:root {
    --primary-color: #9F3133;      /* Merah maroon (utama) */
    --secondary-color: #7A2527;   /* Merah tua (untuk hover/teks penting) */
    --accent-color: #D1A3A4;      /* Merah muda lembut (aksen) */
    --light-color: #FFF5F5;       /* Putih susu (background) */
    --dark-color: #ffffff;        /* Coklat gelap (teks/header) */
}

body {
    font-family: 'Montserrat', sans-serif;
    background: linear-gradient(135deg, #f8fafc, #e2e8f0);
    min-height: 100vh;
    padding: 40px 0;
}

.form-container {
    background-color: white;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    max-width: 850px;
    margin: 0 auto;
    transition: all 0.3s ease;
}

.form-container:hover {
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 30px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.header img {
    max-width: 150px;
    margin-bottom: 10px;
}

.header h1 {
    margin-top: 15px;
}

.header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 60%);
    animation: pulse 10s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.05); opacity: 0.7; }
    100% { transform: scale(1); opacity: 0.5; }
}

.form-section {
    padding: 40px;
}

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

.form-floating > label {
    font-weight: 500;
    color: #64748b;
}

.form-control:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 0.25rem rgba(159, 49, 51, 0.25);
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    padding: 12px 24px;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(122, 37, 39, 0.3);
}

.section-title {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid #e2e8f0;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 60px;
    height: 2px;
    background-color: var(--primary-color);
}

.alert {
    border-radius: 8px;
    font-weight: 500;
}

.step-indicator {
    display: flex;
    justify-content: space-between;
    margin-bottom: 30px;
}

.step {
    flex: 1;
    text-align: center;
    position: relative;
    padding-bottom: 20px;
}

.step-circle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: #e2e8f0;
    color: #64748b;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 10px;
    font-weight: 600;
    position: relative;
    z-index: 2;
    transition: all 0.3s ease;
}

.step.active .step-circle {
    background-color: var(--primary-color);
    color: white;
    box-shadow: 0 0 0 5px rgba(159, 49, 51, 0.2);
}

.step-title {
    font-size: 14px;
    color: #64748b;
    transition: all 0.3s ease;
}

.step.active .step-title {
    color: var(--primary-color);
    font-weight: 600;
}

.step-connector {
    position: absolute;
    top: 20px;
    left: 50%;
    width: 100%;
    height: 2px;
    background-color: #e2e8f0;
}

.step:last-child .step-connector {
    display: none;
}

.form-step {
    display: none;
}

.form-step.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

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

.btn-nav {
    margin-top: 20px;
}

.footer {
    text-align: center;
    color: #64748b;
    font-size: 14px;
    padding: 20px;
    background-color: #f8fafc;
    border-top: 1px solid #e2e8f0;
}

.is-invalid {
    border-color: #dc3545 !important;
}

.invalid-feedback {
    color: #dc3545;
    font-size: 0.875em;
    margin-top: 0.25rem;
}

.social-media-label {
    display: flex;
    align-items: center;
}

.image-preview img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin-bottom: 10px;
    border: 1px solid var(--accent-color);
}

.image-preview .col-md-3 {
    margin-bottom: 15px;
}