*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0a1628;
  --surface: #0f1f3d;
  --water-deep: #0066cc;
  --water-mid: #0099ff;
  --water-light: #66ccff;
  --water-foam: #99ddff;
  --accent: #00e5ff;
  --text: #e8f4fd;
  --text-muted: #6a9fc0;
  --glass: rgba(0, 153, 255, 0.08);
  --glass-border: rgba(0, 200, 255, 0.15);
}

body {
  font-family: 'DM Mono', monospace;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1rem 4rem;
  overflow-x: hidden;
  position: relative;
}

/* Animated background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 20% 80%, rgba(0, 80, 180, 0.3) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 20%, rgba(0, 150, 220, 0.15) 0%, transparent 60%),
    var(--bg);
  z-index: -1;
}

/* Floating bubbles */
.bubbles { position: fixed; inset: 0; pointer-events: none; z-index: 0; overflow: hidden; }
.bubble {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(102, 204, 255, 0.15), rgba(0, 150, 255, 0.05));
  border: 1px solid rgba(102, 204, 255, 0.08);
  animation: float linear infinite;
}
@keyframes float {
  0% { transform: translateY(110vh) scale(0); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 0.5; }
  100% { transform: translateY(-10vh) scale(1); opacity: 0; }
}

/* Header */
header { text-align: center; margin-bottom: 2.5rem; position: relative; z-index: 1; }
.logo {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(2.8rem, 8vw, 4.5rem);
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--water-foam), var(--water-mid), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}
.logo em { font-style: italic; }
.tagline {
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

/* Date */
.date-display {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 2rem;
  z-index: 1;
  position: relative;
}

/* Main vessel */
.vessel-container {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 2rem;
}

.vessel-wrap {
  position: relative;
  width: 160px;
  height: 260px;
}

/* Glass vessel SVG-style shape */
.vessel {
  width: 100%;
  height: 100%;
  border: 2px solid var(--glass-border);
  border-radius: 12px 12px 20px 20px;
  background: rgba(0, 30, 70, 0.4);
  backdrop-filter: blur(8px);
  overflow: hidden;
  position: relative;
  box-shadow:
    inset 0 0 30px rgba(0, 100, 200, 0.1),
    0 0 40px rgba(0, 150, 255, 0.08),
    0 20px 60px rgba(0, 0, 20, 0.5);
}

/* Water fill */
.water-fill {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(180deg,
    rgba(0, 180, 255, 0.6) 0%,
    rgba(0, 120, 220, 0.8) 40%,
    rgba(0, 80, 180, 0.9) 100%);
  transition: height 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
  will-change: height;
}

/* Wave animation */
.wave {
  position: absolute;
  top: -12px;
  left: -30px;
  right: -30px;
  height: 24px;
  background: rgba(102, 210, 255, 0.4);
  border-radius: 50%;
  animation: wave 2.5s ease-in-out infinite;
}
.wave2 {
  animation: wave 3.2s ease-in-out infinite reverse;
  opacity: 0.6;
}
@keyframes wave {
  0%, 100% { transform: scaleX(1) translateX(0); }
  50% { transform: scaleX(1.1) translateX(10px); }
}

/* Shimmer on vessel */
.vessel::after {
  content: '';
  position: absolute;
  top: 0; left: 10%; width: 20%; bottom: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.04) 0%, transparent 100%);
  border-radius: 0 0 4px 4px;
}

/* Percentage */
.pct-label {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 2rem;
  font-weight: 500;
  color: white;
  text-shadow: 0 0 20px rgba(0, 200, 255, 0.8);
  z-index: 3;
  pointer-events: none;
  transition: all 0.3s;
}

/* Goal marker lines */
.markers {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
}
.marker-line {
  position: absolute;
  left: 4px;
  right: 4px;
  height: 1px;
  background: rgba(102, 204, 255, 0.2);
  display: flex;
  align-items: center;
}
.marker-line span {
  font-size: 0.55rem;
  color: rgba(102, 204, 255, 0.5);
  letter-spacing: 0.1em;
  margin-left: 4px;
  transform: translateY(-8px);
}

/* Stats row */
.stats-row {
  display: flex;
  gap: 2rem;
  margin-top: 1.5rem;
  z-index: 1;
  position: relative;
}
.stat {
  text-align: center;
}
.stat-val {
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--accent);
  line-height: 1;
}
.stat-label {
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-top: 0.3rem;
}

/* Quick add buttons */
.quick-add {
  z-index: 1;
  position: relative;
  width: 100%;
  max-width: 360px;
  margin-bottom: 1.5rem;
}
.quick-add h3 {
  font-size: 0.6rem;
  letter-spacing: 0.25em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 1rem;
  text-align: center;
}
.btn-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
}
.add-btn {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: var(--water-light);
  padding: 0.75rem 0.5rem;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  backdrop-filter: blur(4px);
}
.add-btn:hover {
  background: rgba(0, 153, 255, 0.15);
  border-color: rgba(0, 200, 255, 0.35);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 150, 255, 0.2);
}
.add-btn:active { transform: translateY(0) scale(0.97); }
.btn-icon { font-size: 1.3rem; }
.btn-ml { font-size: 0.7rem; font-weight: 500; letter-spacing: 0.05em; }
.btn-label { font-size: 0.55rem; color: var(--text-muted); letter-spacing: 0.1em; }

/* Custom input */
.custom-row {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.75rem;
  z-index: 1;
  position: relative;
  width: 100%;
  max-width: 360px;
}
.custom-input {
  flex: 1;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: var(--text);
  padding: 0.75rem 1rem;
  border-radius: 12px;
  font-family: 'DM Mono', monospace;
  font-size: 0.85rem;
  outline: none;
  transition: border-color 0.2s;
}
.custom-input::placeholder { color: var(--text-muted); }
.custom-input:focus { border-color: var(--accent); }
.add-custom-btn {
  background: linear-gradient(135deg, var(--water-deep), var(--water-mid));
  border: none;
  color: white;
  padding: 0.75rem 1.25rem;
  border-radius: 12px;
  font-family: 'DM Mono', monospace;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}
.add-custom-btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 150, 255, 0.3);
}

/* Goal setting */
.goal-section {
  z-index: 1;
  position: relative;
  width: 100%;
  max-width: 360px;
  margin-bottom: 1.5rem;
}
.goal-section h3 {
  font-size: 0.6rem;
  letter-spacing: 0.25em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
.goal-row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}
.goal-options {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.goal-btn {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: var(--text-muted);
  padding: 0.4rem 0.75rem;
  border-radius: 8px;
  cursor: pointer;
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  transition: all 0.2s;
}
.goal-btn.active, .goal-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(0, 229, 255, 0.08);
}

/* History log */
.history-section {
  z-index: 1;
  position: relative;
  width: 100%;
  max-width: 360px;
}
.history-section h3 {
  font-size: 0.6rem;
  letter-spacing: 0.25em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
.log-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-height: 220px;
  overflow-y: auto;
  padding-right: 0.25rem;
}
.log-list::-webkit-scrollbar { width: 3px; }
.log-list::-webkit-scrollbar-track { background: transparent; }
.log-list::-webkit-scrollbar-thumb { background: var(--glass-border); border-radius: 2px; }
.log-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  padding: 0.6rem 0.9rem;
  animation: slideIn 0.3s ease;
}
@keyframes slideIn {
  from { opacity: 0; transform: translateX(-10px); }
  to { opacity: 1; transform: translateX(0); }
}
.log-amount { font-size: 0.85rem; font-weight: 500; color: var(--water-light); }
.log-time { font-size: 0.65rem; color: var(--text-muted); }
.log-delete {
  background: none; border: none; color: rgba(255,100,100,0.4);
  cursor: pointer; font-size: 0.8rem; transition: color 0.2s;
  padding: 0 0.2rem;
}
.log-delete:hover { color: rgba(255,100,100,0.8); }

.empty-log {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.7rem;
  padding: 2rem;
  letter-spacing: 0.1em;
}

/* Reset button */
.reset-btn {
  background: none;
  border: 1px solid rgba(255,100,100,0.2);
  color: rgba(255,150,150,0.5);
  padding: 0.5rem 1.25rem;
  border-radius: 8px;
  font-family: 'DM Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  cursor: pointer;
  margin-top: 1rem;
  z-index: 1;
  position: relative;
  transition: all 0.2s;
}
.reset-btn:hover { border-color: rgba(255,100,100,0.5); color: rgba(255,150,150,0.9); }

/* Celebration */
.celebration {
  position: fixed;
  top: 0; left: 0; right: 0;
  padding: 1rem;
  background: linear-gradient(135deg, rgba(0, 200, 100, 0.9), rgba(0, 150, 200, 0.9));
  text-align: center;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  transform: translateY(-100%);
  transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
  z-index: 100;
  border-bottom: 1px solid rgba(255,255,255,0.2);
}
.celebration.show { transform: translateY(0); }

/* Divider */
.divider {
  width: 100%;
  max-width: 360px;
  height: 1px;
  background: var(--glass-border);
  margin: 1.5rem 0;
  z-index: 1;
  position: relative;
}

/* Streak */
.streak-badge {
  z-index: 1;
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 0.4rem 1rem;
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}
.streak-fire { font-size: 1rem; }