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

:root {
    --blue:        #1a73e8;
    --blue-hover:  #1557b0;
    --green:       #0f9d58;
    --green-hover: #0b8043;
    --red:         #d93025;
    --bg:          #f8f9fa;
    --border:      #dadce0;
    --muted:       #5f6368;
    --soft:        #9aa0a6;
    --text:        #202124;
}

body {
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    font-size: 14px;
}

/* шапка */
header {
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 13px 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.logo {
    font-size: 19px;
    font-weight: 500;
    letter-spacing: -0.3px;
    line-height: 1;
}

.logo .n   { color: #4285f4; }
.logo .o   { color: #ea4335; }
.logo .d   { color: #fbbc04; }
.logo .e   { color: #4285f4; }
.logo .x   { color: #34a853; }
.logo .dot { color: #ea4335; }
.logo .pw  { color: #34a853; }
.logo .sep { color: var(--border); margin: 0 6px; font-weight: 300; }
.logo .name { color: var(--muted); font-weight: 400; font-size: 16px; }

.ffmpeg-warn {
    font-size: 12px;
    color: #7a5c00;
    background: #fef9c3;
    padding: 6px 12px;
    border-radius: 4px;
    border: 1px solid #f5c400;
    display: flex;
    align-items: center;
    gap: 4px;
    flex-wrap: wrap;
}

.link-btn {
    background: none;
    border: none;
    color: var(--blue);
    cursor: pointer;
    font-size: inherit;
    padding: 0;
    text-decoration: underline;
    font-family: inherit;
}

.link-btn:disabled {
    color: var(--muted);
    cursor: default;
    text-decoration: none;
}

code {
    font-family: 'Roboto Mono', 'Consolas', monospace;
    font-size: 11px;
    background: #f1f3f4;
    padding: 2px 5px;
    border-radius: 3px;
    color: var(--text);
}

/* основная область */
main {
    max-width: 860px;
    margin: 40px auto;
    padding: 0 16px 60px;
}

/* зона загрузки */
.dropzone {
    background: #fff;
    border: 2px dashed var(--border);
    border-radius: 12px;
    padding: 56px 40px 48px;
    text-align: center;
    cursor: pointer;
    transition: border-color .18s, background .18s;
    user-select: none;
}

.dropzone:hover,
.dropzone.drag-over {
    border-color: var(--blue);
    background: #f0f6ff;
}

.dropzone.drag-over .drop-icon {
    color: var(--blue);
    transform: translateY(-4px);
}

.drop-icon {
    color: #c9cdd0;
    margin-bottom: 14px;
    transition: color .18s, transform .18s;
    display: inline-block;
}

.drop-title {
    font-size: 17px;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 8px;
}

.drop-sub {
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 14px;
}

.file-label {
    color: var(--blue);
    cursor: pointer;
    text-decoration: underline;
}

.drop-formats {
    font-size: 11px;
    color: var(--soft);
    letter-spacing: .2px;
}

/* список файлов */
.file-list {
    margin-top: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* карточка файла */
.file-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px 18px;
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
    transition: box-shadow .15s;
}

.file-card:hover {
    box-shadow: 0 1px 6px rgba(0,0,0,.08);
}

.file-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.file-icon.image   { background: #e8f5e9; }
.file-icon.video   { background: #fce4ec; }
.file-icon.audio   { background: #e3f2fd; }
.file-icon.archive { background: #fff8e1; }
.file-icon.unknown { background: #f3e5f5; }

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

.file-name {
    font-size: 13px;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-meta {
    font-size: 11px;
    color: var(--muted);
    margin-top: 2px;
}

/* действия */
.file-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.format-select {
    height: 34px;
    padding: 0 10px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 12px;
    color: var(--text);
    background: #fff;
    cursor: pointer;
    outline: none;
    font-family: inherit;
    transition: border-color .15s;
}

.format-select:focus {
    border-color: var(--blue);
}

/* кнопки */
.btn {
    height: 34px;
    padding: 0 18px;
    border: none;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    font-family: inherit;
    letter-spacing: .2px;
    transition: background .15s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    white-space: nowrap;
}

.btn-primary {
    background: var(--blue);
    color: #fff;
}

.btn-primary:hover:not(:disabled) {
    background: var(--blue-hover);
}

.btn-primary:disabled {
    background: #e0e0e0;
    color: var(--muted);
    cursor: not-allowed;
}

.btn-download {
    background: var(--green);
    color: #fff;
}

.btn-download:hover {
    background: var(--green-hover);
}

/* статус */
.file-status {
    font-size: 11px;
    color: var(--muted);
    min-width: 80px;
}

.file-status.error {
    color: var(--red);
}

.file-status.success {
    color: var(--green);
}

/* спиннер */
.spinner {
    display: inline-block;
    width: 12px;
    height: 12px;
    border: 2px solid #e0e0e0;
    border-top-color: var(--blue);
    border-radius: 50%;
    animation: spin .65s linear infinite;
    vertical-align: middle;
    margin-right: 4px;
}

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

.hidden { display: none !important; }

/* адаптив */
@media (max-width: 600px) {
    main { margin: 20px auto; }
    .dropzone { padding: 40px 20px; }
    .file-card { flex-direction: column; align-items: flex-start; }
    .file-actions { width: 100%; }
}