/* =========================================
   Audio Wave Visualizer – Docs Styles
   Light, professional, flat UI
========================================= */

:root {
  --bg-page: #f5f5f8;
  --bg-surface: #ffffff;
  --bg-soft: #f9fafb;

  --border-subtle: #e2e5ee;

  --text-main: #111827;
  --text-muted: #6b7280;
  --text-soft: #9ca3af;

  --accent: #2563eb;          /* main blue */
  --accent-soft: #e5edff;

  --accent-ko-fi: #ff5f5f;
  --accent-paypal: #0070ba;
  --accent-github: #24292e;
  --accent-download: #059669;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-pill: 999px;

  --shadow-soft: 0 10px 30px rgba(15, 23, 42, 0.08);

  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;
}

/* ========== Base ========== */

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

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-main);
  background-color: var(--bg-page);
}

/* Simple layout container */

.page {
  max-width: 980px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 3rem;
}

/* ========== Header ========== */

.site-header {
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-soft);
}

.site-header-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 1.75rem 1.5rem 2rem;
}

.site-header h1 {
  margin: 0 0 0.75rem;
  font-size: 2rem;
  line-height: 1.25;
  letter-spacing: 0.01em;
}

.tagline {
  margin: 0 0 1.5rem;
  color: var(--text-muted);
  font-size: 0.98rem;
}

/* ========== Buttons / CTAs ========== */

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;

  padding: 0.65rem 1.1rem;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  background-color: #ffffff;
  color: var(--text-main);
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;

  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
  transition:
    background-color 0.18s ease,
    border-color 0.18s ease,
    box-shadow 0.18s ease,
    transform 0.08s ease;
}

/* if you use image icons inside buttons */
.btn img {
  width: 18px;
  height: 18px;
  display: block;
}

/* generic hover */
.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.12);
}

/* specific variants */
.btn-ko-fi {
  background-color: var(--accent-ko-fi);
  border-color: var(--accent-ko-fi);
  color: #ffffff;
}

.btn-ko-fi:hover {
  background-color: #e35151;
  border-color: #e35151;
}

.btn-paypal {
  background-color: var(--accent-paypal);
  border-color: var(--accent-paypal);
  color: #ffffff;
}

.btn-paypal:hover {
  background-color: #005aa3;
  border-color: #005aa3;
}

.btn-github {
  background-color: #ffffff;
  border-color: #d1d5db;
  color: var(--accent-github);
}

.btn-github:hover {
  background-color: #f3f4f6;
  border-color: #9ca3af;
}

.btn-download {
  background-color: var(--accent-download);
  border-color: var(--accent-download);
  color: #ffffff;
}

.btn-download:hover {
  background-color: #047857;
  border-color: #047857;
}

/* ========== Sections ========== */

.section {
  margin-top: 2.5rem;
  padding: 1.75rem 1.5rem;
  background-color: var(--bg-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.03);
}

.section h2 {
  margin-top: 0;
  margin-bottom: 1rem;
  font-size: 1.35rem;
}

.section p {
  margin: 0 0 0.75rem;
  color: var(--text-main);
}

/* ========== Typography helpers ========== */

strong {
  font-weight: 600;
}

em {
  font-style: italic;
  color: var(--text-main);
}

/* Inline code and code blocks */

code {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  background-color: #111827;
  color: #e5e7eb;
  padding: 0.18em 0.35em;
  border-radius: var(--radius-sm);
}

pre code {
  display: block;
  padding: 0.9rem 1rem;
  border-radius: var(--radius-md);
  overflow-x: auto;
}

/* ========== Quick Start Steps ========== */

ol.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
}

/* individual step */
ol.steps > li {
  background-color: var(--bg-soft);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  padding: 1.4rem 1.4rem 1.2rem;
}

ol.steps > li h3 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  font-size: 1.05rem;
}

/* nested list inside step */
ol.steps > li ul {
  margin: 0.75rem 0 0;
  padding-left: 1.1rem;
  color: var(--text-muted);
}

ol.steps > li ul li + li {
  margin-top: 0.4rem;
}

/* pill for “+” icon in text */
.pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.4rem;
  height: 1.4rem;
  border-radius: var(--radius-pill);
  border: 1px solid #d1d5db;
  background-color: #ffffff;
  font-size: 0.8rem;
  font-weight: 600;
  vertical-align: middle;
}

/* ========== Screenshots / Figures ========== */

.screenshot {
  margin: 1rem 0 0;
  padding: 0.9rem;
  border-radius: var(--radius-lg);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.04);
}

.screenshot img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

.screenshot figcaption {
  margin-top: 0.6rem;
  font-size: 0.86rem;
  color: var(--text-soft);
}

/* ========== Cards (Controls section) ========== */

.section-cards {
  /* same base as section, nothing extra needed */
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.2rem;
  margin-top: 1.2rem;
}

.card {
  background-color: var(--bg-soft);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  padding: 1.15rem 1.2rem;
}

.card h3 {
  margin-top: 0;
  margin-bottom: 0.6rem;
  font-size: 1rem;
}

.card p {
  margin-bottom: 0.5rem;
  color: var(--text-main);
}

.card ul {
  margin: 0.4rem 0 0;
  padding-left: 1.1rem;
  color: var(--text-muted);
}

.card ul li + li {
  margin-top: 0.25rem;
}

/* ========== Ideas list ========== */

.ideas-list {
  margin: 0.3rem 0 0;
  padding-left: 1.2rem;
}

.ideas-list li {
  margin: 0.3rem 0;
  color: var(--text-muted);
}

/* ========== FAQ / Troubleshooting ========== */

.faq {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.faq details {
  background-color: var(--bg-soft);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  padding: 0.85rem 0.95rem;
}

.faq summary {
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  color: var(--text-main);
}

.faq summary::-webkit-details-marker {
  display: none;
}

/* optional: simple pseudo marker */
.faq summary::before {
  content: "▸";
  display: inline-block;
  margin-right: 0.45rem;
  font-size: 0.85rem;
  color: var(--text-soft);
  transition: transform 0.18s ease;
}

.faq details[open] summary::before {
  transform: rotate(90deg);
}

.faq details ul,
.faq details p {
  margin: 0.55rem 0 0;
  color: var(--text-muted);
}

/* ========== Footer ========== */

.site-footer {
  max-width: 980px;
  margin: 0 auto;
  padding: 1.25rem 1.5rem 2.25rem;
  font-size: 0.86rem;
  color: var(--text-soft);
  text-align: center;
}

/* ========== Responsive tweaks ========== */

@media (max-width: 768px) {
  .site-header-inner {
    padding: 1.4rem 1.2rem 1.75rem;
  }

  .site-header h1 {
    font-size: 1.6rem;
  }

  .tagline {
    font-size: 0.95rem;
  }

  .cta-row {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .section {
    padding: 1.4rem 1.2rem;
  }
}
/* Intro section layout with presentation image */

.intro-layout {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
}

.intro-copy {
  flex: 1 1 0;
  min-width: 0;
}

.intro-visual {
  flex: 0 0 320px;
  margin: 0;
  padding: 0.9rem;
  border-radius: 12px;
  background-color: #f9fafb;
  border: 1px solid #e5e7eb;
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.04);
  text-align: center;
}

.intro-visual img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 8px;
}

.intro-visual figcaption {
  margin-top: 0.55rem;
  font-size: 0.82rem;
  color: #6b7280;
}

/* Stack on small screens */
@media (max-width: 768px) {
  .intro-layout {
    flex-direction: column;
  }

  .intro-visual {
    width: 100%;
  }
}