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

:root{
    --primary:#6366f1;
    --primary-dark:#4f46e5;
    --accent:#8b5cf6;
    --success:#22c55e;
    --error:#ef4444;
    --warning:#f59e0b;
    --bg:#0f172a;
    --surface:#1e293b;
    --surface-2:#334155;
    --text:#f1f5f9;
    --text-muted:#94a3b8;
    --border:#475569;
    --radius:12px;
    --radius-sm:8px;
}

body{
    font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,Ubuntu,sans-serif;
    background:var(--bg);
    min-height:100vh;
    padding:20px;
    color:var(--text);
    line-height:1.6;
}

.container{
    max-width:720px;
    margin:0 auto;
    padding:20px 0;
}

header{text-align:center;margin-bottom:32px}
header h1{font-size:2.2em;margin-bottom:6px}
.subtitle{color:var(--text-muted);font-size:1.05em}

/* Flash Messages */
.flash-messages{margin-bottom:20px}
.flash{
    padding:12px 16px;
    border-radius:var(--radius-sm);
    margin-bottom:10px;
    font-size:14px;
}
.flash-warning{background:rgba(245,158,11,.15);border:1px solid var(--warning);color:var(--warning)}

/* Upload Form */
.upload-form{
    background:var(--surface);
    padding:32px;
    border-radius:var(--radius);
    border:1px solid var(--border);
    margin-bottom:24px;
}
.upload-form h2{margin-bottom:24px;font-size:1.3em}

.form-group{margin-bottom:20px}
.form-group label{display:block;margin-bottom:8px;font-weight:600;font-size:14px}
.optional{font-weight:400;color:var(--text-muted);font-size:12px}

.form-group input[type="text"],
.form-group textarea{
    width:100%;
    padding:12px;
    border:1px solid var(--border);
    border-radius:var(--radius-sm);
    font-size:14px;
    background:var(--surface-2);
    color:var(--text);
    transition:border-color .2s;
}
.form-group input:focus,
.form-group textarea:focus{outline:none;border-color:var(--primary)}
.form-group textarea{font-family:'SF Mono',Monaco,Menlo,monospace;resize:vertical;min-height:180px}
.form-group input::placeholder,
.form-group textarea::placeholder{color:var(--text-muted);opacity:.6}

.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:540px){.form-row{grid-template-columns:1fr}}

.help-row{display:flex;justify-content:space-between;margin-top:6px;flex-wrap:wrap;gap:4px}
.help-text{font-size:12px;color:var(--text-muted)}
.help-text code{background:var(--surface-2);padding:2px 6px;border-radius:4px;font-size:11px}

/* Drop Zone */
.drop-zone{
    border:2px dashed var(--border);
    border-radius:var(--radius);
    padding:40px 20px;
    text-align:center;
    cursor:pointer;
    transition:all .2s;
    margin-bottom:12px;
}
.drop-zone:hover,.drop-zone.drag-over{
    border-color:var(--primary);
    background:rgba(99,102,241,.08);
}
.drop-icon{width:48px;height:48px;color:var(--text-muted);margin-bottom:12px}
.drop-text{font-size:16px;font-weight:600;margin-bottom:4px}
.drop-subtext{font-size:13px;color:var(--text-muted)}

.drop-zone-selected{
    display:flex;
    align-items:center;
    gap:12px;
    justify-content:center;
}
.file-icon{width:32px;height:32px;color:var(--primary);flex-shrink:0}
#selectedFileName{font-weight:600;font-size:15px;word-break:break-all}
.btn-clear{
    background:none;border:none;color:var(--text-muted);font-size:24px;
    cursor:pointer;padding:0 4px;line-height:1;flex-shrink:0;
}
.btn-clear:hover{color:var(--error)}

/* Upload Progress */
.upload-progress{margin-bottom:20px}
.progress-header{display:flex;justify-content:space-between;margin-bottom:6px;font-size:13px}
.progress-track{background:var(--surface-2);border-radius:20px;height:8px;overflow:hidden}
.progress-fill{
    background:linear-gradient(90deg,var(--primary),var(--accent));
    height:100%;transition:width .3s;border-radius:20px;
}

/* Buttons */
.btn-primary{
    background:linear-gradient(135deg,var(--primary),var(--accent));
    color:white;border:none;padding:14px 28px;font-size:16px;font-weight:600;
    border-radius:var(--radius-sm);cursor:pointer;width:100%;
    transition:transform .15s,box-shadow .15s,opacity .15s;
    display:flex;align-items:center;justify-content:center;gap:8px;
}
.btn-primary:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 4px 20px rgba(99,102,241,.35)}
.btn-primary:active:not(:disabled){transform:translateY(0)}
.btn-primary:disabled{opacity:.7;cursor:not-allowed}

.btn-spinner{display:inline-flex;align-items:center;gap:8px}
.spinner{width:18px;height:18px;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* Jobs List */
.jobs-list{margin-top:24px}
.jobs-list h2{font-size:1.2em;margin-bottom:12px;color:var(--text-muted)}
.job-item{
    display:flex;align-items:center;justify-content:space-between;
    padding:14px 16px;background:var(--surface);border-radius:var(--radius-sm);
    margin-bottom:8px;text-decoration:none;color:var(--text);
    border:1px solid transparent;transition:border-color .15s,background .15s;
}
.job-item:hover{border-color:var(--border);background:var(--surface-2)}
.job-item-left{display:flex;flex-direction:column;gap:2px}
.job-filename{font-weight:600;font-size:14px}
.job-tracks{font-size:12px;color:var(--text-muted)}
.job-status-badge{
    font-size:11px;font-weight:600;padding:4px 10px;border-radius:20px;text-transform:uppercase;letter-spacing:.5px;
}
.job-status-badge.pending{background:rgba(148,163,184,.2);color:var(--text-muted)}
.job-status-badge.processing{background:rgba(99,102,241,.2);color:var(--primary)}
.job-status-badge.completed{background:rgba(34,197,94,.15);color:var(--success)}
.job-status-badge.error{background:rgba(239,68,68,.15);color:var(--error)}

/* Job Details */
.job-details{
    background:var(--surface);padding:32px;border-radius:var(--radius);
    border:1px solid var(--border);
}
.job-header{margin-bottom:24px}
.job-header h2{font-size:1.2em;margin-bottom:8px;word-break:break-all}
.job-meta{display:flex;flex-wrap:wrap;gap:8px}
.meta-tag{
    font-size:12px;padding:4px 10px;background:var(--surface-2);
    border-radius:20px;color:var(--text-muted);
}

/* Large Progress */
.progress-track-large{background:var(--surface-2);border-radius:12px;height:12px;overflow:hidden;margin-bottom:12px}
.progress-info{display:flex;justify-content:space-between;margin-bottom:24px;font-size:13px}
.status-text{color:var(--text-muted)}
.status-pct{font-weight:600;color:var(--primary)}

/* Download Section */
.download-section{
    background:rgba(34,197,94,.08);border:1px solid rgba(34,197,94,.25);
    border-radius:var(--radius);padding:20px;margin-bottom:20px;
}
.download-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;flex-wrap:wrap;gap:12px}
.download-header h3{color:var(--success);font-size:1.1em}

.btn-zip{
    display:inline-flex;align-items:center;gap:6px;
    background:var(--success);color:white;text-decoration:none;
    padding:10px 18px;border-radius:var(--radius-sm);font-weight:600;font-size:14px;
    transition:background .15s;
}
.btn-zip:hover{background:#16a34a}

.file-list{display:flex;flex-direction:column;gap:6px}
.file-item{
    display:flex;align-items:center;gap:10px;
    padding:10px 14px;background:rgba(255,255,255,.05);
    border-radius:var(--radius-sm);text-decoration:none;color:var(--text);
    transition:background .15s;
}
.file-item:hover{background:rgba(255,255,255,.1)}
.file-name{flex:1;font-size:13px;font-family:'SF Mono',Monaco,monospace;word-break:break-all}
.download-arrow{color:var(--text-muted);flex-shrink:0}

/* Error */
.error-message{
    display:flex;align-items:flex-start;gap:10px;
    background:rgba(239,68,68,.1);border:1px solid rgba(239,68,68,.3);
    border-radius:var(--radius-sm);padding:16px;margin-bottom:20px;
    color:var(--error);font-size:14px;
}
.error-message svg{flex-shrink:0;margin-top:2px}

/* Actions */
.job-actions{margin-top:16px}
.btn-back{
    display:inline-flex;align-items:center;gap:6px;
    background:var(--surface-2);color:var(--text-muted);text-decoration:none;
    padding:10px 18px;border-radius:var(--radius-sm);font-size:14px;
    transition:background .15s,color .15s;border:1px solid var(--border);
}
.btn-back:hover{background:var(--border);color:var(--text)}