/* ============================================================
   Prompt Nexus — Design System v2.0
   Aero Glass · Coral → Teal · Plus Jakarta Sans
   ============================================================ */

:root {
  --accent-coral: #FA5264;
  --accent-teal: #68D9B2;
  --primary: #FA5264;
  --primary-dark: #e03d50;
  --primary-soft: rgba(250, 82, 100, 0.12);
  --secondary: #68D9B2;
  --secondary-dark: #4bc49a;
  --secondary-soft: rgba(104, 217, 178, 0.14);

  --primary-gradient: linear-gradient(135deg, #FA5264 0%, #68D9B2 100%);
  --primary-gradient-h: linear-gradient(90deg, #FA5264 0%, #68D9B2 100%);
  --bg-gradient-soft:
    radial-gradient(ellipse at 10% 0%, rgba(250, 82, 100, 0.08) 0%, transparent 45%),
    radial-gradient(ellipse at 90% 10%, rgba(104, 217, 178, 0.10) 0%, transparent 45%),
    radial-gradient(ellipse at 50% 100%, rgba(250, 82, 100, 0.05) 0%, transparent 50%);

  --bg-body: #f4f6f9;
  --bg-card: #ffffff;
  --bg-muted: #f8fafc;
  --bg-elevated: #ffffff;

  --text-main: #0f172a;
  --text-heading: #0f172a;
  --text-sub: #64748b;
  --text-muted: #94a3b8;
  --text-on-primary: #ffffff;

  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-bg-strong: rgba(255, 255, 255, 0.88);
  --glass-blur: 14px;
  --glass-border: rgba(255, 255, 255, 0.65);
  --glass-border-soft: rgba(148, 163, 184, 0.22);
  --glass-shadow: 0 8px 32px rgba(15, 23, 42, 0.08);

  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.12);
  --ring-focus: 0 0 0 3px rgba(250, 82, 100, 0.25);
  --glow-primary: 0 8px 28px rgba(250, 82, 100, 0.35);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;

  --container-max: 1280px;
  --header-h: 72px;
  --bottom-nav-h: 68px;
  --z-header: 1000;
  --z-modal: 1200;
  --z-toast: 1400;
  --z-lightbox: 1500;
  --z-bottom-nav: 1100;

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
  --duration-fast: 0.18s;
  --duration: 0.3s;
  --duration-slow: 0.5s;

  --font: "Plus Jakarta Sans", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

[data-theme="dark"] {
  --bg-body: #0b1220;
  --bg-card: #141c2e;
  --bg-muted: #1a2438;
  --bg-elevated: #1c2740;
  --text-main: #e8eef8;
  --text-heading: #f8fafc;
  --text-sub: #94a3b8;
  --text-muted: #64748b;
  --glass-bg: rgba(20, 28, 46, 0.78);
  --glass-bg-strong: rgba(20, 28, 46, 0.92);
  --glass-border: rgba(148, 163, 184, 0.12);
  --glass-border-soft: rgba(148, 163, 184, 0.14);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.4);
  --bg-gradient-soft:
    radial-gradient(ellipse at 10% 0%, rgba(250, 82, 100, 0.12) 0%, transparent 45%),
    radial-gradient(ellipse at 90% 10%, rgba(104, 217, 178, 0.10) 0%, transparent 45%),
    radial-gradient(ellipse at 50% 100%, rgba(99, 102, 241, 0.08) 0%, transparent 50%);
  --primary-soft: rgba(250, 82, 100, 0.18);
}

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

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

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-main);
  background: var(--bg-body);
  background-image: var(--bg-gradient-soft);
  background-attachment: fixed;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  padding-bottom: calc(var(--bottom-nav-h) + env(safe-area-inset-bottom, 0px));
}

@media (min-width: 901px) {
  body { padding-bottom: 0; }
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: color var(--duration-fast); }
a:hover { color: var(--primary-dark); }
button { font-family: inherit; cursor: pointer; }
:focus-visible { outline: none; box-shadow: var(--ring-focus); border-radius: 4px; }

.screen-reader-text,
.skip-link {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.skip-link:focus {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 9999;
  width: auto;
  height: auto;
  margin: 0;
  clip: auto;
  padding: 12px 18px;
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 700;
}

.container {
  width: min(100% - 32px, var(--container-max));
  margin-inline: auto;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 0.9rem;
  border: 2px solid transparent;
  transition: transform var(--duration-fast) var(--ease-out), box-shadow var(--duration), background var(--duration);
}
.btn:active { transform: scale(0.98); }
.btn-primary {
  background: var(--primary-gradient);
  color: #fff;
  box-shadow: var(--glow-primary);
}
.btn-primary:hover { color: #fff; filter: brightness(1.05); }
.btn-outline {
  background: transparent;
  border-color: var(--glass-border-soft);
  color: var(--text-main);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-soft);
}
.btn-block { width: 100%; }