/* ============================================
   โรงเรียนอนุบาลหนองวัวซอ — Gateway & Home
   ============================================ */

.school-logo {
  object-fit: contain;
  border-radius: 12px;
  background: #fff;
  padding: 4px;
}

.school-logo-lg {
  width: 120px;
  height: 120px;
  padding: 8px;
  border-radius: 20px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}

:root,
html[data-period="morning"],
[data-period="morning"] {
  --bg: #f0f7ff;
  --surface: #ffffff;
  --border: #dbeafe;
  --text: #1e3a5f;
  --text-secondary: #5b7a9d;
  --text-muted: #8fa8c4;

  --accent: #2563eb;
  --accent-deep: #1d4ed8;
  --blue: #2563eb;
  --cyan: #0891b2;
  --gradient: linear-gradient(135deg, #60a5fa 0%, #38bdf8 55%, #2563eb 100%);

  --page-bg: #f0f7ff;
  --header-bg: rgba(240, 249, 255, 0.82);
  --card-bg: rgba(255, 255, 255, 0.9);
  --card-border: rgba(191, 219, 254, 0.6);
  --badge-bg: rgba(147, 197, 253, 0.25);
  --badge-color: #1d4ed8;
  --shadow-color: 30, 64, 120;
  --card-hover-border: rgba(96, 165, 250, 0.4);

  --bg-dark: #0c1222;
  --font-display: 'Outfit', sans-serif;
  --font-body: 'Sarabun', sans-serif;
  --radius: 16px;
  --radius-lg: 24px;
  --shadow: 0 4px 24px rgba(var(--shadow-color), 0.07);
  --shadow-lg: 0 20px 60px rgba(var(--shadow-color), 0.1);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html[data-period="afternoon"],
[data-period="afternoon"] {
  --bg: #faf7f2;
  --border: #ede4d8;
  --text: #3d2c1e;
  --text-secondary: #7c6a5a;
  --text-muted: #a89484;

  --accent: #d97706;
  --accent-deep: #c2410c;
  --blue: #d97706;
  --cyan: #ea580c;
  --gradient: linear-gradient(135deg, #fbbf24 0%, #f97316 55%, #ea580c 100%);

  --page-bg: #faf7f2;
  --header-bg: rgba(255, 251, 245, 0.82);
  --card-bg: rgba(255, 251, 245, 0.9);
  --card-border: rgba(254, 215, 170, 0.5);
  --badge-bg: rgba(251, 191, 36, 0.2);
  --badge-color: #c2410c;
  --shadow-color: 120, 53, 15;
  --card-hover-border: rgba(251, 146, 60, 0.35);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  transition: color 1s ease, background 1.2s ease;
}

a { color: inherit; text-decoration: none; }

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================
   SPLASH / GATEWAY PAGE
   ============================================ */

.splash-page {
  min-height: 100vh;
  color: var(--text);
  overflow: hidden;
}

.splash-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.splash-bg-motion {
  position: absolute;
  inset: -8%;
  will-change: transform;
}

.splash-bg-motion img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  animation: kenBurns 22s ease-in-out infinite alternate;
}

@keyframes kenBurns {
  0% {
    transform: scale(1) translate(0, 0);
  }
  50% {
    transform: scale(1.08) translate(-1.5%, -1%);
  }
  100% {
    transform: scale(1.14) translate(1%, 1.5%);
  }
}

.splash-bg-overlay {
  position: absolute;
  inset: 0;
  transition: background 1.2s ease;
}

[data-period="morning"] .splash-bg-overlay {
  background:
    linear-gradient(160deg, rgba(240, 249, 255, 0.82) 0%, rgba(224, 242, 254, 0.75) 40%, rgba(248, 250, 252, 0.85) 100%),
    radial-gradient(ellipse 85% 65% at 50% 45%, rgba(219, 234, 254, 0.55) 0%, transparent 70%);
}

[data-period="afternoon"] .splash-bg-overlay {
  background:
    linear-gradient(160deg, rgba(255, 251, 235, 0.8) 0%, rgba(255, 237, 213, 0.72) 40%, rgba(255, 251, 245, 0.82) 100%),
    radial-gradient(ellipse 85% 65% at 50% 45%, rgba(255, 247, 237, 0.6) 0%, transparent 70%);
}

.splash {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 24px 80px;
}

/* Image Popup */
.image-popup {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}

.image-popup.is-open {
  opacity: 1;
  visibility: visible;
}

.image-popup-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.image-popup-box {
  position: relative;
  z-index: 1;
  max-width: min(900px, 95vw);
  max-height: 90vh;
  transform: scale(0.92);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.image-popup.is-open .image-popup-box {
  transform: scale(1);
}

.image-popup-box img {
  display: block;
  width: 100%;
  max-height: 90vh;
  object-fit: contain;
  border: none;
  border-radius: 0;
  box-shadow: none;
}

.image-popup-close {
  position: absolute;
  top: -14px;
  right: -14px;
  z-index: 2;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  color: var(--text);
  border-radius: 50%;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  transition: all var(--transition);
}

.image-popup-close:hover {
  background: var(--blue);
  color: #fff;
  transform: scale(1.08);
}

body.popup-open {
  overflow: hidden;
}

.splash-content {
  text-align: center;
  max-width: 520px;
  padding: 40px 36px;
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: var(--radius-xl, 28px);
  border: 1px solid var(--card-border);
  box-shadow:
    0 8px 40px rgba(var(--shadow-color), 0.1),
    0 0 0 1px rgba(255, 255, 255, 0.6) inset;
  transition: background 1s ease, border-color 1s ease, box-shadow 1s ease;
}

.splash-page .reveal {
  opacity: 0;
  transform: translateY(24px);
  animation: fadeUp 0.8s ease-out forwards;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

.splash-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
}

.splash-logo .school-logo-lg {
  box-shadow: 0 8px 24px rgba(var(--shadow-color), 0.15);
  animation: logoPulse 3s ease-in-out infinite;
}

@keyframes logoPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.04); }
}

.splash-logo-text {
  font-family: var(--font-body);
  font-size: clamp(1.25rem, 3.5vw, 1.65rem);
  font-weight: 700;
  line-height: 1.4;
  color: var(--text);
}

.splash-tagline {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--blue);
  margin-bottom: 12px;
}

.splash-title {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 6vw, 3.5rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  color: var(--text);
}

.splash-desc {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 400px;
  margin: 0 auto 36px;
  line-height: 1.8;
}

.btn-enter {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 44px;
  background: var(--gradient);
  color: #fff;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  border-radius: 100px;
  box-shadow: 0 8px 28px rgba(var(--shadow-color), 0.22);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.btn-enter::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.25) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--transition);
}

.btn-enter:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 12px 36px rgba(var(--shadow-color), 0.28);
}

.btn-enter:hover::before {
  opacity: 1;
}

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

.btn-enter.leaving {
  pointer-events: none;
  opacity: 0;
  transform: scale(0.9);
  transition: all 0.4s ease;
}

.btn-enter-icon {
  display: flex;
  transition: transform var(--transition);
}

.btn-enter:hover .btn-enter-icon {
  transform: translateX(4px);
}

.splash-hint {
  margin-top: 20px;
  font-size: 14px;
  color: var(--text-muted);
}

.splash-footer {
  position: absolute;
  bottom: 20px;
  left: 0;
  right: 0;
  text-align: center;
}

.splash-footer p {
  font-size: 13px;
  color: var(--text-muted);
}

@media (max-width: 480px) {
  .image-popup {
    padding: 16px;
  }

  .image-popup-close {
    top: -10px;
    right: -6px;
    width: 36px;
    height: 36px;
  }

  .splash-content {
    padding: 32px 24px;
    margin: 0 8px;
  }

  .splash-desc br {
    display: none;
  }
}

/* ============================================
   HOME PAGE — 5 CHANNELS
   ============================================ */

.home-page {
  min-height: 100vh;
  background: var(--page-bg);
  display: flex;
  flex-direction: column;
  transition: background 1.2s ease;
}

.home-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
  background-size: 300% 300%;
  animation: homeBgShift 18s ease-in-out infinite alternate;
  transition: background 1.5s ease;
}

[data-period="morning"] .home-bg {
  background: linear-gradient(
    135deg,
    #f0f9ff 0%,
    #e0f2fe 20%,
    #ede9fe 40%,
    #f8fafc 60%,
    #ecfeff 80%,
    #dbeafe 100%
  );
}

[data-period="afternoon"] .home-bg {
  background: linear-gradient(
    135deg,
    #fffbeb 0%,
    #fff7ed 20%,
    #ffedd5 40%,
    #fef3c7 60%,
    #fce7f3 80%,
    #fff1e6 100%
  );
}

.home-bg::before,
.home-bg::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  animation: homeBlobFloat 20s ease-in-out infinite alternate;
  transition: background 1.5s ease;
}

[data-period="morning"] .home-bg::before {
  width: 55vw;
  height: 55vw;
  max-width: 520px;
  max-height: 520px;
  background: rgba(147, 197, 253, 0.38);
  top: -10%;
  left: -8%;
}

[data-period="morning"] .home-bg::after {
  width: 50vw;
  height: 50vw;
  max-width: 480px;
  max-height: 480px;
  background: rgba(165, 243, 252, 0.32);
  bottom: -8%;
  right: -6%;
  animation-delay: -10s;
  animation-direction: alternate-reverse;
}

[data-period="afternoon"] .home-bg::before {
  width: 55vw;
  height: 55vw;
  max-width: 520px;
  max-height: 520px;
  background: rgba(251, 191, 36, 0.35);
  top: -10%;
  left: -8%;
}

[data-period="afternoon"] .home-bg::after {
  width: 50vw;
  height: 50vw;
  max-width: 480px;
  max-height: 480px;
  background: rgba(251, 146, 60, 0.32);
  bottom: -8%;
  right: -6%;
  animation-delay: -10s;
  animation-direction: alternate-reverse;
}

@keyframes homeBgShift {
  0% {
    background-position: 0% 0%;
  }
  33% {
    background-position: 50% 100%;
  }
  66% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 100%;
  }
}

@keyframes homeBlobFloat {
  0% {
    transform: translate(0, 0) scale(1);
  }
  50% {
    transform: translate(4%, 3%) scale(1.06);
  }
  100% {
    transform: translate(-3%, -2%) scale(0.96);
  }
}

.home-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background 1s ease, border-color 1s ease;
}

.home-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.home-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  min-width: 0;
}

.home-logo-text {
  font-family: var(--font-body);
  font-size: clamp(14px, 2.5vw, 17px);
  font-weight: 700;
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.btn-back {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 100px;
  background: var(--surface);
  transition: all var(--transition);
}

.btn-back:hover {
  color: var(--blue);
  border-color: var(--blue);
}

.home-main {
  position: relative;
  z-index: 1;
  flex: 1;
  padding: 48px 0 80px;
}

.home-intro {
  text-align: center;
  max-width: 560px;
  margin: 0 auto 48px;
}

.home-badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--badge-bg);
  color: var(--badge-color);
  transition: background 1s ease, color 1s ease;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  border-radius: 100px;
  margin-bottom: 16px;
}

.home-intro h1 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 12px;
}

.home-intro p {
  color: var(--text-secondary);
  font-size: 17px;
}

.channels-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.channel-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.channel-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--gradient);
  opacity: 0;
  transition: opacity var(--transition);
}

.channel-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--card-hover-border);
}

.channel-card:hover::before {
  opacity: 1;
}

.channel-card:nth-child(5) {
  grid-column: 1 / -1;
  max-width: calc(50% - 10px);
  margin: 0 auto;
  width: 100%;
}

.channel-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  flex-shrink: 0;
}

[data-period="morning"] .channel-icon-1 { background: #dbeafe; color: #2563eb; }
[data-period="morning"] .channel-icon-2 { background: #e0f2fe; color: #0891b2; }
[data-period="morning"] .channel-icon-3 { background: #ede9fe; color: #7c3aed; }
[data-period="morning"] .channel-icon-4 { background: #ecfdf5; color: #059669; }
[data-period="morning"] .channel-icon-5 { background: #f0f9ff; color: #0284c7; }

[data-period="afternoon"] .channel-icon-1 { background: #ffedd5; color: #ea580c; }
[data-period="afternoon"] .channel-icon-2 { background: #fef3c7; color: #d97706; }
[data-period="afternoon"] .channel-icon-3 { background: #fff7ed; color: #c2410c; }
[data-period="afternoon"] .channel-icon-4 { background: #fce7f3; color: #be185d; }
[data-period="afternoon"] .channel-icon-5 { background: #fff1e6; color: #b45309; }

[data-period="morning"] .channel-icon-6 { background: #e0e7ff; color: #4338ca; }
[data-period="morning"] .channel-icon-7 { background: #fef3c7; color: #b45309; }
[data-period="morning"] .channel-icon-8 { background: #fce7f3; color: #db2777; }
[data-period="morning"] .channel-icon-9 { background: #cffafe; color: #0e7490; }
[data-period="morning"] .channel-icon-10 { background: #f3f4f6; color: #4b5563; }
[data-period="morning"] .channel-icon-11 { background: #dcfce7; color: #15803d; }
[data-period="morning"] .channel-icon-12 { background: #ede9fe; color: #6d28d9; }
[data-period="morning"] .channel-icon-13 { background: #ffedd5; color: #c2410c; }
[data-period="morning"] .channel-icon-14 { background: #ecfccb; color: #65a30d; }
[data-period="morning"] .channel-icon-15 { background: #fae8ff; color: #a21caf; }

[data-period="afternoon"] .channel-icon-6 { background: #fff7ed; color: #9a3412; }
[data-period="afternoon"] .channel-icon-7 { background: #fef9c3; color: #a16207; }
[data-period="afternoon"] .channel-icon-8 { background: #ffe4e6; color: #e11d48; }
[data-period="afternoon"] .channel-icon-9 { background: #ecfeff; color: #0f766e; }
[data-period="afternoon"] .channel-icon-10 { background: #f5f5f4; color: #57534e; }
[data-period="afternoon"] .channel-icon-11 { background: #fef3c7; color: #ca8a04; }
[data-period="afternoon"] .channel-icon-12 { background: #fdf2f8; color: #be185d; }
[data-period="afternoon"] .channel-icon-13 { background: #ffedd5; color: #ea580c; }
[data-period="afternoon"] .channel-icon-14 { background: #ecfdf5; color: #047857; }
[data-period="afternoon"] .channel-icon-15 { background: #fff1f2; color: #be123c; }

.channel-icon-custom {
  background: color-mix(in srgb, var(--channel-color) 18%, white);
  color: var(--channel-color);
}

.channel-card-custom::before {
  background: var(--channel-color);
}

.channel-card-custom:hover .channel-arrow {
  color: var(--channel-color);
}

.channel-body {
  flex: 1;
  min-width: 0;
}

.channel-num {
  display: block;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.channel-body h2 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--text);
}

.channel-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.channel-arrow {
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--text-muted);
  transition: all var(--transition);
  flex-shrink: 0;
}

.channel-card:hover .channel-arrow {
  color: var(--blue);
  transform: translateX(4px);
}

.channel-status {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 4px 10px;
  background: #f1f5f9;
  color: var(--text-muted);
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 600;
  border-radius: 100px;
}

.home-footer {
  position: relative;
  z-index: 1;
  padding: 24px 0;
  border-top: 1px solid var(--border);
  text-align: center;
}

.home-footer p {
  font-size: 13px;
  color: var(--text-muted);
}

/* Toast for placeholder channels */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  padding: 14px 28px;
  background: var(--bg-dark);
  color: #fff;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 500;
  border-radius: 100px;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  opacity: 0;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
}

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

/* Responsive */
@media (max-width: 768px) {
  .channels-grid {
    grid-template-columns: 1fr;
  }

  .channel-card:nth-child(5) {
    max-width: 100%;
  }

  .channel-card {
    padding: 20px;
    gap: 16px;
  }

  .channel-arrow {
    display: none;
  }

  .splash-desc br {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .home-bg {
    animation: none;
    background-position: 0% 0%;
  }

  html { scroll-behavior: auto; }
}