/* ==========================================================================
   MARSA ALAM FREEDIVERS — BASE STYLES
   Design tokens, reset, typography, and layout utilities.
   ========================================================================== */

/* -----------------------------
   Design Tokens
------------------------------ */
:root {
  /* Brand colors */
  --color-primary: #003B73;      /* deep ocean navy   */
  --color-secondary: #0077B6;    /* mid reef blue     */
  --color-accent: #00B4D8;       /* surface turquoise */
  --color-bg: #F7FBFC;           /* page background   */
  --color-light: #CAF0F8;        /* pale water tint   */
  --color-text: #0B1F33;         /* body text         */

  /* Derived surfaces */
  --color-white: #ffffff;
  --color-ink-70: rgba(11, 31, 51, 0.7);
  --color-ink-50: rgba(11, 31, 51, 0.5);
  --color-line: rgba(11, 31, 51, 0.1);

  /* Glass / depth surfaces */
  --glass-bg: rgba(247, 251, 252, 0.6);
  --glass-bg-dark: rgba(0, 59, 115, 0.45);
  --glass-border: rgba(255, 255, 255, 0.25);
  --shadow-soft: 0 20px 60px rgba(0, 59, 115, 0.12);
  --shadow-strong: 0 30px 80px rgba(0, 59, 115, 0.28);

  /* Gradients — the site's recurring "depth" gradient, surface to abyss */
  --gradient-depth: linear-gradient(180deg, #00B4D8 0%, #0077B6 45%, #003B73 100%);
  --gradient-depth-h: linear-gradient(90deg, #00B4D8 0%, #0077B6 50%, #003B73 100%);
  --gradient-glass: linear-gradient(180deg, rgba(255,255,255,0.35), rgba(255,255,255,0.05));

  /* Typography */
  --font-display: 'Manrope', sans-serif;
  --font-body: 'Poppins', sans-serif;

  --fs-hero: clamp(2.6rem, 6vw, 5.4rem);
  --fs-h1: clamp(2.2rem, 4.4vw, 3.6rem);
  --fs-h2: clamp(1.8rem, 3.2vw, 2.6rem);
  --fs-h3: clamp(1.25rem, 2vw, 1.6rem);
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --fs-eyebrow: 0.8rem;

  /* Spacing scale */
  --space-3xs: 0.25rem;
  --space-2xs: 0.5rem;
  --space-xs: 0.75rem;
  --space-sm: 1.25rem;
  --space-md: 2rem;
  --space-lg: 3.5rem;
  --space-xl: 6rem;
  --space-2xl: 9rem;

  /* Layout */
  --container-max: 1240px;
  --radius-sm: 10px;
  --radius-md: 20px;
  --radius-lg: 32px;
  --radius-pill: 999px;

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 0.25s;
  --dur-med: 0.5s;
  --dur-slow: 0.9s;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

body, h1, h2, h3, h4, p, figure, blockquote, dl, dd {
  margin: 0;
}

ul[class], ol[class] { list-style: none; margin: 0; padding: 0; }

img, picture, svg { display: block; max-width: 100%; }

button, input, select, textarea { font: inherit; color: inherit; }

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

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  font-size: var(--fs-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--color-primary);
  line-height: 1.12;
  font-weight: 800;
  letter-spacing: -0.02em;
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }

p { color: var(--color-ink-70); }

::selection { background: var(--color-accent); color: var(--color-white); }

/* Visible focus state for accessibility */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* -----------------------------
   Layout utilities
------------------------------ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

.section {
  padding-block: var(--space-xl);
  position: relative;
}

.section--tight { padding-block: var(--space-lg); }

.section--dark {
  background: var(--gradient-depth);
  color: var(--color-white);
}
.section--dark h1, .section--dark h2, .section--dark h3 { color: var(--color-white); }
.section--dark p { color: rgba(255,255,255,0.78); }

.section--tint { background: var(--color-light); }

.grid {
  display: grid;
  gap: var(--space-md);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 980px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }

/* -----------------------------
   Typographic helpers
------------------------------ */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--fs-eyebrow);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-secondary);
  margin-bottom: var(--space-sm);
}

.eyebrow::before {
  content: '';
  width: 28px;
  height: 2px;
  background: var(--color-accent);
  display: inline-block;
}

.section--dark .eyebrow { color: var(--color-light); }
.section--dark .eyebrow::before { background: var(--color-light); }

.section-head {
  max-width: 640px;
  margin-bottom: var(--space-lg);
}

.section-head--center {
  margin-inline: auto;
  text-align: center;
}

.text-lead {
  font-size: 1.15rem;
  color: var(--color-ink-70);
}

.text-center { text-align: center; }
.text-muted { color: var(--color-ink-50); }

/* -----------------------------
   Placeholder media blocks
   (marks where real photography/video will be dropped in)
------------------------------ */
.media-placeholder {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: transparent;
  color: rgba(255,255,255,0.85);
  border-radius: var(--radius-md);
  overflow: hidden;
  min-height: 220px;
  isolation: isolate;
}

.media-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: none;
  z-index: -1;
}

.media-placeholder span {
  font-family: var(--font-display);
  font-size: var(--fs-small);
  font-weight: 600;
  letter-spacing: 0.03em;
  padding: 0;
  border: none;
  border-radius: 0;
  max-width: 90%;
  width: 90%;
  height: 90%;
  display: block;
  overflow: hidden;
}

.media-placeholder span img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* -----------------------------
   Reveal-on-scroll utility
   (JS toggles .is-visible via IntersectionObserver)
------------------------------ */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}
[data-reveal="fade"] { transform: none; }
[data-reveal].is-visible[data-reveal-delay="1"] { transition-delay: 0.1s; }
[data-reveal].is-visible[data-reveal-delay="2"] { transition-delay: 0.2s; }
[data-reveal].is-visible[data-reveal-delay="3"] { transition-delay: 0.3s; }
[data-reveal].is-visible[data-reveal-delay="4"] { transition-delay: 0.4s; }