/* ============================================================
   3K Digital — Lottery Number Generator
   styles.css
   Premium dark fintech aesthetic
   ============================================================ */

/* ── Custom Fonts (Google Fonts via @import – system fallback) ── */
@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Syne:wght@600;700;800&family=DM+Sans:wght@300;400;500&display=swap');

/* ── CSS Variables ── */
:root {
  --bg-base:         #09090f;
  --bg-card:         #111118;
  --bg-section:      #16161f;
  --bg-input:        #1c1c28;
  --bg-hover:        #21212f;

  --border-subtle:   rgba(255,255,255,0.06);
  --border-mid:      rgba(255,255,255,0.12);
  --border-accent:   rgba(99,102,241,0.45);

  --accent-primary:  #6366f1;   /* indigo */
  --accent-glow:     rgba(99,102,241,0.22);
  --accent-hot:      #f97316;   /* orange */
  --accent-cold:     #38bdf8;   /* sky blue */
  --accent-balanced: #a3e635;   /* lime */
  --accent-random:   #c084fc;   /* violet */

  --ball-main:       #e8e8ff;
  --ball-special:    #fbbf24;   /* gold for Powerball/Mega Ball */
  --ball-pick:       #34d399;   /* teal for Pick 3/4 */

  --text-primary:    #f0f0f8;
  --text-secondary:  #8888aa;
  --text-muted:      #5a5a72;
  --text-accent:     #9da5ff;

  --font-display:    'Syne', 'Segoe UI', sans-serif;
  --font-body:       'DM Sans', 'Segoe UI', sans-serif;
  --font-mono:       'DM Mono', 'Courier New', monospace;

  --radius-sm:       8px;
  --radius-md:       14px;
  --radius-lg:       22px;
  --radius-xl:       30px;

  --shadow-card:     0 0 0 1px var(--border-subtle),
                     0 24px 60px rgba(0,0,0,0.55),
                     0 4px 20px rgba(0,0,0,0.35);
  --shadow-glow:     0 0 28px var(--accent-glow);
  --shadow-ball:     0 4px 18px rgba(0,0,0,0.55);

  --transition-fast: 0.15s ease;
  --transition-mid:  0.28s cubic-bezier(0.34,1.56,0.64,1);
  --transition-slow: 0.45s cubic-bezier(0.22,1,0.36,1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-base);
  background-image:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(99,102,241,0.12) 0%, transparent 70%),
    radial-gradient(ellipse 60% 40% at 80% 90%, rgba(192,132,252,0.06) 0%, transparent 60%);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.65;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ── Header ── */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
  border-bottom: 1px solid var(--border-subtle);
  backdrop-filter: blur(12px);
  background: rgba(9,9,15,0.80);
  position: sticky;
  top: 0;
  z-index: 100;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  text-decoration: none;
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: 0.03em;
  border: 1px solid var(--border-subtle);
  padding: 7px 14px;
  border-radius: 50px;
  transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

.back-link:hover {
  color: var(--text-primary);
  border-color: var(--border-mid);
  background: var(--bg-hover);
}

.back-arrow {
  font-size: 1.05em;
  line-height: 1;
}

.brand-mark {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-secondary);
  letter-spacing: -0.01em;
}

.brand-mark span {
  color: var(--accent-primary);
  margin-left: 1px;
}

/* ── Main Wrapper ── */
.main-wrapper {
  max-width: 760px;
  margin: 0 auto;
  padding: 60px 24px 80px;
}

/* ── Hero ── */
.hero {
  text-align: center;
  margin-bottom: 48px;
}

.hero-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-primary);
  background: var(--accent-glow);
  border: 1px solid var(--border-accent);
  padding: 5px 14px;
  border-radius: 50px;
  margin-bottom: 20px;
}

h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.hero-sub {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 300;
  max-width: 420px;
  margin: 0 auto;
}

/* ── Tool Card ── */
.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  margin-bottom: 56px;
}

/* ── Card Sections ── */
.card-section {
  padding: 32px 36px;
}

.card-divider {
  height: 1px;
  background: var(--border-subtle);
  margin: 0 36px;
}

.section-label {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text-primary);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.step-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--accent-primary);
  background: var(--accent-glow);
  border: 1px solid var(--border-accent);
  padding: 2px 8px;
  border-radius: 4px;
  letter-spacing: 0.08em;
}

.section-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 18px;
  margin-top: -10px;
  font-weight: 400;
}

/* ── Select / Dropdown ── */
.select-wrapper {
  position: relative;
}

.select-wrapper select {
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
  background: var(--bg-input);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 400;
  padding: 14px 42px 14px 18px;
  cursor: pointer;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.select-wrapper select:hover,
.select-wrapper select:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.select-icon {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.7rem;
  pointer-events: none;
}

/* ── Strategy Grid ── */
.strategy-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.strategy-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  background: var(--bg-input);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  cursor: pointer;
  text-align: left;
  transition:
    border-color var(--transition-fast),
    background var(--transition-fast),
    box-shadow var(--transition-fast),
    transform var(--transition-mid);
  position: relative;
  overflow: hidden;
}

.strategy-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.strategy-btn:hover {
  border-color: var(--border-mid);
  background: var(--bg-hover);
  transform: translateY(-1px);
}

.strategy-btn:active {
  transform: translateY(0px) scale(0.98);
}

/* Active state per strategy */
.strategy-btn.active[data-strategy="random"]   { border-color: var(--accent-random);   box-shadow: 0 0 0 1px var(--accent-random), 0 4px 20px rgba(192,132,252,0.15); }
.strategy-btn.active[data-strategy="hot"]      { border-color: var(--accent-hot);      box-shadow: 0 0 0 1px var(--accent-hot),    0 4px 20px rgba(249,115,22,0.15); }
.strategy-btn.active[data-strategy="cold"]     { border-color: var(--accent-cold);     box-shadow: 0 0 0 1px var(--accent-cold),   0 4px 20px rgba(56,189,248,0.15); }
.strategy-btn.active[data-strategy="balanced"] { border-color: var(--accent-balanced); box-shadow: 0 0 0 1px var(--accent-balanced),0 4px 20px rgba(163,230,53,0.15); }

.strategy-icon {
  font-size: 1rem;
  line-height: 1;
  margin-bottom: 2px;
}

.strategy-btn[data-strategy="random"]   .strategy-icon { color: var(--accent-random); }
.strategy-btn[data-strategy="hot"]      .strategy-icon { color: var(--accent-hot); }
.strategy-btn[data-strategy="cold"]     .strategy-icon { color: var(--accent-cold); }
.strategy-btn[data-strategy="balanced"] .strategy-icon { color: var(--accent-balanced); }

.strategy-name {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.01em;
}

.strategy-desc {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 400;
}

/* ── Generate Button ── */
.generate-section {
  background: var(--bg-section);
}

.generate-btn {
  width: 100%;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: var(--accent-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  padding: 18px 24px;
  cursor: pointer;
  overflow: hidden;
  transition:
    background var(--transition-fast),
    transform var(--transition-mid),
    box-shadow var(--transition-fast);
  box-shadow: 0 4px 24px rgba(99,102,241,0.35), 0 1px 0 rgba(255,255,255,0.1) inset;
}

.generate-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.08) 0%, transparent 60%);
  pointer-events: none;
}

.generate-btn:hover:not(:disabled) {
  background: #7577f5;
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(99,102,241,0.45), 0 1px 0 rgba(255,255,255,0.1) inset;
}

.generate-btn:active:not(:disabled) {
  transform: translateY(0) scale(0.98);
  box-shadow: 0 2px 12px rgba(99,102,241,0.25);
}

.generate-btn:disabled {
  background: #3a3a55;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.btn-text {
  position: relative;
  z-index: 1;
}

/* Spinner */
.btn-loader {
  display: none;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  position: relative;
  z-index: 1;
}

.generate-btn.loading .btn-loader { display: block; }
.generate-btn.loading .btn-text   { opacity: 0.6; }

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

/* ── Results Area ── */
.results-wrapper {
  padding: 32px 36px 28px;
  border-top: 1px solid var(--border-subtle);
  text-align: center;
  animation: fadeSlideIn 0.4s var(--transition-slow) both;
}

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.results-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 22px;
}

/* ── Balls Container ── */
.balls-container {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 24px;
}

/* ── Number Ball ── */
.ball {
  width: 62px;
  height: 62px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  box-shadow: var(--shadow-ball);
  list-style: none;
  position: relative;
  overflow: hidden;

  /* Pop-in animation */
  opacity: 0;
  transform: scale(0.5) translateY(10px);
  animation: ballPopIn var(--transition-mid) forwards;
}

.ball::before {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 55%;
  height: 30%;
  background: rgba(255,255,255,0.18);
  border-radius: 50%;
  filter: blur(3px);
}

@keyframes ballPopIn {
  0%   { opacity: 0; transform: scale(0.4) translateY(14px); }
  65%  { opacity: 1; transform: scale(1.1) translateY(-4px); }
  100% { opacity: 1; transform: scale(1) translateY(0); }
}

/* Ball color variants */
.ball-main {
  background: radial-gradient(circle at 38% 35%, #c8c8ff, #6366f1 80%);
  color: #fff;
}

.ball-special {
  background: radial-gradient(circle at 38% 35%, #fde68a, #f59e0b 80%);
  color: #1a0e00;
  box-shadow: 0 4px 22px rgba(245,158,11,0.4);
}

.ball-pick {
  background: radial-gradient(circle at 38% 35%, #a7f3d0, #10b981 80%);
  color: #002918;
}

/* Ball divider (shown between main numbers and special ball) */
.ball-divider {
  display: flex;
  align-items: center;
  color: var(--text-muted);
  font-size: 1.3rem;
  font-weight: 300;
  padding: 0 2px;
  align-self: center;
}

/* ── Copy Button ── */
.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-mid);
  border-radius: 50px;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 400;
  padding: 8px 20px;
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-bottom: 20px;
}

.copy-btn:hover {
  background: var(--bg-hover);
  border-color: var(--border-mid);
  color: var(--text-primary);
}

.copy-btn.copied {
  color: var(--accent-balanced);
  border-color: var(--accent-balanced);
}

/* ── Results Disclaimer ── */
.results-disclaimer {
  font-size: 0.73rem;
  color: var(--text-muted);
  font-weight: 300;
  font-style: italic;
}

/* ── Info Section (SEO) ── */
.info-section {
  margin-bottom: 60px;
}

.info-section > h2 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
  margin-bottom: 20px;
  text-align: center;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.info-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px 22px;
}

.info-card h3 {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-accent);
  margin-bottom: 10px;
  letter-spacing: 0.01em;
}

.info-card p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-weight: 300;
  line-height: 1.7;
}

.info-card strong {
  color: var(--text-primary);
  font-weight: 500;
}

/* ── Site Footer ── */
.site-footer {
  text-align: center;
  padding: 24px;
  border-top: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 300;
  line-height: 1.8;
}

.site-footer strong {
  color: var(--text-secondary);
  font-weight: 500;
}

.footer-legal {
  font-size: 0.7rem;
  opacity: 0.6;
}

/* ── Utility ── */
[hidden] { display: none !important; }

/* ── Responsive ── */
@media (max-width: 600px) {
  .site-header { padding: 14px 18px; }
  .main-wrapper { padding: 40px 16px 60px; }
  .card-section { padding: 24px 22px; }
  .card-divider { margin: 0 22px; }

  .strategy-grid {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .strategy-btn { padding: 14px 14px; }
  .strategy-name { font-size: 0.78rem; }
  .strategy-desc { font-size: 0.68rem; }

  .ball { width: 54px; height: 54px; font-size: 1rem; }
  .balls-container { gap: 10px; }

  .results-wrapper { padding: 24px 22px 20px; }

  .info-grid { grid-template-columns: 1fr; }

  h1 { font-size: 1.9rem; }
}

@media (max-width: 380px) {
  .strategy-grid { grid-template-columns: 1fr; }
  .ball { width: 50px; height: 50px; font-size: 0.95rem; }
}