/* ============================================================
   Smart File Organizer — Website Stylesheet
   Dark-mode-first with clean light mode toggle
   ============================================================ */

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

/* --- Theme Variables --- */
:root {
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-xs: 0.75rem;
  --font-sm: 0.875rem;
  --font-base: 1rem;
  --font-lg: 1.125rem;
  --font-xl: 1.25rem;
  --font-2xl: 1.5rem;
  --font-3xl: 2rem;
  --font-4xl: 2.75rem;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: 0.2s ease;
  --transition-slow: 0.35s ease;
}

/* ---- DARK (default) ---- */
[data-theme="dark"] {
  --bg: #0b0e13;
  --bg-raised: #12161d;
  --bg-card: #171c25;
  --bg-card-hover: #1c2230;
  --border: #232a37;
  --border-light: #1e2431;
  --text: #e8ecf2;
  --text-secondary: #9aa3b4;
  --text-muted: #6b7585;
  --accent: #7c6bfa;
  --accent-hover: #6a56f0;
  --accent-soft: rgba(124, 107, 250, 0.12);
  --accent-text: #a699ff;
  --hero-gradient: linear-gradient(180deg, #0f1219 0%, #0b0e13 100%);
  --card-shadow: none;
  --card-shadow-hover: 0 4px 24px rgba(0, 0, 0, 0.3);
  --frame-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
  --download-bg: #12161d;
  --download-border: #232a37;
  --nav-bg: rgba(11, 14, 19, 0.88);
  --footer-bg: #080a0f;
}

/* ---- LIGHT ---- */
[data-theme="light"] {
  --bg: #f5f6f9;
  --bg-raised: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f9f9fc;
  --border: #e0e3ea;
  --border-light: #ebedf2;
  --text: #1a1d2b;
  --text-secondary: #5f6679;
  --text-muted: #9399a8;
  --accent: #6c5ce7;
  --accent-hover: #5a48d5;
  --accent-soft: rgba(108, 92, 231, 0.08);
  --accent-text: #6c5ce7;
  --hero-gradient: linear-gradient(180deg, #eeedf5 0%, #f5f6f9 100%);
  --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 4px 16px rgba(0, 0, 0, 0.04);
  --card-shadow-hover: 0 2px 6px rgba(0, 0, 0, 0.06), 0 8px 30px rgba(0, 0, 0, 0.07);
  --frame-shadow: 0 4px 20px rgba(0, 0, 0, 0.08), 0 12px 48px rgba(0, 0, 0, 0.06);
  --download-bg: #1a1d2b;
  --download-border: #2c3040;
  --nav-bg: rgba(245, 246, 249, 0.9);
  --footer-bg: #1a1d2b;
}

/* --- Base --- */
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-base);
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background var(--transition-slow), color var(--transition-slow);
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { border: none; background: none; cursor: pointer; font-family: inherit; }
ul { list-style: none; }

.container {
  width: 100%;
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 80px);
}

/* --- Section Header --- */
.section-header {
  text-align: center;
  max-width: 48%;
  min-width: 320px;
  margin: 0 auto 56px;
}

.section-header h2 {
  font-size: var(--font-3xl);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 14px;
  letter-spacing: -0.025em;
}

.section-header p {
  font-size: var(--font-lg);
  color: var(--text-secondary);
  line-height: 1.7;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: var(--font-sm);
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-lg {
  padding: 14px 28px;
  font-size: var(--font-base);
  border-radius: var(--radius-md);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 2px 10px rgba(124, 107, 250, 0.3);
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 4px 20px rgba(124, 107, 250, 0.4);
  transform: translateY(-1px);
}

.btn-ghost {
  color: var(--text-secondary);
  border: 1.5px solid var(--border);
  background: transparent;
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent-text);
}

/* Navbar download button */
.btn-download-nav {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 16px;
  font-size: var(--font-sm);
  font-weight: 600;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  white-space: nowrap;
  text-decoration: none;
  line-height: 1.4;
}

.btn-download-nav:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}

.navbar.scrolled {
  border-bottom-color: var(--border);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: var(--font-lg);
  color: var(--text);
}

.navbar-icon {
  width: 26px;
  height: 26px;
  color: var(--accent);
}

.navbar-logo {
  width: 28px;
  height: 28px;
  object-fit: contain;
}

.navbar-links a.nav-active {
  color: var(--text);
}

.navbar-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.navbar-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.navbar-links a {
  font-size: var(--font-sm);
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
}

.navbar-links a:hover {
  color: var(--text);
}

/* Theme Toggle */
.theme-toggle {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--text-secondary);
  transition: all var(--transition);
  background: var(--accent-soft);
}

.theme-toggle:hover {
  color: var(--accent-text);
  background: var(--accent-soft);
}

[data-theme="dark"] .theme-icon-moon { display: none; }
[data-theme="light"] .theme-icon-sun { display: none; }

/* Mobile nav */
.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.navbar-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  padding: 130px 0 80px;
  background: var(--hero-gradient);
  overflow: hidden;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 56px;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  padding: 5px 14px;
  background: var(--accent-soft);
  color: var(--accent-text);
  font-size: var(--font-xs);
  font-weight: 600;
  border-radius: 50px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 18px;
}

.hero-title {
  font-size: var(--font-4xl);
  font-weight: 800;
  line-height: 1.12;
  color: var(--text);
  letter-spacing: -0.03em;
  margin-bottom: 18px;
}

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

.hero-subtitle {
  font-size: var(--font-lg);
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 28px;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.hero-note {
  font-size: var(--font-sm);
  color: var(--text-muted);
}

/* Hero Screenshot */
.hero-screenshot-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--frame-shadow);
  border: 1px solid var(--border);
  transition: box-shadow var(--transition-slow), border-color var(--transition-slow);
}

.screenshot-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition-slow);
}

.screenshot-dots {
  display: flex;
  gap: 6px;
}

.screenshot-dots span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.screenshot-dots span:nth-child(1) { background: #ef4444; }
.screenshot-dots span:nth-child(2) { background: #f59e0b; }
.screenshot-dots span:nth-child(3) { background: #22c55e; }

.screenshot-bar-title {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 500;
}

.hero-screenshot,
.screenshot-img {
  width: 100%;
  display: block;
}

/* ============================================================
   FEATURES
   ============================================================ */
.features {
  padding: 88px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  padding: 28px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--card-shadow);
  transition: all 0.3s ease;
}

.feature-card:hover {
  border-color: var(--accent);
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-2px);
}

.feature-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  color: var(--accent-text);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: var(--font-base);
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.feature-card p {
  font-size: var(--font-sm);
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ============================================================
   SHOWCASE
   ============================================================ */
.showcase {
  padding: 88px 0;
  background: var(--bg-raised);
  transition: background var(--transition-slow);
}

.showcase-block {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 56px;
  align-items: center;
  margin-bottom: 80px;
}

.showcase-block:last-child {
  margin-bottom: 0;
}

.showcase-block.reverse {
  grid-template-columns: 1fr 1.25fr;
}

.showcase-block.reverse .showcase-screenshot {
  order: 2;
}

.showcase-block.reverse .showcase-text {
  order: 1;
}

.screenshot-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--frame-shadow);
  border: 1px solid var(--border);
  transition: box-shadow var(--transition-slow), border-color var(--transition-slow);
}

.showcase-label {
  font-size: var(--font-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-text);
  margin-bottom: 10px;
}

.showcase-text h3 {
  font-size: var(--font-2xl);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}

.showcase-text p {
  font-size: var(--font-sm);
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 20px;
}

.showcase-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.showcase-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: var(--font-sm);
  color: var(--text-secondary);
  line-height: 1.5;
}

.showcase-list li::before {
  content: '';
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-top: 1px;
  border-radius: 50%;
  background: var(--accent-soft);
  background-image: url("data:image/svg+xml,%3Csvg width='10' height='10' viewBox='0 0 10 10' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M2 5l2.5 2.5L8 3' stroke='%237c6bfa' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
}

/* ============================================================
   STORY (Why I Built This)
   ============================================================ */
.story {
  padding: 88px 0;
}

.story-header h2 {
  font-size: var(--font-3xl);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 32px;
  letter-spacing: -0.025em;
}

.story-body {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 56px;
  align-items: start;
}

.story-text p {
  font-size: var(--font-sm);
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 18px;
}

.story-text p:last-child {
  margin-bottom: 0;
}

.story-values {
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: sticky;
  top: 100px;
}

.story-value-card {
  padding: 22px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--card-shadow);
  transition: all 0.3s ease;
}

.story-value-card:hover {
  border-color: var(--accent);
  box-shadow: var(--card-shadow-hover);
}

.story-value-num {
  font-size: var(--font-xs);
  font-weight: 700;
  color: var(--accent-text);
  margin-bottom: 6px;
  display: block;
}

.story-value-card h4 {
  font-size: var(--font-base);
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.story-value-card p {
  font-size: var(--font-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ============================================================
   DOWNLOAD
   ============================================================ */
.download {
  padding: 88px 0;
  background: var(--bg-raised);
  transition: background var(--transition-slow);
}

.download-box {
  padding: 52px;
  background: var(--download-bg);
  border: 1px solid var(--download-border);
  border-radius: var(--radius-xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.download-box::before {
  content: '';
  position: absolute;
  top: -60%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(124, 107, 250, 0.1) 0%, transparent 65%);
  pointer-events: none;
}

.download-content {
  position: relative;
  z-index: 1;
}

.download-content h2 {
  font-size: var(--font-3xl);
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

[data-theme="light"] .download-content h2 {
  color: #fff;
}

.download-content p {
  font-size: var(--font-base);
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.7;
  margin-bottom: 28px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.download-actions {
  margin-bottom: 20px;
}

.download-btn {
  background: #fff;
  color: #1a1d2b;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
}

.download-btn:hover {
  background: #f0f0ff;
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}

.download-meta {
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
}

.download-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--font-xs);
  color: rgba(255, 255, 255, 0.4);
}

/* ============================================================
   FAQ
   ============================================================ */
.faq {
  padding: 88px 0;
}

.faq-list {
  max-width: 680px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-item:first-child {
  border-top: 1px solid var(--border);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  font-size: var(--font-sm);
  font-weight: 600;
  color: var(--text);
  text-align: left;
  transition: color var(--transition);
}

.faq-question:hover {
  color: var(--accent-text);
}

.faq-chevron {
  flex-shrink: 0;
  transition: transform 0.3s ease;
  color: var(--text-muted);
}

.faq-item.open .faq-chevron {
  transform: rotate(180deg);
}

.faq-answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s ease, padding 0.35s ease;
  overflow: hidden;
  padding-bottom: 0;
}

.faq-answer > * {
  overflow: hidden;
  min-height: 0;
}

.faq-item.open .faq-answer {
  grid-template-rows: 1fr;
  padding-bottom: 18px;
}

.faq-answer p {
  font-size: var(--font-sm);
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--footer-bg);
  padding: 48px 0 0;
  color: rgba(255, 255, 255, 0.6);
  transition: background var(--transition-slow);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 48px;
  padding-bottom: 36px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: var(--font-lg);
  color: #fff;
  margin-bottom: 10px;
}

.footer-logo .navbar-icon {
  color: var(--accent);
}

.footer-brand p {
  font-size: var(--font-sm);
  line-height: 1.7;
  max-width: 340px;
  color: rgba(255, 255, 255, 0.4);
}

.footer-links {
  display: flex;
  gap: 56px;
}

.footer-col h4 {
  font-size: var(--font-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.3);
  margin-bottom: 14px;
}

.footer-col li { margin-bottom: 8px; }

.footer-col a {
  font-size: var(--font-sm);
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--transition);
}

.footer-col a:hover { color: #fff; }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 18px 0;
  text-align: center;
}

.footer-bottom p {
  font-size: var(--font-xs);
  color: rgba(255, 255, 255, 0.25);
}

/* ============================================================
   GUIDE PAGE
   ============================================================ */
.guide-hero {
  padding: 120px 0 48px;
  text-align: center;
}

.guide-hero h1 {
  font-size: var(--font-3xl);
  font-weight: 800;
  color: var(--text);
  margin-bottom: 14px;
  letter-spacing: -0.03em;
}

.guide-hero > .container > p {
  font-size: var(--font-lg);
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 580px;
  margin: 0 auto 32px;
}

.guide-toc {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.guide-toc a {
  display: inline-block;
  padding: 7px 18px;
  font-size: var(--font-sm);
  font-weight: 500;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: 50px;
  transition: all var(--transition);
}

.guide-toc a:hover {
  border-color: var(--accent);
  color: var(--accent-text);
  background: var(--accent-soft);
}

/* Guide Sections */
.guide-section {
  padding: 72px 0;
}

.guide-section.alt {
  background: var(--bg-raised);
  transition: background var(--transition-slow);
}

.guide-block {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 56px;
  align-items: start;
}

.guide-block.reverse {
  grid-template-columns: 1fr 1.1fr;
}

.guide-block.reverse .guide-screenshot {
  order: 2;
}

.guide-block.reverse .guide-content {
  order: 1;
}

.guide-screenshot {
  position: sticky;
  top: 80px;
  min-width: 0;
}

.guide-content {
  min-width: 0;
  overflow: hidden;
}

.guide-label {
  font-size: var(--font-xs);
  font-weight: 700;
  color: var(--accent-text);
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.guide-content h2 {
  font-size: var(--font-2xl);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}

.guide-desc {
  font-size: var(--font-sm);
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 28px;
  text-align: left;
  word-spacing: normal;
}

.guide-content h3 {
  font-size: var(--font-base);
  font-weight: 600;
  color: var(--text);
  margin-bottom: 14px;
}

.guide-steps {
  list-style: none;
  counter-reset: guide-step;
  margin: 0 0 28px 0;
  padding: 0;
}

.guide-steps > li {
  counter-increment: guide-step;
  position: relative;
  padding-left: 40px;
  padding-bottom: 14px;
  font-size: var(--font-sm);
  color: var(--text-secondary);
  line-height: 1.75;
}

.guide-steps > li:last-child {
  padding-bottom: 0;
}

.guide-steps > li::before {
  content: counter(guide-step);
  position: absolute;
  left: 0;
  top: 1px;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  color: var(--accent-text);
  font-size: 11px;
  font-weight: 700;
  border-radius: 50%;
}

.guide-steps > li strong {
  color: var(--text);
}

.guide-steps > li > ul {
  margin-top: 10px;
  padding: 0;
  list-style: none;
}

.guide-steps > li > ul > li {
  position: relative;
  padding-left: 16px;
  padding-bottom: 6px;
  font-size: var(--font-sm);
  color: var(--text-secondary);
  line-height: 1.75;
}

.guide-steps > li > ul > li:last-child {
  padding-bottom: 0;
}

.guide-steps > li > ul > li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

.guide-steps > li > ul > li strong {
  color: var(--text);
}

.guide-example {
  padding: 20px 24px;
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-bottom: 20px;
  overflow: hidden;
}

.guide-example h4 {
  font-size: var(--font-sm);
  font-weight: 600;
  color: var(--accent-text);
  margin: 0 0 6px 0;
}

.guide-example p {
  font-size: var(--font-sm);
  color: var(--text-secondary);
  line-height: 1.75;
  margin: 0;
  word-break: break-word;
  overflow-wrap: break-word;
}

.guide-tip {
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: var(--font-sm);
  color: var(--text-secondary);
  line-height: 1.75;
  box-shadow: var(--card-shadow);
  margin-bottom: 20px;
  word-break: break-word;
  overflow-wrap: break-word;
}

.guide-tip strong {
  color: var(--accent-text);
}

.guide-note {
  padding: 20px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--card-shadow);
  margin-bottom: 20px;
  overflow: hidden;
}

.guide-note h4 {
  font-size: var(--font-sm);
  font-weight: 600;
  color: var(--text);
  margin: 0 0 10px 0;
}

.guide-note p {
  font-size: var(--font-sm);
  color: var(--text-secondary);
  line-height: 1.75;
  margin: 0 0 12px 0;
  word-break: break-word;
  overflow-wrap: break-word;
}

.guide-note p:last-child {
  margin-bottom: 0;
}

.guide-options {
  list-style: none;
  margin: 0 0 24px 0;
  padding: 0;
}

.guide-options > li {
  position: relative;
  padding-left: 16px;
  padding-bottom: 12px;
  font-size: var(--font-sm);
  color: var(--text-secondary);
  line-height: 1.75;
}

.guide-options > li:last-child {
  padding-bottom: 0;
}

.guide-options > li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.guide-options > li strong {
  color: var(--text);
}

/* Guide responsive */
@media (max-width: 900px) {
  .guide-block,
  .guide-block.reverse {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .guide-block.reverse .guide-screenshot { order: 0; }
  .guide-block.reverse .guide-content { order: 0; }

  .guide-screenshot { position: static; }
}

@media (max-width: 640px) {
  .guide-hero { padding: 100px 0 36px; }
  .guide-hero h1 { font-size: var(--font-2xl); }
  .guide-section { padding: 48px 0; }
  .guide-toc { gap: 8px; }
  .guide-toc a { padding: 6px 14px; font-size: var(--font-xs); }
}

/* ============================================================
   FEEDBACK PAGE
   ============================================================ */
.feedback-page {
  padding: 120px 0 80px;
  min-height: calc(100vh - 200px);
}

.feedback-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 56px;
  align-items: start;
}

.feedback-intro h1 {
  font-size: var(--font-3xl);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 14px;
  letter-spacing: -0.025em;
}

.feedback-intro > p {
  font-size: var(--font-base);
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
}

.feedback-channels {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 28px;
}

.feedback-channel {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--card-shadow);
}

.feedback-channel svg {
  flex-shrink: 0;
  color: var(--accent-text);
  margin-top: 2px;
}

.feedback-channel strong {
  display: block;
  font-size: var(--font-sm);
  font-weight: 600;
  color: var(--text);
  margin-bottom: 2px;
}

.feedback-channel span {
  font-size: var(--font-xs);
  color: var(--text-muted);
}

.feedback-alt {
  font-size: var(--font-sm);
  color: var(--text-muted);
}

.feedback-alt a {
  color: var(--accent-text);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.feedback-alt a:hover {
  color: var(--accent);
}

/* Form */
.feedback-form-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--card-shadow);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: var(--font-sm);
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.form-optional {
  font-weight: 400;
  color: var(--text-muted);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  font-size: var(--font-sm);
  font-family: var(--font-family);
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-group select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='12' viewBox='0 0 12 12' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M3 5l3 3 3-3' stroke='%239399a8' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

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

/* Success state */
.feedback-success {
  text-align: center;
  padding: 40px 20px;
  color: var(--accent-text);
}

.feedback-success svg {
  margin: 0 auto 16px;
}

.feedback-success h3 {
  font-size: var(--font-xl);
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.feedback-success p {
  font-size: var(--font-sm);
  color: var(--text-secondary);
  margin-bottom: 20px;
}

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes spin {
  to { transform: rotate(360deg); }
}

.spin {
  animation: spin 0.8s linear infinite;
}

.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered delay for cards */
.feature-card:nth-child(1) { transition-delay: 0s; }
.feature-card:nth-child(2) { transition-delay: 0.06s; }
.feature-card:nth-child(3) { transition-delay: 0.12s; }
.feature-card:nth-child(4) { transition-delay: 0.18s; }
.feature-card:nth-child(5) { transition-delay: 0.24s; }
.feature-card:nth-child(6) { transition-delay: 0.30s; }

/* ============================================================
   RESPONSIVE
   ============================================================ */

/* -- Tablet landscape / half-screen desktop (below 900px) -- */
@media (max-width: 900px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-title { font-size: var(--font-3xl); }
  .hero-visual { max-width: 680px; }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .showcase-block,
  .showcase-block.reverse {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .showcase-block.reverse .showcase-screenshot { order: 0; }
  .showcase-block.reverse .showcase-text { order: 0; }

  .story-body {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .story-values { position: static; }

  .footer-inner { grid-template-columns: 1fr; gap: 28px; }

  .feedback-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

/* -- Tablet portrait / small laptop (below 768px) -- */
@media (max-width: 768px) {
  .navbar-links { gap: 16px; }

  .btn-download-nav span { display: none; }
  .btn-download-nav { padding: 7px 10px; }

  .hero-title { font-size: var(--font-2xl); }
  .hero-subtitle { font-size: var(--font-base); max-width: 100%; }

  .section-header h2 { font-size: var(--font-2xl); }

  .features-grid { grid-template-columns: 1fr; }

  .showcase-text h3 { font-size: var(--font-xl); }
  .story-header h2 { font-size: var(--font-2xl); }

  .download-box { padding: 40px 28px; }
}

/* -- Mobile (below 640px) -- */
@media (max-width: 640px) {
  .container { padding: 0 16px; }

  .navbar-links {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 14px 20px;
    gap: 14px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  }

  .navbar-links.open { display: flex; }

  .navbar-toggle { display: flex; }

  .navbar-toggle.active span:first-child {
    transform: rotate(45deg) translate(5px, 5px);
  }
  .navbar-toggle.active span:nth-child(2) { opacity: 0; }
  .navbar-toggle.active span:last-child {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .hero { padding: 100px 0 48px; }
  .hero-title { font-size: var(--font-2xl); }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn {
    justify-content: center;
    width: 100%;
  }

  .features, .showcase, .story, .download, .faq { padding: 64px 0; }

  .showcase-block { margin-bottom: 56px; }

  .download-box { padding: 28px 18px; }
  .download-content h2 { font-size: var(--font-2xl); }
  .download-btn {
    width: 100%;
    justify-content: center;
  }

  .footer-links { gap: 32px; }

  .feedback-page { padding: 100px 0 56px; }
  .feedback-form-wrapper { padding: 20px; }
  .feedback-intro h1 { font-size: var(--font-2xl); }
}