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

:root {
  --navy:   #0D1B2A;
  --navy2:  #162336;
  --gold:   #C9A84C;
  --gold2:  #E8C96A;
  --mist:   #F0F4F8;
  --slate:  #8B98A9;
  --white:  #FFFFFF;
  --card-bg: rgba(255,255,255,0.04);
  --border:  rgba(201,168,76,0.18);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--navy);
  color: var(--mist);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

/* Dimple SVG background */
#dimple-bg {
  position: absolute; inset: 0;
  opacity: .13; pointer-events: none;
  z-index: 1;
  width: 100%;
  height: 100%;
}

/* ── HEADER / NAV ── */
header {
  padding: 2rem 3rem 1rem;
  z-index: 10;
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}
.header-logo {
  font-family: 'Noto Serif KR', serif;
  font-size: 1.2rem;
  letter-spacing: .08em;
  color: var(--gold);
  font-weight: 600;
}
.header-logo span {
  font-weight: 300;
  color: var(--white);
}

/* ── MAIN CONTENT ── */
main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.5rem 4rem;
  z-index: 10;
  position: relative;
  width: 100%;
}

.lotto-card {
  width: 100%;
  max-width: 760px;
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.4);
  text-align: center;
  border-radius: 12px;
  position: relative;
  overflow: hidden;
  padding: 3rem 2.5rem;
}

.lotto-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

.lotto-header {
  margin-bottom: 2.5rem;
}

.lotto-eyebrow {
  font-size: .75rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.8rem;
}

.lotto-title {
  font-family: 'Noto Serif KR', serif;
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 300;
  color: var(--white);
  margin-bottom: 0.8rem;
  letter-spacing: -0.02em;
}
.lotto-title span {
  color: var(--gold);
  font-weight: 600;
}

.lotto-subtitle {
  max-width: 500px;
  margin: 0 auto;
  font-size: 0.9rem;
  color: var(--slate);
  font-weight: 300;
  line-height: 1.6;
}

/* ── LOTTO BOARD & ROWS ── */
.lotto-board {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  margin-bottom: 3rem;
}

.lotto-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 1.8rem;
  background: rgba(255, 255, 255, 0.015);
  border: 1px solid rgba(255, 255, 255, 0.03);
  border-radius: 8px;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.lotto-row:hover {
  background: rgba(201, 168, 76, 0.03);
  border-color: rgba(201, 168, 76, 0.25);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}

.row-info {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.2rem;
  width: 4rem;
  flex-shrink: 0;
}

.row-index {
  font-family: 'Noto Serif KR', serif;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: 0.05em;
}

.row-badge {
  font-size: 0.65rem;
  letter-spacing: 0.05em;
  color: var(--slate);
  text-transform: uppercase;
}

.row-balls-container {
  display: flex;
  gap: 0.75rem;
  flex: 1;
  justify-content: flex-end;
  align-items: center;
}

/* Ball styling */
.ball-slot {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px dashed rgba(139, 152, 169, 0.2);
  background: rgba(255, 255, 255, 0.005);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(139, 152, 169, 0.15);
  font-size: 0.85rem;
  font-weight: 300;
  transition: all 0.3s;
}

.lotto-ball {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 1.05rem;
  color: #FFFFFF;
  text-shadow: 0 1px 2px rgba(0,0,0,0.5);
  box-shadow: 0 4px 10px rgba(0,0,0,0.45), inset 0 -4px 6px rgba(0,0,0,0.3), inset 0 4px 6px rgba(255,255,255,0.4);
  position: relative;
  animation: ballPop 0.45s cubic-bezier(0.175, 0.885, 0.32, 1.275) both;
}

/* Highlight glare for 3D sphere look */
.lotto-ball::after {
  content: '';
  position: absolute;
  top: 4px; left: 8px; right: 8px; height: 10px;
  background: linear-gradient(to bottom, rgba(255,255,255,0.4), transparent);
  border-radius: 50% 50% 10% 10%;
}

/* Color scheme matching Korea Lotto ranges, optimized for design aesthetic */
.ball-range-1 { background: radial-gradient(circle at 35% 35%, #F4D35E, #C5A028); color: #0D1B2A; text-shadow: 0 1px 1px rgba(255,255,255,0.4); } /* 1-10 (Gold/Yellow) */
.ball-range-2 { background: radial-gradient(circle at 35% 35%, #4A90E2, #1C5599); } /* 11-20 (Blue) */
.ball-range-3 { background: radial-gradient(circle at 35% 35%, #E25A5A, #9E1F1F); } /* 21-30 (Red) */
.ball-range-4 { background: radial-gradient(circle at 35% 35%, #9FA8B8, #5E6775); } /* 31-40 (Gray) */
.ball-range-5 { background: radial-gradient(circle at 35% 35%, #52D689, #1E8E50); } /* 41-45 (Green) */

@keyframes ballPop {
  0% { transform: scale(0.3) rotate(-180deg); opacity: 0; }
  100% { transform: scale(1) rotate(0); opacity: 1; }
}

/* ── ACTION BUTTON ── */
.action-container {
  margin-top: 1.5rem;
}

.btn-generate {
  display: inline-block;
  background: transparent;
  color: var(--gold);
  border: 1px solid var(--gold);
  padding: 1.1rem 3.5rem;
  font-size: 0.95rem;
  font-family: 'Noto Serif KR', serif;
  font-weight: 600;
  letter-spacing: 0.15em;
  cursor: pointer;
  transition: all 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
  position: relative;
  z-index: 5;
  text-transform: uppercase;
  box-shadow: 0 0 0 rgba(201,168,76,0);
  border-radius: 4px;
}

.btn-generate:hover {
  background: var(--gold);
  color: var(--navy);
  box-shadow: 0 0 25px rgba(201,168,76,0.35);
  transform: translateY(-3px);
}

.btn-generate:active {
  transform: translateY(-1px);
}

/* ── ANALYTICS PANEL ── */
.analytics-panel {
  margin-top: 2.5rem;
  background: rgba(255,255,255,0.015);
  border: 1px solid var(--border);
  padding: 1.8rem;
  border-radius: 8px;
  text-align: left;
  opacity: 0;
  transform: translateY(15px);
  transition: opacity 0.6s cubic-bezier(0.25, 0.8, 0.25, 1), transform 0.6s cubic-bezier(0.25, 0.8, 0.25, 1);
  pointer-events: none;
}

.analytics-panel.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.analytics-title {
  font-family: 'Noto Serif KR', serif;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gold);
  margin-bottom: 1.2rem;
  border-bottom: 1px solid rgba(201,168,76,0.12);
  padding-bottom: 0.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.analytics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1.5rem;
}

.metric-item {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.metric-label {
  font-size: 0.75rem;
  color: var(--slate);
  letter-spacing: 0.02em;
}

.metric-value {
  font-size: 1.1rem;
  color: var(--white);
  font-weight: 500;
}

.metric-desc {
  font-size: 0.65rem;
  color: var(--slate);
  opacity: 0.8;
}

/* ── CARD ACTIONS (COPY, ETC.) ── */
.card-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 2rem;
  opacity: 0;
  transition: opacity 0.5s ease;
}

.card-actions.visible {
  opacity: 1;
}

.btn-secondary {
  background: rgba(255,255,255,0.02);
  color: var(--slate);
  border: 1px solid rgba(255,255,255,0.1);
  padding: 0.6rem 1.6rem;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.25s;
  letter-spacing: 0.05em;
  border-radius: 4px;
}

.btn-secondary:hover {
  border-color: var(--gold);
  color: var(--gold);
  background: rgba(201,168,76,0.04);
}

/* ── FOOTER ── */
footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 3rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
  color: var(--slate);
  font-size: .8rem;
  z-index: 10;
  position: relative;
}
footer .footer-name {
  font-family: 'Noto Serif KR', serif;
  color: var(--gold);
  font-size: .9rem;
  font-weight: 600;
}

/* ── TOAST NOTIFICATION ── */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--navy2);
  border: 1px solid var(--gold);
  color: var(--gold);
  padding: 0.8rem 2.2rem;
  border-radius: 4px;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  z-index: 1000;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.5);
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ── RESPONSIVE ── */
@media (max-width: 700px) {
  header { padding: 1.5rem 1.5rem 0.5rem; }
  main { padding: 1rem 1rem 3rem; }
  .lotto-card { padding: 2.2rem 1.5rem; }
  .lotto-row {
    flex-direction: column;
    align-items: stretch;
    gap: 0.8rem;
    padding: 1.2rem;
  }
  .row-info {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    padding-bottom: 0.4rem;
  }
  .row-balls-container {
    justify-content: space-between;
  }
  .ball-slot, .lotto-ball {
    width: 38px;
    height: 38px;
    font-size: 0.95rem;
  }
  footer { flex-direction: column; gap: 1rem; text-align: center; padding: 2rem 1.5rem; }
}