/* ModelWork — лендинг «модель». Тёмная тема, синие акценты. */

:root {
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --bg-header: #0f172a;
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --accent: #3b82f6;
    --accent-light: #60a5fa;
    --accent-purple: #8b5cf6;
    --border: rgba(148, 163, 184, 0.2);
    --glow: rgba(59, 130, 246, 0.35);
    --radius: 16px;
    --radius-lg: 24px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-dark);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--bg-header);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.nav {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    font-size: 0.95rem;
    transition: color 0.2s, background 0.2s;
}

.nav-link:hover {
    color: var(--text);
    background: rgba(255, 255, 255, 0.05);
}

.nav-link--active {
    color: var(--accent-light);
    position: relative;
}

.nav-link--active::after {
    content: '';
    position: absolute;
    left: 0.75rem;
    right: 0.75rem;
    bottom: 0.25rem;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--accent-purple));
    border-radius: 1px;
    box-shadow: 0 0 8px var(--glow);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1.25rem;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-purple));
    color: #fff;
    box-shadow: 0 4px 14px var(--glow);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px var(--glow);
}

.btn-secondary {
    background: rgba(59, 130, 246, 0.15);
    color: var(--accent-light);
    border: 1px solid rgba(59, 130, 246, 0.3);
}

.btn-secondary:hover {
    background: rgba(59, 130, 246, 0.25);
    transform: translateY(-1px);
}

.btn--wide {
    width: 100%;
    padding: 0.85rem 1.5rem;
}

/* Mobile menu toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    color: var(--text);
    cursor: pointer;
    padding: 0.5rem;
}

.menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: currentColor;
    border-radius: 1px;
}

.mobile-menu {
    display: none;
    flex-direction: column;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    background: var(--bg-card);
    border-top: 1px solid var(--border);
}

.mobile-menu .nav-link,
.mobile-menu .btn {
    width: 100%;
    text-align: center;
}

@media (max-width: 900px) {
    .nav,
    .header-actions {
        display: none;
    }
    .menu-toggle {
        display: flex;
    }
    .mobile-menu.is-open {
        display: flex;
    }
}

/* Main content — offset for fixed header */
main {
    padding-top: 72px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.container--narrow {
    max-width: 640px;
}

/* Sections */
.section {
    padding: 4rem 0;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2.5rem;
    color: var(--text);
    letter-spacing: -0.02em;
}

/* Почему выбирают нас */
.section--why {
    background: var(--bg-dark);
}

.cards-grid {
    display: grid;
    gap: 1.5rem;
}

.cards-grid--6 {
    grid-template-columns: repeat(3, 1fr);
}

.cards-grid--4 {
    grid-template-columns: repeat(4, 1fr);
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.card:hover {
    border-color: rgba(59, 130, 246, 0.4);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.card-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
    line-height: 1;
}

.card-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.card-text {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* Наши преимущества — полоса потемнее */
.section--advantages {
    background: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

/* Как начать работать — шаги */
.section--steps {
    background: var(--bg-dark);
}

.steps-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.step {
    text-align: center;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem 1.5rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.step:hover {
    border-color: rgba(59, 130, 246, 0.4);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.step-num {
    width: 48px;
    height: 48px;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent), var(--accent-purple));
    color: #fff;
    font-size: 1.25rem;
    font-weight: 700;
    border-radius: 50%;
    box-shadow: 0 4px 12px var(--glow);
}

.step-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.step-text {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* Форма заявки */
.section--form {
    background: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
    border-top: 1px solid var(--border);
}

.application-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-label {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.required {
    color: #f87171;
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s;
}

.form-input::placeholder {
    color: var(--text-muted);
    opacity: 0.8;
}

.form-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 2.5rem;
}

.form-actions {
    margin-top: 0.5rem;
}

/* Footer */
.footer {
    padding: 2rem 0;
    border-top: 1px solid var(--border);
    text-align: center;
    background: var(--bg-header);
}

.footer-text,
.footer-link-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.footer-link {
    color: var(--accent-light);
    text-decoration: none;
}

.footer-link:hover {
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 1024px) {
    .cards-grid--6 {
        grid-template-columns: repeat(2, 1fr);
    }
    .cards-grid--4 {
        grid-template-columns: repeat(2, 1fr);
    }
    .steps-row {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .cards-grid--6,
    .cards-grid--4 {
        grid-template-columns: 1fr;
    }
    .steps-row {
        grid-template-columns: 1fr;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
    .section-title {
        font-size: 1.5rem;
    }
}