/* ===== VARIABLES ===== */
:root {
    --primary-color: #000000;
    --secondary-color: #ff6b35;
    --accent-color: #ff8c00;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --info-color: #3498db;
    --light-bg: #0a0a0a;
    --dark-bg: #000000;
    --text-dark: #e0e0e0;
    --text-light: #ffffff;
    --surface: #1a1a1a;
    --surface-dark: #0f0f0f;
    --border: #333333;
    --border-dark: #262626;
    --border-radius: 8px;
    --box-shadow: 0 4px 20px rgba(255, 107, 53, 0.15);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== BASE STYLES ===== */
body {
    font-family: 'SF Pro Display', 'Inter', system-ui, sans-serif;
    background: radial-gradient(circle at 20% 80%, rgba(255, 107, 53, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(255, 140, 0, 0.08) 0%, transparent 50%),
                linear-gradient(135deg, #000000 0%, #0a0a0a 50%, #1a1a1a 100%);
    min-height: 100vh;
    color: var(--text-dark);
    line-height: 1.6;
}

.container { max-width: 1400px; }
main { min-height: calc(100vh - 200px); }

/* ===== TYPOGRAPHY ===== */
h1 {
    color: var(--text-light);
    font-weight: 800;
    margin-bottom: 2rem;
    font-size: 2.5rem;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2, h3, h4, h5, h6 {
    color: var(--text-light);
    font-weight: 700;
    letter-spacing: -0.01em;
}

.text-gradient {
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-light { color: #e9ecef !important; }
.text-muted { color: #8b96a0 !important; }

/* ===== NAVBAR ===== */
.navbar {
    background: rgba(0, 0, 0, 0.95) !important;
    backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(255, 107, 53, 0.2);
    padding: 1rem 0;
    border-bottom: 1px solid var(--border);
}

.navbar-brand {
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--text-light) !important;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-link {
    color: var(--text-dark) !important;
    font-weight: 600;
    transition: var(--transition);
    border-radius: 6px;
    padding: 0.75rem 1.25rem !important;
    margin: 0 0.25rem;
    font-size: 0.95rem;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--secondary-color);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-link:hover::after { width: 80%; }
.nav-link:hover {
    color: var(--secondary-color) !important;
    transform: translateY(-1px);
}

/* ===== BUTTONS ===== */
.btn {
    border-radius: 6px;
    font-weight: 700;
    padding: 0.75rem 1.5rem;
    transition: var(--transition);
    border: 2px solid transparent;
    font-size: 0.9rem;
    letter-spacing: -0.01em;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.6s;
}

.btn:hover::before { left: 100%; }

.btn-primary, .btn-primary-gradient {
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    border-color: transparent;
    color: var(--text-light);
}

.btn-primary:hover, .btn-primary-gradient:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 107, 53, 0.3);
}

.btn-outline-primary {
    border: 2px solid var(--secondary-color);
    color: var(--secondary-color);
    background: transparent;
}

.btn-outline-primary:hover {
    background: var(--secondary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 107, 53, 0.2);
    border-color: var(--secondary-color);
}

.btn-info {
    background: linear-gradient(135deg, var(--info-color), #2980b9);
    border-color: transparent;
    color: var(--text-light);
}

.btn-info:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.3);
}

.btn-outline-info {
    border: 2px solid var(--info-color);
    color: var(--info-color);
    background: transparent;
}

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

.btn-outline-warning {
    border: 2px solid var(--warning-color);
    color: var(--warning-color);
    background: transparent;
}

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

.btn-outline-purple {
    color: #6f42c1;
    border-color: #6f42c1;
}

.btn-outline-purple:hover {
    background-color: #6f42c1;
    color: white;
}

/* ===== CARDS ===== */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    background: var(--surface);
    border: 1px solid var(--border);
    overflow: hidden;
    position: relative;
    height: 100%;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--secondary-color), var(--accent-color));
    transform: scaleX(0);
    transition: transform 0.4s ease;
    z-index: 2;
}

.card:hover::before {
    transform: scaleX(1);
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: 0 15px 35px rgba(255, 107, 53, 0.25);
    border-color: var(--secondary-color);
}

.card-header {
    background: linear-gradient(135deg, #1a1a1a, #262626);
    color: var(--text-light);
    border-radius: 0 !important;
    border: none;
    border-bottom: 1px solid var(--border);
    padding: 1.25rem 1.5rem;
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -0.01em;
}

.card-body {
    padding: 1.25rem;
    background: var(--surface);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.card-footer {
    background: var(--surface-dark);
    border-top: 1px solid var(--border);
    padding: 1rem 1.25rem;
    margin-top: auto;
}

/* ===== BADGES ===== */
.badge {
    border-radius: 12px;
    font-weight: 700;
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
    border: 1px solid transparent;
    letter-spacing: -0.01em;
    transition: var(--transition);
}

/* Background colors */
.bg-secondary { background: #404040 !important; color: var(--text-light); }
.bg-primary { background: linear-gradient(135deg, var(--secondary-color), var(--accent-color)) !important; color: var(--text-light); }
.bg-success { background: var(--success-color) !important; color: var(--text-light); }
.bg-warning { background: var(--warning-color) !important; color: var(--primary-color); }
.bg-info { background: var(--info-color) !important; color: var(--text-light); }
.bg-dark { background-color: #1a1a2e !important; color: white; }
.bg-purple { background: linear-gradient(135deg, #6f42c1, #8e44ad) !important; color: white; }
.bg-pink { background: linear-gradient(135deg, #e84393, #fd79a8) !important; color: white; }
.bg-orange { background: linear-gradient(135deg, #e67e22, #f39c12) !important; color: white; }

/* ===== FORMS ===== */
.form-control, .form-select {
    border-radius: 6px;
    border: 1px solid var(--border);
    padding: 0.875rem 1rem;
    transition: var(--transition);
    font-size: 0.9rem;
    background: var(--surface-dark);
    color: var(--text-light);
}

.form-control::placeholder {
    color: #aaa;
    opacity: 0.8;
}

.form-control:focus, .form-select:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 2px rgba(255, 107, 53, 0.1);
    outline: none;
    background: var(--surface);
    color: var(--text-light);
}

.form-control:-webkit-autofill {
    -webkit-text-fill-color: var(--text-light) !important;
    -webkit-box-shadow: 0 0 0px 1000px var(--surface-dark) inset !important;
    border: 1px solid var(--secondary-color) !important;
}

.form-control:-webkit-autofill:focus {
    -webkit-box-shadow: 0 0 0px 1000px var(--surface) inset !important;
}

.form-check-input {
    cursor: pointer;
    width: 1.1em;
    height: 1.1em;
    margin-right: 0.75rem;
    margin-top: 0.15em;
    border: 2px solid var(--border);
    background: var(--surface-dark);
    transition: var(--transition);
}

.form-check-input:checked {
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    border-color: var(--secondary-color);
}

.form-check-input:focus {
    box-shadow: 0 0 0 2px rgba(255, 107, 53, 0.1);
    border-color: var(--secondary-color);
}

.form-check-label {
    cursor: pointer;
    user-select: none;
    transition: var(--transition);
    font-size: 0.9rem;
    color: var(--text-dark);
    font-weight: 600;
    display: flex;
    align-items: center;
}

.form-check-input:checked + .form-check-label { color: var(--secondary-color); }

/* ===== FOOTER ===== */
footer {
    background: var(--dark-bg);
    color: var(--text-light);
    margin-top: 3rem;
    border-top: 1px solid var(--border);
    padding: 2rem 0;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInZoom {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

/* ===== UTILITIES ===== */
.loading {
    position: relative;
    pointer-events: none;
    opacity: 0.7;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    border: 2px solid var(--border);
    border-top: 2px solid var(--secondary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    width: 20px;
    height: 20px;
    margin-left: -10px;
    margin-top: -10px;
}

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

/* ===== CUSTOM SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--surface-dark); border-radius: 3px; }
::-webkit-scrollbar-thumb { background: var(--secondary-color); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-color); }

/* ===== RESPONSIVE ===== */
@media (max-width: 1200px) {
    h1 { font-size: 2.2rem; }
    .container { max-width: 100%; }
}

@media (max-width: 992px) {
    h1 { font-size: 2rem; }
    .container { padding: 0 1.5rem; }
    .nav-link { padding: 0.625rem 1rem !important; }
}

@media (max-width: 768px) {
    h1 { font-size: 1.8rem; text-align: center; }
    .container { padding: 0 1rem; }
    .nav-link { font-size: 0.85rem; }
    .btn { padding: 0.625rem 1.25rem; }
}

@media (max-width: 576px) {
    h1 { font-size: 1.6rem; }
    .navbar-brand { font-size: 1.3rem; }
    .btn { font-size: 0.85rem; }
    .badge { font-size: 0.75rem; padding: 0.4rem 0.8rem; }
}

/* Гарантируем, что плавающие элементы не перекрываются */
#sticky-apply-btn-container {
    position: fixed;
    z-index: 999999;
}

/* Убираем возможные конфликты с другими элементами */
.toggle-section, .toggle-subsection {
    position: relative;
    z-index: 1;
}

/* Предотвращаем всплытие событий на кнопку */
.apply-filters-sticky {
    pointer-events: auto !important;
    cursor: pointer !important;
}

/* Гарантируем, что hover эффекты не влияют на дочерние элементы */
.toggle-section > h6,
.toggle-subsection > .form-label {
    position: relative;
    z-index: 2;
}

.toggle-section > h6:hover,
.toggle-subsection > .form-label:hover {
    cursor: pointer;
    background: rgba(255, 107, 53, 0.05);
}

/* Убедитесь, что содержимое секций не перехватывает события мыши */
#search-filters-content,
#similarity-filters-content,
[id$="-content"] {
    pointer-events: auto;
}