@font-face {
    font-family: "Space Grotesk";
    src: url("/static/fonts/SpaceGrotesk-VariableFont_wght.ttf") format("truetype");
    font-weight: 300 700;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "IBM Plex Sans";
    src: url("/static/fonts/IBMPlexSans-VariableFont_wdth,wght.ttf") format("truetype");
    font-weight: 100 700;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "JetBrains Mono";
    src: url("/static/fonts/JetBrainsMono-VariableFont_wght.ttf") format("truetype");
    font-weight: 100 800;
    font-style: normal;
    font-display: swap;
}

:root {
    --bg: #0d1117;
    --surface: #161b22;
    --surface2: #21262d;
    --border: #30363d;
    --text: #c9d1d9;
    --text-muted: #8b949e;
    --accent: #58a6ff;
    --success: #3fb950;
    --warning: #e3b341;
    --error: #f85149;
    --sent-bg: #0d2137;
    --sent-border: #1a3a5c;
    --received-bg: #0d2e0d;
    --received-border: #1a4a1a;
    --radius: 8px;
    --sans: "IBM Plex Sans", "Segoe UI", system-ui, -apple-system, sans-serif;
    --display: "Space Grotesk", "IBM Plex Sans", "Segoe UI", system-ui, -apple-system, sans-serif;
    --mono: "JetBrains Mono", "Cascadia Code", "Consolas", "Fira Mono", monospace;
}

:root.light {
    --bg: #ffffff;
    --surface: #f6f8fa;
    --surface2: #eaeef2;
    --border: #d0d7de;
    --text: #1f2328;
    --text-muted: #656d76;
    --accent: #0969da;
    --success: #1a7f37;
    --warning: #9a6700;
    --error: #cf222e;
    --sent-bg: #ddf4ff;
    --sent-border: #80ccff;
    --received-bg: #d1f8db;
    --received-border: #82e59a;
}

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

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

html {
    height: 100%;
    font-size: 24px;
}

body {
    height: 100%;
    background: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    font-size: 1rem;
    line-height: 1.5;
}

h1,
h2,
h3 {
    font-family: var(--display);
}

/* --- Screens --- */

.screen {
    display: none;
    height: 100%;
}

.screen.active {
    display: flex;
}

/* --- Connect screen --- */

#screen-connect {
    align-items: center;
    justify-content: center;
    padding: 24px;
    position: relative;
}

.toolbar-top {
    position: absolute;
    top: 16px;
    right: 16px;
    display: flex;
    gap: 8px;
}

.connect-box {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 32px;
    width: 100%;
    max-width: 440px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.title-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.title-icon {
    flex-shrink: 0;
    display: block;
    width: 52px;
    height: 52px;
    object-fit: contain;
}

.connect-box h1 {
    font-family: var(--display);
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text);
    letter-spacing: -0.3px;
}

.connect-box .subtitle {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 8px;
}

.connect-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

input[type="password"] {
    width: 100%;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-family: var(--mono);
    font-size: 0.9rem;
    padding: 10px 14px;
    transition: border-color 0.15s;
}

input[type="password"]:focus {
    border-color: var(--accent);
    outline: 2px solid var(--accent);
    outline-offset: 1px;
}

input[type="password"]::placeholder {
    color: var(--text-muted);
}

button {
    cursor: pointer;
    border: none;
    border-radius: var(--radius);
    font-size: 0.85rem;
    font-weight: 500;
    padding: 10px 18px;
    transition: opacity 0.15s, background 0.15s;
    outline: none;
}

button:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

#btn-connect {
    background: var(--accent);
    color: #ffffff;
    font-size: 0.9rem;
    padding: 11px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

#btn-connect:hover:not(:disabled) {
    opacity: 0.88;
}

#connect-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.4);
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

#connect-spinner.hidden {
    display: none;
}

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

.connect-error {
    font-size: 0.75rem;
    color: var(--error);
    padding: 8px 12px;
    background: rgba(248, 81, 73, 0.1);
    border: 1px solid rgba(248, 81, 73, 0.3);
    border-radius: 6px;
}

.connect-error.hidden {
    display: none;
}

/* --- Password strength --- */

.password-strength {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.7rem;
}

.password-strength.hidden {
    display: none;
}

.strength-bar {
    flex: 1;
    height: 4px;
    background: var(--surface2);
    border-radius: 2px;
    overflow: hidden;
}

.strength-fill {
    height: 100%;
    border-radius: 2px;
    transition: width 0.2s, background 0.2s;
    width: 0%;
}

.strength-fill.weak { width: 25%; background: var(--error); }
.strength-fill.fair { width: 50%; background: var(--warning); }
.strength-fill.good { width: 75%; background: var(--success); }
.strength-fill.strong { width: 100%; background: var(--success); }

.strength-label {
    color: var(--text-muted);
    white-space: nowrap;
}

/* --- Mode toggle --- */

.mode-toggle {
    display: flex;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.mode-option {
    flex: 1;
    cursor: pointer;
    margin: 0;
}

.mode-option input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.mode-option span {
    display: block;
    text-align: center;
    padding: 8px 16px;
    font-size: 0.75rem;
    color: var(--text-muted);
    transition: background 0.15s, color 0.15s;
}

.mode-option input:checked + span {
    background: var(--accent);
    color: #ffffff;
}

.mode-option:first-child span {
    border-right: 1px solid var(--border);
}

.mode-description {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
    margin: 4px 0 0;
}

.security-note-details {
    border-top: 1px solid var(--border);
    padding-top: 10px;
}

.security-note-summary {
    font-size: 0.7rem;
    color: var(--text-muted);
    cursor: pointer;
    user-select: none;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 0;
}

.security-note-summary::-webkit-details-marker {
    display: none;
}

.security-note-summary::before {
    content: "▶";
    font-size: 0.5rem;
    display: inline-block;
    transition: transform 0.15s;
    flex-shrink: 0;
}

.security-note-details[open] .security-note-summary::before {
    transform: rotate(90deg);
}

.security-note {
    font-size: 0.7rem;
    color: var(--text-muted);
    padding-top: 8px;
    line-height: 1.6;
}

.connect-footer {
    position: absolute;
    bottom: 16px;
    font-size: 0.65rem;
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-muted);
}

.connect-footer a {
    color: var(--text-muted);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 5px;
}

.connect-footer a:hover {
    color: var(--accent);
}

/* --- Channel screen --- */

#screen-channel {
    flex-direction: column;
    height: 100%;
    position: relative;
}

.channel-header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 12px 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
    flex-wrap: wrap;
}

.status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
}

.dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    flex-shrink: 0;
}

.dot.waiting       { background: var(--warning); box-shadow: 0 0 6px var(--warning); }
.dot.key_exchange  { background: var(--warning); animation: pulse 1s ease-in-out infinite; }
.dot.connected     { background: var(--success); box-shadow: 0 0 6px var(--success); }
.dot.peer_left     { background: var(--error); }
.dot.reconnecting  { background: var(--warning); animation: pulse 1s ease-in-out infinite; }
.dot.disconnected  { background: var(--text-muted); }

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0.3; }
}

.fingerprint {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-family: var(--mono);
    display: none;
}

.fingerprint.visible {
    display: block;
    width: 100%;
    order: 10;
    border-top: 1px solid var(--border);
    padding-top: 8px;
}

.fingerprint strong {
    color: var(--warning);
}

.channel-header .lang-picker {
    margin-left: auto;
}

#btn-disconnect {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.75rem;
    padding: 6px 14px;
}

#btn-disconnect:hover {
    border-color: var(--error);
    color: var(--error);
}

/* --- Messages --- */

#messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

#messages::-webkit-scrollbar { width: 6px; }
#messages::-webkit-scrollbar-track { background: transparent; }
#messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

.message {
    max-width: 85%;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.message.sent {
    align-self: flex-end;
    align-items: flex-end;
}

.message.received {
    align-self: flex-start;
    align-items: flex-start;
}

.message-meta {
    font-size: 0.65rem;
    color: var(--text-muted);
    padding: 0 4px;
}

.message-body {
    background: var(--sent-bg);
    border: 1px solid var(--sent-border);
    border-radius: var(--radius);
    padding: 10px 14px;
    font-family: var(--mono);
    font-size: 0.75rem;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-word;
    max-width: 100%;
    overflow-x: auto;
}

.message.received .message-body {
    background: var(--received-bg);
    border-color: var(--received-border);
}

.btn-copy {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.65rem;
    padding: 3px 10px;
    border-radius: 4px;
    margin-top: 2px;
}

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

.btn-unsend {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.65rem;
    padding: 3px 10px;
    border-radius: 4px;
    margin-top: 2px;
    opacity: 0;
    transition: opacity 0.15s;
    pointer-events: none;
}

.message.sent:hover .btn-unsend,
.message.sent:focus-within .btn-unsend {
    opacity: 1;
    pointer-events: auto;
}

.btn-unsend:hover {
    border-color: var(--error);
    color: var(--error);
}

.message-unsent {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-style: italic;
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    padding: 8px 14px;
}

.system-message {
    align-self: center;
    font-size: 0.7rem;
    color: var(--text-muted);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 4px 14px;
}

.system-message.system-warning {
    color: var(--warning);
    background: rgba(227, 179, 65, 0.08);
    border-color: rgba(227, 179, 65, 0.3);
}

:root.light .system-message.system-warning {
    background: rgba(154, 103, 0, 0.08);
    border-color: rgba(154, 103, 0, 0.3);
}

/* --- Mode badge --- */

.mode-badge {
    font-size: 0.65rem;
    font-family: var(--mono);
    font-weight: 500;
    padding: 2px 8px;
    border-radius: 10px;
    border: 1px solid var(--border);
    color: var(--text-muted);
    background: var(--surface2);
    flex-shrink: 0;
    letter-spacing: 0.02em;
}

.mode-badge.mode-p2p {
    color: var(--success);
    border-color: rgba(63, 185, 80, 0.35);
    background: rgba(63, 185, 80, 0.08);
}

.mode-badge.mode-fallback {
    color: var(--warning);
    border-color: rgba(227, 179, 65, 0.35);
    background: rgba(227, 179, 65, 0.08);
}

/* --- Input area --- */

.input-area {
    border-top: 1px solid var(--border);
    background: var(--surface);
    padding: 12px 16px;
    flex-shrink: 0;
}

.input-card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg);
    display: flex;
    flex-direction: column;
    transition: border-color 0.15s, outline 0.15s;
}

.input-card:focus-within {
    border-color: var(--accent);
    outline: 2px solid var(--accent);
    outline-offset: 1px;
}

#message-input {
    flex: 1;
    background: transparent;
    border: none;
    border-radius: var(--radius) var(--radius) 0 0;
    color: var(--text);
    font-family: var(--mono);
    font-size: 0.75rem;
    line-height: 1.6;
    padding: 10px 14px;
    resize: none;
    min-height: 52px;
    max-height: 200px;
    overflow-y: auto;
    outline: none;
}

#message-input::placeholder {
    color: var(--text-muted);
    font-family: var(--sans);
    font-size: 0.75rem;
}

.input-toolbar {
    display: flex;
    align-items: stretch;
    gap: 6px;
    padding: 6px 8px;
    border-top: 1px solid var(--border);
}

.expiry-label {
    display: flex;
    align-items: center;
    font-size: 0.7rem;
    color: var(--text-muted);
    white-space: nowrap;
    padding: 0 2px;
}

#btn-send {
    background: var(--accent);
    color: #ffffff;
    padding: 7px 18px;
    flex-shrink: 0;
}

#btn-send:hover:not(:disabled) {
    opacity: 0.88;
}

/* --- Theme toggle --- */

.btn-theme {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.75rem;
    padding: 6px 12px;
    border-radius: var(--radius);
    line-height: 1;
}

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

/* --- Help button --- */

.btn-help {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 6px 8px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

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

/* --- Help modal --- */

.help-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.help-overlay.hidden {
    display: none;
}

.help-modal {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    width: 100%;
    max-width: 600px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.help-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.help-modal-header h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
}

.btn-help-close {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.3rem;
    padding: 4px 8px;
    line-height: 1;
    border-radius: 4px;
}

.btn-help-close:hover {
    color: var(--text);
    background: var(--surface2);
}

.help-modal-body {
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.help-modal-body section h3 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 8px;
}

.help-modal-body section p {
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.7;
    white-space: pre-line;
}

.help-modal-body section a {
    color: var(--accent);
    text-decoration: none;
}

.help-modal-body section a:hover {
    text-decoration: underline;
}

/* --- Language picker --- */

.lang-picker {
    position: relative;
}

.btn-lang-globe {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 6px 8px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.btn-lang-globe:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.lang-menu {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
    z-index: 200;
    overflow: hidden;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
}

.lang-menu[hidden] {
    display: none;
}

.lang-option {
    background: transparent;
    border: none;
    color: var(--text);
    font-size: 0.8rem;
    padding: 7px 10px;
    text-align: left;
    border-radius: 0;
    font-weight: 400;
    width: 100%;
    display: flex;
    align-items: center;
    gap: 7px;
}

.lang-flag {
    width: 20px;
    height: 15px;
    object-fit: cover;
    border-radius: 2px;
    flex-shrink: 0;
}

.lang-option:hover {
    background: var(--surface2);
    color: var(--text);
}

.lang-option.active {
    color: var(--accent);
}

/* --- File sharing --- */

.btn-attach {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 6px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-left: auto;
}

.btn-attach:hover:not(:disabled) {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-mask {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 6px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.btn-mask:hover:not(:disabled) {
    border-color: var(--accent);
    color: var(--accent);
}

.masked-badge {
    display: inline-flex;
    align-items: center;
    margin-left: 5px;
    opacity: 0.5;
    vertical-align: middle;
}

.btn-mask .icon-eye-off { display: none; }
.btn-mask.active .icon-eye { display: none; }
.btn-mask.active .icon-eye-off { display: block; }

.btn-mask.active {
    border-color: var(--accent);
    color: var(--accent);
    background: color-mix(in srgb, var(--accent) 12%, transparent);
}

.file-message {
    border: 1px solid var(--sent-border);
    border-radius: var(--radius);
    padding: 12px 16px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 220px;
    max-width: 100%;
    background: var(--sent-bg);
}

.message.received .file-message {
    background: var(--received-bg);
    border-color: var(--received-border);
}

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

.file-message-icon {
    color: var(--accent);
    flex-shrink: 0;
}

.file-message-name {
    font-family: var(--mono);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text);
    word-break: break-all;
}

.file-message-size {
    font-size: 0.65rem;
    font-family: var(--mono);
    color: var(--text-muted);
    padding-left: 30px;
}

.file-progress {
    width: 100%;
    height: 4px;
    background: var(--surface2);
    border-radius: 2px;
    overflow: hidden;
    margin-top: 4px;
}

.file-progress-bar {
    height: 100%;
    background: var(--accent);
    border-radius: 2px;
    transition: width 0.15s ease;
    width: 0%;
}

.file-progress-text {
    font-size: 0.6rem;
    color: var(--text-muted);
    font-family: var(--mono);
}

.btn-download {
    background: var(--accent);
    color: #ffffff;
    font-size: 0.7rem;
    padding: 6px 14px;
    border-radius: 4px;
    margin-top: 4px;
    align-self: flex-start;
}

.btn-download:hover {
    opacity: 0.88;
}

.drop-overlay {
    position: absolute;
    inset: 0;
    background: rgba(88, 166, 255, 0.08);
    border: 2px dashed var(--accent);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    pointer-events: none;
}

.drop-overlay.hidden {
    display: none;
}

.drop-overlay-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--accent);
    font-size: 0.9rem;
    font-weight: 500;
}

/* --- QR code --- */

.qr-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.qr-area.hidden {
    display: none;
}

.qr-area canvas {
    border: 6px solid #ffffff;
    border-radius: 6px;
    display: block;
}

.qr-hint {
    font-size: 0.65rem;
    color: var(--text-muted);
    text-align: center;
}

.btn-copy-link {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.7rem;
    padding: 5px 14px;
    border-radius: 4px;
}

.btn-copy-link:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* --- Expiry timer --- */

.expiry-picker {
    position: relative;
    display: flex;
    flex-shrink: 0;
}

.btn-expiry {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.65rem;
    font-family: var(--mono);
    padding: 5px 10px;
    border-radius: var(--radius);
}

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

.expiry-menu {
    position: absolute;
    bottom: calc(100% + 6px);
    left: 0;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
    z-index: 200;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    min-width: 72px;
}

.expiry-menu[hidden] {
    display: none;
}

.expiry-option {
    background: transparent;
    border: none;
    color: var(--text);
    font-size: 0.8rem;
    font-family: var(--mono);
    padding: 8px 14px;
    text-align: left;
    border-radius: 0;
    font-weight: 400;
    width: 100%;
}

.expiry-option:hover {
    background: var(--surface2);
    color: var(--text);
}

.expiry-option.active {
    color: var(--accent);
}

.expiry-row {
    display: flex;
    align-items: center;
    gap: 6px;
}

.message-expiry {
    font-size: 0.6rem;
    font-family: var(--mono);
    color: var(--text-muted);
    padding: 0 4px;
}

.message-expiry.expiry-warning {
    color: var(--warning);
}

.message-expiry.expiry-urgent {
    color: var(--error);
}

.message-expired {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-style: italic;
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    padding: 8px 14px;
}

/* --- Read receipts --- */

.message-seen {
    color: var(--accent);
}

/* --- Typing indicator --- */

.typing-indicator {
    padding: 2px 20px 4px;
    font-size: 0.7rem;
    color: var(--text-muted);
    font-style: italic;
    flex-shrink: 0;
    background: var(--surface);
}

.typing-indicator.hidden {
    display: none;
}

/* --- Image preview in file messages --- */

.file-message-preview {
    margin-top: 6px;
    max-width: 100%;
}

.file-message-preview img {
    width: 280px;
    height: 280px;
    max-width: 100%;
    object-fit: cover;
    border-radius: 6px;
    display: block;
}

/* --- Reduced motion --- */

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* === Responsive — Tablet (≤ 768px) === */

@media (max-width: 768px) {
    html {
        font-size: 20px;
    }

    .lang-menu {
        grid-template-columns: repeat(3, 1fr);
    }

    .connect-box {
        padding: 24px 24px;
    }

    #messages {
        padding: 16px;
    }

    .input-area {
        padding: 10px 14px;
    }
}

/* === Responsive — Mobile (≤ 480px) === */

@media (max-width: 480px) {
    html {
        font-size: 16px;
    }

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

    /* Scrollable connect screen with room below the toolbar */
    #screen-connect.active {
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding: 56px 16px 16px;
        overflow-y: auto;
    }

    .connect-box {
        padding: 20px 18px;
        gap: 14px;
    }


    /* Prevent iOS auto-zoom on focus (requires font-size ≥ 16px) */
    input[type="password"],
    #message-input {
        font-size: 1rem;
    }

    .channel-header {
        padding: 8px 12px;
        gap: 8px;
    }

    .fingerprint.visible {
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    #messages {
        padding: 12px;
        gap: 12px;
    }

    .message {
        max-width: 94%;
    }

    .input-area {
        padding: 8px 10px;
    }

    #message-input {
        min-height: 44px;
        max-height: 120px;
    }

    /* Minimum 44px touch targets */
    #btn-send {
        min-height: 44px;
    }

    .btn-attach {
        padding: 10px;
        min-height: 44px;
    }

    .btn-mask {
        padding: 10px;
        min-height: 44px;
    }

    .btn-expiry {
        font-size: 0.875rem;
        padding: 10px 8px;
        min-height: 44px;
    }

    .file-message {
        min-width: 0;
    }

    .file-message-preview img {
        width: 100%;
        height: 220px;
    }

    .qr-area canvas {
        max-width: 160px;
    }
}

/* Touch devices: always show unsend button (no hover available) */
@media (hover: none) {
    .btn-unsend {
        opacity: 1;
        pointer-events: auto;
    }
}