:root {
    --uncuyo-navy: #002855;
    --uncuyo-navy-dark: #001a3a;
    --uncuyo-blue: #004b87;
    --uncuyo-blue-hover: #003663;
    --uncuyo-cyan: #0077b6;
    --uncuyo-light-bg: #f3f6f9;
    --uncuyo-card-bg: #ffffff;
    
    --border-color: #dce3ec;
    --border-focus: #0077b6;
    
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    
    --accent-success: #059669;
    --accent-success-hover: #047857;
    --accent-error: #dc2626;
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 40, 85, 0.08);
    --shadow-lg: 0 10px 25px rgba(0, 40, 85, 0.12);
    
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--uncuyo-light-bg);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    line-height: 1.5;
}

/* Header Top Banner */
.app-header-nav {
    width: 100%;
    background: linear-gradient(135deg, var(--uncuyo-navy-dark) 0%, var(--uncuyo-navy) 100%);
    border-bottom: 4px solid var(--uncuyo-cyan);
    color: #ffffff;
    padding: 24px 20px;
    display: flex;
    justify-content: center;
    box-shadow: var(--shadow-md);
}

.header-content {
    width: 100%;
    max-width: 680px;
    display: flex;
    align-items: center;
    gap: 20px;
}

.app-logo,
.uncuyo-logo {
    height: 52px;
    width: auto;
    object-fit: contain;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.header-titles {
    margin-left: auto;
    text-align: right;
}

.header-titles h1 {
    font-size: 1.45rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    color: #ffffff;
}

.header-titles p {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.8);
    margin-top: 2px;
}

/* App Container */
.app-container {
    width: 100%;
    max-width: 680px;
    padding: 32px 16px 40px 16px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    flex-grow: 1;
}

.main-content {
    width: 100%;
}

/* Card Container */
.card {
    background: var(--uncuyo-card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.hidden {
    display: none !important;
}

/* Drop Zone */
.drop-zone {
    border: 2px dashed #b0c4de;
    border-radius: var(--radius-md);
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: #f8fafc;
    position: relative;
}

.drop-zone:hover, .drop-zone.dragover {
    border-color: var(--uncuyo-blue);
    background: #eff6ff;
}

.drop-icon {
    color: var(--uncuyo-blue);
    margin-bottom: 12px;
    transition: var(--transition);
}

.drop-zone:hover .drop-icon {
    transform: translateY(-2px);
}

.drop-text {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
}

.drop-subtext {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

.file-input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

/* Selected File Info */
.selected-file-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #f1f5f9;
    border: 1px solid var(--border-color);
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-top: 16px;
}

.file-details {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.file-name {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--uncuyo-navy);
}

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

.btn-text {
    background: transparent;
    border: none;
    color: var(--accent-error);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
}

.btn-text:hover {
    text-decoration: underline;
}

/* Form Controls */
.options-group {
    margin-top: 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--uncuyo-navy);
}

.form-select {
    width: 100%;
    padding: 12px 14px;
    background-color: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition);
}

.form-select:focus {
    border-color: var(--uncuyo-blue);
    box-shadow: 0 0 0 3px rgba(0, 75, 135, 0.15);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 14px 20px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    margin-top: 24px;
}

.btn-primary {
    background-color: var(--uncuyo-navy);
    color: #ffffff;
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--uncuyo-blue-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-success {
    background-color: var(--accent-success);
    color: #ffffff;
    margin-top: 0;
}

.btn-success:hover {
    background-color: var(--accent-success-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: #e2e8f0;
    color: var(--text-primary);
    margin-top: 0;
}

.btn-secondary:hover {
    background-color: #cbd5e1;
}

/* Status Section */
.status-header {
    display: flex;
    align-items: center;
    gap: 16px;
}

.status-indicator {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid rgba(0, 75, 135, 0.2);
    border-top-color: var(--uncuyo-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.status-icon {
    font-size: 1.25rem;
    font-weight: bold;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.success-icon {
    background: #d1fae5;
    color: var(--accent-success);
}

.error-icon {
    background: #fee2e2;
    color: var(--accent-error);
}

.status-title-group h2 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--uncuyo-navy);
}

.status-title-group p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

/* Progress bar */
.progress-bar-container {
    width: 100%;
    height: 6px;
    background: #e2e8f0;
    border-radius: 3px;
    margin-top: 20px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    width: 30%;
    background: var(--uncuyo-blue);
    border-radius: 3px;
    animation: pulse-progress 1.5s ease-in-out infinite;
}

@keyframes pulse-progress {
    0% { width: 15%; transform: translateX(0); }
    50% { width: 65%; }
    100% { width: 100%; }
}

/* Results Grid */
.results-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-top: 24px;
}

.stat-box {
    background: #f8fafc;
    border: 1px solid var(--border-color);
    padding: 14px;
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.stat-box.highlight {
    border-color: #a7f3d0;
    background: #ecfdf5;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.stat-value {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--uncuyo-navy);
}

.stat-box.highlight .stat-value {
    color: var(--accent-success);
}

.error-box {
    margin-top: 20px;
    background: #fef2f2;
    border: 1px solid #fecaca;
    padding: 14px;
    border-radius: var(--radius-sm);
    color: var(--accent-error);
    font-size: 0.9rem;
}

/* Disclaimer Box */
.disclaimer-box {
    margin-top: 20px;
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    color: #991b1b;
    font-size: 0.85rem;
    line-height: 1.45;
}

.disclaimer-icon {
    flex-shrink: 0;
    margin-top: 2px;
    color: #dc2626;
}

.action-row {
    margin-top: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* Footer */
.app-footer {
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: auto;
}