/* ===== RestWave design tokens – Earthy Calm (Dark Theme) ===== */

:root {
  /* ---- Palette (WCAG AA contrast verified, dark-first) ---- */
  --color-earth-900: #1a1814;
  --color-earth-800: #2d2a24;
  --color-earth-700: #3f3a30;
  --color-earth-600: #5c5244;
  --color-earth-500: #7a6e5d;
  --color-earth-400: #a69880;
  --color-earth-300: #c4b9a6;
  --color-earth-200: #ddd5c8;
  --color-earth-100: #e6dfd1;
  --color-earth-50: #f3efe7;
  --color-white: #faf9f6;

  --color-accent-700: #3d5a2f;
  --color-accent-600: #4e7340;
  --color-accent-500: #5f8c4e;
  --color-accent-400: #6b9e5c;
  --color-accent-300: #7eb571;
  --color-accent-200: #98c98a;
  --color-accent-100: #b5dba6;
  --color-accent-50: #d3edc6;

  --color-warn: #e48a5c;
  --color-success: #7ab87e;

  /* ---- Typography ---- */
  --font-display: "Lora", "Georgia", "Times New Roman", serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "SF Mono", "Menlo", "Consolas", monospace;

  --text-xs: clamp(0.69rem, 0.66rem + 0.12vw, 0.75rem);
  --text-sm: clamp(0.81rem, 0.77rem + 0.16vw, 0.875rem);
  --text-base: clamp(0.94rem, 0.89rem + 0.22vw, 1.0625rem);
  --text-md: clamp(1.06rem, 1rem + 0.32vw, 1.25rem);
  --text-lg: clamp(1.25rem, 1.14rem + 0.5vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.34rem + 0.76vw, 1.875rem);
  --text-2xl: clamp(1.88rem, 1.62rem + 1.18vw, 2.5rem);
  --text-3xl: clamp(2.25rem, 1.88rem + 1.68vw, 3.125rem);

  --leading-tight: 1.15;
  --leading-snug: 1.35;
  --leading-normal: 1.6;
  --leading-relaxed: 1.75;

  /* ---- Spacing ---- */
  --space-xs: clamp(0.25rem, 0.21rem + 0.19vw, 0.375rem);
  --space-sm: clamp(0.5rem, 0.43rem + 0.38vw, 0.75rem);
  --space-md: clamp(0.75rem, 0.64rem + 0.56vw, 1.125rem);
  --space-lg: clamp(1.25rem, 1.07rem + 0.94vw, 1.875rem);
  --space-xl: clamp(1.75rem, 1.43rem + 1.56vw, 2.75rem);
  --space-2xl: clamp(2.5rem, 2rem + 2.5vw, 4rem);
  --space-3xl: clamp(3.5rem, 2.75rem + 3.75vw, 5.75rem);

  /* ---- Borders & Radius ---- */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --border-thin: 1px solid var(--color-earth-600);
  --border-accent: 2px solid var(--color-accent-500);

  /* ---- Shadows ---- */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.35);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.45);
  --shadow-glow: 0 0 24px rgba(107, 158, 92, 0.2);

  /* ---- Transitions ---- */
  --ease-soft: cubic-bezier(0.4, 0, 0.2, 1);
  --dur-fast: 150ms;
  --dur-normal: 250ms;
  --dur-slow: 400ms;

  /* ---- Accent HSL for range sliders ---- */
  --accent-h: 115;
  --accent-s: 23%;
  --accent-l: 53%;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-earth-100);
  background: var(--color-earth-800);
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
a { color: var(--color-accent-300); text-decoration: underline; text-underline-offset: 3px; }
a:hover { color: var(--color-accent-200); }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; line-height: var(--leading-tight); color: var(--color-earth-50); }
h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

:focus-visible {
  outline: 3px solid var(--color-accent-400);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.container {
  max-width: 1120px;
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-lg);
  font-size: var(--text-2xl);
  color: var(--color-earth-50);
}

/* ===== Buttons ===== */
.btn-primary {
  display: inline-flex; align-items: center; gap: var(--space-xs);
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-body); font-size: var(--text-base); font-weight: 600;
  color: var(--color-earth-900); background: var(--color-accent-400);
  border: none; border-radius: var(--radius-full); cursor: pointer;
  transition: background var(--dur-fast) var(--ease-soft), box-shadow var(--dur-fast) var(--ease-soft);
  text-decoration: none;
}
.btn-primary:hover { background: var(--color-accent-300); box-shadow: var(--shadow-glow); }
.btn-primary:active { background: var(--color-accent-500); }

.btn-secondary {
  display: inline-flex; align-items: center; gap: var(--space-xs);
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-body); font-size: var(--text-base); font-weight: 500;
  color: var(--color-accent-300); background: transparent;
  border: 2px solid var(--color-accent-600); border-radius: var(--radius-full); cursor: pointer;
  transition: all var(--dur-fast) var(--ease-soft);
  text-decoration: none;
}
.btn-secondary:hover { background: var(--color-accent-700); color: var(--color-accent-200); }

/* btn-hero override — darker bg for WCAG AA contrast on green */
.btn-hero {
  background: var(--color-accent-600);
  color: var(--color-earth-50);
}
.btn-hero:hover {
  background: var(--color-accent-500);
  color: var(--color-earth-50);
}

/* ===== Card ===== */
.card {
  background: var(--color-earth-700);
  border: var(--border-thin);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-lg);
}

/* ===== Header ===== */
.site-header {
  padding: var(--space-sm) 0;
  background: var(--color-earth-900);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.site-header .container {
  display: flex; align-items: baseline; gap: var(--space-md); flex-wrap: wrap;
}
.site-logo {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-white);
  text-decoration: none;
  flex-shrink: 0;
}
.site-logo span { color: var(--color-accent-300); }
.site-nav {
  display: flex; gap: var(--space-md); flex-wrap: wrap; align-items: baseline;
}
.site-nav a {
  color: var(--color-earth-300); text-decoration: none; font-size: var(--text-sm);
  font-weight: 500; transition: color var(--dur-fast); white-space: nowrap;
}
.site-nav a:hover { color: var(--color-accent-300); }
.site-tagline {
  font-size: var(--text-xs);
  color: var(--color-earth-400);
  flex-basis: 100%;
  margin-top: var(--space-xs);
}

/* ===== Footer ===== */
.site-footer {
  padding: var(--space-xl) 0;
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-earth-400);
  background: var(--color-earth-900);
}
.site-footer a { color: var(--color-accent-300); }
.site-footer a:hover { color: var(--color-accent-200); }

/* ===== Range Sliders – Earthy accent #7a9e7e ===== */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 8px;
  background: var(--color-earth-600);
  border-radius: var(--radius-full);
  outline: none;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--color-accent-400);
  border: 2px solid var(--color-accent-200);
  cursor: pointer;
  transition: background var(--dur-fast);
}
input[type="range"]::-webkit-slider-thumb:hover {
  background: var(--color-accent-300);
}
input[type="range"]::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--color-accent-400);
  border: 2px solid var(--color-accent-200);
  cursor: pointer;
}
input[type="range"]::-moz-range-progress {
  background: var(--color-accent-500);
  border-radius: var(--radius-full);
  height: 8px;
}

/* ===== Mobile ===== */
@media (max-width: 767px) {
  .container { padding-inline: var(--space-sm); }
  .site-header .container {
    flex-direction: column;
    gap: var(--space-xs);
    align-items: flex-start;
  }
  .site-nav {
    gap: var(--space-sm) var(--space-md);
    width: 100%;
    padding-top: var(--space-xs);
  }
  .site-tagline {
    margin-top: var(--space-xs);
    line-height: var(--leading-snug);
  }
}