@import url('https://fonts.googleapis.com/css2?family=Anton&family=Source+Serif+4:ital,wght@0,300;0,400;1,300;1,400&family=Azeret+Mono:wght@300;400&display=swap');

:root {
  --void:       #00060e;
  --abyss:      #010d1a;
  --trench:     #021422;
  --deep:       #042038;
  --surge:      #083060;
  --wave:       #0e5080;
  --crest:      #1a80b0;
  --spray:      #40b8e0;
  --foam:       #a0ddf0;
  --white:      #e8f8ff;
  --danger:     #f05020;
  --card-bg:    rgba(2,20,34,0.72);
  --card-border:rgba(64,184,224,0.16);
  --text-main:  #c8ecf8;
  --text-muted: #4a8aaa;
  --mono:       'Azeret Mono', monospace;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: 'Source Serif 4', Georgia, serif;
  background: var(--void);
  color: var(--text-main);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── Fixed backgrounds ── */
.depth-bg {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(ellipse 110% 55% at 50% 100%, rgba(8,48,96,0.7) 0%, transparent 62%),
    radial-gradient(ellipse 70%  40% at 10% 20%,  rgba(6,30,60,0.5)  0%, transparent 55%),
    linear-gradient(180deg, #00060e 0%, #010d1a 50%, #00060c 100%);
}

#wave-bg {
  position: fixed; inset: 0; z-index: 0; pointer-events: none; opacity: 0.22;
}

/* ── Scroll progress ── */
#progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0%;
  background: linear-gradient(90deg, var(--surge), var(--spray));
  z-index: 9999; pointer-events: none;
}

/* ── Layout ── */
.wrap {
  position: relative; z-index: 1;
  max-width: 1000px; margin: 0 auto; padding: 0 28px 100px;
}

/* ━━━━━━━━━━━━━━━━ HERO ━━━━━━━━━━━━━━━━ */
.hero {
  min-height: 92vh; display: flex; flex-direction: column;
  justify-content: flex-end; padding-bottom: 64px;
  position: relative; overflow: hidden;
  opacity: 0; animation: waveIn 1.2s 0.1s cubic-bezier(0.16,1,0.3,1) forwards;
}
@keyframes waveIn {
  from { opacity:0; transform: translateY(32px); }
  to   { opacity:1; transform: none; }
}

.hero-eyebrow {
  font-family: var(--mono); font-size: 0.65rem; font-weight: 300;
  letter-spacing: 0.32em; text-transform: uppercase;
  color: var(--spray); margin-bottom: 20px;
}

.hero-title {
  font-family: 'Anton', Impact, sans-serif;
  font-size: clamp(6rem, 20vw, 18rem);
  font-weight: 400; line-height: 0.82;
  letter-spacing: -0.03em; color: var(--white);
  text-transform: uppercase; position: relative;
}
.hero-title .ghost-line {
  display: block; color: transparent;
  -webkit-text-stroke: 1.5px rgba(64,184,224,0.25);
  font-size: 38%; letter-spacing: 0.08em;
  margin-bottom: 6px; font-weight: 400;
}

.hero-bottom {
  display: grid; grid-template-columns: 1fr 1fr 1fr;
  gap: 0; margin-top: 32px;
  border-top: 1px solid rgba(64,184,224,0.2);
  padding-top: 24px;
}
.hero-fact { padding: 0 28px 0 0; }
.hero-fact:first-child { padding-left: 0; }
.hero-fact + .hero-fact { border-left: 1px solid rgba(64,184,224,0.12); padding-left: 28px; }
.hero-fact-val {
  font-family: 'Anton', sans-serif; font-size: 2.6rem;
  color: var(--spray); line-height: 1; display: block; margin-bottom: 4px;
}
.hero-fact-lbl { font-size: 0.85rem; font-style: italic; color: var(--text-muted); line-height: 1.45; }

.hero-desc {
  grid-column: 1/-1; margin-top: 24px;
  font-size: 1.1rem; line-height: 1.85; color: var(--text-muted);
  font-style: italic; max-width: 680px;
}

/* ━━━━━━━━━━━━━━━━ SECTION UTILS ━━━━━━━━━━━━━━━━ */
.sec-tag {
  font-family: var(--mono); font-size: 0.62rem; font-weight: 300;
  letter-spacing: 0.3em; text-transform: uppercase;
  color: var(--spray); margin-bottom: 10px;
}
.sec-h2 {
  font-family: 'Anton', sans-serif; font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 400; text-transform: uppercase; letter-spacing: -0.02em;
  color: var(--white); margin-bottom: 32px; line-height: 1;
}
.wave-rule {
  width: 100%; height: 1px; margin: 64px 0;
  background: linear-gradient(90deg, transparent, var(--spray), var(--wave), transparent);
  opacity: 0.3;
}

/* ━━━━━━━━━━━━━━━━ CAUSES ━━━━━━━━━━━━━━━━ */
.causes-section { opacity: 0; animation: rise 0.8s forwards; }

.causes-stack { display: flex; flex-direction: column; gap: 2px; }
.cause-row {
  display: grid; grid-template-columns: 56px 220px 1fr;
  align-items: center; gap: 0;
  padding: 22px 24px; background: var(--card-bg);
  border: 1px solid rgba(64,184,224,0.08);
  border-radius: 4px; backdrop-filter: blur(12px);
  transition: background 0.28s, border-color 0.28s;
  cursor: default; overflow: hidden; position: relative;
}
.cause-row::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0;
  width: 3px; background: var(--spray); transform: scaleY(0);
  transform-origin: bottom; transition: transform 0.35s ease;
}
.cause-row:hover { background: rgba(8,48,96,0.6); border-color: rgba(64,184,224,0.25); }
.cause-row:hover::before { transform: scaleY(1); }

.cause-num {
  font-family: var(--mono); font-size: 0.7rem; color: rgba(64,184,224,0.4);
  font-weight: 300; letter-spacing: 0.1em;
}
.cause-name {
  font-family: 'Anton', sans-serif; font-size: 1rem;
  text-transform: uppercase; letter-spacing: 0.04em; color: var(--foam);
  padding-right: 24px; border-right: 1px solid rgba(64,184,224,0.1);
}
.cause-desc { padding-left: 24px; font-size: 0.93rem; line-height: 1.7; color: var(--text-muted); }

/* ━━━━━━━━━━━━━━━━ PHYSICS ━━━━━━━━━━━━━━━━ */
.physics-section { opacity: 0; animation: rise 0.8s forwards; }

.physics-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 2px; border-radius: 14px; overflow: hidden;
  background: rgba(64,184,224,0.08);
}
.phys-cell {
  background: var(--card-bg); padding: 26px 22px;
  backdrop-filter: blur(12px);
  transition: background 0.3s; position: relative; overflow: hidden;
}
.phys-cell::after {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--spray), transparent);
  opacity: 0; transition: opacity 0.3s;
}
.phys-cell:hover { background: rgba(8,48,96,0.65); }
.phys-cell:hover::after { opacity: 1; }
.phys-icon { font-size: 1.8rem; margin-bottom: 12px; display: block; }
.phys-cell h3 { font-family: 'Anton', sans-serif; font-size: 1.15rem; text-transform: uppercase;
  letter-spacing: 0.02em; color: var(--foam); margin-bottom: 10px; }
.phys-cell p { font-size: 0.91rem; line-height: 1.73; color: var(--text-muted); }
.phys-val {
  margin-top: 12px; font-family: var(--mono); font-size: 0.72rem;
  color: var(--spray); letter-spacing: 0.12em;
}

/* ━━━━━━━━━━━━━━━━ HISTORICAL TABLE ━━━━━━━━━━━━━━━━ */
.history-section { opacity: 0; animation: rise 0.8s forwards; }

.tsun-table { width: 100%; border-collapse: collapse; }
.tsun-table th {
  font-family: var(--mono); font-size: 0.62rem; font-weight: 300;
  letter-spacing: 0.22em; text-transform: uppercase; color: var(--spray);
  padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--card-border);
}
.tsun-table td {
  padding: 14px 16px; border-bottom: 1px solid rgba(64,184,224,0.06);
  font-size: 0.92rem; color: var(--text-muted); vertical-align: middle;
}
.tsun-table tr:hover td { background: rgba(64,184,224,0.04); }
.tsun-table td:first-child { font-family: var(--mono); font-size: 0.88rem; color: var(--spray); }
.tsun-table td:nth-child(2) { color: var(--foam); font-style: italic; }
.magnitude { font-family: var(--mono); font-weight: 400; color: var(--crest); }
.victims { font-family: var(--mono); color: var(--danger); }

/* ━━━━━━━━━━━━━━━━ ALERT SYSTEM ━━━━━━━━━━━━━━━━ */
.alert-section { opacity: 0; animation: rise 0.8s forwards; }

.alert-levels { display: flex; flex-direction: column; gap: 0;
  border: 1px solid var(--card-border); border-radius: 14px; overflow: hidden; }
.alert-level {
  display: grid; grid-template-columns: 8px 130px 1fr;
  gap: 0; border-bottom: 1px solid rgba(64,184,224,0.07);
  transition: background 0.25s;
}
.alert-level:last-child { border-bottom: none; }
.alert-level:hover { background: rgba(64,184,224,0.04); }
.alert-bar { min-height: 100%; }
.alert-name {
  padding: 20px 22px; font-family: 'Anton', sans-serif;
  font-size: 0.95rem; text-transform: uppercase; letter-spacing: 0.04em;
  color: var(--foam); display: flex; align-items: center;
  border-right: 1px solid rgba(64,184,224,0.08);
}
.alert-desc { padding: 20px 22px; font-size: 0.91rem; line-height: 1.7; color: var(--text-muted); }

/* ━━━━━━━━━━━━━━━━ PREVENTION CARDS ━━━━━━━━━━━━━━━━ */
.prev-section { opacity: 0; animation: rise 0.8s forwards; }

.prev-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.prev-card {
  background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 14px;
  padding: 24px 22px; backdrop-filter: blur(10px);
  transition: transform 0.3s, box-shadow 0.3s;
}
.prev-card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(0,60,100,0.4); }
.prev-card-icon { font-size: 1.9rem; margin-bottom: 14px; display: block; }
.prev-card h3 { font-family: 'Anton', sans-serif; font-size: 1.1rem; text-transform: uppercase;
  letter-spacing: 0.02em; color: var(--foam); margin-bottom: 10px; }
.prev-card p, .prev-card li { font-size: 0.91rem; line-height: 1.73; color: var(--text-muted); }
.prev-card ul { padding-left: 1.1em; }
.prev-card li { margin-bottom: 4px; }

/* ━━━━━━━━━━━━━━━━ DANGER BAND ━━━━━━━━━━━━━━━━ */
.danger-band {
  margin: 64px 0; padding: 30px 32px;
  background: rgba(240,80,32,0.08);
  border: 1px solid rgba(240,80,32,0.3); border-radius: 14px;
  display: flex; gap: 20px; align-items: flex-start;
  opacity: 0; animation: rise 0.8s forwards;
}
.danger-icon { font-size: 2rem; flex-shrink: 0; }
.danger-text p { font-size: 0.97rem; line-height: 1.78; color: var(--text-muted); }
.danger-text strong { color: var(--danger); }

/* ━━━━━━━━━━━━━━━━ FOOTER ━━━━━━━━━━━━━━━━ */
footer {
  margin-top: 80px; padding-top: 22px;
  border-top: 1px solid rgba(64,184,224,0.14);
  text-align: center; font-family: var(--mono);
  font-size: 0.62rem; font-weight: 300; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--text-muted); opacity: 0.5;
}

/* ━━━━━━━━━━━━━━━━ ANIMATIONS ━━━━━━━━━━━━━━━━ */
@keyframes rise { from { opacity:0; transform: translateY(18px); } to { opacity:1; transform:none; } }

.causes-section   { animation-delay: 0.8s; }
.physics-section  { animation-delay: 1.0s; }
.history-section  { animation-delay: 1.2s; }
.alert-section    { animation-delay: 1.4s; }
.prev-section     { animation-delay: 1.6s; }
.danger-band      { animation-delay: 1.8s; }

/* ━━━━━━━━━━━━━━━━ RESPONSIVE ━━━━━━━━━━━━━━━━ */
@media (max-width: 720px) {
  .physics-grid { grid-template-columns: 1fr 1fr; }
  .cause-row { grid-template-columns: 40px 1fr; }
  .cause-name { border-right: none; padding-right: 0; }
  .cause-desc { display: none; }
  .hero-bottom { grid-template-columns: 1fr 1fr; }
  .hero-title { font-size: clamp(4rem, 22vw, 10rem); }
}
@media (max-width: 480px) {
  .physics-grid { grid-template-columns: 1fr; }
  .hero-bottom { grid-template-columns: 1fr; }
}