/**
 * Wings Junior School — 2025–2026 Design System
 * Modern, warm, and accessible.
 */

:root {
  /* Brand */
  --primary: #b91c1c;
  --primary-hover: #991b1b;
  --primary-light: #fef2f2;
  --primary-muted: rgba(185, 28, 28, 0.08);
  --accent-warm: #d97706;
  --accent-warm-light: #fef3c7;

  /* Surfaces */
  --surface: #fafafa;
  --surface-elevated: #ffffff;
  --surface-overlay: rgba(15, 23, 42, 0.6);

  /* Text */
  --text: #0f172a;
  --text-muted: #475569;
  --text-soft: #64748b;

  /* Borders & shadows */
  --border: #e2e8f0;
  --border-soft: #f1f5f9;
  --shadow-soft: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-card-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.06), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --radius-sm: 0.75rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-xl: 2rem;
  --radius-full: 9999px;

  /* Motion */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --duration: 0.25s;
}

/* Skip link — accessibility */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  z-index: 100;
  padding: 0.75rem 1.25rem;
  background: var(--primary);
  color: white;
  font-weight: 600;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  transition: top var(--duration) ease;
}

.skip-link:focus {
  top: 1rem;
  outline: 3px solid var(--accent-warm);
  outline-offset: 2px;
}

/* Focus visible — keyboard UX */
a:focus-visible,
button:focus-visible,
[tabindex="0"]:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Base */
html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* Typography */
.font-display {
  letter-spacing: -0.02em;
}

/* Header — glass-style when scrolled */
.header-glass {
  background: var(--surface-elevated);
  box-shadow: var(--shadow-soft);
  transition: background-color var(--duration) ease, box-shadow var(--duration) ease;
}

.header-glass.scrolled {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--border-soft);
}

/* Nav link underline animation */
.nav-link-2025 {
  position: relative;
}

.nav-link-2025::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  border-radius: var(--radius-full);
  transition: width var(--duration) var(--ease-out-expo);
}

.nav-link-2025:hover::after,
.nav-link-2025.active::after {
  width: 100%;
}

/* Buttons */
.btn-primary-2025 {
  background: var(--primary);
  color: white;
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius-lg);
  font-weight: 600;
  transition: transform var(--duration) var(--ease-out-expo), box-shadow var(--duration) ease, background-color var(--duration) ease;
  box-shadow: var(--shadow-soft);
}

.btn-primary-2025:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-card-hover);
}

.btn-outline-2025 {
  border: 2px solid currentColor;
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius-lg);
  font-weight: 600;
  transition: transform var(--duration) var(--ease-out-expo), color var(--duration) ease, background-color var(--duration) ease;
}

.btn-outline-2025:hover {
  transform: translateY(-1px);
}

.btn-primary-2025:active,
.btn-outline-2025:active {
  transform: translateY(0) scale(0.98);
}

/* Back to top */
.back-to-top {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 45;
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-full);
  background: var(--primary);
  color: white;
  border: none;
  box-shadow: var(--shadow-card-hover);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(0.5rem);
  transition: opacity var(--duration) ease, visibility var(--duration) ease, transform var(--duration) var(--ease-out-expo), background-color var(--duration) ease;
}

.back-to-top:hover {
  background: var(--primary-hover);
}

.back-to-top:active {
  transform: translateY(0.5rem) scale(0.95);
}

.back-to-top.back-to-top-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .back-to-top { transition: opacity 0.15s ease, visibility 0.15s ease; }
}

/* Cards */
.card-2025 {
  background: var(--surface-elevated);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-card);
  transition: transform var(--duration) var(--ease-out-expo), box-shadow var(--duration) ease, border-color var(--duration) ease;
}

.card-2025:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--border);
}

/* Section titles */
.section-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 0.75rem;
}

/* Hero gradient overlay */
.hero-overlay-2025 {
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.5) 0%, rgba(15, 23, 42, 0.75) 100%);
}

/* Gradient CTA section */
.cta-gradient-2025 {
  background: linear-gradient(135deg, #b91c1c 0%, #7f1d1d 50%, #991b1b 100%);
  position: relative;
  overflow: hidden;
}

.cta-gradient-2025::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 50% at 50% 120%, rgba(255,255,255,0.08) 0%, transparent 60%);
  pointer-events: none;
}

/* Icon circles */
.icon-circle-2025 {
  width: 4rem;
  height: 4rem;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-muted);
  color: var(--primary);
  transition: background-color var(--duration) ease, transform var(--duration) var(--ease-out-expo);
}

.card-2025:hover .icon-circle-2025 {
  background: var(--primary);
  color: white;
  transform: scale(1.05);
}

/* Slideshow dots — modern pill style */
.slideshow-dot-2025 {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: width var(--duration) var(--ease-out-expo), background-color var(--duration) ease;
}

.slideshow-dot-2025.active {
  width: 24px;
  background: white;
}

.slideshow-dot-2025:hover {
  background: rgba(255, 255, 255, 0.8);
}

/* Hero / page banner overlay — soft dark, minimal red so images show through */
.hero-banner-overlay {
  position: absolute;
  inset: 0;
  z-index: 10;
  background: linear-gradient(
    135deg,
    rgba(15, 23, 42, 0.62) 0%,
    rgba(15, 23, 42, 0.5) 50%,
    rgba(30, 30, 30, 0.52) 100%
  );
  pointer-events: none;
}

/* Slideshow — smooth crossfade with subtle scale (2025) */
.slideshow-container {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.slideshow-container .slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transform: scale(1.03);
  transition:
    opacity 1.35s cubic-bezier(0.4, 0, 0.2, 1),
    transform 1.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.slideshow-container .slide.active {
  opacity: 1;
  transform: scale(1);
  z-index: 1;
}

.slideshow-container .slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

@media (prefers-reduced-motion: reduce) {
  .slideshow-container .slide {
    transition: opacity 0.3s ease;
    transform: none;
  }
  .slideshow-container .slide.active { transform: none; }
}

/* Form inputs */
.input-2025:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-muted);
}

/* Scroll indicator */
.scroll-indicator-2025 {
  animation: scroll-bounce 2s ease-in-out infinite;
}

@keyframes scroll-bounce {
  0%, 100% { transform: translate(-50%, 0); opacity: 1; }
  50% { transform: translate(-50%, 6px); opacity: 0.7; }
}

/* Section rhythm — optional soft top border between sections */
.section-border-t {
  border-top: 1px solid var(--border-soft);
}

/* Stagger children (for lists/cards) */
.stagger-1 { animation-delay: 0.05s; }
.stagger-2 { animation-delay: 0.1s; }
.stagger-3 { animation-delay: 0.15s; }

/* Scroll-reveal — 2025 UX: elements animate in as user scrolls */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease-out-expo), transform 0.7s var(--ease-out-expo);
}

.reveal-on-scroll.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-on-scroll.reveal-scale {
  transform: translateY(28px) scale(0.97);
}

.reveal-on-scroll.reveal-scale.revealed {
  transform: translateY(0) scale(1);
}

/* Stagger delays for grid/list children */
.reveal-on-scroll.reveal-delay-1 { transition-delay: 0.06s; }
.reveal-on-scroll.reveal-delay-2 { transition-delay: 0.12s; }
.reveal-on-scroll.reveal-delay-3 { transition-delay: 0.18s; }
.reveal-on-scroll.reveal-delay-4 { transition-delay: 0.24s; }
.reveal-on-scroll.reveal-delay-5 { transition-delay: 0.3s; }
.reveal-on-scroll.reveal-delay-6 { transition-delay: 0.36s; }

@media (prefers-reduced-motion: reduce) {
  .reveal-on-scroll {
    opacity: 1;
    transform: none;
  }
  .reveal-on-scroll.reveal-scale { transform: none; }
}

/* Hide broken images — used by scroll-reveal-2025.js image error handler */
img.img-error {
  opacity: 0;
  pointer-events: none;
}