:root {
    --primary: #002D3D; /* Deep Radisson Navy */
    --accent: #005670;
    --gold: #C5A059;
    --gold-hover: #b38d48;
    --bg-gradient: linear-gradient(135deg, #00121a 0%, #002D3D 100%);
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-main: #ffffff;
    --text-muted: rgba(255, 255, 255, 0.6);
    --radius-lg: 24px;
    --radius-md: 16px;
    --shadow-premium: 0 40px 80px rgba(0, 0, 0, 0.5);
    --transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    background: var(--bg-gradient);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    color: var(--text-main);
}

.survey-container {
    background: var(--glass-bg);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    width: 100%;
    max-width: 1100px;
    min-height: 650px;
    border-radius: var(--radius-lg);
    display: flex;
    box-shadow: var(--shadow-premium);
    overflow: hidden;
    border: 1px solid var(--glass-border);
    animation: containerAppear 1s cubic-bezier(0.165, 0.84, 0.44, 1);
}

@keyframes containerAppear {
    from { opacity: 0; transform: scale(0.96) translateY(20px); filter: blur(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); filter: blur(0); }
}

/* Left Panel */
.left-panel {
    flex: 0.8;
    padding: 60px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    overflow: hidden;
}

.left-panel::before {
    content: '';
    position: absolute;
    top: -30%;
    left: -30%;
    width: 250px;
    height: 250px;
    background: var(--gold);
    filter: blur(150px);
    opacity: 0.15;
    border-radius: 50%;
    z-index: -1;
}

.step-indicator {
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 25px;
}

.question-text {
    font-size: 2.8rem;
    line-height: 1.1;
    font-weight: 800;
    margin-bottom: 25px;
    color: white;
}

.sub-text {
    font-size: 1.15rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.brand-footer {
    display: flex;
    align-items: center;
    gap: 15px;
}

.brand-line {
    width: 40px;
    height: 2px;
    background: var(--gold);
}

/* Right Panel */
.right-panel {
    flex: 1.2;
    padding: 80px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: rgba(255, 255, 255, 0.02);
    border-left: 1px solid var(--glass-border);
}

.options-container {
    display: grid;
    gap: 16px;
}

.info-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gold);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.input-premium {
    width: 100%;
    padding: 18px 24px;
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    color: white;
    background: rgba(255, 255, 255, 0.04);
    transition: var(--transition);
}
.input-premium::placeholder { color: rgba(255,255,255,0.3); }

.input-premium:focus {
    border-color: var(--gold);
    background: rgba(255, 255, 255, 0.08);
    outline: none;
    box-shadow: 0 0 0 4px rgba(197, 160, 89, 0.15);
}

/* Option Cards (Glassmorphism) */
.option-card {
    padding: 24px;
    border: 1px solid var(--glass-border);
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 20px;
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
}

.option-card:hover {
    transform: translateX(8px);
    border-color: rgba(255, 255, 255, 0.25);
    background: rgba(255, 255, 255, 0.08);
}

.option-card.selected {
    background: var(--gold);
    border-color: var(--gold);
    color: var(--primary);
    box-shadow: 0 10px 20px rgba(197, 160, 89, 0.2);
}

.radio-circle {
    width: 24px;
    height: 24px;
    border: 2px solid rgba(255,255,255,0.4);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.option-card.selected .radio-circle {
    border-color: var(--primary);
}

.radio-inner {
    width: 12px;
    height: 12px;
    background: var(--primary);
    border-radius: 50%;
    transform: scale(0);
    transition: var(--transition);
}

.option-card.selected .radio-inner {
    transform: scale(1);
}

/* Language Cards */
.lang-selection {
    display: flex;
    gap: 25px;
}

.lang-card {
    flex: 1;
    padding: 50px 30px;
    border: 1px solid var(--glass-border);
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-md);
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.lang-card:hover {
    border-color: var(--gold);
    background: rgba(255, 255, 255, 0.06);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(197, 160, 89, 0.15);
}

.lang-card h3 {
    font-size: 2rem;
    color: var(--gold);
    margin-bottom: 5px;
}

.lang-card p {
    color: var(--text-muted);
}

/* Nav Buttons */
.nav-buttons {
    margin-top: 40px;
    display: flex;
    justify-content: space-between;
}

.btn-premium {
    padding: 16px 40px;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 1.05rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    letter-spacing: 0.5px;
}

.btn-prev {
    background: transparent;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 20px;
}

.btn-prev:hover {
    color: white;
}

.btn-next {
    background: var(--gold);
    color: var(--primary);
    box-shadow: 0 10px 20px rgba(197, 160, 89, 0.25);
    margin-left: auto;
}

.btn-next:hover {
    background: var(--gold-hover);
    transform: translateY(-2px);
    box-shadow: 0 15px 30px rgba(197, 160, 89, 0.35);
}

/* Step Animations */
.step {
    display: none;
    opacity: 0;
}

.step.active {
    display: block;
    animation: stepEnter 0.6s forwards;
}

@keyframes stepEnter {
    from { opacity: 0; transform: translateX(30px); filter: blur(5px); }
    to { opacity: 1; transform: translateX(0); filter: blur(0); }
}

/* Modals */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 18, 26, 0.85); /* Deep dark blue transparent */
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.modal-backdrop.active {
    display: flex;
    opacity: 1;
}

.modal-card {
    background: rgba(10, 30, 45, 0.8);
    border: 1px solid var(--glass-border);
    padding: 60px 50px;
    border-radius: var(--radius-lg);
    max-width: 550px;
    width: 90%;
    text-align: center;
    box-shadow: 0 40px 80px rgba(0, 0, 0, 0.6);
    transform: scale(0.9) translateY(20px);
    transition: transform 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal-backdrop.active .modal-card {
    transform: scale(1) translateY(0);
}

.success-icon {
    width: 80px;
    height: 80px;
    background: rgba(197, 160, 89, 0.15);
    color: var(--gold);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin: 0 auto 30px;
    border: 1px solid rgba(197, 160, 89, 0.3);
}

.modal-title {
    font-size: 2rem;
    font-weight: 800;
    color: white;
    margin-bottom: 20px;
}

.modal-text {
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 40px;
}

@media (max-width: 900px) {
    .survey-container {
        flex-direction: column;
        min-height: auto;
    }

    .left-panel {
        padding: 40px;
        min-height: 250px;
    }
    .left-panel::before { display: none; }

    .right-panel {
        padding: 40px;
        border-left: none;
        border-top: 1px solid var(--glass-border);
    }

    .question-text {
        font-size: 2rem;
    }
    
    .option-card {
        padding: 18px 20px;
    }
    
    .lang-card {
        padding: 30px 20px;
    }
}