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

:root {
  --black: #080808;
  --white: #ffffff;
  --gray1: #111111;
  --gray2: #1a1a1a;
  --gray3: #2a2a2a;
  --gray4: #444444;
  --gray5: #888888;
  --gray6: #bbbbbb;
  --blur: blur(3.5px);
  --glass-bg: rgba(255,255,255,0.04);
  --glass-border: rgba(255,255,255,0.09);
  --radius: 16px;
  --radius-sm: 10px;
}

html, body { height: 100%; background: var(--black); color: var(--white); font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 16px; line-height: 1.6; overflow-x: hidden; }

.noise { position: fixed; inset: 0; pointer-events: none; z-index: 0; opacity: 0.025; background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E"); background-size: 200px 200px; }

header { position: fixed; top: 0; left: 0; right: 0; z-index: 100; display: flex; align-items: center; justify-content: space-between; padding: 16px 28px; background: rgba(8,8,8,0.75); backdrop-filter: var(--blur); -webkit-backdrop-filter: var(--blur); border-bottom: 0.5px solid var(--glass-border); }

.logo { display: flex; align-items: center; gap: 12px; font-size: 17px; font-weight: 700; letter-spacing: 0.5px; }
.logo em { font-style: normal; color: var(--gray5); font-weight: 400; }

.header-right { display: flex; align-items: center; gap: 20px; }

.status-bar { display: flex; align-items: center; gap: 7px; font-size: 11px; color: var(--gray5); letter-spacing: 1px; }
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--gray4); display: inline-block; }
.dot.connected { background: #4ade80; }
.dot.green { background: #4ade80; }

.user-badge { display: flex; align-items: center; gap: 10px; font-size: 12px; background: var(--glass-bg); border: 0.5px solid var(--glass-border); border-radius: 30px; padding: 6px 14px; backdrop-filter: var(--blur); }
.user-badge.hidden { display: none; }
#user-cp { color: var(--gray5); font-variant-numeric: tabular-nums; letter-spacing: 1px; }
#user-name { color: var(--white); font-weight: 500; }
.logout-btn { background: none; border: none; color: var(--gray5); cursor: pointer; font-size: 14px; padding: 0; transition: color 0.2s; }
.logout-btn:hover { color: var(--white); }

main { min-height: 100vh; padding-top: 80px; position: relative; z-index: 1; }

.view { display: none; padding: 40px 28px; max-width: 500px; margin: 0 auto; animation: fadeUp 0.35s ease; }
.view.active { display: block; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }

/* ── AUTH ── */
.auth-wrap { display: flex; flex-direction: column; gap: 20px; }

.usb-card { background: var(--glass-bg); border: 0.5px solid var(--glass-border); backdrop-filter: var(--blur); border-radius: var(--radius); padding: 28px 24px; text-align: center; display: flex; flex-direction: column; align-items: center; gap: 10px; transition: border-color 0.3s; }
.usb-card.detected { border-color: #4ade8066; background: rgba(74,222,128,0.04); }
.usb-card.detected .usb-icon { color: #4ade80; }
.usb-icon { color: var(--gray5); transition: color 0.3s; }
.usb-card p { font-size: 14px; color: var(--gray6); }
.usb-card small { font-size: 12px; color: var(--gray4); }

.auth-tabs { display: flex; gap: 4px; background: var(--gray1); border-radius: var(--radius-sm); padding: 4px; }
.auth-tab { flex: 1; background: none; border: none; color: var(--gray5); font-size: 13px; padding: 10px; border-radius: 8px; cursor: pointer; transition: background 0.2s, color 0.2s; font-family: inherit; }
.auth-tab.active { background: var(--gray2); color: var(--white); }

.form-glass { background: var(--glass-bg); border: 0.5px solid var(--glass-border); backdrop-filter: var(--blur); border-radius: var(--radius); padding: 28px; display: flex; flex-direction: column; gap: 10px; }
.form-glass.hidden { display: none; }

label { font-size: 11px; color: var(--gray5); letter-spacing: 1px; text-transform: uppercase; }
label small { font-size: 10px; text-transform: none; letter-spacing: 0; color: var(--gray4); }

input[type=text], input[type=password], input[type=date], input[type=number] { background: rgba(255,255,255,0.05); border: 0.5px solid var(--glass-border); border-radius: var(--radius-sm); color: var(--white); font-size: 14px; padding: 11px 14px; outline: none; width: 100%; transition: border-color 0.2s; font-family: inherit; }
input:focus { border-color: rgba(255,255,255,0.3); }
input::placeholder { color: var(--gray4); }

.form-error { background: rgba(239,68,68,0.08); border: 0.5px solid rgba(239,68,68,0.25); border-radius: 8px; padding: 10px 14px; font-size: 13px; color: #fca5a5; }
.form-error.hidden { display: none; }

.usb-mini { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--gray5); padding: 8px 0; }

.btn-primary { background: var(--white); color: var(--black); border: none; border-radius: var(--radius-sm); padding: 13px 24px; font-size: 14px; font-weight: 700; cursor: pointer; width: 100%; margin-top: 4px; transition: opacity 0.2s, transform 0.15s; letter-spacing: 0.3px; font-family: inherit; }
.btn-primary:hover { opacity: 0.88; }
.btn-primary:active { transform: scale(0.98); }

/* ── KEY CREATED ── */
.key-created-wrap { display: flex; flex-direction: column; align-items: center; gap: 20px; text-align: center; padding-top: 20px; }
.key-icon { font-size: 52px; }
.key-created-wrap h2 { font-size: 26px; font-weight: 700; }
.key-sub { color: var(--gray5); font-size: 14px; }
.key-info-box { background: var(--glass-bg); border: 0.5px solid var(--glass-border); backdrop-filter: var(--blur); border-radius: var(--radius); padding: 24px 28px; width: 100%; display: flex; flex-direction: column; gap: 14px; text-align: left; }
.key-row { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.key-label { font-size: 11px; color: var(--gray5); letter-spacing: 1px; text-transform: uppercase; }
.key-value { font-size: 15px; font-weight: 600; font-variant-numeric: tabular-nums; letter-spacing: 1px; }
.key-note { font-size: 12px; color: var(--gray4); max-width: 320px; line-height: 1.6; }

/* ── HOME ── */
.hero { margin-bottom: 44px; padding-top: 16px; }
.hero h1 { font-size: clamp(40px, 8vw, 60px); font-weight: 700; line-height: 1.05; letter-spacing: -2px; margin-bottom: 14px; }
.hero p { font-size: 14px; color: var(--gray5); }
.hero strong { color: var(--white); }

.action-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.card-btn { background: var(--glass-bg); border: 0.5px solid var(--glass-border); backdrop-filter: var(--blur); border-radius: var(--radius); padding: 26px 22px; cursor: pointer; color: var(--white); text-align: left; transition: background 0.2s, border-color 0.2s, transform 0.15s; display: flex; flex-direction: column; gap: 10px; font-family: inherit; }
.card-btn:hover { background: rgba(255,255,255,0.07); border-color: rgba(255,255,255,0.16); transform: translateY(-2px); }
.card-icon { width: 42px; height: 42px; border: 0.5px solid var(--glass-border); border-radius: 10px; display: flex; align-items: center; justify-content: center; }
.card-title { font-size: 15px; font-weight: 600; }
.card-sub { font-size: 11px; color: var(--gray5); }

/* ── BACK ── */
.back-bar { margin-bottom: 24px; }
.back-bar button { background: none; border: none; color: var(--gray5); cursor: pointer; font-size: 13px; padding: 0; transition: color 0.2s; font-family: inherit; }
.back-bar button:hover { color: var(--white); }
h2 { font-size: 26px; font-weight: 700; letter-spacing: -0.5px; margin-bottom: 24px; }

/* ── QR ── */
.qr-wrap { display: flex; flex-direction: column; align-items: center; gap: 16px; margin-bottom: 28px; }
#qr-img { width: 210px; height: 210px; border-radius: var(--radius); border: 0.5px solid var(--glass-border); background: #fff; padding: 8px; }
.qr-timer { display: flex; flex-direction: column; align-items: center; font-size: 11px; color: var(--gray5); letter-spacing: 1px; gap: 2px; }
#qr-countdown { font-size: 20px; font-weight: 700; color: var(--white); font-variant-numeric: tabular-nums; }

.file-drop-zone { border: 0.5px dashed var(--gray3); border-radius: var(--radius); padding: 28px; text-align: center; cursor: pointer; transition: border-color 0.2s, background 0.2s; display: flex; flex-direction: column; align-items: center; gap: 8px; color: var(--gray5); margin-bottom: 16px; }
.file-drop-zone:hover { border-color: var(--gray5); background: var(--glass-bg); }
.file-drop-zone p { font-size: 13px; }
.file-drop-zone small { font-size: 11px; color: var(--gray4); }

.peer-status { display: flex; align-items: center; gap: 8px; font-size: 12px; color: #4ade80; justify-content: center; margin-top: 12px; }
.peer-status.hidden { display: none; }

/* ── CAMERA ── */
.camera-wrap { position: relative; border-radius: var(--radius); overflow: hidden; background: var(--gray1); aspect-ratio: 1; max-width: 360px; margin: 0 auto; }
#camera-feed { width: 100%; height: 100%; object-fit: cover; display: block; }
.scan-frame { position: absolute; inset: 28px; pointer-events: none; }
.corner { position: absolute; width: 22px; height: 22px; border-color: white; border-style: solid; opacity: 0.9; }
.corner.tl { top: 0; left: 0; border-width: 2px 0 0 2px; }
.corner.tr { top: 0; right: 0; border-width: 2px 2px 0 0; }
.corner.bl { bottom: 0; left: 0; border-width: 0 0 2px 2px; }
.corner.br { bottom: 0; right: 0; border-width: 0 2px 2px 0; }
.scan-line { position: absolute; left: 0; right: 0; height: 1.5px; background: white; opacity: 0.5; animation: scanMove 2.5s ease-in-out infinite; }
@keyframes scanMove { 0%,100% { top: 0; } 50% { top: 100%; } }
.cam-overlay { position: absolute; inset: 0; background: rgba(8,8,8,0.65); backdrop-filter: var(--blur); display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 18px; color: var(--gray6); font-size: 13px; letter-spacing: 1px; }
.cam-overlay.hidden { display: none; }

/* ── PROCESSING ── */
.process-center { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 60vh; gap: 22px; text-align: center; }
.process-center h2 { font-size: 22px; margin-bottom: 0; }
.process-center p { color: var(--gray5); font-size: 13px; }
.process-steps { display: flex; flex-direction: column; gap: 10px; margin-top: 12px; width: 100%; max-width: 260px; }
.step { display: flex; align-items: center; gap: 10px; font-size: 12px; color: var(--gray4); transition: color 0.4s; letter-spacing: 0.5px; }
.step.done { color: var(--white); }
.step-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--gray3); border: 1px solid var(--gray4); flex-shrink: 0; transition: background 0.4s; }
.step.done .step-dot { background: var(--white); border-color: var(--white); }

/* ── TRANSFER ── */
.transfer-header { text-align: center; margin-bottom: 28px; }
.transfer-anim { display: flex; justify-content: center; margin-bottom: 20px; }
.transfer-header h2 { font-size: 24px; }
.transfer-header p { color: var(--gray5); font-size: 13px; }
.transfer-header strong { color: var(--white); }
.files-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; }
.file-item { background: var(--glass-bg); border: 0.5px solid var(--glass-border); backdrop-filter: var(--blur); border-radius: var(--radius-sm); padding: 14px 18px; display: flex; align-items: center; gap: 12px; }
.file-icon { width: 34px; height: 34px; border: 0.5px solid var(--glass-border); border-radius: 8px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.file-name { font-size: 13px; font-weight: 500; flex: 1; word-break: break-all; }
.file-size { font-size: 11px; color: var(--gray5); flex-shrink: 0; }
.expire-note { text-align: center; font-size: 11px; color: var(--gray4); margin-top: 12px; letter-spacing: 0.5px; }
#dl-countdown { color: var(--white); font-weight: 600; }

/* ── SUCCESS ── */
.success-center { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 70vh; text-align: center; gap: 14px; }
.success-icon { width: 76px; height: 76px; border-radius: 50%; border: 0.5px solid var(--glass-border); background: var(--glass-bg); backdrop-filter: var(--blur); display: flex; align-items: center; justify-content: center; margin-bottom: 6px; }
.success-center h2 { font-size: 26px; }
.success-center p { color: var(--gray5); }

/* ── ANIM 1: pulsing rings ── */
.loader-anim1 { width: 50px; height: 50px; display: inline-block; position: relative; flex-shrink: 0; }
.loader-anim1::after, .loader-anim1::before { content: ''; box-sizing: border-box; width: 50px; height: 50px; border-radius: 50%; border: 2px solid #fff; position: absolute; left: 0; top: 0; animation: anim1 2s linear infinite; }
.loader-anim1::after { animation-delay: 1s; }
@keyframes anim1 { 0% { transform: scale(0); opacity: 1; } 100% { transform: scale(1); opacity: 0; } }

/* ── ANIM 2: data bars ── */
.loader-anim2 { display: flex; align-items: flex-end; gap: 5px; height: 50px; }
.bar { width: 5px; background: white; border-radius: 2px; animation: barPulse 1.2s ease-in-out infinite; }
.bar:nth-child(1){animation-delay:0s;height:18px}
.bar:nth-child(2){animation-delay:.15s;height:30px}
.bar:nth-child(3){animation-delay:.3s;height:46px}
.bar:nth-child(4){animation-delay:.45s;height:34px}
.bar:nth-child(5){animation-delay:.6s;height:22px}
.bar:nth-child(6){animation-delay:.75s;height:38px}
.bar:nth-child(7){animation-delay:.9s;height:26px}
@keyframes barPulse { 0%,100%{opacity:.2;transform:scaleY(.5)} 50%{opacity:1;transform:scaleY(1)} }

@media(max-width:480px){ .action-grid{grid-template-columns:1fr} header{padding:14px 18px} .view{padding:28px 18px} }