:root {
    --primary: #ff5a27;
    --primary-hover: #e64e1f;
    --bg-color: #fafbfc;
    --card-bg: #ffffff;
    --text-main: #0c0e12;
    --text-muted: #5f6368;
    --border-color: #e0e4e8;
    --input-bg: #ffffff;
    --shadow: 0 4px 25px rgba(0, 0, 0, 0.06);
    --radius: 16px;
    --transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
    line-height: 1.6;
    overflow-x: hidden;
    scroll-behavior: smooth;
}

.container {
    width: 100%;
    max-width: 650px;
    margin: 0 auto;
    animation: fadeIn 0.8s ease-out forwards;
}

header {
    text-align: center;
    margin-bottom: clamp(30px, 5vw, 50px);
}

.badge {
    display: inline-block;
    padding: 6px 18px;
    border: 1.5px solid var(--primary);
    color: var(--primary);
    border-radius: 50px;
    font-size: clamp(0.75rem, 2vw, 0.85rem);
    font-weight: 600;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

h1 {
    font-size: clamp(2rem, 8vw, 2.75rem);
    font-weight: 700;
    margin-bottom: 12px;
    line-height: 1.1;
    letter-spacing: -1px;
}

.description {
    color: var(--text-muted);
    font-size: clamp(0.95rem, 3vw, 1.1rem);
    max-width: 520px;
    margin: 0 auto;
}

form {
    background: var(--card-bg);
    padding: clamp(25px, 6vw, 45px);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

@media (min-width: 600px) {
    .form-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .full-width {
        grid-column: span 2;
    }
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-main);
}

input, select, textarea {
    padding: 14px 18px;
    border: 1.5px solid var(--border-color);
    border-radius: 12px;
    font-size: 1rem;
    transition: var(--transition);
    background: var(--input-bg);
    width: 100%;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(255, 90, 39, 0.1);
}

/* Custom Selection Groups */
.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    padding-top: 5px;
}

.grid-group {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 12px;
}

.checkbox-container {
    display: flex;
    align-items: center;
    position: relative;
    padding-left: 35px;
    cursor: pointer;
    font-size: 0.95rem;
    user-select: none;
    color: var(--text-muted);
    transition: color 0.2s;
    min-height: 24px;
}

.checkbox-container:hover {
    color: var(--text-main);
}

.checkbox-container input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.checkmark {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    left: 0;
    height: 22px;
    width: 22px;
    background-color: #f0f2f5;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    transition: all 0.2s ease-in-out;
}

.checkbox-container:hover input ~ .checkmark {
    background-color: #e4e6e9;
    border-color: #ccc;
}

.checkbox-container input:checked ~ .checkmark {
    background-color: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 4px 10px rgba(255, 90, 39, 0.2);
}

.checkmark:after {
    content: "";
    position: absolute;
    display: none;
}

.checkbox-container input:checked ~ .checkmark:after {
    display: block;
}

.checkbox-container .checkmark:after {
    left: 8px;
    top: 4px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2.5px 2.5px 0;
    transform: rotate(45deg);
}

/* Radio Specific Classes */
.radio-mark {
    border-radius: 50% !important;
}

.radio-mark:after {
    left: 7px !important;
    top: 7px !important;
    width: 8px !important;
    height: 8px !important;
    border-radius: 50% !important;
    background: white !important;
    border: none !important;
    transform: none !important;
}

/* Dynamic Details Container */
.payment-details-box {
    width: 100%;
    margin-top: 25px;
    padding: 25px;
    background: #fff8f5;
    border-left: 4px solid var(--primary);
    border-radius: var(--radius);
    animation: slideUp 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    box-shadow: inset 0 0 10px rgba(255, 90, 39, 0.03);
}

.payment-details-box h3 {
    margin-bottom: 12px;
    color: var(--primary);
    font-size: 1.15rem;
    font-weight: 700;
}

.payment-details-box p {
    margin: 10px 0;
    font-size: 0.95rem;
    color: #4a4a4a;
    line-height: 1.5;
}

.payment-details-box strong {
    color: var(--text-main);
}

.submit-btn {
    margin-top: 35px;
    background: var(--primary);
    color: white;
    border: none;
    padding: 18px;
    border-radius: 14px;
    font-size: 1.15rem;
    font-weight: 700;
    cursor: pointer;
    width: 100%;
    transition: var(--transition);
    will-change: transform, box-shadow;
}

.submit-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-3px) scale(1.01);
    box-shadow: 0 12px 30px rgba(255, 90, 39, 0.35);
}

.submit-btn:active {
    transform: translateY(-1px);
}

footer {
    text-align: center;
    margin-top: 40px;
    padding-bottom: 20px;
}

footer p {
    color: var(--text-muted);
    font-size: 0.95rem;
    opacity: 1 !important;
}

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

@keyframes slideUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* High-res Optimization */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}