:root {
    --primary-color: #003366;
    --primary-gradient: linear-gradient(135deg, #003366 0%, #004080 100%);
    --secondary-color: #f8fafc;
    --accent-color: #cc0000;
    --text-color: #1e293b;
    --text-light: #64748b;
    --border-color: #e2e8f0;
    --success-color: #2e7d32;
    --error-color: #dc2626;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--secondary-color);
    color: var(--text-color);
    line-height: 1.6;
}

.header {
    background-color: #fff;
    border-bottom: 3px solid var(--primary-color);
    padding: 10px 0;
    text-align: center;
}

.header img {
    max-height: 60px;
}

.nav {
    background-color: var(--primary-color);
    color: #fff;
    padding: 10px 0;
    text-align: center;
    font-weight: bold;
    font-size: 0.9rem;
}

.container {
    max-width: 600px;
    margin: 40px auto;
    background-color: #fff;
    padding: 40px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    border-radius: 12px;
}

h1 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.info-box {
    background-color: #e7f3fe;
    border-left: 6px solid #2196F3;
    padding: 15px;
    margin-bottom: 25px;
    font-size: 0.9rem;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: bold;
    margin-bottom: 5px;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 5px rgba(0,51,102,0.2);
}

.btn {
    background: var(--primary-gradient);
    color: #fff;
    border: none;
    padding: 16px 30px;
    font-size: 1rem;
    cursor: pointer;
    border-radius: 8px;
    width: 100%;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px -1px rgba(0, 51, 102, 0.2);
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 15px -3px rgba(0, 51, 102, 0.3);
    filter: brightness(1.1);
}

.btn:active {
    transform: translateY(0);
}

.footer {
    text-align: center;
    margin-top: 40px;
    font-size: 0.8rem;
    color: #777;
    padding: 20px;
}

.plate-input {
    text-transform: uppercase;
    font-family: 'Courier New', Courier, monospace;
    font-weight: bold;
    letter-spacing: 2px;
    text-align: center;
    font-size: 1.5rem !important;
}

.loading-spinner {
    display: none;
    margin: 20px auto;
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* SMS Flow Styles */
.error-box {
    background-color: #fef2f2;
    border: 1px solid #fee2e2;
    border-radius: 8px;
    padding: 14px 18px;
    margin-bottom: 20px;
    color: var(--error-color);
    font-size: 0.9rem;
    display: none;
    text-align: center;
    font-weight: 500;
}

.waiting-box {
    background-color: #f0f9ff;
    border: 1px solid #e0f2fe;
    border-radius: 8px;
    padding: 24px;
    text-align: center;
    display: none;
}

.waiting-box p { 
    margin: 0 0 16px; 
    color: #0369a1; 
    font-weight: 600; 
}