/* ===== VARIABLES & ROOT ===== */

:root {
    --accent: #8b5cf6;
    --accent-hover: #7c3aed;
    --accent-soft: rgba(139, 92, 246, 0.1);
    --slate-text: #64748b;
    --bg-light: #f1f5f9;
}

/* ===== BASE ===== */

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Montserrat", sans-serif;
    overflow-x: hidden;
    min-width: 320px;
    -webkit-tap-highlight-color: transparent;
    color: #1e293b;
}

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ===== UTILITIES ===== */

.bg-accent { background-color: var(--accent); }
.text-accent { color: var(--accent); }
.border-accent { border-color: var(--accent); }

/* ===== HERO ===== */

.hero-gradient {
    background: radial-gradient(circle at 70% 50%, #f7f5ff 0%, #ffffff 100%);
}

/* ===== MOBILE MENU ===== */

#mobile-menu {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    z-index: 50;
}

#mobile-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

/* ===== TABS SYSTEM ===== */

.tab-btn {
    transition: all 0.2s ease-in-out;
}

.active-tab {
    background-color: var(--accent);
    color: white;
    border-color: var(--accent);
    box-shadow: 0 10px 25px -5px rgba(139, 92, 246, 0.3);
}

.inactive-tab {
    background-color: white;
    color: var(--slate-text);
    border-color: #f1f5f9;
}

.inactive-tab:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-1px);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.4s ease-out forwards;
}

/* ===== SCROLLBARS ===== */

::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: #e2e8f0;
    border-radius: 10px;
}

.custom-scrollbar {
    scrollbar-width: thin;
    scrollbar-color: var(--accent) var(--bg-light);
}

.custom-scrollbar::-webkit-scrollbar {
    height: 6px;
}

.custom-scrollbar::-webkit-scrollbar-track {
    background: var(--bg-light);
    border-radius: 20px;
}

.custom-scrollbar::-webkit-scrollbar-thumb {
    background: var(--accent);
    border-radius: 20px;
}

/* ===== ANIMATIONS ===== */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== RESPONSIVE FIXES ===== */

@media (max-width: 768px) {
    .hero-gradient {
        background: #ffffff;
    }
}

@media (min-width: 768px) {
    p {
        line-height: 1.6;
    }
}

/* Фикс дерганья: Контейнер для вкладок */
.tabs-container {
    position: relative;
    min-height: 600px;
    display: grid;
    grid-template-columns: 1fr;
}

.tab-content {
    grid-column: 1;
    grid-row: 1;
    display: none;
    opacity: 0;
}

.tab-content.active {
    display: block;
    animation: fadeInTab 0.3s ease-out forwards;
}

@keyframes fadeInTab {
    from {
        opacity: 0;
        transform: translateY(5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.process-scroll {
    -webkit-overflow-scrolling: touch;
    scroll-behavior: smooth;
}

@media (max-width: 768px) {
    .tabs-container {
        min-height: auto;
    }
}