/* ============================================================================
   Octave DART Web Upload Client — Dark Theme
   Matches the Blazor Dashboard Fluent Dark CoolBlue palette
   ============================================================================ */

:root {
    --bg-primary: #1a1d23;
    --bg-secondary: #22262e;
    --bg-card: #272b34;
    --bg-input: rgba(255, 255, 255, 0.05);
    --bg-hover: rgba(255, 255, 255, 0.06);
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-input: rgba(255, 255, 255, 0.15);
    --border-focus: rgba(107, 184, 214, 0.5);
    --text-primary: #e0e4ea;
    --text-secondary: rgba(255, 255, 255, 0.6);
    --text-muted: rgba(255, 255, 255, 0.4);
    --accent-blue: #6bb8d6;
    --accent-green: #6bc77a;
    --accent-yellow: #d6b96b;
    --accent-red: #e8917a;
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'Cascadia Code', 'Consolas', 'Courier New', monospace;
}

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

html, body {
    height: 100%;
    font-family: var(--font-family);
    font-size: 14px;
    color: var(--text-primary);
    background: var(--bg-primary);
    line-height: 1.5;
}

/* ── Page Layout ─────────────────────────────────────────── */

.page-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 24px;
    min-height: 100vh;
}

.page-header {
    margin-bottom: 32px;
}

.page-header h1 {
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.page-header .subtitle {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.header-accent {
    width: 40px;
    height: 3px;
    background: var(--accent-blue);
    border-radius: 2px;
    margin-bottom: 16px;
}

/* ── Cards / Sections ────────────────────────────────────── */

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    padding: 24px;
    margin-bottom: 20px;
}

.card-title {
    font-size: 0.82rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--accent-blue);
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-subtle);
}

/* ── Transfer Details Grid ───────────────────────────────── */

.detail-grid {
    display: grid;
    grid-template-columns: 160px 1fr;
    gap: 8px 16px;
    font-size: 0.9rem;
}

.detail-grid .label {
    color: var(--text-secondary);
    font-weight: 500;
}

.detail-grid .value {
    color: var(--text-primary);
    word-break: break-word;
}

.detail-grid .value a {
    color: var(--accent-blue);
    text-decoration: none;
}

.detail-grid .value a:hover {
    text-decoration: underline;
}

/* ── Form Inputs ─────────────────────────────────────────── */

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
    font-weight: 500;
}

.form-input {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border-input);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: var(--font-family);
    transition: border-color 0.15s;
    outline: none;
}

.form-input:focus {
    border-color: var(--border-focus);
}

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

.password-group {
    display: flex;
    align-items: center;
    gap: 12px;
}

.password-group .form-input {
    flex: 1;
}

.password-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    color: var(--text-secondary);
    cursor: pointer;
    white-space: nowrap;
    user-select: none;
}

.password-toggle input[type="checkbox"] {
    accent-color: var(--accent-blue);
}

/* ── UUID Entry (index.html) ─────────────────────────────── */

.uuid-card {
    max-width: 520px;
    margin: 80px auto 0;
    text-align: center;
}

.uuid-card h1 {
    margin-bottom: 8px;
}

.uuid-card .instructions {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 24px;
}

.uuid-input-group {
    display: flex;
    gap: 10px;
    margin-bottom: 16px;
}

.uuid-input-group .form-input {
    flex: 1;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.95rem;
    letter-spacing: 0.02em;
}

.btn-go {
    padding: 10px 28px;
    background: rgba(107, 184, 214, 0.2);
    color: var(--accent-blue);
    border: 1px solid rgba(107, 184, 214, 0.4);
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s;
    white-space: nowrap;
}

.btn-go:hover:not(:disabled) {
    background: rgba(107, 184, 214, 0.3);
}

.btn-go:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.uuid-hint {
    font-size: 0.82rem;
    color: var(--text-muted);
}

/* ── Drop Zone ───────────────────────────────────────────── */

.drop-zone {
    border: 2px dashed rgba(107, 184, 214, 0.3);
    border-radius: 8px;
    padding: 48px 24px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    margin-bottom: 8px;
}

.drop-zone:hover {
    border-color: rgba(107, 184, 214, 0.5);
    background: rgba(107, 184, 214, 0.04);
}

.drop-zone.drag-over {
    border-color: var(--accent-blue);
    background: rgba(107, 184, 214, 0.08);
}

.drop-zone.has-file {
    border-color: rgba(107, 195, 122, 0.4);
    background: rgba(107, 195, 122, 0.04);
    padding: 20px 24px;
}

.drop-zone-text {
    color: var(--accent-blue);
    font-size: 0.95rem;
}

.drop-zone-text .browse-link {
    text-decoration: underline;
    cursor: pointer;
}

.file-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-size: 0.9rem;
}

.file-info .file-name {
    font-weight: 500;
    color: var(--text-primary);
    word-break: break-all;
}

.file-info .file-size {
    color: var(--text-secondary);
    white-space: nowrap;
}

.file-info .file-remove {
    color: var(--accent-red);
    cursor: pointer;
    font-size: 0.82rem;
    opacity: 0.7;
    transition: opacity 0.15s;
}

.file-info .file-remove:hover {
    opacity: 1;
}

/* ── Upload Button ───────────────────────────────────────── */

.btn-upload {
    display: block;
    width: 100%;
    padding: 12px 24px;
    background: rgba(107, 184, 214, 0.2);
    color: var(--accent-blue);
    border: 1px solid rgba(107, 184, 214, 0.4);
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s;
    margin-top: 16px;
}

.btn-upload:hover:not(:disabled) {
    background: rgba(107, 184, 214, 0.3);
}

.btn-upload:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* ── Progress Section ────────────────────────────────────── */

.progress-section {
    display: none;
}

.progress-section.visible {
    display: block;
}

.progress-bar-container {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 12px;
}

.progress-bar {
    height: 100%;
    background: var(--accent-blue);
    border-radius: 4px;
    transition: width 0.3s ease;
    width: 0%;
}

.progress-bar.complete {
    background: var(--accent-green);
}

.progress-percent {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--accent-blue);
    margin-bottom: 12px;
}

.progress-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px 24px;
    font-size: 0.85rem;
    margin-bottom: 16px;
}

.progress-stats .stat-label {
    color: var(--text-secondary);
}

.progress-stats .stat-value {
    color: var(--text-primary);
    font-weight: 500;
}

.hash-progress {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border-subtle);
}

.hash-progress-bar-container {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 2px;
    overflow: hidden;
    margin-top: 6px;
}

.hash-progress-bar {
    height: 100%;
    background: var(--accent-yellow);
    border-radius: 2px;
    transition: width 0.3s ease;
    width: 0%;
}

.hash-progress-bar.complete {
    background: var(--accent-green);
}

.hash-status {
    font-size: 0.82rem;
    color: var(--text-secondary);
}

/* ── Buttons (Cancel, Retry) ─────────────────────────────── */

.btn-cancel {
    padding: 8px 24px;
    background: rgba(232, 145, 122, 0.15);
    color: var(--accent-red);
    border: 1px solid rgba(232, 145, 122, 0.3);
    border-radius: 6px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background 0.15s;
}

.btn-cancel:hover:not(:disabled) {
    background: rgba(232, 145, 122, 0.25);
}

.btn-cancel:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-retry {
    padding: 8px 24px;
    background: rgba(214, 185, 107, 0.15);
    color: var(--accent-yellow);
    border: 1px solid rgba(214, 185, 107, 0.3);
    border-radius: 6px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background 0.15s;
}

.btn-retry:hover {
    background: rgba(214, 185, 107, 0.25);
}

/* ── Resume Banner ───────────────────────────────────────── */

.resume-banner {
    display: none;
    padding: 14px 18px;
    background: rgba(107, 184, 214, 0.08);
    border: 1px solid rgba(107, 184, 214, 0.2);
    border-radius: 6px;
    margin-bottom: 16px;
}

.resume-banner.visible {
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.resume-banner .resume-icon {
    font-size: 1.2rem;
    line-height: 1;
}

.resume-banner .resume-text {
    flex: 1;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.resume-banner .resume-text strong {
    color: var(--text-primary);
}

.resume-banner .resume-filename {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--accent-blue);
    margin-top: 4px;
}

.btn-start-over {
    padding: 6px 16px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    border: 1px solid var(--border-input);
    border-radius: 4px;
    font-size: 0.82rem;
    cursor: pointer;
    transition: background 0.15s;
    white-space: nowrap;
}

.btn-start-over:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* ── Status Messages ─────────────────────────────────────── */

.status-message {
    display: none;
    padding: 12px 18px;
    border-radius: 6px;
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.status-message.visible {
    display: block;
}

.status-message.success {
    background: rgba(107, 195, 122, 0.1);
    border: 1px solid rgba(107, 195, 122, 0.25);
    color: var(--accent-green);
}

.status-message.error {
    background: rgba(232, 145, 122, 0.1);
    border: 1px solid rgba(232, 145, 122, 0.25);
    color: var(--accent-red);
}

.status-message.info {
    background: rgba(107, 184, 214, 0.08);
    border: 1px solid rgba(107, 184, 214, 0.2);
    color: var(--accent-blue);
}

.status-message.warning {
    background: rgba(214, 185, 107, 0.08);
    border: 1px solid rgba(214, 185, 107, 0.2);
    color: var(--accent-yellow);
}

/* ── Browser Tip ─────────────────────────────────────────── */

.browser-tip {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    padding: 12px 14px;
    background: rgba(107, 184, 214, 0.06);
    border: 1px solid rgba(107, 184, 214, 0.18);
    border-radius: 6px;
    margin-bottom: 16px;
    font-size: 0.82rem;
    color: var(--accent-blue);
    line-height: 1.55;
}

.browser-tip-icon {
    font-size: 1rem;
    line-height: 1;
    flex-shrink: 0;
    margin-top: 1px;
}

/* ── Completion State ────────────────────────────────────── */

.completion-card {
    text-align: center;
    padding: 40px 24px;
}

.completion-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.completion-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--accent-green);
    margin-bottom: 8px;
}

.completion-subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ── Footer ──────────────────────────────────────────────── */

.page-footer {
    margin-top: 32px;
    padding-top: 20px;
    border-top: 1px solid var(--border-subtle);
    font-size: 0.82rem;
    color: var(--text-muted);
}

.page-footer a {
    color: var(--accent-blue);
    text-decoration: none;
}

.page-footer a:hover {
    text-decoration: underline;
}

.footer-warning {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    padding: 12px 14px;
    background: rgba(214, 185, 107, 0.06);
    border: 1px solid rgba(214, 185, 107, 0.15);
    border-radius: 6px;
    margin-bottom: 16px;
    font-size: 0.82rem;
    color: var(--accent-yellow);
}

.footer-warning .warning-icon {
    font-size: 1.1rem;
    line-height: 1;
}

/* ── Tab Visibility Warning Banner ───────────────────────── */

.tab-warning-banner {
    display: none;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    background: rgba(214, 185, 107, 0.08);
    border-bottom: 1px solid rgba(214, 185, 107, 0.2);
    border-radius: 8px 8px 0 0;
    font-size: 0.85rem;
    color: var(--accent-yellow);
    line-height: 1.4;
    margin-bottom: 0;
}

.tab-warning-banner.visible {
    display: flex;
}

.tab-warning-banner strong {
    font-weight: 600;
}

.tab-warning-icon {
    flex-shrink: 0;
    font-size: 1rem;
    line-height: 1;
}

.tab-warning-dismiss {
    margin-left: auto;
    background: none;
    border: none;
    padding: 4px 6px;
    cursor: pointer;
    color: var(--accent-yellow);
    font-size: 18px;
    line-height: 1;
    flex-shrink: 0;
    opacity: 0.7;
}

.tab-warning-dismiss:hover {
    opacity: 1;
}

.transfer-id-display {
    margin-top: 12px;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--text-secondary);
    user-select: all;
}

/* ── Loading Spinner ─────────────────────────────────────── */

.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 40px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-subtle);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ── Hidden utility ──────────────────────────────────────── */

.hidden {
    display: none !important;
}

/* ── Theme Toggle Button ──────────────────────────────────── */

.theme-toggle {
    position: fixed;
    top: 12px;
    right: 12px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border-subtle);
    background: var(--bg-card);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    transition: background 0.15s, border-color 0.15s;
    padding: 0;
    line-height: 1;
}

    .theme-toggle:hover {
        border-color: var(--accent-blue);
        background: var(--bg-hover);
    }

/* Sun icon: visible in dark mode (default) */
.theme-icon-sun {
    font-size: 18px;
    display: inline;
    color: #f0c040;
}

/* Moon icon: hidden in dark mode */
.theme-icon-moon {
    font-size: 16px;
    display: none;
}

/* In light mode: hide sun, show moon */
[data-theme="light"] .theme-icon-sun {
    display: none;
}

[data-theme="light"] .theme-icon-moon {
    display: inline;
}

/* ── Index Page — Download Link ──────────────────────────── */

.index-download-link {
    text-align: center;
    margin-top: 20px;
    font-size: 0.82rem;
    color: var(--text-muted);
}

.index-download-link a {
    color: var(--accent-blue);
    text-decoration: none;
}

.index-download-link a:hover {
    text-decoration: underline;
}

/* ── Download Page ───────────────────────────────────────── */

/* Download page needs more width for two cards with SHA-256 hashes */
.page-container.download-page {
    max-width: 1040px;
}

.download-header {
    text-align: center;
    margin-bottom: 32px;
}

.download-header .header-accent {
    margin: 0 auto 16px;
}

.download-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.download-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.download-version-badge {
    text-align: center;
    margin-bottom: 28px;
    font-size: 0.88rem;
    color: var(--accent-blue);
    font-weight: 600;
}

.download-version-date {
    color: var(--text-muted);
    font-weight: 400;
    margin-left: 8px;
    font-size: 0.82rem;
}

/* Platform cards layout */
.download-platforms {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 32px;
}

@media (max-width: 640px) {
    .download-platforms {
        grid-template-columns: 1fr;
    }
}

.download-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    padding: 24px;
    transition: border-color 0.2s;
}

.download-card-highlighted {
    border-color: rgba(107, 184, 214, 0.4);
    box-shadow: 0 0 0 1px rgba(107, 184, 214, 0.15);
}

.download-card-header {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 20px;
}

.download-platform-icon {
    font-size: 1.5rem;
    line-height: 1;
    flex-shrink: 0;
    margin-top: 2px;
}

.download-platform-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 3px;
}

.download-platform-desc {
    font-size: 0.82rem;
    color: var(--text-muted);
}

/* Download button */
.download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 12px 20px;
    background: rgba(107, 184, 214, 0.15);
    color: var(--accent-blue);
    border: 1px solid rgba(107, 184, 214, 0.3);
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: background 0.15s;
    margin-bottom: 16px;
}

.download-btn:hover {
    background: rgba(107, 184, 214, 0.25);
    text-decoration: none;
}

.download-btn-icon {
    font-size: 1rem;
}

/* SHA-256 hash display */
.download-hash {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.download-hash-label {
    font-size: 0.78rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    white-space: nowrap;
}

.download-hash-value {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-secondary);
    word-break: break-all;
    flex: 1;
    min-width: 0;
    background: rgba(255, 255, 255, 0.04);
    padding: 4px 8px;
    border-radius: 3px;
    border: 1px solid var(--border-subtle);
}

.download-copy-btn {
    padding: 3px 10px;
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-secondary);
    border: 1px solid var(--border-input);
    border-radius: 3px;
    font-size: 0.75rem;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    white-space: nowrap;
}

.download-copy-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.download-copy-btn.copied {
    background: rgba(107, 195, 122, 0.15);
    color: var(--accent-green);
    border-color: rgba(107, 195, 122, 0.3);
}

/* Linux instructions block */
.download-instructions {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-subtle);
}

.download-instructions-title {
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.download-code-block {
    position: relative;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-subtle);
    border-radius: 6px;
    padding: 14px 16px;
    overflow-x: auto;
}

.download-code-block pre {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    line-height: 1.6;
    color: var(--text-primary);
    white-space: pre;
}

.download-code-block code {
    font-family: inherit;
}

.download-copy-code {
    position: absolute;
    top: 8px;
    right: 8px;
}

/* Unavailable state */
.download-unavailable {
    font-size: 0.85rem;
    color: var(--text-muted);
    padding: 16px 0;
    text-align: center;
    font-style: italic;
}

/* Footer */
.download-footer {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-subtle);
    font-size: 0.88rem;
}

.download-footer a {
    color: var(--accent-blue);
    text-decoration: none;
}

.download-footer a:hover {
    text-decoration: underline;
}