/* CSS Variables - Project Design System */
:root {
    --bg-dark: #0a0e27;
    --bg-darker: #050814;
    --bg-card: #131829;
    --primary: #a78bfa;
    --primary-bright: #c4b5fd;
    --accent: #06b6d4;
    --accent-bright: #22d3ee;
    --text: #e2e8f0;
    --text-dim: #94a3b8;
    --text-dimmer: #64748b;
    --border: #1e293b;
    --border-bright: #334155;
    --success: #10b981;
    --danger: #ef4444;
}

/* Base Styles */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text);
    min-height: 100vh;
}

/* Header */
.header {
    background-color: var(--bg-darker);
    border-bottom: 1px solid var(--border-bright);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content h1 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
}

.home-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 700;
    transition: color 0.2s ease;
}

.home-link:hover {
    color: var(--primary-bright);
}

/* Container */
.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 3rem 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Upload Area */
.upload-area {
    background-color: var(--bg-card);
    border: 2px dashed var(--border-bright);
    border-radius: 8px;
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.upload-area svg {
    color: var(--primary);
    opacity: 0.7;
}

.upload-area h2 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text);
}

.upload-area .text-dim {
    margin: 0;
    color: var(--text-dim);
    font-size: 0.875rem;
}

.upload-area:hover,
.upload-area.drag-over {
    border-color: var(--primary);
    background-color: rgba(167, 139, 250, 0.05);
}

.upload-area:hover svg {
    opacity: 1;
    transform: translateY(-4px);
}

/* File Info Card */
.file-info {
    background-color: var(--bg-card);
    border: 1px solid var(--border-bright);
    border-radius: 8px;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.file-details {
    flex: 1;
}

.file-name {
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.25rem;
}

.file-size {
    font-size: 0.875rem;
    color: var(--text-dim);
}

.btn-remove {
    background-color: transparent;
    border: 1px solid var(--danger);
    color: var(--danger);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.875rem;
    transition: all 0.2s ease;
}

.btn-remove:hover {
    background-color: var(--danger);
    color: white;
}

/* Progress Card */
.progress-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-bright);
    border-radius: 8px;
    padding: 1.5rem;
}

.progress-text {
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.5rem;
}

.progress-bar-container {
    background-color: var(--bg-darker);
    border-radius: 4px;
    height: 8px;
    overflow: hidden;
    margin: 1rem 0;
}

.progress-bar {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    height: 100%;
    transition: width 0.3s ease;
    border-radius: 4px;
}

.progress-percent {
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-dim);
    font-weight: 600;
}

/* Action Buttons */
.actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.btn-primary,
.btn-secondary {
    border: none;
    padding: 0.75rem 2rem;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: var(--bg-dark);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(167, 139, 250, 0.4);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background-color: var(--bg-card);
    color: var(--text);
    border: 1px solid var(--border-bright);
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 2rem 1rem;
    }

    .header {
        padding: 0.75rem 1rem;
    }

    .header-content h1 {
        font-size: 1.25rem;
    }

    .upload-area {
        padding: 2rem 1rem;
    }

    .upload-area h2 {
        font-size: 1.125rem;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-darker);
}

::-webkit-scrollbar-thumb {
    background: var(--border-bright);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}