:root {
    --primary-color: #3b82f6;
    --secondary-color: #8b5cf6;
    --success-color: #10b981;
    --error-color: #ef4444;
    --light-bg: #f8fafc;
    --white: #ffffff;
    --border-light: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    margin: 0;
    color: var(--text-primary);
}

.navbar {
    background: var(--white);
    padding: 18px 24px;
    border-bottom: 1px solid var(--border-light);
    font-weight: 600;
    font-size: 18px;
    box-shadow: var(--shadow-sm);
    color: var(--primary-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

.page-header {
    margin-bottom: 40px;
    text-align: center;
}

.page-header h1 {
    font-size: 32px;
    margin: 0 0 12px 0;
    color: var(--text-primary);
}

.page-header .subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    margin: 0;
}

.main-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 30px;
    align-items: start;
}

@media (max-width: 968px) {
    .main-grid {
        grid-template-columns: 1fr;
    }
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
}

.card {
    background: var(--white);
    padding: 20px;
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-primary);
    border: 1px solid var(--border-light);
    transition: all 0.2s ease;
    box-shadow: var(--shadow-sm);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card h3 {
    margin: 0 0 10px;
    color: var(--primary-color);
}

.card p {
    color: var(--text-secondary);
    font-size: 14px;
    margin: 0;
}

/* FORM STYLING */

.form-section {
    position: sticky;
    top: 20px;
}

.form-card {
    background: var(--white);
    padding: 28px;
    border-radius: 14px;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-md);
}

.form-title {
    font-size: 20px;
    margin: 0 0 24px 0;
    color: var(--text-primary);
    font-weight: 600;
}

.form-group {
    margin-bottom: 22px;
}

label {
    font-weight: 600;
    display: block;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-size: 14px;
}

small.hint {
    display: block;
    margin-top: 6px;
    color: var(--text-secondary);
    font-size: 12px;
}

input[type="text"],
input[type="number"],
input[type="file"] {
    width: 100%;
    padding: 11px 14px;
    border-radius: 8px;
    border: 1.5px solid var(--border-light);
    font-size: 14px;
    font-family: inherit;
    transition: all 0.3s ease;
    background: var(--light-bg);
    color: var(--text-primary);
}

input[type="text"]:focus,
input[type="number"]:focus,
input[type="file"]:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--white);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Remove spinner arrows from number input */
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type="number"] {
    -moz-appearance: textfield;
}

.file-input-wrapper {
    position: relative;
    overflow: hidden;
}

.file-input-wrapper input[type="file"] {
    display: none;
}

.file-label {
    display: block;
    padding: 12px 14px;
    background: var(--light-bg);
    border: 1.5px dashed var(--border-light);
    border-radius: 8px;
    cursor: pointer;
    text-align: center;
    transition: all 0.3s ease;
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 400;
    margin: 0;
}

.file-label:hover {
    border-color: var(--primary-color);
    background: rgba(59, 130, 246, 0.05);
    color: var(--primary-color);
}

.file-input-wrapper input[type="file"]:focus + .file-label {
    border-color: var(--primary-color);
    background: rgba(59, 130, 246, 0.05);
    color: var(--primary-color);
}

.file-input-wrapper input[type="file"]:focus {
    outline: none;
}

/* BUTTON */

.button-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, #2563eb 100%);
    color: white;
    padding: 13px 24px;
    border: none;
    border-radius: 8px;
    width: 100%;
    font-weight: 600;
    cursor: pointer;
    font-size: 15px;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
}

.button-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.button-primary:active {
    transform: translateY(0);
}

/* RESULTS SECTION */

.results-section {
    min-height: 200px;
}

.error-box {
    background: #fee2e2;
    border: 1.5px solid #fca5a5;
    border-radius: 10px;
    padding: 16px 20px;
    color: #991b1b;
    font-size: 14px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
}

.results-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.results-title {
    font-size: 22px;
    margin: 0 0 20px 0;
    color: var(--text-primary);
    font-weight: 700;
}

.result-card {
    background: var(--white);
    border-radius: 14px;
    border: 1px solid var(--border-light);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.result-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.result-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-light);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.03) 0%, rgba(139, 92, 246, 0.03) 100%);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.result-header h3 {
    margin: 0;
    font-size: 18px;
    color: var(--text-primary);
}

.result-badge {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.vina-card .result-badge {
    background: linear-gradient(135deg, #3b82f6 0%, #1e40af 100%);
}

.ad4-card .result-badge {
    background: linear-gradient(135deg, #f97316 0%, #dc2626 100%);
}

.result-grid {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.result-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.result-row.full-width {
    grid-template-columns: 1fr;
}

@media (max-width: 600px) {
    .result-row {
        grid-template-columns: 1fr;
    }
}

.result-item {
    background: var(--light-bg);
    padding: 16px;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    border: 1px solid var(--border-light);
    transition: all 0.2s ease;
}

.result-item:hover {
    background: #f1f5f9;
    border-color: var(--primary-color);
}

.result-label {
    font-size: 12px;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.result-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-color);
    font-family: 'Courier New', monospace;
    word-break: break-all;
}

.ad4-card .result-value {
    color: #f97316;
}

/* Responsive */
@media (max-width: 768px) {
    .result-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .page-header h1 {
        font-size: 24px;
    }
    
    .form-section {
        position: static;
    }
}