/* KasSee Web — Hardware-grade companion aesthetic
 * Design language: crypto terminal meets refined wallet
 * Palette: deep space #080c12, surface #111820, teal #49EACB, bone #d4d8de
 */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600;700&family=Outfit:wght@300;400;500;600;700&display=swap');

:root {
    --bg: #080c12;
    --surface: #111820;
    --surface-2: #18202b;
    --border: #1e2a38;
    --border-focus: #2a3a4e;
    --teal: #49EACB;
    --teal-glow: rgba(73, 234, 203, 0.15);
    --teal-dim: #2ea88e;
    --text: #d4d8de;
    --text-dim: #6b7a8d;
    --text-muted: #3d4d5e;
    --danger: #e5534b;
    --success: #3fb950;
    --warning: #d29922;
    --radius: 14px;
    --radius-sm: 10px;
    --mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
    --sans: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html, body {
    height: 100%;
    font-family: var(--sans);
    background: var(--bg);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow: hidden;
}

#app {
    display: flex;
    flex-direction: column;
    height: 100%;
    max-width: 480px;
    margin: 0 auto;
    position: relative;
}

/* ─── Header ─── */

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 20px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    background: var(--bg);
    z-index: 10;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-logo {
    height: 24px;
    width: auto;
}

.header-brand .title {
    font-family: var(--mono);
    font-size: 17px;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: none;
    background: linear-gradient(135deg, var(--teal), #7af5dd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: var(--mono);
    font-size: 11px;
    color: var(--text-dim);
    letter-spacing: 0.5px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-social {
    color: var(--text-dim);
    display: flex;
    align-items: center;
    padding: 4px;
    transition: color var(--transition);
    text-decoration: none;
}

.header-social:hover {
    color: var(--text);
}

.header-settings-btn {
    background: none;
    border: none;
    color: var(--text-dim);
    font-size: 22px;
    cursor: pointer;
    padding: 4px;
    transition: color var(--transition);
}

.header-settings-btn:hover,
.header-settings-btn.active {
    color: var(--teal);
}

/* ─── Gear menu panel ─── */

.gear-menu {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 0 16px;
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    transition: max-height 0.25s ease, opacity 0.2s ease, padding 0.25s ease;
}

.gear-menu.visible {
    max-height: 60px;
    opacity: 1;
    padding: 8px 16px;
}

.gear-menu-tabs {
    display: flex;
    gap: 4px;
}

.gear-tab {
    flex: 1;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-dim);
    font-family: var(--mono);
    font-size: 11px;
    font-weight: 500;
    padding: 8px 4px;
    cursor: pointer;
    text-align: center;
    transition: all var(--transition);
    letter-spacing: 0.3px;
}

.gear-tab:active {
    transform: scale(0.96);
}

.gear-tab.active {
    border-color: var(--teal);
    color: var(--teal);
    background: var(--teal-glow);
}

.dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    display: inline-block;
}

.dot.offline { background: var(--danger); box-shadow: 0 0 6px rgba(229, 83, 75, 0.4); }
.dot.connecting { background: var(--warning); animation: pulse 1.2s ease-in-out infinite; }
.dot.online { background: var(--success); box-shadow: 0 0 6px rgba(63, 185, 80, 0.4); }

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.85); }
}

/* ─── Main / Screens ─── */

main {
    flex: 1;
    overflow-y: auto;
    position: relative;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

main::-webkit-scrollbar { width: 4px; }
main::-webkit-scrollbar-track { background: transparent; }
main::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.screen {
    display: none;
    padding: 20px;
    animation: screenIn 0.25s ease-out;
}

.screen.active {
    display: block;
}

@keyframes screenIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.screen-content {
    max-width: 380px;
    margin: 0 auto;
}

h2 {
    font-family: var(--sans);
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 4px;
    text-align: center;
    color: var(--text);
}

.subtitle {
    text-align: center;
    color: var(--text-dim);
    font-size: 13px;
    font-weight: 400;
    margin-bottom: 20px;
}

/* ─── Cards ─── */

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
    margin-top: 16px;
}

.balance-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 24px;
    text-align: center;
    margin-bottom: 20px;
    position: relative;
    overflow: hidden;
}

.balance-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--teal), transparent);
}

.balance-label {
    font-family: var(--mono);
    font-size: 11px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 8px;
}

.balance-amount {
    font-family: var(--mono);
    font-size: 32px;
    font-weight: 700;
    color: var(--teal);
    margin-bottom: 4px;
    letter-spacing: -0.5px;
    text-shadow: 0 0 30px var(--teal-glow);
}

.balance-sub {
    font-family: var(--mono);
    font-size: 12px;
    color: var(--text-dim);
    letter-spacing: 0.5px;
}

.balance-info {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 10px;
}

/* ─── Buttons ─── */

.btn {
    display: block;
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--sans);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    text-align: center;
    letter-spacing: 0.3px;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: var(--teal-dim);
    color: var(--bg);
    box-shadow: 0 2px 10px rgba(46, 168, 142, 0.2);
}

.btn-primary:hover {
    background: var(--teal);
    box-shadow: 0 4px 16px rgba(46, 168, 142, 0.3);
}

.btn-secondary {
    background: var(--surface-2);
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    border-color: var(--border-focus);
    background: #1d2736;
}

.btn-outline {
    background: transparent;
    color: var(--teal);
    border: 1px solid var(--teal-dim);
}

.btn-outline:hover {
    background: var(--teal-glow);
    border-color: var(--teal);
}

.btn-link {
    background: transparent;
    color: var(--text-dim);
    font-size: 13px;
    font-weight: 500;
    padding: 10px;
}

.btn-link:hover {
    color: var(--text);
}

.btn-danger {
    color: var(--danger);
}

.btn-large {
    padding: 16px;
    font-size: 16px;
}

.actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 16px;
}

.divider {
    text-align: center;
    color: var(--text-muted);
    font-size: 12px;
    font-family: var(--mono);
    letter-spacing: 1px;
    margin: 14px 0;
    position: relative;
}

.divider::before, .divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 38%;
    height: 1px;
    background: var(--border);
}

.divider::before { left: 0; }
.divider::after { right: 0; }

/* ─── Inputs ─── */

.input-label {
    display: block;
    font-family: var(--mono);
    font-size: 11px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-bottom: 6px;
    margin-top: 14px;
}

.input-text {
    display: block;
    width: 100%;
    padding: 13px 14px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-family: var(--mono);
    font-size: 14px;
    margin-bottom: 12px;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.input-text:focus {
    outline: none;
    border-color: var(--teal-dim);
    box-shadow: 0 0 0 3px var(--teal-glow);
}

.input-text::placeholder {
    color: var(--text-muted);
}

.input-textarea {
    resize: vertical;
    min-height: 80px;
    font-size: 12px;
    word-break: break-all;
    line-height: 1.5;
}

/* ─── QR Display ─── */

.qr-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 20px 0;
    transition: opacity 0.1s ease;
}

.qr-container svg {
    width: 260px;
    height: 260px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: #fff;
    padding: 8px;
}

.qr-frame-info {
    text-align: center;
    font-family: var(--mono);
    font-size: 12px;
    color: var(--text-dim);
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

.frame-dots {
    display: flex;
    justify-content: center;
    gap: 6px;
    margin: 8px 0;
}

.frame-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border);
    transition: all 0.2s ease;
}

.frame-dot.active {
    background: var(--teal);
    box-shadow: 0 0 8px var(--teal-glow);
    transform: scale(1.3);
}

.frame-controls {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin: 6px 0;
}

.btn-frame {
    background: none;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-dim);
    font-size: 14px;
    padding: 6px 14px;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-frame:hover,
.btn-frame:active {
    border-color: var(--teal);
    color: var(--teal);
}

/* ─── Address display ─── */

.address-display {
    font-family: var(--mono);
    font-size: 12px;
    word-break: break-all;
    padding: 14px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin: 14px 0;
    text-align: center;
    color: var(--teal);
    line-height: 1.6;
    letter-spacing: 0.3px;
}

.address-list {
    margin: 16px 0;
}

.addr-section-title {
    font-family: var(--mono);
    font-size: 11px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin: 16px 0 8px;
}

.addr-item {
    display: flex;
    align-items: baseline;
    gap: 8px;
    padding: 8px 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 6px;
    cursor: pointer;
    transition: border-color var(--transition);
}

.addr-item:active {
    border-color: var(--teal-dim);
}

.addr-idx {
    font-family: var(--mono);
    font-size: 11px;
    color: var(--text-muted);
    flex-shrink: 0;
    min-width: 24px;
}

.addr-val {
    font-family: var(--mono);
    font-size: 11px;
    color: var(--teal);
    word-break: break-all;
    line-height: 1.5;
    flex: 1;
}

.copy-icon {
    font-size: 16px;
    color: var(--text-muted);
    flex-shrink: 0;
    transition: color 0.2s;
}

.addr-item:active .copy-icon {
    color: var(--teal);
}

/* ─── UTXO items ─── */

.utxo-item {
    padding: 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 6px;
}

.utxo-amount {
    font-family: var(--mono);
    font-size: 14px;
    font-weight: 600;
    color: var(--teal);
    margin-bottom: 4px;
}

.utxo-detail {
    font-family: var(--mono);
    font-size: 10px;
    color: var(--text-muted);
    word-break: break-all;
    line-height: 1.4;
}

/* ─── Scanner ─── */

.scanner-content {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.scanner-viewport {
    position: relative;
    width: 300px;
    height: 300px;
    margin: 16px 0;
    border-radius: var(--radius);
    overflow: hidden;
    background: #000;
    border: 1px solid var(--border);
}

.scanner-viewport video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.scanner-guide {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    border: 2px solid var(--teal);
    border-radius: 8px;
    pointer-events: none;
    box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.4);
    animation: scanPulse 2s ease-in-out infinite;
}

@keyframes scanPulse {
    0%, 100% { border-color: var(--teal); }
    50% { border-color: rgba(73, 234, 203, 0.5); }
}

.scanner-status {
    font-family: var(--mono);
    font-size: 12px;
    color: var(--text-dim);
    text-align: center;
    margin: 8px 0;
    letter-spacing: 0.5px;
}

/* ─── Result card ─── */

.result-card {
    margin-top: 16px;
    padding: 16px;
    border-radius: var(--radius-sm);
    text-align: center;
}

.result-card.success {
    background: rgba(63, 185, 80, 0.08);
    border: 1px solid rgba(63, 185, 80, 0.3);
    color: var(--success);
}

.result-card.error {
    background: rgba(229, 83, 75, 0.08);
    border: 1px solid rgba(229, 83, 75, 0.3);
    color: var(--danger);
}

.result-card .tx-id {
    font-family: var(--mono);
    font-size: 11px;
    word-break: break-all;
    margin-top: 8px;
    color: var(--text);
    line-height: 1.5;
}

/* ─── Loading ─── */

.loading {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: rgba(8, 12, 18, 0.92);
    backdrop-filter: blur(8px);
    z-index: 100;
}

.spinner {
    width: 32px;
    height: 32px;
    border: 2px solid var(--border);
    border-top-color: var(--teal);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-msg {
    margin-top: 14px;
    font-family: var(--mono);
    font-size: 12px;
    color: var(--text-dim);
    letter-spacing: 0.5px;
}

/* ─── Utilities ─── */

.hidden {
    display: none !important;
}

/* ─── Responsive ─── */

@media (min-width: 768px) {
    #app {
        max-width: 420px;
        border-left: 1px solid var(--border);
        border-right: 1px solid var(--border);
        box-shadow: -1px 0 20px rgba(0,0,0,0.3), 1px 0 20px rgba(0,0,0,0.3);
    }
}

/* ─── Toast notification ─── */

.toast {
    position: fixed;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    font-family: var(--mono);
    font-size: 13px;
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    z-index: 200;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.25s ease, transform 0.25s ease;
    max-width: 360px;
    text-align: center;
    line-height: 1.4;
}

.toast.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

.toast.toast-error {
    background: rgba(229, 83, 75, 0.14);
    border: 1px solid rgba(229, 83, 75, 0.4);
    color: var(--danger);
    backdrop-filter: blur(12px);
}

.toast.toast-ok {
    background: rgba(63, 185, 80, 0.14);
    border: 1px solid rgba(63, 185, 80, 0.4);
    color: var(--success);
    backdrop-filter: blur(12px);
}

.toast.toast-info {
    background: rgba(73, 234, 203, 0.10);
    border: 1px solid rgba(73, 234, 203, 0.3);
    color: var(--teal);
    backdrop-filter: blur(12px);
}

/* ─── Send balance reference ─── */

.send-balance-ref {
    font-family: var(--mono);
    font-size: 12px;
    color: var(--text-dim);
    text-align: center;
    margin-bottom: 8px;
    letter-spacing: 0.3px;
}

/* ─── Extra recipients (compound TX) ─── */

.recipient-row {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px;
    margin: 8px 0;
    position: relative;
}

.recipient-row .input-text {
    margin-bottom: 6px;
}

.recipient-remove {
    position: absolute;
    top: 8px;
    right: 8px;
    background: none;
    border: none;
    color: var(--danger);
    font-size: 16px;
    cursor: pointer;
    padding: 2px 6px;
    opacity: 0.6;
    transition: opacity var(--transition);
}

.recipient-remove:hover {
    opacity: 1;
}

/* ─── Broadcast warning ─── */

.broadcast-warning {
    background: rgba(210, 153, 34, 0.12);
    border: 1px solid rgba(210, 153, 34, 0.4);
    color: var(--warning);
    font-family: var(--mono);
    font-size: 12px;
    text-align: center;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
    letter-spacing: 0.3px;
}

/* ─── Fee cards ─── */

.fee-cards {
    display: flex;
    gap: 8px;
    margin-bottom: 10px;
}

.fee-card {
    flex: 1;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 6px;
    cursor: pointer;
    text-align: center;
    transition: all var(--transition);
}

.fee-card:active {
    transform: scale(0.97);
}

.fee-card-active {
    border-color: var(--teal);
    background: var(--teal-glow);
}

.fee-card-label {
    font-family: var(--sans);
    font-size: 12px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 4px;
}

.fee-card-active .fee-card-label {
    color: var(--teal);
}

.fee-card-amount {
    font-family: var(--mono);
    font-size: 10px;
    color: var(--text-muted);
    letter-spacing: 0.3px;
}

.fee-card-time {
    font-family: var(--mono);
    font-size: 9px;
    color: var(--teal);
    opacity: 0.7;
    margin-top: 2px;
}

/* ─── Broadcast result (enhanced) ─── */

.result-icon {
    font-size: 36px;
    margin-bottom: 8px;
}

.result-msg {
    font-family: var(--sans);
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 8px;
}

.result-card.success .result-icon::after { content: '✓'; }
.result-card.success .result-msg { color: var(--success); }
.result-card.error .result-icon::after { content: '✗'; }
.result-card.error .result-msg { color: var(--danger); }

/* ─── Transaction history ─── */

.history-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 6px;
}

.history-icon {
    font-size: 18px;
    flex-shrink: 0;
    width: 28px;
    text-align: center;
}

.history-icon.incoming { color: var(--success); }
.history-icon.outgoing { color: var(--danger); }

.history-info {
    flex: 1;
    min-width: 0;
}

.history-amount {
    font-family: var(--mono);
    font-size: 14px;
    font-weight: 600;
}

.history-amount.incoming { color: var(--success); }
.history-amount.outgoing { color: var(--danger); }

.history-time {
    font-family: var(--mono);
    font-size: 10px;
    color: var(--text-muted);
    margin-top: 2px;
}

/* ─── Token items (KRC20) ─── */

.token-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 6px;
}

.token-tick {
    font-family: var(--mono);
    font-size: 14px;
    font-weight: 700;
    color: var(--teal);
    min-width: 60px;
    text-transform: uppercase;
}

.token-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.token-balance {
    font-family: var(--mono);
    font-size: 13px;
    color: var(--text);
    flex: 1;
    text-align: right;
}

.tokens-section-label {
    font-family: var(--mono);
    font-size: 11px;
    font-weight: 600;
    color: var(--text-dim);
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-bottom: 6px;
}

/* ─── NFT items (KRC721) ─── */

.nft-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 6px;
}

.nft-thumb {
    width: 48px;
    height: 48px;
    border-radius: 6px;
    object-fit: cover;
    background: var(--bg);
    border: 1px solid var(--border);
}

.nft-thumb-placeholder {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
}

.nft-info {
    flex: 1;
    min-width: 0;
}

.nft-tick {
    font-family: var(--mono);
    font-size: 13px;
    font-weight: 700;
    color: var(--teal);
    text-transform: uppercase;
}

.nft-id {
    font-family: var(--mono);
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 2px;
}

/* ─── Donation / support screen ─── */

.donate-motto {
    font-family: var(--mono);
    font-size: 13px;
    font-weight: 500;
    font-style: italic;
    color: var(--text);
    letter-spacing: 0.3px;
    line-height: 1.6;
    margin-bottom: 16px;
    opacity: 0.85;
}

.donate-kns {
    font-family: var(--mono);
    font-size: 16px;
    font-weight: 600;
    color: var(--teal);
    margin: 8px 0;
    letter-spacing: 0.5px;
}

.donate-qr svg {
    width: 180px;
    height: 180px;
}

.donate-buttons {
    display: flex;
    gap: 10px;
    margin-top: 14px;
}

.donate-buttons .btn {
    flex: 1;
    padding: 13px;
    font-size: 13px;
}

#btn-copy-donate {
    border-color: var(--teal);
    color: var(--teal);
}

#btn-donate-skip {
    border-color: rgba(229, 83, 75, 0.3);
    color: var(--text-dim);
}

#btn-donate-skip:hover,
#btn-donate-skip:active {
    border-color: var(--danger);
    color: var(--danger);
    background: rgba(229, 83, 75, 0.08);
}

/* ─── Safe area (notch devices) ─── */

@supports (padding-top: env(safe-area-inset-top)) {
    header {
        padding-top: calc(14px + env(safe-area-inset-top));
    }
}