:root {
    --primary-color: #0f1d40;
    --primary-gradient: linear-gradient(135deg, #233872 0%, #162447 60%, #0f1d40 100%);
    --secondary-color: #2d3748;
    --accent-color: #3b82f6;
    --accent-alt: #6366f1;
    --light-color: #f7fafc;
    --border-color: #e2e8f0;
    --muted-color: #94a3b8;
    --shadow-soft: 0 25px 50px rgba(15, 23, 42, 0.08);
    --shadow-card: 0 20px 60px rgba(15, 23, 42, 0.12);
    --success-color: #22c55e;
    --warning-color: #dd6b20;
    --danger-color: #ef4444;
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

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

body {
    color: var(--secondary-color);
    line-height: 1.6;
    min-height: 100vh;
    font-family: inherit;
}

.app-body {
    position: relative;
    background: #eef2ff;
    overflow-x: hidden;
}

.app-body.modal-open {
    overflow: hidden;
}

.background-ornament {
    position: fixed;
    inset: 0;
    background: radial-gradient(circle at 20% 20%, rgba(99, 102, 241, 0.25), transparent 55%),
                radial-gradient(circle at 80% 0%, rgba(59, 130, 246, 0.25), transparent 45%),
                var(--primary-gradient);
    opacity: 0.12;
    pointer-events: none;
    z-index: 0;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 20px;
    background: var(--accent-color);
    color: white;
    padding: 10px 18px;
    border-radius: 999px;
    text-decoration: none;
    transition: top 0.2s ease;
    z-index: 10;
}

.skip-link:focus {
    top: 20px;
}

.container {
    position: relative;
    z-index: 1;
    max-width: 960px;
    margin: 0 auto;
    padding: 32px clamp(16px, 4vw, 36px) 48px;
}

/* Header */

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    font-size: 24px;
    font-weight: 800;
    color: var(--primary-color);
    letter-spacing: 0.03em;
}

.language-switcher {
    display: flex;
    gap: 10px;
}

.lang-btn {
    padding: 8px 15px;
    border: 1px solid var(--border-color);
    background: white;
    border-radius: 999px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 600;
    font-size: 14px;
    min-width: 52px;
}

.lang-btn.active {
    background: linear-gradient(120deg, var(--accent-color), var(--accent-alt));
    color: white;
    border-color: transparent;
    box-shadow: 0 12px 30px rgba(99, 102, 241, 0.34);
}

.lang-btn:hover:not(.active) {
    background: #edf2f7;
}

/* Cards & Steps */

.card {
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow-soft);
    padding: clamp(24px, 5vw, 36px);
    margin-bottom: 32px;
    transition: transform 0.3s ease, opacity 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid rgba(15, 23, 42, 0.06);
}

.card:hover {
    box-shadow: var(--shadow-card);
    transform: translateY(-2px);
}

.step {
    display: none;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.5s, transform 0.5s;
}

.step.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

h1 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 28px;
}

.hero-card {
    background: white;
    border: none;
    box-shadow: 0 30px 80px rgba(15, 23, 42, 0.18);
    overflow: hidden;
    position: relative;
}

.hero-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top right, rgba(59, 130, 246, 0.12), transparent 40%);
    pointer-events: none;
}

.eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.2em;
    font-size: 12px;
    color: var(--muted-color);
    margin-bottom: 12px;
    font-weight: 700;
}

.hero-meta {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 18px;
    margin-top: 28px;
}

.hero-meta strong {
    display: block;
    font-size: 26px;
    color: var(--primary-color);
}

.hero-meta span {
    color: var(--muted-color);
    font-size: 14px;
}

h2 {
    color: var(--secondary-color);
    margin-bottom: 20px;
    font-size: clamp(1.35rem, 2vw, 1.65rem);
}

p {
    margin-bottom: 20px;
}

/* Buttons */

.button-group {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin: 30px 0;
}

.btn {
    padding: 15px 20px;
    border: none;
    border-radius: 999px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    text-align: center;
    text-decoration: none;
    display: block;
}

.btn-primary {
    background: linear-gradient(120deg, var(--accent-color), var(--accent-alt));
    color: white;
    box-shadow: 0 15px 35px rgba(59, 130, 246, 0.35);
}

.btn-primary:hover {
    background: linear-gradient(120deg, #2563eb, var(--accent-alt));
    transform: translateY(-2px);
    box-shadow: 0 20px 45px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
    background-color: var(--light-color);
    color: var(--secondary-color);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: #e2e8f0;
    transform: translateY(-1px);
}

.btn-warning {
    background-color: var(--warning-color);
    color: white;
}

.btn-warning:hover {
    background-color: #c05621;
    transform: translateY(-1px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
}

.btn:focus-visible {
    outline: 3px solid rgba(59, 130, 246, 0.4);
    outline-offset: 2px;
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background-color: #dc2626;
    transform: translateY(-1px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
}


/* Trust section */

.trust-signals {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
}

.selected-action {
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 20px;
    background: #f8fafc;
    margin: 24px 0;
}

.selected-action-label {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    color: var(--muted-color);
    font-size: 15px;
    margin-bottom: 12px;
}

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    background: rgba(99, 102, 241, 0.15);
    color: var(--accent-alt);
    font-weight: 700;
}

.action-summary h3 {
    margin: 0 0 6px;
    font-size: 18px;
}

.action-summary p {
    margin: 0;
    color: var(--secondary-color);
}

.captcha-lab {
    margin: 28px 0 10px;
    padding: 24px;
    border-radius: 18px;
    border: 1px solid rgba(15, 23, 42, 0.08);
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.06), rgba(99, 102, 241, 0.06));
    box-shadow: 0 20px 45px rgba(15, 23, 42, 0.08);
}


.math-challenge {
    margin-bottom: 20px;
}

.math-inline {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-top: 8px;
    flex-wrap: wrap;
}

.math-inline span {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-color);
}

.math-inline input {
    max-width: 200px;
}

.captcha-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 16px;
}

.captcha-status {
    font-size: 14px;
    color: var(--muted-color);
    min-height: 20px;
}

.captcha-status.success {
    color: var(--success-color);
}

.captcha-status.error {
    color: var(--danger-color);
}

/* Form elements */

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

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

input[type="email"],
input[type="text"],
textarea,
select {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 16px;
    transition: border-color 0.3s, box-shadow 0.3s, transform 0.2s;
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
    transform: translateY(-1px);
}

.helper-text {
    font-size: 13px;
    color: var(--muted-color);
    margin-top: 6px;
}

/* Checkbox list */

.checkbox-group {
    margin: 20px 0;
}

.checkbox-item {
    display: flex;
    align-items: center;
    margin-bottom: 12px;
    padding: 10px 12px;
    border-radius: 8px;
    transition: background-color 0.2s, box-shadow 0.2s;
    border: 1px solid transparent;
}

.checkbox-item:hover {
    background-color: #f7fafc;
    border-color: #e2e8f0;
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.05);
}

.checkbox-item input {
    margin-right: 10px;
    transform: scale(1.2);
}

/* Loading */

.loading {
    display: none;
    text-align: center;
    padding: 60px 20px;
}

.loading-spinner {
    border: 4px solid rgba(148, 163, 184, 0.2);
    border-top: 4px solid var(--accent-color);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    animation: spin 2s linear infinite;
    margin: 0 auto 15px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-dots:after {
    content: '';
    animation: dots 1.5s steps(5, end) infinite;
}

@keyframes dots {
    0%, 20% { content: '.'; }
    40% { content: '..'; }
    60%, 100% { content: '...'; }
}

/* Confirmation */

.confirmation {
    text-align: center;
    padding: 40px 20px;
    display: none;
}

.confirmation-icon {
    font-size: 64px;
    color: var(--success-color);
    margin-bottom: 20px;
}

/* Step indicator */

.step-indicator {
    display: flex;
    justify-content: space-between;
    margin-bottom: 34px;
    position: relative;
    gap: 12px;
    flex-wrap: wrap;
}

.progress-track {
    position: absolute;
    top: 15px;
    left: 0;
    right: 0;
    height: 2px;
    background-color: #e2e8f0;
    z-index: 1;
}

.progress-bar {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 0%;
    background: linear-gradient(120deg, var(--accent-color), var(--accent-alt));
    transition: width 0.35s ease;
}

.step-dot {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background-color: white;
    border: 2px solid #e2e8f0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    position: relative;
    z-index: 2;
    transition: all 0.3s;
    font-size: 14px;
}

.step-dot.active {
    border-color: var(--accent-color);
    background-color: var(--accent-color);
    color: white;
    box-shadow: 0 0 0 4px rgba(49, 130, 206, 0.2);
}

.step-dot.completed {
    border-color: var(--success-color);
    background-color: var(--success-color);
    color: white;
}

.step-label {
    position: absolute;
    top: 40px;
    left: 50%;
    transform: translateX(-50%);
    white-space: nowrap;
    font-size: 12px;
    color: var(--secondary-color);
}

/* Security notice */

.security-notice {
    background-color: #fffaf0;
    border-left: 4px solid var(--warning-color);
    padding: 15px;
    margin: 20px 0;
    border-radius: 6px;
    font-size: 14px;
}

/* Navigation buttons */

.navigation-buttons {
    display: flex;
    justify-content: space-between;
    margin-top: 30px;
}

/* Footer */

footer {
    text-align: center;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    color: var(--muted-color);
    font-size: 14px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 10px;
}

.footer-links a {
    color: #718096;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: var(--accent-color);
}

/* Errors */

.error-message {
    color: #e53e3e;
    font-size: 14px;
    margin-top: 5px;
    display: none;
}

.status-banner {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 18px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(148, 163, 184, 0.3);
    margin-bottom: 24px;
    backdrop-filter: blur(6px);
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--success-color);
    box-shadow: 0 0 0 6px rgba(34, 197, 94, 0.15);
}

.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.45);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    z-index: 50;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-backdrop.visible {
    opacity: 1;
    pointer-events: auto;
}

.modal {
    background: white;
    border-radius: 20px;
    padding: clamp(24px, 5vw, 40px);
    width: min(420px, 90vw);
    box-shadow: 0 40px 80px rgba(15, 23, 42, 0.3);
    position: relative;
    text-align: left;
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: transparent;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--muted-color);
}

.modal-close:hover {
    color: var(--primary-color);
}

.modal h3 {
    margin-top: 0;
    margin-bottom: 12px;
}

.modal p {
    margin-bottom: 20px;
}

.secondary-card .card-columns {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    align-items: center;
}

.secondary-card .metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
}

.secondary-card .metrics span {
    font-size: 13px;
    color: var(--muted-color);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.secondary-card .metrics strong {
    font-size: 22px;
    color: var(--primary-color);
}

.support-card {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 24px;
    align-items: center;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.07), rgba(59, 130, 246, 0.08));
}

.support-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.support-actions .btn {
    flex: 1 1 180px;
    text-align: center;
}

/* Responsive */

@media (max-width: 600px) {
    .container {
        padding: 15px;
    }
    
    .card {
        padding: 20px;
    }
    
    .trust-signals {
        flex-direction: column;
        gap: 15px;
    }
    
    .step-indicator {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .step-label {
        position: static;
        transform: none;
        margin-top: 5px;
    }
    
    .navigation-buttons {
        flex-direction: column;
        gap: 10px;
    }
    
    .navigation-buttons .btn {
        width: 100%;
    }

    .hero-meta {
        grid-template-columns: 1fr;
    }

    .support-card {
        flex-direction: column;
        align-items: flex-start;
    }

    .captcha-grid {
        grid-template-columns: 1fr;
    }

    .captcha-actions {
        flex-direction: column;
    }

    .captcha-actions .btn {
        width: 100%;
    }
}