/* Biodiva design system — Biology Green palette */

:root {
  --bio-green: #16a085;
  --bio-teal: #14b8a6;
  --science-blue: #3b82f6;
  --bio-dark: #102a43;
  --bio-bg: #f6faf8;
  --bio-card: #ffffff;
  --bio-soft: #e8f7f1;
  --bio-highlight: #f4b942;
  --bio-error: #ef6461;

  /* Legacy aliases mapped to biology palette */
  --cerulean: var(--bio-green);
  --sea: var(--bio-teal);
  --apricot: var(--bio-highlight);
  --floral: var(--bio-bg);

  --primary-color: #16a085;
  --primary-hover: #128a72;
  --primary-soft: rgba(22, 160, 133, 0.12);
  --secoundery-color: #14b8a6;
  --secondary-green: #14b8a6;
  --secondary-green-hover: #0f9a8a;
  --third-color: #3b82f6;
  --accent-teal: #14b8a6;
  --danger--color: #ef6461;
  --neon: rgba(20, 184, 166, 0.65);
  --neon-apricot: rgba(244, 185, 66, 0.55);

  --body-color: #f6faf8;
  --surface-color: #ffffff;
  --section-muted: #e8f7f1;
  --light-bg: #e8f7f1;
  --tags-color: #102a43;
  --text-muted: #4a6673;
  --border-color: rgba(22, 160, 133, 0.14);
  --input-selection-background: #e8f7f1;

  --gradient-hero: linear-gradient(135deg, #16a085 0%, #14b8a6 100%);
  --gradient-cta: linear-gradient(135deg, #14b8a6 0%, #16a085 100%);
  --gradient-footer: linear-gradient(160deg, #102a43 0%, #16a085 58%, #0a1f32 100%);
  --gradient-card: linear-gradient(180deg, #ffffff, #f6faf8);
  --gradient-apricot: linear-gradient(145deg, #f4b942 0%, #e5a82e 100%);
  --gradient-highlight: linear-gradient(145deg, #f4b942 0%, #e5a82e 100%);

  --shadow-sm: 0 1px 2px rgba(16, 42, 43, 0.06);
  --shadow-md: 0 10px 28px rgba(22, 160, 133, 0.1);
  --shadow-lg: 0 22px 50px rgba(22, 160, 133, 0.14);
  --shadow-glow: 0 10px 28px rgba(20, 184, 166, 0.32);
  --shadow-neon: 0 0 18px rgba(20, 184, 166, 0.45);

  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --radius-xl: 36px;

  --section-outer-space: 88px;
  --section-inner-space: 72px;
  --header-height: 84px;

  --main-transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
  --secoundery-transition: color 0.3s ease, background-color 0.3s ease;
  --motion: 0.45s cubic-bezier(0.22, 1, 0.36, 1);

  --boxSizing-color: inset 6px 6px 10px 0 rgba(0, 0, 0, 0.04),
    inset -6px -6px 10px 0 rgba(255, 255, 255, 0.7);
}

.darkmode {
  --bio-dark: #f6faf8;
  --bio-bg: #0d1f2d;
  --bio-card: #152a3d;
  --bio-soft: #1a3044;

  --primary-color: #2dd4bf;
  --primary-hover: #5eead4;
  --primary-soft: rgba(45, 212, 191, 0.12);
  --secoundery-color: #2dd4bf;
  --secondary-green: #14b8a6;
  --secondary-green-hover: #5eead4;
  --third-color: #60a5fa;
  --accent-teal: #2dd4bf;
  --danger--color: #f87171;
  --neon: rgba(45, 212, 191, 0.5);
  --neon-apricot: rgba(244, 185, 66, 0.45);

  --cerulean: #2dd4bf;
  --sea: #2dd4bf;
  --apricot: #f4b942;
  --floral: #0d1f2d;

  --body-color: #0d1f2d;
  --surface-color: #152a3d;
  --section-muted: #122433;
  --light-bg: #1a3044;
  --tags-color: #f6faf8;
  --text-muted: #b8c9d4;
  --border-color: rgba(45, 212, 191, 0.14);
  --input-selection-background: rgba(16, 42, 67, 0.9);

  --gradient-hero: linear-gradient(135deg, #0a2535 0%, #16a085 100%);
  --gradient-cta: linear-gradient(135deg, #14b8a6 0%, #16a085 100%);
  --gradient-footer: linear-gradient(160deg, #07141a 0%, #102a43 100%);
  --gradient-card: linear-gradient(180deg, #152a3d, #0d1f2d);
  --gradient-apricot: linear-gradient(145deg, #f4b942 0%, #c98f2a 100%);
  --gradient-highlight: linear-gradient(145deg, #f4b942 0%, #c98f2a 100%);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 10px 32px rgba(45, 212, 191, 0.22);
  --shadow-neon: 0 0 22px rgba(45, 212, 191, 0.35);

  --boxSizing-color: inset 0 0 10px rgba(0, 0, 0, 0.5);
}

html.darkmode,
html:not(.darkmode) {
  visibility: visible;
}

.btn-primary,
.btn-outline,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  font-family: "Noto Kufi Arabic", sans-serif;
  font-weight: 700;
  border-radius: 14px;
  cursor: pointer;
  text-decoration: none;
  border: 2px solid transparent;
  transition: transform var(--motion), box-shadow var(--motion),
    background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.btn-primary {
  background: var(--bio-green);
  color: #fff;
  padding: 0.9rem 1.7rem;
  box-shadow: 0 10px 26px rgba(22, 160, 133, 0.35);
  border: none;
}

.btn-primary:hover {
  transform: translateY(-2px);
  background: var(--bio-teal);
  color: #fff;
  box-shadow: var(--shadow-neon);
}

.btn-outline {
  background: var(--bio-card);
  color: var(--bio-green);
  border-color: var(--bio-green);
  padding: 0.8rem 1.3rem;
}

.btn-outline:hover {
  background: var(--bio-soft);
  color: var(--bio-teal);
  border-color: var(--bio-teal);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.22);
  padding: 0.85rem 1.6rem;
}

.section-pad {
  padding: var(--section-inner-space) 0;
}

.glass-card {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  filter: blur(4px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.7s cubic-bezier(0.16, 1, 0.3, 1),
    filter 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
  filter: blur(0);
}

.scroll-in {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.scroll-in.is-visible {
  opacity: 1;
  transform: none;
}

.reveal-delay-1 {
  transition-delay: 0.08s;
}

.reveal-delay-2 {
  transition-delay: 0.16s;
}

.reveal-delay-3 {
  transition-delay: 0.24s;
}

.reveal-delay-4 {
  transition-delay: 0.32s;
}

@media (prefers-reduced-motion: reduce) {
  .reveal,
  .scroll-in {
    opacity: 1;
    transform: none;
    filter: none;
    transition: none;
  }
}