/* --- Modern CSS Design System & Variables --- */
:root {
    --bg-dark: #0f111a;
    --card-bg: rgba(22, 28, 45, 0.45);
    --card-border: rgba(255, 255, 255, 0.08);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --primary: #06b6d4; /* cyan-500 */
    --primary-glow: rgba(6, 182, 212, 0.35);
    --secondary: #10b981; /* emerald-500 */
    --secondary-glow: rgba(16, 185, 129, 0.25);
    --error: #ef4444;
    --info: #3b82f6;
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    --border-radius: 16px;
    --transition-speed: 0.3s;
}

/* --- Base Page Reset & Glow Background --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-body);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    padding: 2.5rem 1rem;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.glow-bg {
    position: fixed;
    top: -10%;
    left: -10%;
    width: 60%;
    height: 60%;
    background: radial-gradient(circle, rgba(6, 182, 212, 0.08) 0%, rgba(15, 17, 26, 0) 70%);
    z-index: -1;
    pointer-events: none;
    animation: drift 15s ease-in-out infinite alternate;
}

@keyframes drift {
    0% { transform: translate(0, 0); }
    100% { transform: translate(30%, 20%); }
}

/* --- App Shell & Layout --- */
.app-container {
    width: 100%;
    max-width: 1280px;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.app-header {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-pulse {
    width: 12px;
    height: 12px;
    background-color: var(--primary);
    border-radius: 50%;
    box-shadow: 0 0 12px var(--primary);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.9); opacity: 0.5; }
    50% { transform: scale(1.2); opacity: 1; box-shadow: 0 0 20px var(--primary); }
    100% { transform: scale(0.9); opacity: 0.5; }
}

.logo-area h1 {
    font-family: var(--font-heading);
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: -0.025em;
}

.logo-area h1 span {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 600px;
}

.badge-container {
    display: flex;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.badge {
    padding: 0.35rem 0.75rem;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.badge-primary {
    background: rgba(6, 182, 212, 0.1);
    color: var(--primary);
    border-color: rgba(6, 182, 212, 0.2);
}

.badge-secondary {
    background: rgba(16, 185, 129, 0.1);
    color: var(--secondary);
    border-color: rgba(16, 185, 129, 0.2);
}

/* --- Responsive Layout Grid --- */
.grid-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

@media (max-width: 960px) {
    .grid-layout {
        grid-template-columns: 1fr;
    }
}

.control-panel, .result-panel {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* --- Premium Glassmorphism Card Style --- */
.glass-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: var(--border-radius);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.glass-card:hover {
    box-shadow: 0 12px 40px 0 rgba(6, 182, 212, 0.05);
}

.full-height {
    height: 100%;
}

.card-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 1rem;
}

.icon {
    width: 20px;
    height: 20px;
    color: var(--primary);
}

/* --- File Dropzones & Custom Inputs --- */
.file-uploader {
    border: 2px dashed rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 2.25rem 1.5rem;
    text-align: center;
    cursor: pointer;
    position: relative;
    transition: all var(--transition-speed) ease;
    background: rgba(255, 255, 255, 0.02);
}

.file-uploader:hover, .file-uploader.dragover {
    border-color: var(--primary);
    background: rgba(6, 182, 212, 0.02);
    box-shadow: 0 0 15px var(--primary-glow);
}

.file-uploader input[type="file"] {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.uploader-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    pointer-events: none;
}

.upload-icon {
    color: var(--text-secondary);
    transition: transform var(--transition-speed) ease, color var(--transition-speed) ease;
}

.file-uploader:hover .upload-icon {
    transform: translateY(-4px);
    color: var(--primary);
}

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

.uploader-text .highlight {
    color: var(--primary);
    font-weight: 600;
}

.file-info {
    font-size: 0.8rem;
    color: var(--secondary);
    font-weight: 500;
    background: rgba(16, 185, 129, 0.08);
    padding: 0.25rem 0.75rem;
    border-radius: 100px;
    margin-top: 0.25rem;
}

/* --- Forms & Configuration Styling --- */
.settings-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.025em;
}

input[type="text"] {
    background: rgba(15, 17, 26, 0.6);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 0.9rem;
    outline: none;
    transition: all var(--transition-speed) ease;
}

input[type="text"]:focus {
    border-color: var(--primary);
    box-shadow: 0 0 10px var(--primary-glow);
}

.help-text {
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* --- Buttons & Call To Actions --- */
.btn {
    border-radius: 8px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    outline: none;
    border: none;
    transition: all var(--transition-speed) ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, #0891b2 100%);
    color: #fff;
    box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--primary-glow);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
    border-radius: 12px;
}

.btn-success {
    background: linear-gradient(135deg, var(--secondary) 0%, #059669 100%);
    color: #fff;
    box-shadow: 0 4px 15px var(--secondary-glow);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--secondary-glow);
}

.btn-info {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--card-border);
}

.btn-info:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.btn-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
    width: 100%;
}

@media (max-width: 640px) {
    .btn-group {
        flex-direction: column;
    }
}

.action-container {
    display: flex;
    justify-content: center;
    margin: 1.5rem 0;
}

/* --- Progress, Loaders & Status --- */
.status-box {
    background: rgba(15, 17, 26, 0.4);
    border: 1px solid var(--card-border);
    padding: 1.25rem;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.status-header {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    font-weight: 600;
}

.status-text {
    color: var(--text-primary);
}

.status-percent {
    color: var(--primary);
}

.progress-bar-container {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 100px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 100px;
    transition: width 0.1s ease;
}

.status-detail {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* --- Results & Stats Layout --- */
.results-box {
    animation: slideUp 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

@keyframes slideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.section-subtitle {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 0.025em;
    text-transform: uppercase;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

@media (max-width: 500px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

.stat-card {
    background: rgba(15, 17, 26, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.03);
    padding: 1.25rem 1rem;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    text-align: center;
}

.stat-val {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.export-actions {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 1.5rem;
}

.text-center {
    text-align: center;
}

/* --- Utility Classes --- */
.hidden {
    display: none !important;
}