/* ═══════════════════════════════════════════════
   Titanic Survival Predictor — style.css
   Sunny ocean day theme
═══════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,700;0,900;1,400&family=DM+Mono:wght@300;400;500&display=swap');

/* ── Reset & Base ───────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --sky-top:      #ffe066;
  --sky-mid:      #87ceeb;
  --sky-deep:     #1976a8;
  --ocean-blue:   #1565c0;
  --card-bg:      rgba(255, 252, 245, 0.90);
  --card-border:  rgba(255, 180, 50, 0.35);
  --input-bg:     rgba(255, 250, 240, 0.95);
  --text-dark:    #1a2e45;
  --text-mid:     #3a5a7a;
  --text-muted:   #5a7a9a;
  --accent:       #e07b00;
  --accent-light: #ff8c00;
  --border:       rgba(30, 80, 140, 0.18);
  --survive:      #27ae60;
  --perish:       #e74c3c;
  --shadow:       0 30px 80px rgba(0, 60, 120, 0.20);
}

body {
  font-family: 'DM Mono', monospace;
  min-height: 100vh;
  overflow-x: hidden;
  color: var(--text-dark);
}

/* ── Sky background ─────────────────────────── */
.sky-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  background: linear-gradient(
    180deg,
    #ffe066 0%,
    #ffb347 8%,
    #87ceeb 32%,
    #4fb6e8 58%,
    #2196c4 78%,
    #1565c0 100%
  );
}

/* ── Sun ──────────────────────────────────────── */
.sun {
  position: fixed;
  top: -55px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 90px;
  z-index: 1;
  pointer-events: none;
  filter: drop-shadow(0 0 30px #ffe066) drop-shadow(0 0 60px #ffb347);
  animation: rotateSun 20s linear infinite, sunPulse 4s ease-in-out infinite alternate;
}

@keyframes rotateSun  { to { transform: translateX(-50%) rotate(360deg); } }
@keyframes sunPulse   { 0% { filter: brightness(1) drop-shadow(0 0 30px #ffe066); }
                        100% { filter: brightness(1.2) drop-shadow(0 0 60px #ffcc00); } }

/* ── Clouds ───────────────────────────────────── */
.clouds { position: fixed; inset: 0; pointer-events: none; z-index: 1; }

.cloud {
  position: absolute;
  font-size: 64px;
  opacity: 0.75;
  filter: drop-shadow(0 4px 12px rgba(255,255,255,0.4));
  animation: driftCloud linear infinite;
  white-space: nowrap;
}

.cloud-1 { top:  9%; font-size: 78px; animation-duration: 32s; animation-delay: 0s;   }
.cloud-2 { top: 22%; font-size: 52px; animation-duration: 48s; animation-delay: -14s; }
.cloud-3 { top:  6%; font-size: 46px; animation-duration: 40s; animation-delay: -9s;  }
.cloud-4 { top: 34%; font-size: 58px; animation-duration: 55s; animation-delay: -26s; }

@keyframes driftCloud {
  from { transform: translateX(-150px); }
  to   { transform: translateX(calc(100vw + 150px)); }
}

/* ── Waves ────────────────────────────────────── */
.wave-wrap {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: 110px;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}

.wave {
  position: absolute;
  bottom: 0;
  width: 200%;
  height: 80px;
  background-repeat: repeat-x;
}

.wave-1 {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 80'%3E%3Cpath fill='%231565c0' fill-opacity='0.55' d='M0,40 C180,80 360,0 540,40 C720,80 900,0 1080,40 C1260,80 1440,20 1440,20 L1440,80 L0,80 Z'/%3E%3C/svg%3E");
  background-size: 720px 80px;
  animation: wave1 8s linear infinite;
}

.wave-2 {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 80'%3E%3Cpath fill='%230d47a1' fill-opacity='0.75' d='M0,60 C200,20 400,70 600,50 C800,30 1000,70 1200,45 C1300,35 1380,60 1440,55 L1440,80 L0,80 Z'/%3E%3C/svg%3E");
  background-size: 960px 80px;
  animation: wave2 12s linear infinite;
}

@keyframes wave1 { from { transform: translateX(0);    } to { transform: translateX(-50%); } }
@keyframes wave2 { from { transform: translateX(-50%); } to { transform: translateX(0);    } }

/* ── Page wrapper ─────────────────────────────── */
.page {
  position: relative;
  z-index: 2;
  max-width: 900px;
  margin: 0 auto;
  padding: 50px 24px 160px;
}

/* ── Header ───────────────────────────────────── */
.header {
  text-align: center;
  margin-bottom: 44px;
  animation: fadeDown 0.8s ease both;
}

@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-30px); }
  to   { opacity: 1; transform: translateY(0);     }
}

.ship-emoji {
  display: block;
  font-size: 54px;
  margin-bottom: 14px;
  filter: drop-shadow(0 0 20px rgba(255,200,50,0.6));
  animation: floatShip 3s ease-in-out infinite;
}

@keyframes floatShip {
  0%,100% { transform: translateY(0px) rotate(-2deg); }
  50%      { transform: translateY(-9px) rotate(2deg); }
}

h1 {
  font-family: 'Playfair Display', serif;
  font-size: clamp(30px, 6vw, 54px);
  font-weight: 900;
  color: #fff;
  text-shadow: 0 2px 16px rgba(0,60,120,0.3), 0 0 40px rgba(255,200,50,0.2);
  line-height: 1.1;
  letter-spacing: -1px;
}

h1 em {
  color: #ff8c00;
  font-style: italic;
  text-shadow: 0 0 20px rgba(255,140,0,0.5);
}

.subtitle {
  margin-top: 10px;
  font-size: 12px;
  color: rgba(255,255,255,0.88);
  letter-spacing: 3px;
  text-transform: uppercase;
  text-shadow: 0 1px 4px rgba(0,60,120,0.3);
}

.divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 18px auto 0;
  max-width: 300px;
}

.divider-line   { flex:1; height:1px; background: linear-gradient(to right, transparent, rgba(255,255,255,0.7), transparent); }
.divider-diamond{ width:6px; height:6px; background:#fff; transform:rotate(45deg); }

/* ── Card ─────────────────────────────────────── */
.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 4px;
  padding: 40px;
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow), 0 2px 0 rgba(255,200,50,0.25), inset 0 1px 0 rgba(255,255,255,0.9);
  animation: fadeUp 0.8s ease 0.2s both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0);    }
}

/* ── Section labels ───────────────────────────── */
.section-label {
  font-size: 10px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: rgba(224,123,0,0.22);
}

/* ── Grid ─────────────────────────────────────── */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

label {
  font-size: 10px;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* ── Inputs / Selects ─────────────────────────── */
input, select {
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 12px 14px;
  font-family: 'DM Mono', monospace;
  font-size: 14px;
  color: var(--text-dark);
  outline: none;
  transition: border-color .2s, box-shadow .2s;
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
}

select {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%235a7a9a' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-color: var(--input-bg);
  padding-right: 36px;
}

select option { background: #fff8ee; color: var(--text-dark); }

input:focus, select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(224,123,0,0.14);
}

/* ── Range sliders ────────────────────────────── */
input[type="range"] {
  padding: 4px 0;
  background: transparent;
  border: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: 2px;
  background: #b8d4e8;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: -7px;
  box-shadow: 0 0 8px rgba(224,123,0,0.35);
  cursor: pointer;
}

input[type="range"]:focus { box-shadow: none; border: none; background: transparent; }

.range-val {
  font-size: 14px;
  font-weight: 500;
  color: var(--accent);
  display: inline-block;
}

/* ── Toggle button groups ─────────────────────── */
.toggle-group {
  display: flex;
  gap: 1px;
  border: 1px solid var(--border);
  border-radius: 3px;
  overflow: hidden;
}

.toggle-btn {
  flex: 1;
  padding: 11px 6px;
  background: var(--input-bg);
  border: none;
  color: var(--text-muted);
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all .2s;
  text-transform: uppercase;
}

.toggle-btn:hover { background: rgba(79,182,232,0.2); color: var(--text-dark); }

.toggle-btn.active {
  background: #4fb6e8;
  color: #fff;
  font-weight: 500;
}

/* ── Model selector ───────────────────────────── */
.model-selector {
  display: flex;
  gap: 12px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.model-opt {
  flex: 1;
  min-width: 160px;
  padding: 14px 16px;
  border: 2px solid var(--border);
  border-radius: 4px;
  background: var(--input-bg);
  cursor: pointer;
  transition: all .2s;
  text-align: center;
}

.model-opt:hover { border-color: #4fb6e8; background: rgba(79,182,232,0.08); }

.model-opt.active {
  border-color: var(--accent);
  background: rgba(224,123,0,0.07);
}

.model-opt .model-name {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-dark);
  display: block;
}

.model-opt .model-desc {
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 1px;
  margin-top: 3px;
  display: block;
}

/* ── Predict button ───────────────────────────── */
.predict-btn {
  width: 100%;
  padding: 18px;
  background: linear-gradient(135deg, var(--accent-light) 0%, var(--accent) 100%);
  border: none;
  border-radius: 3px;
  font-family: 'Playfair Display', serif;
  font-size: 19px;
  font-weight: 700;
  font-style: italic;
  color: #fff;
  cursor: pointer;
  letter-spacing: .5px;
  transition: all .3s;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(224,123,0,0.3);
}

.predict-btn::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.22), transparent);
  transition: left .5s;
}

.predict-btn:hover::before { left: 100%; }

.predict-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(224,123,0,0.4);
}

.predict-btn:active  { transform: translateY(0); }
.predict-btn:disabled { opacity: .6; cursor: not-allowed; transform: none; }

/* ── Spinner ──────────────────────────────────── */
.spinner {
  display: inline-block;
  width: 15px; height: 15px;
  border: 2px solid rgba(255,255,255,0.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .6s linear infinite;
  vertical-align: middle;
  margin-right: 8px;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── Error ────────────────────────────────────── */
.error-msg {
  display: none;
  color: var(--perish);
  font-size: 12px;
  padding: 12px 16px;
  background: rgba(231,76,60,0.08);
  border: 1px solid rgba(231,76,60,0.3);
  border-radius: 3px;
  margin-top: 14px;
}

/* ── Result panel ─────────────────────────────── */
.result-panel {
  display: none;
  margin-top: 32px;
  border-radius: 4px;
  overflow: hidden;
  animation: resultReveal .6s cubic-bezier(.34,1.56,.64,1) both;
}

@keyframes resultReveal {
  from { opacity:0; transform: scale(.95) translateY(20px); }
  to   { opacity:1; transform: scale(1)  translateY(0);     }
}

.result-panel.survived { border: 1px solid rgba(39,174,96,.45); background: rgba(26,107,60,.12); }
.result-panel.perished { border: 1px solid rgba(231,76,60,.45); background: rgba(139,26,26,.12); }

.result-header {
  padding: 28px 32px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.result-icon {
  font-size: 50px;
  flex-shrink: 0;
  animation: iconBounce .6s ease .3s both;
}

@keyframes iconBounce {
  0%   { opacity:0; transform: scale(0) rotate(-20deg); }
  70%  { transform: scale(1.1) rotate(5deg); }
  100% { opacity:1; transform: scale(1) rotate(0); }
}

.verdict {
  font-family: 'Playfair Display', serif;
  font-size: 26px;
  font-weight: 900;
  line-height: 1;
}

.survived .verdict { color: var(--survive); }
.perished .verdict { color: var(--perish);  }

.verdict-sub {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 6px;
  letter-spacing: 2px;
  text-transform: uppercase;
}

/* Probability bar */
.prob-section { padding: 0 32px 28px; }

.prob-header {
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.prob-track {
  height: 8px;
  background: rgba(10,22,40,.1);
  border-radius: 4px;
  overflow: hidden;
}

.prob-fill {
  height: 100%;
  border-radius: 4px;
  width: 0%;
  transition: width 1.1s cubic-bezier(.34,1.56,.64,1);
}

.survived .prob-fill { background: linear-gradient(to right, #1a6b3c, #27ae60, #2ecc71); }
.perished .prob-fill { background: linear-gradient(to right, #8b1a1a, #c0392b, #e74c3c); }

.prob-pct {
  text-align: right;
  margin-top: 6px;
  font-size: 30px;
  font-weight: 500;
}

.survived .prob-pct { color: var(--survive); }
.perished .prob-pct { color: var(--perish);  }

/* Badges */
.badges { padding: 0 32px 24px; display: flex; flex-wrap: wrap; gap: 4px; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 11px;
  border-radius: 3px;
  font-size: 10px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  background: rgba(255,250,240,.75);
  border: 1px solid var(--border);
  color: var(--text-muted);
}

/* ── Historical note ──────────────────────────── */
.note {
  margin-top: 24px;
  padding: 20px 24px;
  background: rgba(255,255,255,.6);
  border-left: 3px solid var(--accent-light);
  font-size: 12px;
  color: var(--text-mid);
  line-height: 1.8;
  font-style: italic;
  backdrop-filter: blur(10px);
  animation: fadeUp .8s ease .5s both;
}

.note strong { color: var(--text-dark); font-style: normal; }

/* ── Footer ───────────────────────────────────── */
footer {
  text-align: center;
  margin-top: 32px;
  font-size: 11px;
  color: rgba(255,255,255,.7);
  letter-spacing: 1.5px;
  animation: fadeUp .8s ease .7s both;
}

/* ── Responsive ───────────────────────────────── */
@media (max-width: 600px) {
  .card { padding: 24px 18px; }
  .result-header { padding: 20px 18px; }
  .prob-section, .badges { padding-left: 18px; padding-right: 18px; }
  .result-icon { font-size: 38px; }
  .verdict { font-size: 20px; }
  .model-selector { flex-direction: column; }
}