/* ===========================
   SWOJ Khmer — Shared Styles
   Cambodia flag palette:
     Blue  #032EA1
     Red   #CC0001
     White #FFFFFF
   =========================== */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+Khmer:wght@300;400;600;700&family=Noto+Sans:ital,wght@0,300;0,400;0,600;1,300&display=swap');

:root {
  --blue:       #032EA1;
  --blue-dark:  #021e70;
  --blue-light: #e8eeff;
  --red:        #CC0001;
  --red-dark:   #a30001;
  --white:      #ffffff;
  --off-white:  #f7f8fc;
  --text:       #1a1a2e;
  --text-muted: #5a607a;
  --radius:     10px;
  --shadow-sm:  0 2px 8px rgba(3,46,161,0.10);
  --shadow-md:  0 6px 24px rgba(3,46,161,0.18);
  --shadow-lg:  0 12px 40px rgba(3,46,161,0.22);
  --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans', sans-serif;
  background: var(--white);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ─── HERO / INDEX ─────────────────────────────── */

.hero {
  min-height: 100svh;
  background: var(--blue);
  background-image: linear-gradient(160deg, var(--blue-dark) 0%, var(--blue) 60%, #1040c8 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.5rem;
  position: relative;
  overflow: hidden;
}

/* subtle flag-stripe accent */
.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 6px;
  background: var(--red);
}
.hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 6px;
  background: var(--red);
}

.hero-content {
  text-align: center;
  max-width: 540px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
}

.logo {
  width: min(260px, 65vw);
  height: auto;
  filter: drop-shadow(0 4px 20px rgba(0,0,0,0.35));
}

.greeting-km {
  font-family: 'Noto Serif Khmer', serif;
  font-size: clamp(1.15rem, 4.5vw, 1.6rem);
  font-weight: 400;
  color: var(--white);
  line-height: 1.5;
}

.greeting-en {
  font-size: clamp(0.78rem, 2.8vw, 0.95rem);
  font-weight: 300;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.65);
}

.scroll-hint {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  color: rgba(255,255,255,0.5);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  animation: nudge 2.2s ease-in-out infinite;
}

.scroll-hint svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

@keyframes nudge {
  0%, 100% { transform: translateY(0);   opacity: .5; }
  50%       { transform: translateY(6px); opacity: .85; }
}

/* ─── RESOURCES SECTION (INDEX) ───────────────── */

.resources-section {
  padding: 2.5rem 1rem 4rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 1.75rem;
}

.section-title {
  font-family: 'Noto Serif Khmer', serif;
  font-size: clamp(1.2rem, 4vw, 1.6rem);
  color: var(--blue);
  font-weight: 600;
}

.section-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.3rem;
  letter-spacing: 0.04em;
}

/* Grid: 2 cols on mobile, 3 on tablet, 4 on desktop */
.resources-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.9rem;
}

@media (min-width: 580px) {
  .resources-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 900px) {
  .resources-grid { grid-template-columns: repeat(4, 1fr); gap: 1.2rem; }
}

.resource-card {
  display: block;
  border-radius: var(--radius);
  overflow: hidden;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
  background: var(--off-white);
  /* transition for desktop hover */
  transition: transform var(--transition), box-shadow var(--transition);
  /* keep cards proportional */
  aspect-ratio: 3/4;
  position: relative;
}

.resource-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition);
}

/* Desktop-only hover: grow card */
@media (hover: hover) and (pointer: fine) {
  .resource-card:hover {
    transform: scale(1.07);
    box-shadow: var(--shadow-lg);
    z-index: 2;
  }
}

/* Touch active feedback */
.resource-card:active {
  transform: scale(0.96);
}

/* ─── FOOTER ───────────────────────────────────── */

.site-footer {
  background: var(--blue);
  color: rgba(255,255,255,0.55);
  text-align: center;
  padding: 1.25rem 1rem;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
}

/* ─── RESOURCE DETAIL PAGE ─────────────────────── */

.resource-page-header {
  background: var(--blue);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--white);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  opacity: 0.9;
  transition: opacity 0.15s;
  padding: 0.35rem 0.5rem;
  border-radius: 6px;
}

.back-btn:hover,
.back-btn:focus {
  opacity: 1;
  background: rgba(255,255,255,0.12);
}

.back-btn svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

.header-logo-mini {
  height: 32px;
  width: auto;
  opacity: 0.88;
}

.resource-main {
  max-width: 720px;
  margin: 0 auto;
  padding: 1.75rem 1rem 3rem;
}

.resource-cover-wrap {
  text-align: center;
  margin-bottom: 1.75rem;
}

.resource-cover {
  max-width: min(320px, 80vw);
  height: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  display: inline-block;
}

.resource-title {
  font-family: 'Noto Serif Khmer', serif;
  font-size: clamp(1.1rem, 4vw, 1.45rem);
  font-weight: 600;
  color: var(--blue);
  line-height: 1.5;
  margin-bottom: 1rem;
}

.resource-description {
  font-family: 'Noto Serif Khmer', serif;
  font-size: clamp(0.95rem, 3vw, 1.05rem);
  color: var(--text);
  line-height: 1.85;
  margin-bottom: 2rem;
  padding: 1.25rem;
  background: var(--off-white);
  border-left: 4px solid var(--blue);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.resource-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  text-decoration: none;
  font-size: 1rem;
  font-weight: 600;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  text-align: center;
  width: 100%;
  letter-spacing: 0.02em;
}

.btn svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.btn-primary {
  background: var(--red);
  color: var(--white);
  box-shadow: 0 3px 12px rgba(204,0,1,0.3);
}

.btn-primary:hover {
  background: var(--red-dark);
  box-shadow: 0 5px 18px rgba(204,0,1,0.4);
  transform: translateY(-1px);
}

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

.btn-secondary {
  background: var(--blue-light);
  color: var(--blue);
  border: 2px solid rgba(3,46,161,0.18);
}

.btn-secondary:hover {
  background: var(--blue);
  color: var(--white);
  border-color: var(--blue);
  transform: translateY(-1px);
}

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

/* ─── LANGUAGE TOGGLE ──────────────────────────── */

.header-right {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.lang-toggle {
  background: rgba(255,255,255,0.15);
  border: 1.5px solid rgba(255,255,255,0.35);
  color: var(--white);
  font-family: 'Noto Sans', sans-serif;
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 0.28rem 0.65rem;
  border-radius: 20px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  line-height: 1.4;
  transition: background var(--transition), border-color var(--transition);
  white-space: nowrap;
}

.lang-toggle:hover {
  background: rgba(255,255,255,0.28);
  border-color: rgba(255,255,255,0.6);
}

.lang-sep {
  opacity: 0.45;
  font-weight: 300;
}

.lang-toggle[data-current="km"] .lang-km-label { opacity: 1;    font-weight: 700; }
.lang-toggle[data-current="km"] .lang-en-label { opacity: 0.45; font-weight: 400; }
.lang-toggle[data-current="en"] .lang-en-label { opacity: 1;    font-weight: 700; }
.lang-toggle[data-current="en"] .lang-km-label { opacity: 0.45; font-weight: 400; }

/* Hero: position toggle button in top-right corner */
.lang-toggle-hero {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  z-index: 10;
}

/* Switch to latin font in English mode for Khmer-font elements */
body.lang-en .resource-title,
body.lang-en .resource-description,
body.lang-en .greeting-km,
body.lang-en .section-title {
  font-family: 'Noto Sans', sans-serif;
}

/* ─── RESPONSIVE TWEAKS ─────────────────────────── */

@media (min-width: 600px) {
  .resource-actions {
    flex-direction: row;
    flex-wrap: wrap;
  }
  .btn {
    width: auto;
    flex: 1 1 200px;
  }
}