/* ===================================================
   DirectDrop — style.css
   Dark, glassmorphism, purple/blue gradient theme
   =================================================== */

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

:root {
  --bg: #07070e;
  --bg2: #0d0d1a;
  --bg3: #111120;
  --surface: rgba(255,255,255,0.045);
  --surface-hover: rgba(255,255,255,0.09);
  --border: rgba(255,255,255,0.09);
  --border-hover: rgba(255,255,255,0.18);
  --text: #f0f0f8;
  --text-muted: #8888a6;
  --text-dim: #50506a;
  --primary: #6366f1;
  --primary-light: #818cf8;
  --secondary: #8b5cf6;
  --accent: #06b6d4;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --grad: linear-gradient(135deg, #6366f1, #8b5cf6);
  --grad-wide: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #06b6d4 100%);
  --shadow: 0 8px 32px rgba(0,0,0,0.5);
  --shadow-lg: 0 24px 80px rgba(0,0,0,0.7);
  --radius: 14px;
  --radius-lg: 22px;
  --radius-xl: 30px;
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

/* ---- Utilities ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.desktop-only { display: inline; }
.gradient-text {
  background: var(--grad-wide);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  font-family: inherit;
  line-height: 1;
}
.btn svg { width: 16px; height: 16px; flex-shrink: 0; }
.btn-primary {
  background: var(--grad);
  color: white;
  box-shadow: 0 4px 20px rgba(99,102,241,0.35);
  position: relative;
  overflow: hidden;
}
.btn-primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}
.btn-primary:hover::after { opacity: 1; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 36px rgba(99,102,241,0.55); }
.btn-primary:active { transform: translateY(0); }
.btn-outline {
  background: rgba(255,255,255,0.04);
  color: var(--text);
  border: 1.5px solid var(--border-hover);
  backdrop-filter: blur(8px);
}
.btn-outline:hover { background: rgba(99,102,241,0.1); border-color: var(--primary-light); color: var(--primary-light); transform: translateY(-2px); box-shadow: 0 4px 20px rgba(99,102,241,0.15); }
.btn-outline:active { transform: translateY(0); }
.btn-ghost { background: transparent; color: var(--text-muted); }
.btn-ghost:hover { color: var(--text); background: var(--surface); }
.btn-large { padding: 14px 30px; font-size: 1rem; border-radius: 14px; gap: 10px; }
.btn-danger { background: rgba(239,68,68,0.12); color: var(--danger); border: 1.5px solid rgba(239,68,68,0.25); }
.btn-danger:hover { background: rgba(239,68,68,0.22); transform: translateY(-1px); }
.btn-success { background: rgba(16,185,129,0.12); color: var(--success); border: 1.5px solid rgba(16,185,129,0.25); }
.btn-success:hover { background: rgba(16,185,129,0.22); transform: translateY(-1px); }
.btn-sm { padding: 7px 14px; font-size: 0.8rem; border-radius: 9px; }
.btn-sm svg { width: 14px; height: 14px; }
.btn-icon { padding: 8px; border-radius: 10px; }
.btn-icon svg { width: 18px; height: 18px; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none !important; box-shadow: none !important; }

/* ---- Header ---- */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 16px 0;
  transition: all var(--transition);
}
.header.scrolled {
  background: rgba(9,9,15,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}
.nav { display: flex; align-items: center; gap: 32px; }
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text);
  flex-shrink: 0;
}
.logo-icon { width: 32px; height: 32px; }
.nav-links {
  display: flex;
  gap: 4px;
  flex: 1;
}
.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 8px;
  transition: all var(--transition);
}
.nav-links a:hover { color: var(--text); background: var(--surface); }
.nav-actions { display: flex; gap: 8px; align-items: center; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--text-muted); border-radius: 2px; transition: all var(--transition); }
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---- Hero ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 120px 0 80px;
  overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.hero-grid {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(99,102,241,0.08) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(99,102,241,0.08) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 0%, transparent 100%);
}
.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.3;
}
.orb1 { width: 600px; height: 600px; background: radial-gradient(circle, #6366f1, transparent); top: -200px; left: -100px; }
.orb2 { width: 500px; height: 500px; background: radial-gradient(circle, #8b5cf6, transparent); top: -100px; right: -100px; }
.orb3 { width: 400px; height: 400px; background: radial-gradient(circle, #06b6d4, transparent); bottom: -100px; left: 30%; }
.hero-content { position: relative; text-align: center; max-width: 780px; margin: 0 auto; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(99,102,241,0.1);
  border: 1px solid rgba(99,102,241,0.22);
  border-radius: 100px;
  padding: 7px 18px;
  font-size: 0.8rem;
  color: var(--primary-light);
  margin-bottom: 28px;
  font-weight: 500;
  backdrop-filter: blur(12px);
  animation: fadeInDown 0.6s var(--ease-out) both;
}
@keyframes fadeInDown { from{opacity:0;transform:translateY(-12px)} to{opacity:1;transform:none} }
.badge-dot { width: 7px; height: 7px; background: var(--success); border-radius: 50%; box-shadow: 0 0 8px var(--success); animation: pulse 2.5s infinite; }
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:0.5;transform:scale(1.5)} }
.hero-title { font-size: clamp(2.8rem, 6vw, 5rem); font-weight: 900; line-height: 1.1; margin-bottom: 24px; letter-spacing: -2px; }
.hero-subtitle { font-size: clamp(1rem, 2vw, 1.2rem); color: var(--text-muted); margin-bottom: 40px; max-width: 560px; margin-left: auto; margin-right: auto; }
.hero-buttons { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 14px 28px;
  backdrop-filter: blur(12px);
  display: inline-flex;
}
.stat { text-align: center; }
.stat strong { display: block; font-size: 1.05rem; font-weight: 800; background: var(--grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.stat span { font-size: 0.75rem; color: var(--text-muted); }
.stat-divider { width: 1px; height: 30px; background: var(--border); }

/* Hero visual demo */
.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 60px;
  padding: 0 24px;
  flex-wrap: wrap;
}
.transfer-card-demo {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  min-width: 200px;
  animation: floatCard 4s ease-in-out infinite;
}
.card-right { animation-delay: -2s; }
.demo-avatar { width: 36px; height: 36px; border-radius: 50%; display: flex; align-items: center; justify-content: center; color: white; font-weight: 800; font-size: 0.9rem; flex-shrink: 0; }
.demo-info { flex: 1; min-width: 0; }
.demo-label { font-size: 0.7rem; color: var(--text-muted); display: block; }
.demo-file { font-size: 0.85rem; font-weight: 600; display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.demo-progress { height: 4px; background: var(--border); border-radius: 2px; margin: 6px 0; overflow: hidden; }
.demo-bar { height: 100%; background: var(--grad); border-radius: 2px; transition: width 0.05s linear; }
.demo-speed { font-size: 0.7rem; color: var(--text-muted); }
.transfer-arrow { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.transfer-arrow svg { width: 80px; }
.p2p-badge { font-size: 0.7rem; color: var(--primary-light); background: rgba(99,102,241,0.12); border: 1px solid rgba(99,102,241,0.2); padding: 3px 8px; border-radius: 100px; white-space: nowrap; }
@keyframes floatCard { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-6px)} }

/* ---- Section Shared ---- */
.section-header { text-align: center; margin-bottom: 56px; }
.section-tag { font-size: 0.8rem; font-weight: 700; text-transform: uppercase; letter-spacing: 2px; color: var(--primary-light); background: rgba(99,102,241,0.1); border: 1px solid rgba(99,102,241,0.2); padding: 4px 14px; border-radius: 100px; display: inline-block; margin-bottom: 16px; }
.section-header h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); font-weight: 800; margin-bottom: 12px; letter-spacing: -1px; }
.section-header p { color: var(--text-muted); font-size: 1.05rem; }

/* ---- Features ---- */
.features-section { padding: 100px 0; background: var(--bg2); }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 20px; }
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
  opacity: 0;
  transform: translateY(20px);
}
.feature-card.in-view { opacity: 1; transform: none; }
.feature-card:hover { background: var(--surface-hover); border-color: var(--border-hover); transform: translateY(-4px); box-shadow: var(--shadow); }
.feature-icon {
  width: 48px; height: 48px;
  background: rgba(from var(--color) r g b / 0.12);
  border: 1px solid rgba(from var(--color) r g b / 0.25);
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
  color: var(--color);
}
.feature-icon { background: color-mix(in srgb, var(--color) 12%, transparent); border: 1px solid color-mix(in srgb, var(--color) 25%, transparent); }
.feature-icon svg { width: 22px; height: 22px; }
.feature-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
.feature-card p { color: var(--text-muted); font-size: 0.9rem; line-height: 1.6; }

/* ---- How It Works ---- */
.how-section { padding: 100px 0; }
.steps-row { display: flex; align-items: center; justify-content: center; gap: 0; flex-wrap: wrap; }
.step-card {
  flex: 1; min-width: 220px; max-width: 280px;
  text-align: center;
  padding: 32px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  opacity: 0;
  transform: translateY(20px);
  position: relative;
}
.step-card.in-view { opacity: 1; transform: none; }
.step-card:hover { background: var(--surface-hover); border-color: var(--border-hover); transform: translateY(-4px); }
.step-number {
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  background: var(--grad);
  font-size: 0.75rem; font-weight: 800; letter-spacing: 1px;
  color: white;
  padding: 4px 12px; border-radius: 100px;
}
.step-icon {
  width: 56px; height: 56px;
  background: rgba(99,102,241,0.1);
  border: 1px solid rgba(99,102,241,0.2);
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  margin: 12px auto 16px;
  color: var(--primary-light);
}
.step-icon svg { width: 24px; height: 24px; }
.step-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.step-card p { color: var(--text-muted); font-size: 0.875rem; line-height: 1.6; }
.step-connector { flex-shrink: 0; padding: 0 8px; }
.step-connector svg { width: 48px; display: block; }

/* ---- Security ---- */
.security-section { padding: 100px 0; background: var(--bg2); }
.security-card {
  display: flex;
  gap: 40px;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 48px;
  transition: all var(--transition);
  opacity: 0;
  transform: translateY(20px);
}
.security-card.in-view { opacity: 1; transform: none; }
.security-icon svg { width: 80px; height: 80px; flex-shrink: 0; }
.security-text { flex: 1; }
.security-text h2 { font-size: clamp(1.4rem, 2.5vw, 2rem); font-weight: 800; margin-bottom: 16px; letter-spacing: -0.5px; }
.security-text p { color: var(--text-muted); line-height: 1.7; margin-bottom: 24px; }
.security-badges { display: flex; gap: 10px; flex-wrap: wrap; }
.sec-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(16,185,129,0.08);
  border: 1px solid rgba(16,185,129,0.2);
  color: var(--success);
  font-size: 0.8rem; font-weight: 600;
  padding: 6px 12px; border-radius: 8px;
}
.sec-badge svg { width: 14px; height: 14px; }

/* ---- CTA ---- */
.cta-section { padding: 100px 0; }
.cta-inner { text-align: center; }
.cta-inner h2 { font-size: clamp(1.8rem, 3vw, 2.5rem); font-weight: 800; margin-bottom: 12px; letter-spacing: -1px; }
.cta-inner p { color: var(--text-muted); margin-bottom: 36px; font-size: 1.05rem; }

/* ---- Footer ---- */
.footer { background: var(--bg2); border-top: 1px solid var(--border); padding: 60px 0 0; }
.footer-inner { display: flex; gap: 48px; justify-content: space-between; flex-wrap: wrap; margin-bottom: 48px; }
.footer-brand { flex: 1; min-width: 220px; }
.footer-brand p { color: var(--text-muted); font-size: 0.875rem; margin-top: 12px; line-height: 1.6; }
.footer-links { display: flex; gap: 48px; flex-wrap: wrap; }
.footer-col { display: flex; flex-direction: column; gap: 12px; }
.footer-col h4 { font-size: 0.8rem; font-weight: 700; text-transform: uppercase; letter-spacing: 1.5px; color: var(--text-muted); }
.footer-col a { color: var(--text-muted); text-decoration: none; font-size: 0.875rem; transition: color var(--transition); }
.footer-col a:hover { color: var(--text); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
}
.footer-bottom .container { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; font-size: 0.8rem; color: var(--text-dim); }

/* ============================================================
   ROOM PAGE STYLES
   ============================================================ */

/* Room layout */
.room-page { display: flex; flex-direction: column; min-height: 100vh; }
.room-header { 
  position: sticky; top: 0; z-index: 50;
  background: rgba(9,9,15,0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}
.room-nav { display: flex; align-items: center; gap: 16px; }
.room-nav .logo { margin-right: auto; }
.room-status { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; color: var(--text-muted); }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--text-dim); transition: all var(--transition); }
.status-dot.connecting { background: var(--warning); animation: pulse 1.5s infinite; }
.status-dot.connected { background: var(--success); }
.status-dot.disconnected { background: var(--danger); }

/* Modal overlay */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: flex; align-items: center; justify-content: center;
  z-index: 200;
  transition: opacity 0.2s ease, backdrop-filter 0.2s ease;
  padding: 24px;
}
.modal-overlay.hidden { opacity: 0; pointer-events: none; }
.modal-box {
  background: rgba(17,17,32,0.92);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-xl);
  padding: 36px;
  max-width: 460px;
  width: 100%;
  backdrop-filter: blur(40px);
  -webkit-backdrop-filter: blur(40px);
  box-shadow: 0 32px 80px rgba(0,0,0,0.7), inset 0 1px 0 rgba(255,255,255,0.08);
  animation: modalIn 0.35s var(--ease-spring) both;
}
@keyframes modalIn { from{transform:scale(0.88) translateY(24px);opacity:0} to{transform:none;opacity:1} }
.modal-box h2 { font-size: 1.4rem; font-weight: 800; margin-bottom: 6px; letter-spacing: -0.5px; }
.modal-box > p { color: var(--text-muted); font-size: 0.875rem; margin-bottom: 24px; line-height: 1.5; }
.modal-tabs {
  display: flex; gap: 3px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 14px; padding: 4px; margin-bottom: 24px;
}
.modal-tab {
  flex: 1; text-align: center; padding: 9px 12px; border-radius: 10px;
  cursor: pointer; font-size: 0.85rem; font-weight: 600;
  color: var(--text-muted); transition: all 0.2s var(--ease-out);
  user-select: none;
}
.modal-tab.active { background: var(--grad); color: white; box-shadow: 0 4px 16px rgba(99,102,241,0.35); }
.modal-tab-content { display: none; }
.modal-tab-content.active { display: block; }
.room-code-display {
  display: flex; align-items: center; gap: 12px;
  background: rgba(99,102,241,0.06);
  border: 1.5px solid rgba(99,102,241,0.2);
  border-radius: var(--radius);
  padding: 14px 18px;
  margin-bottom: 14px;
}
.room-code-value {
  flex: 1; font-size: 2rem; font-weight: 900;
  letter-spacing: 6px; font-family: 'Courier New', monospace;
  background: var(--grad);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
/* Join input */
.code-input-wrap { position: relative; margin-bottom: 14px; }
.code-input-wrap input {
  width: 100%;
  background: rgba(255,255,255,0.04);
  border: 1.5px solid var(--border);
  color: var(--text);
  padding: 16px 50px 16px 20px;
  border-radius: var(--radius);
  font-size: 1.4rem; font-family: 'Courier New', monospace;
  letter-spacing: 5px; font-weight: 800;
  text-transform: uppercase;
  transition: all 0.22s var(--ease-out);
  outline: none; text-align: center;
}
.code-input-wrap input:focus { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(99,102,241,0.15); background: rgba(99,102,241,0.05); }
.code-input-wrap input::placeholder { color: var(--text-dim); letter-spacing: 2px; font-size: 1rem; font-weight: 400; }
.code-input-wrap input.valid { border-color: var(--success); box-shadow: 0 0 0 4px rgba(16,185,129,0.12); }
.code-input-wrap input.invalid { border-color: var(--danger); box-shadow: 0 0 0 4px rgba(239,68,68,0.10); }
.code-char-count { position: absolute; right: 14px; top: 50%; transform: translateY(-50%); font-size: 0.75rem; color: var(--text-dim); pointer-events: none; transition: color var(--transition); }
.code-char-count.complete { color: var(--success); }
/* Generic input */
.input-group { position: relative; margin-bottom: 14px; }
.input-group input {
  width: 100%; background: rgba(255,255,255,0.04); border: 1.5px solid var(--border);
  color: var(--text); padding: 13px 16px; border-radius: var(--radius);
  font-size: 1rem; font-family: inherit; transition: all 0.22s var(--ease-out);
  outline: none;
}
.input-group input:focus { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(99,102,241,0.15); }
.input-group input::placeholder { color: var(--text-dim); }
.input-group input.uppercase { text-transform: uppercase; letter-spacing: 2px; font-size: 1.1rem; font-weight: 700; }
.modal-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 4px; }

/* Room Main Content */
.room-main { display: grid; grid-template-columns: 280px 1fr; gap: 20px; padding: 24px; flex: 1; max-width: 1200px; margin: 0 auto; width: 100%; }

/* Sidebar — peers */
.sidebar {
  display: flex; flex-direction: column; gap: 16px;
}
.sidebar-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
}
.sidebar-card h3 { font-size: 0.8rem; font-weight: 700; text-transform: uppercase; letter-spacing: 1.5px; color: var(--text-muted); margin-bottom: 16px; }
.peer-list { display: flex; flex-direction: column; gap: 10px; }
.peer-item { display: flex; align-items: center; gap: 10px; }
.peer-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.875rem; font-weight: 800; color: white; flex-shrink: 0;
  position: relative;
}
.peer-avatar::after {
  content: ''; position: absolute; bottom: 0; right: 0;
  width: 10px; height: 10px; border-radius: 50%; border: 2px solid var(--bg3);
  background: var(--success);
}
.peer-info { flex: 1; min-width: 0; }
.peer-name { font-size: 0.875rem; font-weight: 600; display: block; }
.peer-state { font-size: 0.75rem; color: var(--text-muted); }
.peer-item.self .peer-avatar::after { background: var(--primary); }

/* Room code card */
.room-code-card .room-code-row { display: flex; align-items: center; gap: 8px; }
.room-code-card .code-badge { font-size: 1.4rem; font-weight: 900; letter-spacing: 3px; font-family: monospace; background: var(--grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; flex: 1; }
.room-code-card .code-actions { display: flex; gap: 4px; }

/* QR code popup */
.qr-popup { position: relative; }
.qr-container { text-align: center; margin-top: 12px; }
.qr-container canvas { border-radius: 8px; }
.qr-container p { font-size: 0.75rem; color: var(--text-muted); margin-top: 6px; }

/* Main area */
.room-content { display: flex; flex-direction: column; gap: 20px; min-width: 0; }

/* Drop zone */
.drop-zone {
  background: rgba(255,255,255,0.03);
  border: 2px dashed rgba(255,255,255,0.12);
  border-radius: var(--radius-xl);
  padding: 52px 32px;
  text-align: center;
  transition: all 0.25s var(--ease-out);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
.drop-zone::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 50% 50%, rgba(99,102,241,0.12), transparent 70%);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.drop-zone:hover { border-color: rgba(99,102,241,0.5); background: rgba(99,102,241,0.04); }
.drop-zone:hover::before { opacity: 1; }
.drop-zone.drag-over { border-color: var(--primary); border-style: solid; background: rgba(99,102,241,0.08); transform: scale(1.015); box-shadow: 0 0 40px rgba(99,102,241,0.2); }
.drop-zone.drag-over::before { opacity: 1; }
.drop-zone-icon {
  width: 64px; height: 64px;
  background: rgba(99,102,241,0.1);
  border: 1px solid rgba(99,102,241,0.2);
  border-radius: 20px;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 20px;
  transition: all var(--transition);
  position: relative; z-index: 1;
}
.drop-zone:hover .drop-zone-icon, .drop-zone.drag-over .drop-zone-icon {
  background: rgba(99,102,241,0.2);
  transform: scale(1.1);
}
.drop-zone-icon svg { width: 30px; height: 30px; color: var(--primary-light); }
.drop-zone h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; position: relative; z-index: 1; }
.drop-zone p { color: var(--text-muted); font-size: 0.875rem; margin-bottom: 20px; position: relative; z-index: 1; }
.drop-zone-actions { display: flex; gap: 10px; justify-content: center; position: relative; z-index: 1; flex-wrap: wrap; }
#fileInput, #folderInput { display: none; }
.no-peers-msg { font-size: 0.8rem; color: var(--warning); background: rgba(245,158,11,0.08); border: 1px solid rgba(245,158,11,0.2); border-radius: 8px; padding: 8px 12px; position: relative; z-index: 1; }

/* Transfer cards section */
.transfers-section { display: flex; flex-direction: column; gap: 12px; }
.transfers-header { display: flex; align-items: center; justify-content: space-between; }
.transfers-header h3 { font-size: 0.8rem; font-weight: 700; text-transform: uppercase; letter-spacing: 1.5px; color: var(--text-muted); }
.transfers-list { display: flex; flex-direction: column; gap: 10px; }
.empty-transfers { text-align: center; padding: 32px; color: var(--text-muted); font-size: 0.875rem; }

/* Transfer card */
.transfer-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: all var(--transition);
  animation: slideIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes slideIn { from{transform:translateX(-10px);opacity:0} to{transform:none;opacity:1} }
.transfer-card.receiving { border-left: 3px solid var(--accent); }
.transfer-card.sending { border-left: 3px solid var(--primary); }
.transfer-card.done { border-left: 3px solid var(--success); opacity: 0.7; }
.transfer-card.error { border-left: 3px solid var(--danger); }
.file-icon {
  width: 44px; height: 44px; flex-shrink: 0;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
  background: var(--surface-hover);
}
.transfer-info { flex: 1; min-width: 0; }
.transfer-name { font-size: 0.9rem; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-bottom: 4px; }
.transfer-meta { font-size: 0.75rem; color: var(--text-muted); display: flex; gap: 12px; margin-bottom: 8px; align-items: center; flex-wrap: wrap; }
.transfer-badge { font-size: 0.7rem; font-weight: 600; padding: 2px 8px; border-radius: 4px; }
.transfer-badge.send { background: rgba(99,102,241,0.15); color: var(--primary-light); }
.transfer-badge.receive { background: rgba(6,182,212,0.15); color: var(--accent); }
.transfer-badge.done { background: rgba(16,185,129,0.15); color: var(--success); }
.transfer-badge.error { background: rgba(239,68,68,0.15); color: var(--danger); }
.progress-row { display: flex; align-items: center; gap: 10px; }
.progress-bar {
  flex: 1; height: 6px;
  background: rgba(255,255,255,0.07);
  border-radius: 3px; overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--grad);
  border-radius: 3px;
  transition: width 0.25s var(--ease-out);
  position: relative;
  overflow: hidden;
}
.progress-fill::after {
  content: '';
  position: absolute; top: 0; left: -100%; width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.35), transparent);
  animation: shimmer 1.5s infinite;
}
@keyframes shimmer { to { left: 200%; } }
@keyframes spin { to { transform: rotate(360deg); } }
.transfer-card.done .progress-fill::after { display: none; }
.transfer-card.receiving .progress-fill { background: linear-gradient(90deg, var(--accent), #6366f1); }
.transfer-card.done .progress-fill { background: linear-gradient(90deg, var(--success), #10b981); }
.progress-pct { font-size: 0.75rem; color: var(--text-muted); white-space: nowrap; }
.transfer-actions { display: flex; gap: 6px; flex-shrink: 0; }

/* Preview modal */
.preview-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.9);
  backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center;
  z-index: 300;
  padding: 24px;
}
.preview-overlay.hidden { display: none; }
.preview-box {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 24px;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.preview-header { display: flex; align-items: center; justify-content: space-between; }
.preview-header h3 { font-size: 0.95rem; font-weight: 700; }
.preview-content { flex: 1; overflow: auto; display: flex; align-items: center; justify-content: center; min-height: 200px; }
.preview-content img, .preview-content video, .preview-content audio { max-width: 100%; max-height: 60vh; border-radius: 8px; }
.preview-content audio { width: 100%; }

/* Toast notifications */
.toast-container { position: fixed; bottom: 28px; right: 28px; z-index: 400; display: flex; flex-direction: column; gap: 10px; }
.toast {
  background: rgba(17,17,32,0.95);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 13px 18px;
  font-size: 0.85rem;
  max-width: 340px;
  display: flex; align-items: flex-start; gap: 10px;
  animation: toastIn 0.4s var(--ease-spring) both;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  line-height: 1.5;
}
@keyframes toastIn { from{transform:translateX(110%) scale(0.9);opacity:0} to{transform:none;opacity:1} }
.toast.out { animation: toastOut 0.25s ease forwards; }
@keyframes toastOut { to{transform:translateX(110%);opacity:0} }
.toast-icon { font-size: 1rem; flex-shrink: 0; margin-top: 1px; }
.toast-text { flex: 1; color: var(--text); }
.toast-close { color: var(--text-dim); cursor: pointer; font-size: 1.1rem; padding: 0 2px; flex-shrink: 0; transition: color var(--transition); }
.toast-close:hover { color: var(--text); }
.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--danger); }
.toast.info { border-left: 3px solid var(--primary-light); }
.toast.warning { border-left: 3px solid var(--warning); }
.toast.success .toast-icon { color: var(--success); }
.toast.error .toast-icon { color: var(--danger); }
.toast.info .toast-icon { color: var(--primary-light); }
.toast.warning .toast-icon { color: var(--warning); }

/* History section */
.history-section { padding: 16px 0; }
.history-list { display: flex; flex-direction: column; gap: 8px; max-height: 200px; overflow-y: auto; }
.history-item {
  display: flex; align-items: center; gap: 10px;
  font-size: 0.8rem; color: var(--text-muted);
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}
.history-item:last-child { border-bottom: none; }
.history-item .file-icon { width: 32px; height: 32px; font-size: 1rem; border-radius: 8px; }
.history-info { flex: 1; min-width: 0; }
.history-name { font-weight: 600; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.history-time { font-size: 0.72rem; }

/* Incoming request notification */
.incoming-notification {
  position: fixed;
  top: 80px;
  right: 24px;
  z-index: 150;
  background: var(--bg3);
  border: 1px solid rgba(99,102,241,0.4);
  border-radius: var(--radius-lg);
  padding: 20px;
  max-width: 340px;
  box-shadow: var(--shadow-lg);
  animation: slideInRight 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes slideInRight { from{transform:translateX(110%);opacity:0} to{transform:none;opacity:1} }
.incoming-notification.hidden { display: none; }
.incoming-header { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.incoming-icon { font-size: 1.5rem; }
.incoming-header h4 { font-weight: 700; font-size: 0.95rem; }
.incoming-header p { color: var(--text-muted); font-size: 0.8rem; }
.incoming-file { background: var(--surface); border-radius: 10px; padding: 10px 14px; margin-bottom: 14px; }
.incoming-file .file-name { font-weight: 600; font-size: 0.875rem; }
.incoming-file .file-size { font-size: 0.8rem; color: var(--text-muted); }
.incoming-actions { display: flex; gap: 8px; }

/* Disconnected overlay */
.disconnected-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center;
  z-index: 250;
}
.disconnected-overlay.hidden { display: none; }
.disconnected-box { background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius-xl); padding: 40px; text-align: center; max-width: 400px; width: 90%; }
.disconnected-box svg { width: 48px; height: 48px; color: var(--warning); margin-bottom: 16px; }
.disconnected-box h3 { font-size: 1.2rem; font-weight: 800; margin-bottom: 8px; }
.disconnected-box p { color: var(--text-muted); font-size: 0.875rem; margin-bottom: 24px; }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .desktop-only { display: none; }
  .nav-links, .nav-actions { display: none; flex-direction: column; position: fixed; top: 64px; left: 0; right: 0; background: rgba(9,9,15,0.98); backdrop-filter: blur(20px); border-bottom: 1px solid var(--border); padding: 16px 24px; gap: 8px; }
  .nav-links.open, .nav-actions.open { display: flex; }
  .nav-actions.open { border-top: 1px solid var(--border); }
  .nav-toggle { display: flex; }
  .hero-title { letter-spacing: -1px; }
  .room-main { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .security-card { flex-direction: column; }
  .steps-row { flex-direction: column; align-items: stretch; }
  .step-connector { transform: rotate(90deg); margin: 4px auto; }
  .hero-visual { display: none; }
  .modal-box { padding: 28px 20px; }
  .room-code-value { font-size: 1.5rem; letter-spacing: 2px; }
  .features-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hero { padding: 100px 0 60px; }
  .hero-buttons { flex-direction: column; align-items: center; }
  .btn-large { width: 220px; justify-content: center; }
  .footer-inner { flex-direction: column; gap: 32px; }
  .footer-bottom .container { flex-direction: column; text-align: center; }
  .transfer-actions { flex-direction: column; }
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-hover); }

/* Utilities */
.hidden { display: none !important; }
.text-muted { color: var(--text-muted); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.divider { height: 1px; background: var(--border); margin: 16px 0; }

/* ===== Share Banner ===== */
.share-banner {
  background: rgba(99,102,241,0.07);
  border: 1.5px solid rgba(99,102,241,0.25);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  animation: slideUp 0.4s var(--ease-spring) both;
}
@keyframes slideUp { from{opacity:0;transform:translateY(12px)} to{opacity:1;transform:none} }
.share-banner-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.share-banner-left { flex: 1; min-width: 180px; }
.share-banner-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--text-muted);
  margin-bottom: 6px;
}
.share-banner-code {
  font-family: 'Courier New', monospace;
  font-size: 2.4rem;
  font-weight: 900;
  letter-spacing: 8px;
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
}
.share-banner-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  flex-shrink: 0;
}
@media (max-width: 600px) {
  .share-banner-code { font-size: 1.8rem; letter-spacing: 5px; }
  .share-banner-actions { width: 100%; }
}