/* ============================================================
   RPMSG Viewer — Premium Design System
   Domain: justtoolkit.com/toolkit/rpmsg
   ============================================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* --- CSS Variables --- */
:root {
  --primary:         #3b82f6;
  --primary-dark:    #2563eb;
  --primary-glow:    rgba(59,130,246,0.25);
  --accent:          #22d3ee;
  --accent-glow:     rgba(34,211,238,0.2);
  --green:           #10b981;
  --red:             #ef4444;
  --yellow:          #f59e0b;

  --bg:              #020817;
  --bg-2:            #0b1120;
  --bg-card:         rgba(15,23,42,0.85);
  --bg-card-hover:   rgba(15,23,42,0.95);
  --bg-glass:        rgba(255,255,255,0.04);

  --text:            #f1f5f9;
  --text-muted:      #94a3b8;
  --text-faint:      #475569;

  --border:          rgba(255,255,255,0.07);
  --border-hover:    rgba(59,130,246,0.4);

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

  --shadow-card:     0 4px 32px rgba(0,0,0,0.4), 0 1px 0 rgba(255,255,255,0.05) inset;
  --shadow-glow:     0 0 40px rgba(59,130,246,0.15);
  --shadow-lg:       0 20px 60px rgba(0,0,0,0.5);

  --transition:      0.25s cubic-bezier(0.4,0,0.2,1);
  --font:            'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Shared nav/footer brand tokens (used by .nav__logo / .footer__logo) */
  --gradient:        linear-gradient(135deg, #3b82f6 0%, #06b6d4 50%, #8b5cf6 100%);
  --font-brand:      'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --text-primary:    #f1f5f9;
  --text-dim:        #64748b;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: var(--font); border: none; background: none; }
ul { list-style: none; }
input, textarea { font-family: var(--font); }

/* --- Background Pattern --- */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(59,130,246,0.12), transparent),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(34,211,238,0.06), transparent),
    linear-gradient(180deg, transparent 60%, rgba(59,130,246,0.03) 100%);
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    repeating-linear-gradient(0deg, transparent, transparent 79px, rgba(255,255,255,0.015) 80px),
    repeating-linear-gradient(90deg, transparent, transparent 79px, rgba(255,255,255,0.015) 80px);
  pointer-events: none;
  z-index: 0;
}

/* --- Layout --- */
.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}
.container--narrow { max-width: 820px; margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; position: relative; z-index: 1; }
.section--sm { padding: 64px 0; }

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.2; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.4rem, 5vw, 3.8rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.8rem); }
h4 { font-size: 1.2rem; font-weight: 600; }
p { color: var(--text-muted); }
.text-gradient {
  background: linear-gradient(135deg, #fff 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.text-blue {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-label {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.75rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 16px;
}
.section-label::before {
  content: '';
  display: block; width: 20px; height: 2px;
  background: var(--accent); border-radius: 2px;
}
.section-title { margin-bottom: 16px; }
.section-subtitle { font-size: 1.1rem; color: var(--text-muted); max-width: 540px; }
.text-center { text-align: center; }
.text-center .section-subtitle { margin: 0 auto; }
.text-center .section-label { justify-content: center; }
.text-center .section-label::before { display: none; }

/* ============================================================
   NAVIGATION
   ============================================================ */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 16px 0;
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  background: rgba(2,8,23,0.7);
  transition: background var(--transition);
}
.navbar.scrolled {
  background: rgba(2,8,23,0.92);
  border-bottom-color: rgba(255,255,255,0.1);
}
.navbar__inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px;
}
.navbar__logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.1rem; font-weight: 800; color: var(--text);
}
.navbar__logo-icon {
  width: 34px; height: 34px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; flex-shrink: 0;
}
.navbar__nav { display: flex; align-items: center; gap: 4px; }
.navbar__link {
  padding: 7px 14px; font-size: 0.9rem; font-weight: 500;
  color: var(--text-muted); border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}
.navbar__link:hover { color: var(--text); background: var(--bg-glass); }
.navbar__cta {
  padding: 8px 18px; font-size: 0.9rem; font-weight: 600;
  background: var(--primary); color: #fff; border-radius: var(--radius-sm);
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition);
}
.navbar__cta:hover {
  background: var(--primary-dark);
  box-shadow: 0 0 20px var(--primary-glow);
  transform: translateY(-1px);
}
.navbar__menu { display: none; }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  padding: 160px 0 96px;
  position: relative; z-index: 1;
  text-align: center;
}
.hero__badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 16px; margin-bottom: 28px;
  background: rgba(59,130,246,0.1); border: 1px solid rgba(59,130,246,0.25);
  border-radius: 100px; font-size: 0.8rem; font-weight: 500; color: var(--accent);
}
.hero__badge-dot {
  width: 6px; height: 6px; background: var(--green);
  border-radius: 50%; animation: pulse 2s infinite;
}
.hero__title {
  margin-bottom: 20px;
  max-width: 820px; margin-left: auto; margin-right: auto;
}
.hero__subtitle {
  font-size: 1.2rem; color: var(--text-muted);
  max-width: 560px; margin: 0 auto 48px;
}
.hero__privacy-note {
  display: inline-flex; align-items: center; gap: 8px;
  margin-top: 20px;
  font-size: 0.82rem; color: var(--text-faint); font-weight: 500;
}
.hero__privacy-note svg { color: var(--green); flex-shrink: 0; }

/* ============================================================
   UPLOAD ZONE (Main Tool)
   ============================================================ */
.tool-section {
  position: relative; z-index: 1;
  padding-bottom: 80px;
}
.upload-zone {
  position: relative;
  width: 100%; max-width: 680px; margin: 0 auto;
  border: 2px dashed rgba(59,130,246,0.3);
  border-radius: var(--radius-xl);
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  padding: 56px 40px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: var(--shadow-card);
}
.upload-zone::before {
  content: '';
  position: absolute; inset: -1px;
  border-radius: calc(var(--radius-xl) + 1px);
  background: linear-gradient(135deg, rgba(59,130,246,0.15), rgba(34,211,238,0.05));
  pointer-events: none; opacity: 0;
  transition: opacity var(--transition);
}
.upload-zone:hover, .upload-zone.drag-over {
  border-color: var(--primary);
  box-shadow: var(--shadow-glow), var(--shadow-card);
  transform: translateY(-2px);
}
.upload-zone:hover::before, .upload-zone.drag-over::before { opacity: 1; }
.upload-zone.drag-over { border-style: solid; background: rgba(59,130,246,0.07); }
.upload-zone.has-file { border-style: solid; border-color: var(--green); }
.upload-zone.has-file::before {
  background: linear-gradient(135deg, rgba(16,185,129,0.12), rgba(16,185,129,0.04));
  opacity: 1;
}
.upload-icon {
  width: 72px; height: 72px; margin: 0 auto 20px;
  background: linear-gradient(135deg, rgba(59,130,246,0.15), rgba(34,211,238,0.08));
  border-radius: 18px; display: flex; align-items: center; justify-content: center;
  border: 1px solid rgba(59,130,246,0.2);
  transition: transform var(--transition);
}
.upload-zone:hover .upload-icon { transform: scale(1.05) translateY(-2px); }
.upload-icon svg { width: 32px; height: 32px; color: var(--primary); }
.upload-title {
  font-size: 1.25rem; font-weight: 700; color: var(--text); margin-bottom: 8px;
}
.upload-subtitle { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 24px; }
.upload-or {
  display: flex; align-items: center; gap: 12px; margin: 20px 0;
  color: var(--text-faint); font-size: 0.85rem;
}
.upload-or::before, .upload-or::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}
.btn-upload {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; font-size: 0.95rem; font-weight: 600;
  border-radius: 999px;
  transition: all var(--transition);
  cursor: pointer;

  background: rgba(255,255,255,0.055);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border: 1px solid rgba(255,255,255,0.14);
  color: #f1f5f9;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.12),
    0 4px 18px rgba(0,0,0,0.22);
}
.btn-upload:hover {

  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.22);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.18),
    0 8px 24px rgba(0,0,0,0.28);
  transform: translateY(-1px);
}
.upload-hint { font-size: 0.78rem; color: var(--text-faint); margin-top: 16px; }
.upload-file-info {
  display: none; align-items: center; gap: 12px;
  background: rgba(16,185,129,0.08); border: 1px solid rgba(16,185,129,0.2);
  border-radius: var(--radius); padding: 14px 18px; margin-top: 20px;
  text-align: left;
}
.upload-file-info.show { display: flex; }
.upload-file-info__name { font-size: 0.9rem; font-weight: 600; color: var(--text); }
.upload-file-info__size { font-size: 0.78rem; color: var(--text-muted); }
.upload-file-info__icon { color: var(--green); flex-shrink: 0; }
.btn-analyze {
  display: none; width: 100%;
  padding: 15px; font-size: 1rem; font-weight: 700;
  border-radius: 999px;
  margin-top: 20px; letter-spacing: 0.02em;
  transition: all var(--transition);
  cursor: pointer;

  background: linear-gradient(135deg, rgba(56,189,248,0.16) 0%, rgba(99,102,241,0.22) 55%, rgba(167,139,250,0.18) 100%);
  backdrop-filter: blur(18px) saturate(165%);
  -webkit-backdrop-filter: blur(18px) saturate(165%);
  border: 1px solid rgba(186,230,253,0.32);
  color: #f0f9ff;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.22),
    0 8px 28px rgba(56,189,248,0.12),
    0 1px 2px rgba(0,0,0,0.25);
  text-shadow: 0 1px 2px rgba(0,0,0,0.2);
}
.btn-analyze.show { display: block; }
.btn-analyze:hover {

  background: linear-gradient(135deg, rgba(56,189,248,0.28) 0%, rgba(99,102,241,0.34) 55%, rgba(167,139,250,0.28) 100%);
  border-color: rgba(224,242,254,0.5);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.3),
    0 14px 40px rgba(56,189,248,0.22);
  transform: translateY(-1px);
}
.btn-analyze:active { transform: translateY(0); }

/* File input hidden */
#fileInput { display: none; }

/* ============================================================
   PARSING ANIMATION
   ============================================================ */
.parsing-overlay {
  display: none; position: absolute; inset: 0;
  border-radius: var(--radius-xl);
  background: var(--bg-card); backdrop-filter: blur(20px);
  flex-direction: column; align-items: center; justify-content: center; gap: 16px;
  z-index: 10;
}
.parsing-overlay.show { display: flex; }
.parsing-spinner {
  width: 48px; height: 48px;
  border: 3px solid rgba(59,130,246,0.2);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
.parsing-text { font-size: 0.95rem; font-weight: 600; color: var(--text-muted); }
.parsing-steps { display: flex; flex-direction: column; gap: 6px; width: 200px; }
.parsing-step {
  font-size: 0.78rem; color: var(--text-faint);
  display: flex; align-items: center; gap: 8px;
  transition: color var(--transition);
}
.parsing-step.active { color: var(--accent); }
.parsing-step.done { color: var(--green); }
.parsing-step__dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: currentColor; flex-shrink: 0;
}

/* ============================================================
   RESULTS PANEL
   ============================================================ */
.results-panel {
  display: none; max-width: 860px; margin: 32px auto 0;
  background: var(--bg-card); backdrop-filter: blur(20px);
  border: 1px solid var(--border); border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  animation: slideUp 0.4s ease forwards;
  overflow: hidden;
}
.results-panel.show { display: block; }

.results-header {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  padding: 24px 28px 20px;
  border-bottom: 1px solid var(--border);
}
.results-title { font-size: 1rem; font-weight: 700; color: var(--text); }
.results-status {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 12px; border-radius: 100px; font-size: 0.78rem; font-weight: 600;
}
.results-status--valid { background: rgba(16,185,129,0.12); color: var(--green); border: 1px solid rgba(16,185,129,0.25); }
.results-status--invalid { background: rgba(239,68,68,0.12); color: var(--red); border: 1px solid rgba(239,68,68,0.25); }

.results-tabs {
  display: flex; gap: 4px; padding: 16px 24px 0;
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}
.results-tab {
  padding: 9px 18px; font-size: 0.85rem; font-weight: 600;
  color: var(--text-muted); border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  border: 1px solid transparent; border-bottom: none;
  transition: all var(--transition); white-space: nowrap;
  position: relative; bottom: -1px;
}
.results-tab:hover { color: var(--text); background: var(--bg-glass); }
.results-tab.active {
  color: var(--primary); background: var(--bg-card);
  border-color: var(--border); border-bottom-color: var(--bg-card);
}

.results-content { padding: 24px 28px 28px; }
.tab-pane { display: none; animation: fadeIn 0.25s ease; }
.tab-pane.active { display: block; }

/* Info grid */
.info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.info-card {
  background: var(--bg-glass); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px;
}
.info-card__label {
  font-size: 0.72rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-faint); margin-bottom: 6px;
}
.info-card__value { font-size: 0.95rem; font-weight: 600; color: var(--text); word-break: break-all; }
.info-card__value--accent { color: var(--accent); }
.info-card--full { grid-column: 1 / -1; }
.info-card--warn { border-color: rgba(245,158,11,0.25); background: rgba(245,158,11,0.05); }
.info-card--success { border-color: rgba(16,185,129,0.25); background: rgba(16,185,129,0.05); }

/* Stream tree */
.stream-tree { font-size: 0.85rem; }
.stream-entry {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 10px 14px; border-radius: var(--radius-sm);
  border-bottom: 1px solid var(--border); transition: background var(--transition);
}
.stream-entry:last-child { border-bottom: none; }
.stream-entry:hover { background: var(--bg-glass); }
.stream-entry__icon { font-size: 14px; flex-shrink: 0; padding-top: 1px; }
.stream-entry__info { flex: 1; min-width: 0; }
.stream-entry__name { font-weight: 600; color: var(--text); word-break: break-all; }
.stream-entry__meta { font-size: 0.75rem; color: var(--text-muted); margin-top: 2px; }
.stream-entry__size {
  font-size: 0.75rem; font-weight: 600; color: var(--text-faint);
  white-space: nowrap; flex-shrink: 0;
}

/* Hex viewer */
.hex-block {
  background: #000d1a; border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 14px;
  font-family: 'Courier New', monospace; font-size: 0.78rem;
  color: var(--accent); overflow-x: auto; max-height: 180px;
  overflow-y: auto;
  white-space: pre;
}

/* Next steps */
.steps-list { display: flex; flex-direction: column; gap: 16px; }
.step-item {
  display: flex; gap: 16px;
  padding: 18px; border-radius: var(--radius);
  background: var(--bg-glass); border: 1px solid var(--border);
  transition: border-color var(--transition);
}
.step-item:hover { border-color: rgba(59,130,246,0.3); }
.step-num {
  width: 32px; height: 32px; flex-shrink: 0;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 0.8rem; font-weight: 800; color: #fff;
}
.step-item__title { font-size: 0.95rem; font-weight: 700; color: var(--text); margin-bottom: 4px; }
.step-item__desc { font-size: 0.85rem; color: var(--text-muted); }
.step-item__link {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 10px; padding: 8px 16px; font-size: 0.82rem; font-weight: 600;
  background: var(--primary); color: #fff; border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.step-item__link:hover { background: var(--primary-dark); box-shadow: 0 4px 16px var(--primary-glow); }

/* Error state */
.error-state {
  display: none; max-width: 680px; margin: 24px auto 0;
  background: rgba(239,68,68,0.08); border: 1px solid rgba(239,68,68,0.25);
  border-radius: var(--radius-xl); padding: 28px;
  text-align: center; animation: slideUp 0.3s ease;
}
.error-state.show { display: block; }
.error-state__title { font-size: 1.1rem; font-weight: 700; color: var(--red); margin-bottom: 8px; }
.error-state__msg { font-size: 0.9rem; color: var(--text-muted); }

/* ============================================================
   HOW IT WORKS
   ============================================================ */
.how-it-works { background: var(--bg-2); }
.steps-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; margin-top: 56px; }
.step-card {
  text-align: center; padding: 36px 28px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  position: relative; overflow: hidden;
}
.step-card::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, var(--primary-glow), transparent);
  opacity: 0; transition: opacity var(--transition);
}
.step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-glow); border-color: rgba(59,130,246,0.3); }
.step-card:hover::after { opacity: 1; }
.step-card__number {
  font-size: 3.5rem; font-weight: 900; line-height: 1;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  margin-bottom: 16px; position: relative; z-index: 1;
}
.step-card__icon {
  width: 56px; height: 56px; margin: 0 auto 20px;
  background: rgba(59,130,246,0.1); border: 1px solid rgba(59,130,246,0.2);
  border-radius: var(--radius); display: flex; align-items: center; justify-content: center;
  position: relative; z-index: 1;
}
.step-card__icon svg { width: 24px; height: 24px; color: var(--primary); }
.step-card__title { font-size: 1.05rem; font-weight: 700; color: var(--text); margin-bottom: 10px; position: relative; z-index: 1; }
.step-card__desc { font-size: 0.88rem; color: var(--text-muted); position: relative; z-index: 1; }

/* ============================================================
   FEATURES
   ============================================================ */
.features-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; margin-top: 56px; }
.feature-card {
  padding: 28px 24px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); backdrop-filter: blur(10px);
  transition: all var(--transition); position: relative; overflow: hidden;
}
.feature-card:hover { border-color: var(--border-hover); transform: translateY(-3px); box-shadow: var(--shadow-glow); }
.feature-card__icon {
  width: 48px; height: 48px; margin-bottom: 18px;
  background: linear-gradient(135deg, rgba(59,130,246,0.15), rgba(34,211,238,0.08));
  border: 1px solid rgba(59,130,246,0.2);
  border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center;
}
.feature-card__icon svg { width: 22px; height: 22px; color: var(--primary); }
.feature-card__title { font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.feature-card__desc { font-size: 0.875rem; color: var(--text-muted); }

/* ============================================================
   FAQ
   ============================================================ */
.faq-section { background: var(--bg-2); }
.faq-list { margin-top: 48px; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  transition: border-color var(--transition);
}
.faq-item:hover { border-color: rgba(59,130,246,0.25); }
.faq-item.open { border-color: rgba(59,130,246,0.35); }
.faq-question {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 20px 24px; cursor: pointer; font-size: 0.95rem; font-weight: 600;
  color: var(--text); transition: color var(--transition);
  width: 100%; text-align: left;
}
.faq-question:hover { color: var(--accent); }
.faq-icon {
  width: 26px; height: 26px; flex-shrink: 0;
  background: var(--bg-glass); border: 1px solid var(--border);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.faq-item.open .faq-icon { background: var(--primary); border-color: var(--primary); transform: rotate(45deg); }
.faq-icon svg { width: 12px; height: 12px; color: var(--text-muted); transition: color var(--transition); }
.faq-item.open .faq-icon svg { color: #fff; }
.faq-answer {
  max-height: 0; overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.4,0,0.2,1), padding var(--transition);
}
.faq-item.open .faq-answer { max-height: 400px; }
.faq-answer__inner {
  padding: 0 24px 20px;
  font-size: 0.9rem; color: var(--text-muted); line-height: 1.7;
}
.faq-answer__inner a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }

/* ============================================================
   BLOG SECTION
   ============================================================ */
.blog-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; margin-top: 48px; }
.blog-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); overflow: hidden;
  transition: all var(--transition); display: flex; flex-direction: column;
}
.blog-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-glow); border-color: rgba(59,130,246,0.3); }
.blog-card__thumb {
  height: 160px; overflow: hidden;
  background: linear-gradient(135deg, rgba(59,130,246,0.12), rgba(34,211,238,0.06));
  display: flex; align-items: center; justify-content: center;
  position: relative;
}
.blog-card__thumb-icon { font-size: 3rem; opacity: 0.4; }
.blog-card__content { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.blog-card__category {
  display: inline-block; padding: 3px 10px; margin-bottom: 12px;
  background: rgba(59,130,246,0.1); border: 1px solid rgba(59,130,246,0.2);
  border-radius: 100px; font-size: 0.72rem; font-weight: 600; color: var(--primary);
  text-transform: uppercase; letter-spacing: 0.06em;
}
.blog-card__title {
  font-size: 1rem; font-weight: 700; color: var(--text);
  margin-bottom: 10px; line-height: 1.4;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.blog-card__excerpt {
  font-size: 0.85rem; color: var(--text-muted); line-height: 1.6; flex: 1;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.blog-card__footer {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--border);
}
.blog-card__date { font-size: 0.78rem; color: var(--text-faint); }
.blog-card__read {
  font-size: 0.78rem; font-weight: 600; color: var(--primary);
  display: flex; align-items: center; gap: 4px;
  transition: gap var(--transition);
}
.blog-card:hover .blog-card__read { gap: 8px; }

/* ============================================================
   SECURITY ALERT BANNER
   ============================================================ */
.security-banner {
  background: rgba(245,158,11,0.06); border: 1px solid rgba(245,158,11,0.2);
  border-radius: var(--radius-lg); padding: 24px 28px;
  display: flex; gap: 16px; align-items: flex-start; margin: 48px 0;
}
.security-banner__icon { font-size: 24px; flex-shrink: 0; margin-top: 2px; }
.security-banner__title { font-size: 1rem; font-weight: 700; color: var(--yellow); margin-bottom: 6px; }
.security-banner__text { font-size: 0.88rem; color: var(--text-muted); }

/* ============================================================
   CTA SECTION
   ============================================================ */
.cta-section {
  text-align: center; padding: 96px 0;
  background: linear-gradient(180deg, transparent 0%, rgba(59,130,246,0.04) 50%, transparent 100%);
}
.cta-title { margin-bottom: 16px; }
.cta-subtitle { font-size: 1.1rem; color: var(--text-muted); max-width: 480px; margin: 0 auto 36px; }
.btn-group { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; font-size: 1rem; font-weight: 700;
  border-radius: 999px;
  transition: all var(--transition);
  text-decoration: none; cursor: pointer;

  background: linear-gradient(135deg, rgba(56,189,248,0.16) 0%, rgba(99,102,241,0.22) 55%, rgba(167,139,250,0.18) 100%);
  backdrop-filter: blur(18px) saturate(165%);
  -webkit-backdrop-filter: blur(18px) saturate(165%);
  border: 1px solid rgba(186,230,253,0.32);
  color: #f0f9ff;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.22),
    0 8px 28px rgba(56,189,248,0.12),
    0 1px 2px rgba(0,0,0,0.25);
  text-shadow: 0 1px 2px rgba(0,0,0,0.2);
}
.btn-primary:hover {
  background: linear-gradient(135deg, rgba(56,189,248,0.28) 0%, rgba(99,102,241,0.34) 55%, rgba(167,139,250,0.28) 100%);
  border-color: rgba(224,242,254,0.5);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.3),
    0 14px 40px rgba(56,189,248,0.22);
  transform: translateY(-1px);
}
.btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; font-size: 1rem; font-weight: 600;
  border-radius: 999px;
  transition: all var(--transition);
  text-decoration: none; cursor: pointer;

  background: rgba(255,255,255,0.055);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border: 1px solid rgba(255,255,255,0.14);
  color: #f1f5f9;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.12),
    0 4px 18px rgba(0,0,0,0.22);
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.22);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.18),
    0 8px 24px rgba(0,0,0,0.28);
  transform: translateY(-1px);
}

/* ============================================================
   STATS BAR
   ============================================================ */
.stats-bar {
  display: grid; grid-template-columns: repeat(4,1fr);
  gap: 1px; background: var(--border);
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  overflow: hidden; margin-top: 56px;
}
.stat-item {
  background: var(--bg-card); padding: 28px 20px;
  text-align: center;
  transition: background var(--transition);
}
.stat-item:hover { background: var(--bg-card-hover); }
.stat-item__value {
  font-size: 2rem; font-weight: 900; line-height: 1;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  margin-bottom: 6px;
}
.stat-item__label { font-size: 0.82rem; color: var(--text-muted); font-weight: 500; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--bg-2); border-top: 1px solid var(--border);
  padding: 64px 0 32px; position: relative; z-index: 1;
}
.footer__grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer__brand { max-width: 280px; }
.footer__logo { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; font-size: 1.05rem; font-weight: 800; }
.footer__logo-icon {
  width: 30px; height: 30px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 7px; display: flex; align-items: center; justify-content: center; font-size: 14px;
}
.footer__tagline { font-size: 0.88rem; color: var(--text-muted); line-height: 1.6; }
.footer__col-title { font-size: 0.8rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-faint); margin-bottom: 16px; }
.footer__links { display: flex; flex-direction: column; gap: 10px; }
.footer__link { font-size: 0.88rem; color: var(--text-muted); transition: color var(--transition); }
.footer__link:hover { color: var(--text); }
.footer__bottom {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  padding-top: 28px; border-top: 1px solid var(--border);
  font-size: 0.82rem; color: var(--text-faint);
}

/* ============================================================
   BLOG PAGE STYLES
   ============================================================ */
.blog-hero { padding: 120px 0 64px; text-align: center; }
.blog-hero__title { margin-bottom: 16px; }
.blog-hero__subtitle { font-size: 1.05rem; color: var(--text-muted); max-width: 520px; margin: 0 auto; }
.blog-listing { padding: 64px 0 96px; }
.blog-listing__grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; }
.blog-card--large { grid-column: 1 / -1; flex-direction: row; }
.blog-card--large .blog-card__thumb { width: 320px; flex-shrink: 0; height: auto; min-height: 220px; }
.blog-card--large .blog-card__content { padding: 28px; }
.blog-card--large .blog-card__title { font-size: 1.3rem; -webkit-line-clamp: 3; }

/* ============================================================
   ARTICLE PAGE STYLES
   ============================================================ */
.article-hero { padding: 120px 0 48px; }
.article-hero__category {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 14px; margin-bottom: 20px;
  background: rgba(59,130,246,0.1); border: 1px solid rgba(59,130,246,0.25);
  border-radius: 100px; font-size: 0.78rem; font-weight: 600; color: var(--accent);
  text-transform: uppercase; letter-spacing: 0.08em;
}
.article-hero__title { margin-bottom: 20px; }
.article-meta {
  display: flex; align-items: center; gap: 20px; flex-wrap: wrap;
  font-size: 0.85rem; color: var(--text-muted); margin-bottom: 24px;
}
.article-meta__item { display: flex; align-items: center; gap: 6px; }
.article-excerpt { font-size: 1.1rem; color: var(--text-muted); line-height: 1.7; border-left: 3px solid var(--primary); padding-left: 18px; }
.article-body { padding: 48px 0 96px; }
.article-content { max-width: 760px; }
.article-content h2 { font-size: 1.8rem; color: var(--text); margin: 48px 0 16px; }
.article-content h3 { font-size: 1.3rem; color: var(--text); margin: 32px 0 12px; }
.article-content p { font-size: 0.97rem; color: var(--text-muted); margin-bottom: 18px; line-height: 1.8; }
.article-content ul, .article-content ol { padding-left: 24px; margin-bottom: 18px; }
.article-content li { font-size: 0.97rem; color: var(--text-muted); margin-bottom: 8px; line-height: 1.7; }
.article-content ul li { list-style: disc; }
.article-content ol li { list-style: decimal; }
.article-content a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.article-content strong { color: var(--text); font-weight: 600; }
.article-content .callout {
  background: rgba(59,130,246,0.07); border: 1px solid rgba(59,130,246,0.2);
  border-left: 4px solid var(--primary); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 18px 20px; margin: 24px 0; font-size: 0.92rem; color: var(--text-muted);
}
.article-content .callout--warn {
  background: rgba(245,158,11,0.07); border-color: rgba(245,158,11,0.2); border-left-color: var(--yellow);
}
.article-content .callout--danger {
  background: rgba(239,68,68,0.07); border-color: rgba(239,68,68,0.2); border-left-color: var(--red);
}
.article-content .callout strong { color: inherit; }
.article-sidebar { position: sticky; top: 100px; }
.sidebar-cta {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px; margin-bottom: 24px;
}
.sidebar-cta__title { font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: 10px; }
.sidebar-cta__text { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 18px; }
.sidebar-cta__btn {
  display: block; text-align: center; width: 100%;
  padding: 11px; font-size: 0.9rem; font-weight: 700;
  background: var(--primary); color: #fff; border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.sidebar-cta__btn:hover { background: var(--primary-dark); box-shadow: 0 4px 16px var(--primary-glow); }
.toc {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 24px;
}
.toc__title { font-size: 0.85rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-faint); margin-bottom: 14px; }
.toc__list { display: flex; flex-direction: column; gap: 8px; }
.toc__link { font-size: 0.85rem; color: var(--text-muted); transition: color var(--transition); padding-left: 8px; border-left: 2px solid transparent; transition: all var(--transition); }
.toc__link:hover { color: var(--accent); border-left-color: var(--accent); }
.article-layout { display: grid; grid-template-columns: 1fr 300px; gap: 48px; align-items: start; }

/* Comparison table */
.comp-table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 0.88rem; }
.comp-table th {
  background: rgba(59,130,246,0.1); color: var(--text); font-weight: 700;
  padding: 12px 16px; text-align: left; border-bottom: 1px solid rgba(59,130,246,0.2);
}
.comp-table td { padding: 12px 16px; color: var(--text-muted); border-bottom: 1px solid var(--border); }
.comp-table tr:last-child td { border-bottom: none; }
.comp-table tr:hover td { background: var(--bg-glass); }
.comp-table .highlight { color: var(--accent); font-weight: 600; }

/* ============================================================
   UTILITY / BADGE
   ============================================================ */
.badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 10px; border-radius: 100px; font-size: 0.72rem; font-weight: 700;
  letter-spacing: 0.04em;
}
.badge--blue { background: rgba(59,130,246,0.12); color: var(--primary); border: 1px solid rgba(59,130,246,0.2); }
.badge--green { background: rgba(16,185,129,0.12); color: var(--green); border: 1px solid rgba(16,185,129,0.2); }
.badge--red { background: rgba(239,68,68,0.12); color: var(--red); border: 1px solid rgba(239,68,68,0.2); }
.badge--yellow { background: rgba(245,158,11,0.12); color: var(--yellow); border: 1px solid rgba(245,158,11,0.2); }
.divider { height: 1px; background: var(--border); margin: 0; }

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}
.animate-on-scroll {
  opacity: 0; transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.animate-on-scroll.visible { opacity: 1; transform: translateY(0); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { position: static; }
  .blog-listing__grid { grid-template-columns: 1fr; }
  .blog-card--large { flex-direction: column; }
  .blog-card--large .blog-card__thumb { width: 100%; height: 200px; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .container,
  .container--narrow { padding: 0 16px; }

  /* Legacy navbar (if present) */
  .navbar__nav { display: none; }
  .navbar__menu {
    display: flex; align-items: center; gap: 8px;
    padding: 7px 14px; font-size: 0.85rem; font-weight: 600;
    color: var(--text-muted); border: 1px solid var(--border); border-radius: var(--radius-sm);
  }

  /* Hero / sections */
  .hero { padding: 88px 0 40px; }
  .hero__title { font-size: clamp(1.75rem, 7.5vw, 2.4rem); }
  .hero__subtitle { font-size: 1rem; margin-bottom: 28px; line-height: 1.65; }
  .hero__badge { font-size: 0.72rem; padding: 5px 12px; max-width: 100%; text-align: left; white-space: normal; line-height: 1.4; }
  .hero__privacy-note { font-size: 0.78rem; justify-content: center; text-align: center; flex-wrap: wrap; padding: 0 8px; }

  .section { padding: 56px 0; }
  .section--sm { padding: 40px 0; }
  .section-subtitle { font-size: 1rem; }
  .tool-section { padding-bottom: 48px; }

  /* Upload / tool */
  .upload-zone { padding: 32px 18px; border-radius: var(--radius-lg); }
  .upload-icon { width: 60px; height: 60px; margin-bottom: 16px; }
  .upload-title { font-size: 1.1rem; }
  .upload-subtitle { font-size: 0.86rem; }
  .btn-upload { width: 100%; max-width: 280px; justify-content: center; min-height: 48px; }
  .btn-analyze { min-height: 48px; font-size: 0.95rem; }
  .upload-file-info { flex-wrap: wrap; }

  /* Results */
  .results-panel { margin-top: 20px; border-radius: var(--radius-lg); }
  .results-header { padding: 18px 16px 14px; gap: 10px; }
  .results-title { font-size: 0.92rem; word-break: break-word; }
  .results-tabs {
    padding: 12px 12px 0;
    gap: 2px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .results-tabs::-webkit-scrollbar { display: none; }
  .results-tab { padding: 10px 12px; font-size: 0.8rem; min-height: 44px; }
  .results-content { padding: 16px; }
  .info-grid { grid-template-columns: 1fr; gap: 10px; }
  .info-card { padding: 14px; }
  .info-card__value { font-size: 0.9rem; }

  /* Attachments / streams */
  .attach-row {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
  .btn-download {
  flex-shrink: 0; padding: 8px 14px; border-radius: 999px; border: none; cursor: pointer;
  font-weight: 600; font-size: 0.82rem;

  background: linear-gradient(135deg, rgba(56,189,248,0.16) 0%, rgba(99,102,241,0.22) 55%, rgba(167,139,250,0.18) 100%);
  backdrop-filter: blur(18px) saturate(165%);
  -webkit-backdrop-filter: blur(18px) saturate(165%);
  border: 1px solid rgba(186,230,253,0.32);
  color: #f0f9ff;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.22),
    0 8px 28px rgba(56,189,248,0.12),
    0 1px 2px rgba(0,0,0,0.25);
  text-shadow: 0 1px 2px rgba(0,0,0,0.2);
}
.btn-download:hover {
  background: linear-gradient(135deg, rgba(56,189,248,0.28) 0%, rgba(99,102,241,0.34) 55%, rgba(167,139,250,0.28) 100%);
  border-color: rgba(224,242,254,0.5);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.3),
    0 14px 40px rgba(56,189,248,0.22);
  transform: translateY(-1px);
}
.body-pre {
  white-space: pre-wrap; word-break: break-word; font-size: 0.85rem; line-height: 1.55;
  padding: 16px; border-radius: 12px; background: rgba(0,0,0,0.35);
  border: 1px solid rgba(255,255,255,0.06); color: var(--text-muted); max-height: 420px; overflow: auto;
}
.stream-list { display: flex; flex-direction: column; gap: 6px; }
.stream-item {
  display: flex; justify-content: space-between; gap: 12px; padding: 10px 12px;
  border-radius: 8px; background: rgba(255,255,255,0.03); font-size: 0.85rem;
}
.stream-item__name { color: var(--text); font-weight: 500; }
.stream-item__size { color: var(--text-muted); white-space: nowrap; }

/* MSG body HTML preview */
.msg-body-html {
  padding: 16px 18px;
  border-radius: 12px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.65;
  max-height: 480px;
  overflow: auto;
  word-break: break-word;
}
.msg-body-html img { max-width: 100%; height: auto; }
.msg-body-html a { color: var(--accent); }