:root {
    --primary-red: #B21A27;
    --primary-red-dark: #8a1420;
    --primary-red-light: rgba(178, 26, 39, 0.08);
    --dark-black: #1A1A1A;
    --dark-gray: #333333;
    --text-muted: #666666;
    --off-white: #F8F9FA;
    --pure-white: #FFFFFF;
    --border-color: rgba(0, 0, 0, 0.08);
    --header-height: 64px;
    --transition: all 0.25s ease;
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Atkinson Hyperlegible', sans-serif;
}

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

html,
body {
    height: 100%;
    background-color: var(--off-white);
    color: var(--dark-black);
    font-family: var(--font-body);
    -webkit-font-smoothing: antialiased;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    min-height: 100dvh;
    overflow-x: hidden;
}

/* Skip link */
.skip-link {
    position: absolute;
    top: -100px;
    left: 20px;
    background-color: var(--primary-red);
    color: var(--pure-white);
    padding: 10px 18px;
    z-index: 2000;
    font-weight: 700;
    border-radius: 0 0 6px 6px;
    transition: top 0.2s ease;
    text-decoration: none;
    font-size: 0.9rem;
}

.skip-link:focus-visible {
    top: 0;
    outline: 3px solid var(--primary-red-dark);
}

/* Header Navigation */
.site-header {
    position: sticky;
    top: 0;
    height: var(--header-height);
    background-color: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    display: flex;
    align-items: center;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.03);
}

.header-inner {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

/* Back to Home Link */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--dark-black);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.95rem;
    padding: 8px 14px;
    border-radius: 8px;
    transition: var(--transition);
    background-color: transparent;
}

.back-link:hover {
    background-color: rgba(0, 0, 0, 0.04);
    color: var(--primary-red);
}

.back-link:focus-visible {
    outline: 3px solid var(--primary-red);
    outline-offset: 2px;
}

.back-arrow-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--off-white);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    flex-shrink: 0;
}

.back-link:hover .back-arrow-icon {
    background-color: var(--primary-red);
    color: var(--pure-white);
    border-color: var(--primary-red);
    transform: translateX(-3px);
}

.back-arrow-icon svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
    transition: transform var(--transition);
}

.header-logo {
    height: 28px;
    width: auto;
    vertical-align: middle;
    transition: opacity var(--transition);
}

.back-link:hover .header-logo {
    opacity: 0.85;
}

.back-text {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.back-text-mobile {
    display: none;
}

.divider {
    color: #d1d5db;
    font-weight: 400;
}

/* Header Right Side */
.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background-color: var(--primary-red-light);
    color: var(--primary-red);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.78rem;
    padding: 6px 14px;
    border-radius: 50px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.external-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    border-radius: 8px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--dark-gray);
    background-color: var(--pure-white);
    border: 1px solid var(--border-color);
    text-decoration: none;
    transition: var(--transition);
}

.external-btn:hover {
    background-color: var(--off-white);
    color: var(--primary-red);
    border-color: rgba(178, 26, 39, 0.2);
}

.external-btn svg {
    width: 14px;
    height: 14px;
    stroke: currentColor;
}

/* Main Content Container */
.main-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    padding: 16px 16px 24px;
}

/* Form Card */
.form-card {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--pure-white);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    position: relative;
    min-height: calc(100vh - var(--header-height) - 40px);
    min-height: calc(100dvh - var(--header-height) - 40px);
}

/* Loading Skeleton */
.loading-state {
    position: absolute;
    inset: 0;
    background-color: var(--pure-white);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    z-index: 5;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.loading-state.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.spinner {
    width: 44px;
    height: 44px;
    border: 3px solid rgba(178, 26, 39, 0.15);
    border-top-color: var(--primary-red);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-text {
    font-size: 0.95rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* Iframe */
.form-iframe {
    width: 100%;
    height: 100%;
    flex: 1;
    min-height: 1200px;
    border: none;
    display: block;
    background-color: var(--pure-white);
}

/* Footer notice */
.form-footer-notice {
    padding: 14px 20px;
    background-color: #FAFAFA;
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.form-footer-notice a {
    color: var(--primary-red);
    font-weight: 600;
    text-decoration: underline;
    text-underline-offset: 3px;
}

.form-footer-notice a:hover {
    color: var(--primary-red-dark);
}

/* Responsive Breakpoints */
@media (max-width: 768px) {
    :root {
        --header-height: 58px;
    }

    .main-container {
        padding: 0;
        max-width: 100%;
    }

    .form-card {
        border-radius: 0;
        border-left: none;
        border-right: none;
        border-top: none;
        box-shadow: none;
        min-height: calc(100vh - var(--header-height));
        min-height: calc(100dvh - var(--header-height));
    }

    .header-inner {
        padding: 0 12px;
    }

    .back-link {
        padding: 6px 8px;
        gap: 8px;
        font-size: 0.88rem;
    }

    .back-text-full {
        display: none;
    }

    .back-text-mobile {
        display: inline;
    }

    .back-arrow-icon {
        width: 28px;
        height: 28px;
    }

    .header-badge {
        padding: 4px 10px;
        font-size: 0.7rem;
    }

    .external-btn span {
        display: none;
    }

    .external-btn {
        padding: 7px;
    }
}