/* ============================================================
   VÒNG QUAY MAY MẮN - Main Styles
   Theme: Lễ hội vàng rực - Golden Celebration
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Baloo+2:wght@400;600;700;800&family=Nunito:wght@400;600;700;800&display=swap');

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

:root {
  /* Golden Celebration Palette */
  --gold-deep:    #B8860B;
  --gold-main:    #FFD700;
  --gold-light:   #FFF176;
  --gold-glow:    rgba(255, 215, 0, 0.35);
  --blue-deep:    #0D1B4B;
  --blue-main:    #1A3A8A;
  --blue-mid:     #2563EB;
  --blue-light:   #93C5FD;
  --white:        #FFFFFF;
  --cream:        #FFFDF0;
  --success:      #16A34A;
  --danger:       #DC2626;
  --warn:         #D97706;
  --text-dark:    #0D1B4B;
  --text-mid:     #374151;
  --shadow-gold:  0 4px 24px rgba(255,215,0,0.4);
  --shadow-blue:  0 4px 24px rgba(26,58,138,0.25);

  --font-display: 'Baloo 2', cursive;
  --font-body:    'Nunito', sans-serif;

  --radius-sm:    8px;
  --radius-md:    16px;
  --radius-lg:    24px;
  --radius-xl:    32px;
}

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

body {
  font-family: var(--font-body);
  background: var(--blue-deep);
  color: var(--white);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── STARFIELD BACKGROUND ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(255,215,0,0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(37,99,235,0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(13,27,75,0.9) 0%, transparent 100%);
  pointer-events: none;
  z-index: 0;
}

/* ── LAYOUT ── */
.page { position: relative; z-index: 1; }

.container {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  padding: 0 16px;
}

/* ── HEADER ── */
.site-header {
  text-align: center;
  padding: 28px 16px 8px;
}

.header-banner {
  display: inline-block;
  background: linear-gradient(135deg, var(--gold-main) 0%, #FFA500 50%, var(--gold-deep) 100%);
  border-radius: var(--radius-xl);
  padding: 6px 24px;
  margin-bottom: 10px;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--blue-deep);
  box-shadow: var(--shadow-gold);
}

.site-header h1 {
  font-family: var(--font-display);
  font-size: 2.1rem;
  font-weight: 800;
  line-height: 1.1;
  color: var(--gold-main);
  text-shadow: 0 2px 12px rgba(255,215,0,0.5), 0 0 40px rgba(255,215,0,0.2);
  letter-spacing: -0.5px;
}

.site-header .emoji-row {
  font-size: 1.8rem;
  margin: 6px 0;
  display: block;
  animation: float 3s ease-in-out infinite;
}

.subtitle {
  font-size: 0.92rem;
  color: var(--blue-light);
  font-weight: 600;
  margin-top: 4px;
}

/* ── FLOATING STARS ── */
.stars-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}

.star {
  position: absolute;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--gold-main);
  opacity: 0;
  animation: twinkle var(--dur, 4s) var(--delay, 0s) infinite;
}

@keyframes twinkle {
  0%, 100% { opacity: 0; transform: scale(0.5); }
  50%       { opacity: 0.7; transform: scale(1.2); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-6px); }
}

/* ── CARD ── */
.card {
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,215,0,0.2);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  margin-bottom: 20px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--gold-main);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ── FORM ── */
.form-group { margin-bottom: 16px; }

.form-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--gold-light);
  margin-bottom: 6px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.form-input {
  width: 100%;
  background: rgba(255,255,255,0.08);
  border: 2px solid rgba(255,215,0,0.25);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
  outline: none;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
  -webkit-appearance: none;
}

.form-input::placeholder { color: rgba(255,255,255,0.35); font-weight: 400; }

.form-input:focus {
  border-color: var(--gold-main);
  background: rgba(255,215,0,0.08);
  box-shadow: 0 0 0 3px rgba(255,215,0,0.15);
}

.form-input.error {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(220,38,38,0.15);
}

.form-error {
  font-size: 0.78rem;
  color: #FCA5A5;
  margin-top: 4px;
  display: none;
  font-weight: 600;
}

.form-error.show { display: block; }

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s;
  padding: 14px 24px;
  letter-spacing: 0.5px;
  text-decoration: none;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none !important;
}

.btn-primary {
  background: linear-gradient(135deg, var(--gold-main) 0%, #FFA500 100%);
  color: var(--blue-deep);
  box-shadow: var(--shadow-gold);
  width: 100%;
  font-size: 1.15rem;
  padding: 16px;
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(255,215,0,0.5);
}

.btn-primary:active:not(:disabled) { transform: translateY(0); }

.btn-spin {
  background: linear-gradient(135deg, #7C3AED 0%, #4338CA 100%);
  color: var(--white);
  box-shadow: 0 4px 20px rgba(124,58,237,0.4);
  width: 100%;
  font-size: 1.2rem;
  padding: 18px;
  animation: pulse-btn 2s infinite;
}

@keyframes pulse-btn {
  0%, 100% { box-shadow: 0 4px 20px rgba(124,58,237,0.4); }
  50%       { box-shadow: 0 4px 32px rgba(124,58,237,0.7); }
}

.btn-sm { padding: 8px 14px; font-size: 0.82rem; border-radius: var(--radius-sm); }
.btn-icon { background: transparent; color: var(--white); padding: 6px; border-radius: 6px; }
.btn-icon:hover { background: rgba(255,255,255,0.1); }

/* ── SPIN WHEEL WRAPPER ── */
#spin-section { display: none; }

.wheel-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  padding: 16px 0;
}

.wheel-outer {
  position: relative;
  width: 320px;
  height: 320px;
  max-width: 90vw;
  max-height: 90vw;
}

/* Pointer arrow */
.wheel-pointer {
  position: absolute;
  top: -18px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  filter: drop-shadow(0 2px 6px rgba(0,0,0,0.5));
}

.wheel-pointer svg {
  width: 36px;
  height: 40px;
}

#wheelCanvas {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  box-shadow: 0 0 0 6px var(--gold-main), 0 0 0 12px rgba(255,215,0,0.3), var(--shadow-gold);
  display: block;
}

.wheel-center-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gold-main), #FFA500);
  border: 4px solid var(--white);
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 800;
  color: var(--blue-deep);
  cursor: pointer;
  z-index: 10;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  transition: all 0.2s;
}

.wheel-center-btn:hover { transform: translate(-50%, -50%) scale(1.05); }

/* ── RESULT MODAL ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(6px);
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.modal-overlay.show {
  display: flex;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.modal-box {
  background: var(--blue-deep);
  border: 2px solid var(--gold-main);
  border-radius: var(--radius-xl);
  padding: 32px 24px;
  max-width: 400px;
  width: 100%;
  text-align: center;
  box-shadow: 0 20px 80px rgba(255,215,0,0.3);
  animation: slideUp 0.4s cubic-bezier(0.34,1.56,0.64,1);
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(40px) scale(0.9); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-icon {
  font-size: 4rem;
  display: block;
  margin-bottom: 12px;
  animation: bounce 0.6s cubic-bezier(0.34,1.56,0.64,1) 0.2s both;
}

@keyframes bounce {
  from { transform: scale(0); }
  to   { transform: scale(1); }
}

.modal-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--gold-main);
  margin-bottom: 8px;
  text-shadow: 0 2px 8px rgba(255,215,0,0.4);
}

.modal-prize-name {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--white);
  background: linear-gradient(135deg, var(--gold-main), #FFA500);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 12px 0;
}

.modal-info {
  background: rgba(255,255,255,0.06);
  border-radius: var(--radius-md);
  padding: 16px;
  margin: 16px 0;
  text-align: left;
}

.modal-info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 0;
  font-size: 0.9rem;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.modal-info-row:last-child { border-bottom: none; }
.modal-info-label { color: var(--blue-light); font-weight: 600; }
.modal-info-value { color: var(--white); font-weight: 700; }

/* ── ALERTS ── */
.alert {
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 0.88rem;
  font-weight: 600;
  display: none;
  margin-bottom: 16px;
  border-left: 4px solid;
}

.alert.show { display: flex; align-items: center; gap: 8px; }
.alert-error  { background: rgba(220,38,38,0.15);  border-color: var(--danger);  color: #FCA5A5; }
.alert-warn   { background: rgba(217,119,6,0.15);  border-color: var(--warn);    color: #FDE68A; }
.alert-success{ background: rgba(22,163,74,0.15);  border-color: var(--success); color: #86EFAC; }
.alert-info   { background: rgba(37,99,235,0.15);  border-color: var(--blue-mid);color: var(--blue-light); }

/* ── INFO BOX ── */
.info-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,215,0,0.12);
  border: 1px solid rgba(255,215,0,0.3);
  border-radius: 100px;
  padding: 4px 12px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--gold-light);
  margin-bottom: 4px;
}

/* ── CONFETTI CANVAS ── */
#confettiCanvas {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
}

/* ── LOADING ── */
.spinner {
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255,255,255,0.3);
  border-top-color: var(--white);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  display: inline-block;
}

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

/* ── DIVIDER ── */
.divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 20px 0;
  color: rgba(255,255,255,0.3);
  font-size: 0.78rem;
}

.divider::before, .divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: rgba(255,255,255,0.12);
}

/* ── USER INFO DISPLAY ── */
.user-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,215,0,0.1);
  border: 1px solid rgba(255,215,0,0.25);
  border-radius: 100px;
  padding: 8px 16px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--gold-light);
  margin-bottom: 16px;
}

/* ── DECORATIVE ELEMENTS ── */
.ribbon-top {
  text-align: center;
  font-size: 1.2rem;
  letter-spacing: 4px;
  opacity: 0.5;
  margin-bottom: 8px;
}

.ticket-border {
  border: 2px dashed rgba(255,215,0,0.3);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 20px;
  position: relative;
}

.ticket-border::before,
.ticket-border::after {
  content: '';
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  background: var(--blue-deep);
  border-radius: 50%;
  border: 2px dashed rgba(255,215,0,0.3);
}

.ticket-border::before { left: -12px; }
.ticket-border::after  { right: -12px; }

/* ── FOOTER ── */
.site-footer {
  text-align: center;
  padding: 24px 16px;
  color: rgba(255,255,255,0.25);
  font-size: 0.75rem;
}

/* ── RESPONSIVE ── */
@media (max-width: 360px) {
  .site-header h1 { font-size: 1.7rem; }
  .wheel-outer    { width: 280px; height: 280px; }
}

/* ── PRIZE WIN GLOW ── */
.win-glow {
  animation: winGlow 0.8s ease-in-out 3;
}

@keyframes winGlow {
  0%, 100% { box-shadow: 0 0 0 6px var(--gold-main), 0 0 0 12px rgba(255,215,0,0.3); }
  50%       { box-shadow: 0 0 0 12px var(--gold-main), 0 0 60px rgba(255,215,0,0.6); }
}