/* BYD Loan Simulator - Premium Light Theme */
:root {
    --byd-red: #686d71;
    --byd-black: #1a1a1f;
    --byd-grey: #6c757d;
    --byd-light-grey: #f1f3f5;
    --byd-white: #ffffff;
    --text-dark: #1a1a1f;
    --text-muted: #6c757d;
    --card-bg: #ffffff;
    --card-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    --input-bg: #f8f9fa;
    --input-border: #e9ecef;
    --transition-smooth: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

body {
    background-color: #f4f7f9;
    color: var(--text-dark);
    font-family: 'Outfit', 'Noto Sans JP', sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

/* Layout */
.simulator-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 120px 20px 60px;
}

.header {
    text-align: center;
    margin-bottom: 60px;
    animation: fadeInDown 0.8s ease-out;
}

.header h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 900;
    letter-spacing: -1px;
    margin-bottom: 10px;
    color: var(--byd-black);
}

.header h1 span {
    color: var(--byd-red);
}

.header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Simulator Card */
.simulator-card {
    background: var(--card-bg);
    border-radius: 32px;
    display: flex;
    flex-wrap: wrap;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    animation: fadeInUp 1s ease-out;
    border: 1px solid rgba(0,0,0,0.05);
}

/* Left Section: Inputs */
.inputs-section {
    flex: 1;
    min-width: 320px;
    padding: 40px;
    background: #ffffff;
}

.form-group {
    margin-bottom: 30px;
}

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--byd-black);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Custom Select & Inputs */
.custom-select, .custom-input {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 12px;
    color: var(--text-dark);
    padding: 15px;
    font-size: 1.1rem;
    transition: var(--transition-smooth);
    outline: none;
    -webkit-appearance: none;
}

.custom-select:focus, .custom-input:focus {
    border-color: var(--byd-red);
    background: #ffffff;
    box-shadow: 0 0 0 4px rgba(104, 109, 113, 0.1);
}

/* Term Toggle */
.term-toggle {
    display: flex;
    gap: 10px;
}

.term-btn {
    flex: 1;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    color: var(--text-dark);
    padding: 12px;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition-smooth);
}

.term-btn.active {
    background: var(--byd-red);
    border-color: var(--byd-red);
    color: white;
}

/* Slider */
.range-slider {
    width: 100%;
    height: 6px;
    background: var(--input-border);
    border-radius: 3px;
    -webkit-appearance: none;
    margin: 20px 0;
}

.range-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 24px;
    height: 24px;
    background: var(--byd-red);
    border: 4px solid #ffffff;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(104, 109, 113, 0.3);
}

/* Right Section: Display */
.display-section {
    flex: 1;
    min-width: 320px;
    padding: 40px;
    background: linear-gradient(145deg, #fffcfc 0%, #f9f9f9 100%);
    display: flex;
    flex-direction: column;
    justify-content: center;
    border-left: 1px solid var(--input-border);
}

.car-preview {
    text-align: center;
    margin-bottom: 40px;
}

.car-image {
    max-width: 100%;
    height: auto;
    filter: drop-shadow(0 15px 25px rgba(0,0,0,0.1));
    transition: var(--transition-smooth);
}

.monthly-result {
    text-align: center;
    margin-bottom: 40px;
}

.monthly-result .label {
    color: var(--text-muted);
    font-size: 1rem;
    margin-bottom: 5px;
}

.monthly-result .value {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 900;
    color: var(--byd-black);
    line-height: 1;
}

.monthly-result .unit {
    font-size: 1.5rem;
    margin-left: 5px;
}

.payment-breakdown {
    background: #ffffff;
    border-radius: 20px;
    padding: 25px;
    border: 1px solid var(--input-border);
}

.breakdown-row {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid var(--input-border);
    color: var(--text-dark);
}

.breakdown-row:last-child {
    border-bottom: none;
    padding-top: 20px;
    font-weight: 800;
    font-size: 1.2rem;
    color: var(--byd-red);
}

/* Extra Details for 5y Extension */
.extra-details {
    display: none;
    padding: 10px 0 10px 15px;
    background: #ffffff;
    border-bottom: 1px solid var(--input-border);
}

.extra-details.active {
    display: block;
}

.extra-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-muted);
    padding: 4px 0;
}

/* Presets */
.presets {
    display: flex;
    gap: 15px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.preset-btn {
    background: var(--byd-white);
    border: 1px solid var(--input-border);
    color: var(--text-muted);
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition-smooth);
    box-shadow: 0 2px 5px rgba(0,0,0,0.02);
}

.preset-btn:hover {
    background: var(--input-bg);
    color: var(--byd-red);
    border-color: var(--byd-red);
}

/* Animations */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsive */
@media (max-width: 992px) {
    .display-section {
        border-left: none;
        border-top: 1px solid var(--input-border);
    }
}
/* Explanation Section */
.explanation-section {
    padding-bottom: 60px;
}

.step-card {
    background: #ffffff;
    border-radius: 24px;
    padding: 40px 30px;
    height: 100%;
    transition: var(--transition-smooth);
    border: 1px solid rgba(0,0,0,0.05);
    box-shadow: 0 10px 30px rgba(0,0,0,0.03);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.step-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.08);
    border-color: rgba(104, 109, 113, 0.2);
}

.step-number {
    background: var(--byd-red);
    color: #ffffff;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    margin-bottom: 25px;
    font-size: 1rem;
    box-shadow: 0 5px 15px rgba(104, 109, 113, 0.3);
}

.disclaimer-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.disclaimer-list li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 12px;
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.7;
}

.disclaimer-list li::before {
    content: "■";
    position: absolute;
    left: 0;
    color: var(--byd-red);
    font-size: 0.6rem;
    top: 0.4rem;
}

.disclaimer-list li:last-child {
    margin-bottom: 0;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .explanation-section {
        padding-top: 40px !important;
        padding-bottom: 40px !important;
    }
    .step-card {
        padding: 30px 20px;
    }
}