/**
 * @file style.css
 * @description Musonic product showcase — design tokens, layout, and component
 *   styles. Follows a mobile-first responsive approach. All colours reference
 *   CSS custom properties so theming is centralised.
 * @author DoodzProg
 * @version 0.9.4
 * @license CC-BY-NC-4.0
 */

/* ─── Design Tokens ─────────────────────────────────────────────────────────── */

:root {
  /* Colour palette — mirrors src/theme/colors.ts */
  --color-bg:            #0d0d0d;
  --color-surface:       #1a1a1a;
  --color-surface-alt:   #242424;
  --color-border:        rgba(255, 255, 255, 0.07);
  --color-accent:        #ff6b35;
  --color-accent-dark:   #cc5220;
  --color-accent-glow:   rgba(255, 107, 53, 0.18);
  --color-accent-glow-strong: rgba(255, 107, 53, 0.35);
  --color-text-primary:  #ffffff;
  --color-text-secondary: rgba(255, 255, 255, 0.55);
  --color-text-tertiary:  rgba(255, 255, 255, 0.28);

  /* Spacing scale (8-point grid) */
  --space-1:  8px;
  --space-2:  16px;
  --space-3:  24px;
  --space-4:  32px;
  --space-5:  48px;
  --space-6:  64px;
  --space-7:  96px;
  --space-8:  128px;

  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Radii */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-normal: 280ms ease;
  --transition-slow:   500ms ease;

  /* Shadows */
  --shadow-glow: 0 0 48px var(--color-accent-glow);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.5);
}

/* ─── Reset & Base ───────────────────────────────────────────────────────────── */

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

/* ─── Layout Utilities ───────────────────────────────────────────────────────── */

.container {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: 20px;
}

.section {
  padding-block: var(--space-7);
}

/* ─── Scroll-reveal Animation ────────────────────────────────────────────────── */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered delay for child elements within a reveal group */
.reveal-group .reveal:nth-child(1) { transition-delay: 0ms; }
.reveal-group .reveal:nth-child(2) { transition-delay: 80ms; }
.reveal-group .reveal:nth-child(3) { transition-delay: 160ms; }
.reveal-group .reveal:nth-child(4) { transition-delay: 240ms; }

/* ─── Navigation ─────────────────────────────────────────────────────────────── */

.nav {
  position: fixed;
  top: 0;
  inset-inline: 0;
  z-index: 100;
  padding-block: var(--space-2);
  background-color: rgba(13, 13, 13, 0);
  border-bottom: 1px solid rgba(255, 255, 255, 0);
  transition: background-color var(--transition-normal),
              border-color var(--transition-normal);
}

/* JS adds this class on scroll */
.nav.scrolled {
  background-color: rgba(13, 13, 13, 0.88);
  border-bottom-color: var(--color-border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav__logo {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.nav__name {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.4px;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav__link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.nav__link:hover {
  color: var(--color-text-primary);
}

.nav__cta {
  padding: 8px 18px;
  background-color: var(--color-accent);
  color: #fff;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 700;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.nav__cta:hover {
  background-color: var(--color-accent-dark);
  transform: translateY(-1px);
}

/* ─── Hero Section ───────────────────────────────────────────────────────────── */

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  overflow: hidden;
}

/* Radial ambient glow behind hero content */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 50% 0%, var(--color-accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-5);
  width: 100%;
  padding-block: var(--space-7);
}

/* Hero two-column layout on desktop */
.hero__content {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero__mockup {
  position: relative;
  flex-shrink: 0;
}

@media (min-width: 900px) {
  .hero__inner {
    flex-direction: row;
    align-items: center;
    text-align: left;
    gap: var(--space-6);
  }
  .hero__content {
    flex: 1;
    align-items: flex-start;
  }
  .hero__actions {
    justify-content: flex-start;
  }
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background-color: var(--color-accent-glow);
  border: 1px solid var(--color-accent-glow-strong);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.6px;
  text-transform: uppercase;
}

.hero__badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.8); }
}

.hero__headline {
  font-size: clamp(42px, 8vw, 80px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -2px;
  max-width: 800px;
}

.hero__headline-accent {
  color: var(--color-accent);
}

.hero__subline {
  font-size: clamp(16px, 2.5vw, 20px);
  color: var(--color-text-secondary);
  max-width: 520px;
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
}

/* ─── Buttons ────────────────────────────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 100px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: transform var(--transition-fast),
              background-color var(--transition-fast),
              box-shadow var(--transition-fast);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--primary {
  background-color: var(--color-accent);
  color: #fff;
  box-shadow: 0 4px 24px var(--color-accent-glow-strong);
}

.btn--primary:hover {
  background-color: var(--color-accent-dark);
  box-shadow: 0 8px 32px var(--color-accent-glow-strong);
}

.btn--secondary {
  background-color: var(--color-surface);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn--secondary:hover {
  background-color: var(--color-surface-alt);
}

.btn__icon {
  width: 18px;
  height: 18px;
}

/* ─── Phone Mockup ───────────────────────────────────────────────────────────── */

.phone-frame {
  width: 240px;
  background: #000;
  border-radius: 28px;
  padding: 10px;
  box-shadow:
    0 40px 80px rgba(0, 0, 0, 0.8),
    0 0 60px var(--color-accent-glow),
    inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.phone-frame__img {
  width: 100%;
  display: block;
  border-radius: 20px;
}

/* ─── Feature Cards ──────────────────────────────────────────────────────────── */

.features {
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.features__header {
  text-align: center;
  margin-bottom: var(--space-6);
}

.section-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}

.section-title {
  font-size: clamp(28px, 5vw, 44px);
  font-weight: 900;
  letter-spacing: -1px;
  line-height: 1.1;
}

.section-subtitle {
  margin-top: var(--space-2);
  font-size: 17px;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin-inline: auto;
}

.features__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

@media (min-width: 640px) {
  .features__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .features__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  transition: border-color var(--transition-normal),
              transform var(--transition-normal),
              box-shadow var(--transition-normal);
}

.feature-card:hover {
  border-color: var(--color-accent-glow-strong);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card), 0 0 32px var(--color-accent-glow);
}

.feature-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background-color: var(--color-accent-glow);
  border: 1px solid var(--color-accent-glow-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-3);
}

.feature-card__icon svg {
  width: 22px;
  height: 22px;
  color: var(--color-accent);
  flex-shrink: 0;
}

.feature-card__title {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: var(--space-1);
  letter-spacing: -0.3px;
}

.feature-card__desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ─── Setup Section ──────────────────────────────────────────────────────────── */

.setup {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.setup__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

@media (min-width: 860px) {
  .setup__inner {
    flex-direction: row;
    align-items: center;
  }
}

.setup__text {
  flex: 1;
}

.setup__steps {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.step {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background-color: var(--color-surface-alt);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.step__number {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: #fff;
  font-size: 13px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step__content {
  flex: 1;
}

.step__title {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 2px;
}

.step__desc {
  font-size: 13px;
  color: var(--color-text-secondary);
}

/* ─── Stack Section ──────────────────────────────────────────────────────────── */

.stack {
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.stack__header {
  text-align: center;
  margin-bottom: var(--space-5);
}

.stack__badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.badge:hover {
  color: var(--color-text-primary);
  border-color: rgba(255, 255, 255, 0.2);
}

.badge__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ─── Language Switcher ──────────────────────────────────────────────────────── */

.lang-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: 100px;
  background: transparent;
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.lang-btn:hover {
  border-color: rgba(255, 255, 255, 0.2);
}

.lang-sep {
  font-size: 11px;
  color: var(--color-text-tertiary);
}

.lang-opt {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--color-text-tertiary);
  transition: color var(--transition-fast);
}

.lang-opt.active {
  color: var(--color-text-primary);
}

/* ─── Screenshots Section ────────────────────────────────────────────────────── */

.screenshots {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.screenshots__header {
  text-align: center;
  margin-bottom: 0;
}

/* Tab pills */
.scr-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-top: var(--space-5);
  margin-bottom: 0;
}

.scr-tab {
  padding: 8px 20px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--color-border);
  background: var(--color-surface-alt);
  color: var(--color-text-secondary);
  transition: background-color var(--transition-fast),
              color var(--transition-fast),
              border-color var(--transition-fast);
}

.scr-tab:hover {
  color: var(--color-text-primary);
  border-color: rgba(255, 255, 255, 0.2);
}

.scr-tab.active {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

/* Panels */
.scr-panel {
  display: none;
}

.scr-panel.active {
  display: block;
}

/* Outer scrollable wrapper — large padding lets box-shadow bleed without clip */
.scr-strip-outer {
  overflow-x: auto;
  padding: 80px 40px 60px;
  scrollbar-width: thin;
  scrollbar-color: var(--color-accent) transparent;
  -webkit-overflow-scrolling: touch;
}

.scr-strip-outer::-webkit-scrollbar {
  height: 4px;
}

.scr-strip-outer::-webkit-scrollbar-track {
  background: transparent;
}

.scr-strip-outer::-webkit-scrollbar-thumb {
  background: var(--color-accent);
  border-radius: 4px;
}

/* Inner strip — no overflow so box-shadows and transforms aren't clipped */
.scr-strip {
  display: flex;
  gap: var(--space-3);
  scroll-snap-type: x mandatory;
}

/* Individual phone frame */
.scr-frame {
  flex-shrink: 0;
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}

.scr-frame img {
  width: 180px;
  height: 390px;
  object-fit: cover;
  object-position: top;
  border-radius: 28px;
  border: 2px solid rgba(255, 255, 255, 0.1);
  box-shadow:
    0 24px 64px rgba(0, 0, 0, 0.6),
    0 0 0 1px rgba(0, 0, 0, 0.4);
  transition: transform var(--transition-normal),
              box-shadow var(--transition-normal);
  display: block;
}

.scr-frame:hover img {
  transform: translateY(-8px);
  box-shadow:
    0 36px 80px rgba(0, 0, 0, 0.7),
    0 0 40px var(--color-accent-glow),
    0 0 0 1px rgba(255, 107, 53, 0.2);
}

.scr-frame figcaption {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-tertiary);
  letter-spacing: 0.4px;
}

/* ─── CTA Banner ─────────────────────────────────────────────────────────────── */

.cta-banner {
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.cta-banner__inner {
  max-width: 640px;
  margin-inline: auto;
  padding-block: var(--space-7);
}

.cta-banner__title {
  font-size: clamp(28px, 5vw, 44px);
  font-weight: 900;
  letter-spacing: -1px;
  line-height: 1.1;
  margin-bottom: var(--space-3);
}

.cta-banner__sub {
  color: var(--color-text-secondary);
  font-size: 16px;
  margin-bottom: var(--space-4);
}

.cta-banner__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
}

/* ─── Made-by Badge ──────────────────────────────────────────────────────────── */

.made-by {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 200;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px 5px 5px;
  background: rgba(18, 18, 18, 0.82);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  font-size: 12px;
  font-weight: 500;
  color: var(--color-text-tertiary);
  text-decoration: none;
  opacity: 0.55;
  transition: opacity var(--transition-fast), border-color var(--transition-fast);
}

.made-by:hover {
  opacity: 1;
  border-color: rgba(255, 255, 255, 0.18);
}

.made-by__avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: block;
  flex-shrink: 0;
  object-fit: cover;
}

.made-by__name {
  color: var(--color-text-secondary);
  font-weight: 700;
}

.made-by__sep {
  color: var(--color-text-tertiary);
  font-weight: 400;
}

/* ─── Footer ─────────────────────────────────────────────────────────────────── */

.footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-5);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  text-align: center;
}

@media (min-width: 640px) {
  .footer__inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer__logo {
  width: 28px;
  height: 28px;
  border-radius: 7px;
}

.footer__name {
  font-size: 16px;
  font-weight: 800;
}

.footer__meta {
  font-size: 13px;
  color: var(--color-text-tertiary);
}

.footer__links {
  display: flex;
  gap: var(--space-3);
}

.footer__link {
  font-size: 13px;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--color-text-primary);
}