* ==============================
   RESET & BASE
============================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --blood:   #8b0000; /* Dark Red */
  --brick:   #b22222; /* Firebrick */
  --uranium: #2f4f4f; /* Dark Slate Gray */
  --dark:    #111111; /* Almost Black */
  --dark2:   #1c1c1c;
  --accent:  #d3d3d3; /* Light Grey */
  --cream:   #e0e0e0;
  --text:    #dcdcdc;
  --radius:  16px;
  --shadow:  0 10px 40px rgba(0,0,0,0.8);
}

html { scroll-behavior: smooth; }
body { font-family: 'Nunito', sans-serif; background: var(--dark); color: var(--text); overflow-x: hidden; }
h1,h2,h3 { font-family: 'Cinzel', serif; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* ==============================
   HERO
============================== */
.hero {
  min-height: 100vh;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  position: relative;
  background: radial-gradient(circle at 50% 50%, rgba(139, 0, 0, 0.3) 0%, rgba(17, 17, 17, 0.95) 100%),
              url('https://upload.wikimedia.org/wikipedia/commons/thumb/c/ca/V%C4%9B%C5%BE_smrti_Ostrov.jpg/1280px-V%C4%9B%C5%BE_smrti_Ostrov.jpg') center/cover no-repeat;
  text-align: center; overflow: hidden;
}
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(180deg, transparent 0%, var(--dark) 100%); pointer-events: none; }
.hero-particles { position: absolute; inset: 0; pointer-events: none; }
.particle { position: absolute; background: var(--brick); border-radius: 50%; opacity: 0; animation: drift linear infinite; }
@keyframes drift {
  0%   { opacity: 0; transform: translateY(0) translateX(0) scale(0.5); }
  20%  { opacity: 0.3; }
  100% { opacity: 0; transform: translateY(-100vh) translateX(50px) scale(1.5); }
}

.hero-content { position: relative; z-index: 2; padding: 40px; max-width: 850px; }
.tower-icon { font-size: 85px; margin-bottom: 20px; display: block; filter: drop-shadow(0 0 25px var(--blood)); }
.hero-title {
  font-size: clamp(2.8rem, 8vw, 5rem); color: #fff;
  text-shadow: 0 0 30px rgba(139,0,0,0.8), 0 5px 15px rgba(0,0,0,0.9);
  letter-spacing: 2px; line-height: 1.1;
}
.hero-subtitle { font-size: 1.3rem; color: var(--accent); letter-spacing: 4px; text-transform: uppercase; margin: 15px 0 30px; }
.hero-desc { font-size: 1.25rem; color: var(--cream); line-height: 1.7; max-width: 650px; margin: 0 auto 35px; }
.hero-steps { display: flex; align-items: center; justify-content: center; gap: 15px; flex-wrap: wrap; margin-bottom: 40px; }
.step-badge { background: rgba(139,0,0,0.2); border: 1px solid var(--brick); color: var(--cream); padding: 10px 22px; border-radius: 50px; font-weight: 700; backdrop-filter: blur(5px); }
.step-arrow { color: var(--brick); font-size: 1.4rem; }

.scroll-indicator { position: absolute; bottom: 30px; color: var(--brick); font-size: 2.2rem; animation: bounce 2s infinite; cursor: pointer; }
@keyframes bounce { 0%,100% { transform: translateY(0); } 50% { transform: translateY(15px); } }

/* ==============================
   BUTTONS
============================== */
.btn-primary {
  background: linear-gradient(135deg, var(--blood), var(--brick));
  color: #fff; border: 1px solid var(--accent); padding: 16px 40px; border-radius: 50px;
  font-size: 1.15rem; font-weight: 800; cursor: pointer; transition: 0.3s;
  box-shadow: 0 5px 25px rgba(139,0,0,0.4);
}
.btn-primary:hover { background: var(--brick); color: #fff; transform: translateY(-3px); box-shadow: 0 8px 35px rgba(139,0,0,0.6); }
.btn-secondary { background: transparent; border: 2px solid var(--brick); color: var(--brick); padding: 14px 34px; border-radius: 50px; font-weight: 700; cursor: pointer; }

/* ==============================
   SECTION STYLES
============================== */
.learn-section { padding: 100px 0; background: var(--dark2); border-top: 2px solid var(--blood); }
.section-title { text-align: center; font-size: 3rem; color: #fff; margin-bottom: 15px; }
.section-sub { text-align: center; color: var(--accent); font-size: 1.2rem; margin-bottom: 60px; }

/* CARDS */
.cards-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 30px; margin-bottom: 100px; }
.flip-card { height: 240px; perspective: 1000px; cursor: pointer; }
.flip-card-inner { position: relative; width: 100%; height: 100%; transition: transform 0.6s; transform-style: preserve-3d; }
.flip-card.flipped .flip-card-inner { transform: rotateY(180deg); }
.flip-front, .flip-back { position: absolute; inset: 0; border-radius: var(--radius); backface-visibility: hidden; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 25px; text-align: center; box-shadow: var(--shadow); border: 1px solid rgba(139,0,0,0.3); }
.flip-front { background: #161616; }
.flip-front .card-icon { font-size: 4rem; margin-bottom: 15px; }
.flip-front .card-title { color: var(--brick); font-size: 1.15rem; font-weight: 800; }
.flip-back { background: var(--blood); transform: rotateY(180deg); }
.flip-back p { font-size: 1.05rem; line-height: 1.6; color: #fff; }

/* TIMELINE */
.timeline-wrap { margin-bottom: 100px; }
.timeline-title { text-align: center; font-size: 2.2rem; color: var(--brick); margin-bottom: 55px; }
.timeline { position: relative; max-width: 850px; margin: 0 auto; padding-left: 50px; border-left: 3px solid var(--brick); }
.tl-item { position: relative; margin-bottom: 45px; opacity: 0; transform: translateX(-30px); transition: 0.6s; }
.tl-item.visible { opacity: 1; transform: translateX(0); }
.tl-dot { position: absolute; left: -61px; top: 6px; width: 20px; height: 20px; border-radius: 50%; background: var(--blood); box-shadow: 0 0 15px var(--blood); border: 2px solid var(--accent); }
.tl-year { font-weight: 800; color: var(--accent); font-size: 1.2rem; }
.tl-text { font-size: 1.15rem; margin-top: 5px; color: var(--text); line-height: 1.6; }

/* MAP + FACTS */
.map-fact { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; margin-bottom: 80px; }
@media (max-width: 850px) { .map-fact { grid-template-columns: 1fr; } }
.fun-facts-box { background: #161616; border-radius: var(--radius); padding: 40px; border: 1px solid rgba(139,0,0,0.3); }
.fun-facts-box h3 { font-size: 1.7rem; color: var(--brick); margin-bottom: 30px; }
.fun-list li { display: flex; gap: 15px; align-items: flex-start; margin-bottom: 18px; font-size: 1.1rem; color: var(--cream); opacity: 0; transform: translateX(25px); transition: 0.5s; }
.fun-list li.visible { opacity: 1; transform: translateX(0); }

/* QUIZ */
.quiz-section { padding: 100px 0; background: var(--dark); border-top: 2px solid var(--blood); }
.quiz-card { max-width: 800px; margin: 0 auto; background: var(--dark2); padding: 60px; border-radius: 30px; box-shadow: var(--shadow); border: 1px solid rgba(139,0,0,0.3); }
.quiz-progress-bar { width: 100%; height: 10px; background: #000; border-radius: 5px; margin-bottom: 30px; overflow: hidden; }
#quizProgressFill { height: 100%; background: var(--brick); width: 0; transition: width 0.4s; }
.quiz-opt { width: 100%; background: #222; border: 1px solid #333; padding: 18px; text-align: left; border-radius: 15px; color: #fff; cursor: pointer; margin-bottom: 12px; transition: 0.2s; font-size: 1.1rem; }
.quiz-opt:hover { background: #333; border-color: var(--brick); }
.quiz-opt.correct { background: rgba(46, 204, 113, 0.1); border-color: #2ecc71; color: #2ecc71; }
.quiz-opt.wrong { background: rgba(139, 0, 0, 0.3); border-color: var(--blood); color: #ff6b6b; }

/* DIPLOMA */
.diploma-section { padding: 100px 0; text-align: center; background: var(--dark2); border-top: 2px solid var(--blood); }
.diploma-input { padding: 15px 30px; border-radius: 50px; border: 2px solid var(--brick); background: #111; color: #fff; width: 350px; outline: none; margin-bottom: 25px; font-size: 1.1rem; }
#diplomaCanvas { max-width: 100%; height: auto; border-radius: 20px; box-shadow: var(--shadow); border: 2px solid #333; }

/* FOOTER */
.site-footer { padding: 60px 0; background: #000; text-align: center; border-top: 2px solid var(--blood); }
.footer-small { font-size: 0.9rem; opacity: 0.4; margin-top: 12px; }