/* ===== Theme system: CSS custom properties ===== */
:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-card: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --accent: #818cf8;
  --accent-hover: #6366f1;
  --accent-text: #312e81;
  --border: #e2e8f0;
  --glass-bg: rgba(255,255,255,0.7);
  --glass-border: rgba(148,163,184,0.2);
  --glass-shadow: rgba(15,23,42,0.08);
  --hero-glow-1: rgba(129,140,248,0.15);
  --hero-glow-2: rgba(139,92,246,0.08);
  --hero-glow-3: rgba(99,102,241,0.06);
  --hero-radial: rgba(129,140,248,0.06);
  --rose-bg: rgba(244,63,94,0.08);
  --rose-border: rgba(244,63,94,0.2);
  --rose-text: #9f1239;
  --emerald-bg: rgba(52,211,153,0.08);
  --emerald-border: rgba(52,211,153,0.2);
  --emerald-text: #065f46;
  --svg-stroke: #818cf8;
  --svg-stroke-alt: #a78bfa;
  --svg-fill-bg-start: #f8fafc;
  --svg-fill-bg-end: #f1f5f9;
  color-scheme: light;
}

.dark {
  --bg-primary: #020617;
  --bg-secondary: #0f172a;
  --bg-card: #1e293b;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --accent: #818cf8;
  --accent-hover: #a5b4fc;
  --accent-text: #e0e7ff;
  --border: rgba(148,163,184,0.15);
  --glass-bg: rgba(15,23,42,0.6);
  --glass-border: rgba(148,163,184,0.2);
  --glass-shadow: rgba(15,23,42,0.45);
  --hero-glow-1: rgba(129,140,248,0.2);
  --hero-glow-2: rgba(139,92,246,0.1);
  --hero-glow-3: rgba(99,102,241,0.08);
  --hero-radial: rgba(129,140,248,0.08);
  --rose-bg: rgba(244,63,94,0.1);
  --rose-border: rgba(244,63,94,0.3);
  --rose-text: #fda4af;
  --emerald-bg: rgba(52,211,153,0.1);
  --emerald-border: rgba(52,211,153,0.3);
  --emerald-text: #6ee7b7;
  --svg-stroke: #818cf8;
  --svg-stroke-alt: #a78bfa;
  --svg-fill-bg-start: #0f172a;
  --svg-fill-bg-end: #0b1120;
  color-scheme: dark;
}

/* ===== Base ===== */
body {
  font-family: "Manrope", sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: background-color 0.3s ease, color 0.3s ease;
}

.font-heading {
  font-family: "Space Grotesk", sans-serif;
}

/* ===== Skip link (a11y) ===== */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 100;
  padding: 0.75rem 1.5rem;
  border-radius: 0.75rem;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
  transition: top 0.2s;
}
.skip-link:focus {
  top: 1rem;
}

/* ===== Links ===== */
.link-underline {
  position: relative;
  text-decoration: none;
}
.link-underline::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 250ms ease;
}
.link-underline:hover::after {
  width: 100%;
}

/* ===== Glass card ===== */
.glass {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  box-shadow: 0 20px 50px var(--glass-shadow);
  backdrop-filter: blur(14px);
}

/* ===== Cards ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 1rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), 0 8px 30px var(--glass-shadow);
}

/* ===== Buttons ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.75rem 1.5rem;
  border-radius: 9999px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: 0.875rem;
  text-decoration: none;
  transition: transform 0.15s, box-shadow 0.2s, background-color 0.2s;
}
.btn-primary:hover {
  transform: scale(1.03);
  box-shadow: 0 10px 30px rgba(129,140,248,0.3);
  background: var(--accent-hover);
}
.btn-primary:active {
  transform: scale(0.98);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.75rem 1.5rem;
  border-radius: 9999px;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-weight: 600;
  font-size: 0.875rem;
  text-decoration: none;
  background: transparent;
  transition: transform 0.15s, background-color 0.2s, color 0.2s;
}
.btn-secondary:hover {
  transform: scale(1.03);
  background: var(--accent);
  color: #fff;
}
.btn-secondary:active {
  transform: scale(0.98);
}

/* ===== Tab indicator ===== */
.tab-indicator {
  transition: transform 200ms cubic-bezier(0.4, 0, 0.2, 1),
              width 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== SVG hero animation ===== */
.stage {
  opacity: 0;
  transform: translateY(6px) scale(0.98);
  animation: stageCycle 5s infinite;
}
.stage-1 { animation-delay: 0s; }
.stage-2 { animation-delay: 1.6s; }
.stage-3 { animation-delay: 3.2s; }

@keyframes stageCycle {
  0%, 18% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  26%, 100% {
    opacity: 0;
    transform: translateY(-8px) scale(0.98);
  }
}

.pulse {
  transform-origin: center;
  animation: pulseGlow 2.4s ease-in-out infinite;
}
.pulse-delay {
  animation-delay: 1.2s;
}

@keyframes pulseGlow {
  0%, 100% { opacity: 0.35; transform: scale(0.95); }
  50% { opacity: 1; transform: scale(1.05); }
}

.floaty {
  animation: floaty 6s ease-in-out infinite;
}

@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ===== Scroll reveal ===== */
body.js-enabled .reveal {
  opacity: 0;
  transform: translateY(20px);
}
body.js-enabled .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

/* ===== Step connecting line (How It Works) ===== */
.step-line {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--border);
  z-index: 0;
}

/* ===== Mobile menu ===== */
.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  width: 280px;
  height: 100%;
  z-index: 60;
  background: var(--bg-card);
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: -4px 0 30px var(--glass-shadow);
}
.mobile-menu.is-open {
  transform: translateX(0);
}
.mobile-menu-overlay {
  position: fixed;
  inset: 0;
  z-index: 55;
  background: rgba(0,0,0,0.5);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.mobile-menu-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}

/* ===== Dashboard ===== */
.dashboard-sidebar {
  width: 260px;
  min-height: calc(100vh - 72px);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
}
.dashboard-content {
  flex: 1;
  padding: 2rem;
}
.login-overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
}

/* ===== Accordion smooth height ===== */
[data-accordion-panel] {
  overflow: hidden;
  transition: max-height 0.3s ease, opacity 0.3s ease;
}
[data-accordion-panel].collapsed {
  max-height: 0;
  opacity: 0;
}

/* ===== Theme toggle icon ===== */
.theme-toggle-icon {
  transition: transform 0.3s ease;
}
.dark .theme-toggle-icon {
  transform: rotate(180deg);
}

/* ===== Reduced motion ===== */
@media (prefers-reduced-motion: reduce) {
  .stage, .pulse, .floaty {
    animation: none !important;
  }
  body.js-enabled .reveal,
  body.js-enabled .reveal.is-visible {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  .mobile-menu, .mobile-menu-overlay,
  [data-accordion-panel], .theme-toggle-icon {
    transition: none !important;
  }
}

/* ===== Focus visible ===== */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ===== Color utilities for themed content ===== */
.text-themed-accent { color: var(--accent); }
.text-themed-secondary { color: var(--text-secondary); }
.text-themed-muted { color: var(--text-muted); }
.bg-themed-primary { background: var(--bg-primary); }
.bg-themed-secondary { background: var(--bg-secondary); }
.bg-themed-card { background: var(--bg-card); }
.border-themed { border-color: var(--border); }