/* Global Styles */
:root {
    --primary-color: #3b82f6;
    /* Apple Blue-ish */
    --primary-hover: #2563eb;
    --success-color: #10b981;
    --error-color: #ef4444;
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --surface-bg: #334155;
    --text-color: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: #475569;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    line-height: 1.6;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 3rem;
}

h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, #60a5fa, #34d399);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tagline {
    font-size: 1.1rem;
    color: var(--text-muted);
}

/* Tool Area */
.tool-card {
    background-color: var(--card-bg);
    border-radius: 1.5rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    padding: 2rem;
    border: 1px solid var(--border-color);
}

/* Drop Zone */
.drop-zone {
    border: 3px dashed var(--border-color);
    border-radius: 1rem;
    padding: 3rem 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    background-color: rgba(255, 255, 255, 0.02);
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: var(--primary-color);
    background-color: rgba(59, 130, 246, 0.1);
}

.drop-icon {
    font-size: 3rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
    display: block;
}

.drop-text {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.drop-subtext {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.file-input {
    display: none;
}

/* Controls */
.controls-area {
    margin-top: 2rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.hidden {
    display: none !important;
}

.options {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.format-select {
    background-color: var(--surface-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-size: 1rem;
    cursor: pointer;
}

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
}

.btn-primary:disabled {
    background-color: var(--surface-bg);
    color: var(--text-muted);
    cursor: not-allowed;
}

.btn-success {
    background-color: var(--success-color);
    color: white;
}

/* File List */
.file-list {
    margin-top: 2rem;
    display: grid;
    gap: 1rem;
}

.file-item {
    background-color: var(--surface-bg);
    padding: 1rem;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: opacity 0.3s;
}

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

.file-name {
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: block;
}

.file-status {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.status-badge {
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.status-pending {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-muted);
}

.status-converting {
    background-color: rgba(59, 130, 246, 0.2);
    color: var(--primary-color);
}

.status-done {
    background-color: rgba(16, 185, 129, 0.2);
    color: var(--success-color);
}

.status-error {
    background-color: rgba(239, 68, 68, 0.2);
    color: var(--error-color);
}

.progress-ring {
    width: 24px;
    height: 24px;
}

/* Privacy & Info Sections */
.info-section {
    margin-top: 4rem;
    display: grid;
    gap: 2rem;
    grid-template-columns: 1fr;
}

@media (min-width: 768px) {
    .info-section {
        grid-template-columns: 1fr 1fr;
    }

    .full-width {
        grid-column: span 2;
    }
}

.info-card {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
}

.info-card h2,
.info-card h3 {
    margin-top: 0;
    color: var(--text-color);
    border-bottom: 2px solid var(--primary-color);
    display: inline-block;
    padding-bottom: 0.5rem;
    margin-bottom: 1rem;
}

.info-card p,
.info-card li {
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.faq-list details {
    background-color: var(--surface-bg);
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    cursor: pointer;
}

.faq-list summary {
    font-weight: 600;
    color: var(--text-color);
}

.faq-list p {
    margin-top: 1rem;
    margin-bottom: 0;
}

.back-link {
    display: inline-flex;
    align-items: center;
    color: var(--text-muted);
    text-decoration: none;
    margin-bottom: 1rem;
    transition: color 0.2s;
}

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