/* Styles autonomes dans l'esprit de ton portfolio : fond sombre, cartes glassy, spacing large */

:root {
  --color-bg: #0b1221;
  --color-surface: rgba(255, 255, 255, 0.05);
  --color-surface-strong: rgba(255, 255, 255, 0.08);
  --color-border: rgba(255, 255, 255, 0.12);
  --color-text: #e9edf5;
  --color-muted: rgba(255, 255, 255, 0.7);
  --color-accent: #22d3ee;
  --color-primary: #2563eb;
  --max-width: 1200px;
  --radius-lg: 18px;
}

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  background: radial-gradient(circle at 20% 20%, rgba(37, 99, 235, 0.12), transparent 35%),
    radial-gradient(circle at 80% 0%, rgba(34, 211, 238, 0.16), transparent 30%),
    #0b1221;
  color: var(--color-text);
  line-height: 1.6;
  padding: 0 1rem 3rem;
}

main {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

body > header.section-display {
  margin-top: 1.5rem;
  margin-bottom: 2rem;
}

h1,
h2,
h3,
h4 {
  color: #fff;
  letter-spacing: -0.02em;
}

p {
  color: var(--color-muted);
  margin: 0;
}

.section-display {
  position: relative;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 4rem 1.5rem;
  display: grid;
  gap: 2.4rem;
  background: rgba(17, 24, 39, 0.65);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  box-shadow: 0 28px 60px rgba(15, 23, 42, 0.35);
}

.section-heading {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 760px;
}

.section-heading .eyebrow {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: rgba(255, 255, 255, 0.6);
}

.section-heading h1,
.section-heading h2 {
  margin: 0;
  font-weight: 700;
}

.section-heading p {
  font-size: 1.05rem;
}

.sandbox-content {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.filter-menu {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  justify-content: flex-end;
}

.filter-btn {
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.06);
  color: inherit;
  padding: 0.65rem 1.1rem;
  border-radius: 999px;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.filter-btn:hover,
.filter-btn:focus-visible {
  border-color: var(--color-accent);
  background: rgba(255, 255, 255, 0.12);
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.26);
  outline: none;
  transform: translateY(-1px);
}

.filter-btn.active {
  border-color: rgba(6, 182, 212, 0.8);
  color: var(--color-accent);
  box-shadow: 0 12px 28px rgba(6, 182, 212, 0.3);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.16), rgba(6, 182, 212, 0.18));
}

.resource-grid {
  display: grid;
  gap: 1.4rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.resource-card {
  background: var(--color-surface);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  color: inherit;
  text-decoration: none;
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.28);
  transition: transform 0.35s ease, opacity 0.35s ease, border-color 0.3s ease, background 0.3s ease, box-shadow 0.3s ease;
  opacity: 0;
  transform: translateY(16px);
  will-change: transform, opacity;
}

.resource-card.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.resource-card:hover,
.resource-card.enhanced-hover:hover {
  transform: translateY(-6px) scale(1.01);
  border-color: rgba(6, 182, 212, 0.45);
  background: var(--color-surface-strong);
  box-shadow: 0 18px 42px rgba(37, 99, 235, 0.32), 0 10px 26px rgba(6, 182, 212, 0.22);
}

.resource-card h4 {
  margin: 0;
  font-size: 1.05rem;
}

.resource-card p {
  color: var(--color-muted);
  line-height: 1.6;
  font-size: 0.95rem;
}

.experience-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.82);
}

.resource-link {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--color-accent);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.85rem;
}

.resource-link i {
  transition: transform 0.25s ease;
}

.resource-card:hover .resource-link i {
  transform: translateX(6px);
}

.resource-card.hidden-card {
  display: none;
}

@media screen and (max-width: 720px) {
  body {
    padding: 0 1rem 2rem;
  }

  .section-display {
    padding: 3rem 1.25rem;
  }

  .filter-menu {
    justify-content: flex-start;
  }
}

body[data-theme="light"] {
  --color-bg: #f5f7fb;
  --color-surface: rgba(15, 23, 42, 0.04);
  --color-surface-strong: rgba(15, 23, 42, 0.08);
  --color-border: rgba(15, 23, 42, 0.12);
  --color-text: #0f172a;
  --color-muted: rgba(15, 23, 42, 0.7);
  background: radial-gradient(circle at 10% 10%, rgba(37, 99, 235, 0.08), transparent 32%),
    radial-gradient(circle at 90% 0%, rgba(34, 211, 238, 0.1), transparent 28%),
    #f5f7fb;
  color: var(--color-text);
}

body[data-theme="light"] .section-display {
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 18px 36px rgba(15, 23, 42, 0.12);
}

body[data-theme="light"] .filter-btn {
  border-color: rgba(15, 23, 42, 0.08);
  background: rgba(15, 23, 42, 0.04);
}

body[data-theme="light"] .filter-btn:hover,
body[data-theme="light"] .filter-btn:focus-visible {
  background: rgba(15, 23, 42, 0.08);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.16);
}

body[data-theme="light"] .filter-btn.active {
  box-shadow: 0 12px 28px rgba(6, 182, 212, 0.22);
}