/* === COMPONENTS.CSS === */
/* assets/css/components.css */
/* НАЗНАЧЕНИЕ: Кнопки, карточки, формы, бейджи, навигация */
/* РАЗМЕР: ~420 строк */

/* --- Кнопки --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--gap-sm);
    padding: 14px 32px;
    font-family: var(--font-display);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    line-height: 1;
    white-space: nowrap;
    min-height: 52px;
}

.btn-primary {
    background: var(--gradient-primary, var(--color-accent));
    background-color: var(--color-accent);
    color: var(--bg-primary);
    border-color: var(--color-accent);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    filter: brightness(1.1);
    color: var(--bg-primary);
}

.btn-outline {
    background: transparent;
    color: var(--color-accent);
    border-color: var(--color-accent);
}

.btn-outline:hover {
    background: var(--color-accent);
    color: var(--bg-primary);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 18px 40px;
    font-size: 1rem;
    min-height: 60px;
}

.btn-sm {
    padding: 10px 20px;
    font-size: var(--font-size-xs);
    min-height: 40px;
}

.btn-block {
    width: 100%;
}

.btn:disabled, .btn.loading {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn .spinner {
    width: 18px;
    height: 18px;
    border: 2px solid currentColor;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

/* --- Карточки --- */
.card {
    background: var(--gradient-card, var(--bg-card));
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: clamp(24px, 3vw, 32px);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.card:hover {
    background-color: var(--bg-card-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius);
    background: var(--color-accent-subtle);
    color: var(--color-accent);
    margin-bottom: var(--gap-md);
}

.card-icon i, .card-icon svg {
    width: 24px;
    height: 24px;
}

.card h3 {
    font-size: var(--font-size-h3);
    margin-bottom: var(--gap-sm);
}

.card p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* --- Формы --- */
.form-group {
    margin-bottom: var(--gap-md);
    position: relative;
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--gap-xs);
}

.form-input {
    width: 100%;
    padding: 14px 16px;
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--text-primary);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
    outline: none;
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-input:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

.form-input.error {
    border-color: var(--color-danger);
}

.form-error {
    font-size: var(--font-size-xs);
    color: var(--color-danger);
    margin-top: var(--gap-xs);
    display: none;
}

.form-error.visible {
    display: block;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--gap-md);
}

@media (max-width: 480px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* --- Навигация (Header) --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transition: background-color var(--transition-base);
}

.header-inner {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 clamp(16px, 4vw, 40px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--gap-sm);
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: var(--gradient-primary, var(--color-accent));
    background-color: var(--color-accent);
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-primary);
    font-weight: 700;
    font-size: var(--font-size-sm);
}

.nav-links {
    display: flex;
    gap: var(--gap-lg);
    align-items: center;
}

.nav-link {
    font-family: var(--font-display);
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: var(--gap-sm) 0;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-accent);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-accent);
    border-radius: 1px;
}

/* Theme switcher */
.theme-switcher {
    display: flex;
    gap: 2px;
    padding: 3px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-pill);
    border: 1px solid var(--border-color);
}

.theme-btn {
    padding: 6px 12px;
    font-family: var(--font-display);
    font-size: 11px;
    font-weight: 500;
    color: var(--text-muted);
    background: transparent;
    border: none;
    border-radius: var(--border-radius-pill);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.theme-btn:hover {
    color: var(--text-primary);
}

.theme-btn.active {
    background: var(--color-accent);
    color: var(--bg-primary);
}

/* Mobile menu */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: var(--gap-sm);
}

.mobile-menu-btn svg {
    width: 24px;
    height: 24px;
}

@media (max-width: 768px) {
    .mobile-menu-btn { display: flex; }

    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        border-bottom: 1px solid var(--border-color);
        flex-direction: column;
        padding: var(--gap-lg);
        gap: var(--gap-md);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition-base);
    }

    .nav-links.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .theme-switcher {
        width: 100%;
        justify-content: center;
    }
}

/* --- Footer --- */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--gap-xl) 0 var(--gap-lg);
}

.footer-links {
    display: flex;
    gap: var(--gap-lg);
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: var(--gap-lg);
}

.footer-link {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

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

.footer-disclaimer {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.6;
}

/* --- Hero --- */
.hero {
    padding-top: calc(70px + clamp(60px, 10vw, 120px));
    padding-bottom: clamp(60px, 10vw, 120px);
    text-align: center;
    position: relative;
}

.hero h1 {
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.hero .lead {
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* --- Badge --- */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--gap-xs);
    padding: 4px 12px;
    font-family: var(--font-display);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-radius: var(--border-radius-pill);
    background: var(--color-accent-subtle);
    color: var(--color-accent);
    border: 1px solid var(--color-accent);
}

/* --- Steps --- */
.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--gap-xl);
    counter-reset: step;
}

.step {
    position: relative;
    counter-increment: step;
    text-align: center;
}

.step::before {
    content: counter(step);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    margin: 0 auto var(--gap-md);
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-accent);
    border: 2px solid var(--color-accent);
    border-radius: 50%;
    background: var(--color-accent-subtle);
}

@media (max-width: 768px) {
    .steps {
        grid-template-columns: 1fr;
        gap: var(--gap-lg);
    }
}

/* --- FAQ Accordion --- */
.faq-item {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    margin-bottom: var(--gap-sm);
    overflow: hidden;
    transition: border-color var(--transition-fast);
}

.faq-item.active {
    border-color: var(--color-accent);
}

.faq-question {
    width: 100%;
    padding: var(--gap-md) var(--gap-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-family: var(--font-display);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
    background: var(--bg-card);
    border: none;
    cursor: pointer;
    text-align: left;
    transition: all var(--transition-fast);
}

.faq-question:hover {
    background: var(--bg-card-hover);
}

.faq-icon {
    width: 20px;
    height: 20px;
    transition: transform var(--transition-base);
    flex-shrink: 0;
    color: var(--color-accent);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-answer-inner {
    padding: 0 var(--gap-lg) var(--gap-lg);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.7;
}

/* --- Table (Highlights) --- */
.highlights-table {
    width: 100%;
    border-collapse: collapse;
}

.highlights-table th,
.highlights-table td {
    padding: var(--gap-md) var(--gap-lg);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.highlights-table th {
    font-family: var(--font-display);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-accent);
    white-space: nowrap;
    width: 30%;
}

.highlights-table td {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.highlights-table tr:hover td {
    background: var(--color-accent-subtle);
}

@media (max-width: 768px) {
    .highlights-table th,
    .highlights-table td {
        padding: var(--gap-sm) var(--gap-md);
        font-size: var(--font-size-xs);
    }
}

/* --- Spinner keyframe --- */
@keyframes spin {
    to { transform: rotate(360deg); }
}

/* --- Page content transition --- */
#page-content {
    transition: opacity var(--transition-fast);
    min-height: calc(100vh - 70px);
}

#page-content.loading {
    opacity: 0.4;
}