/* PT Sans (Переводы/пояснения) */
@font-face {
    font-family: 'PTSans-Regular';
    src: url('../assets/fonts/PTSans-Regular.ttf') format('truetype');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: 'PTSans-Bold';
    src: url('../assets/fonts/PTSans-Bold.ttf') format('truetype');
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

/* --- VARIABLES & RESET --- */
:root {
    
    --loading-gradient: linear-gradient(135deg, #FFB74D 0%, #FF9800 30%, #FFB74D 60%, #FF9800 100%);

    /* Light theme (default) */
    --bg-app: #FFF9EC;
    --bg-card: #FFFFFF;
    --bg-gray-light: #F5E6C8;
    --bg-gray-dark: #D4A017;
    --text-main: #2C2C2E;
    --text-sub: #8B7355;
    --accent-red: #FF9500;
    --radius-xl: 20px;
    --radius-md: 14px;
    --radius-sm: 10px;
    --shadow-soft: 0 4px 20px rgba(255, 149, 0, 0.06);
    --shadow-hover: 0 8px 30px rgba(255, 149, 0, 0.12);
    --anim-speed: 0.4s;
    --anim-curve: cubic-bezier(0.25, 0.8, 0.25, 1);
    --nav-bg: rgba(255, 255, 255, 0.85);
    --nav-border: rgba(0,0,0,0.05);
    --search-bg: var(--bg-card);
    --tab-bg: rgba(255,255,255,0.5);
    --avatar-bg: #FFF3E0;
    --avatar-color: #FF9800;
    --hskk-bg: rgba(255, 149, 0, 0.1);
    --filter-border: var(--accent-red);
    --filter-color: var(--accent-red);
    --filter-hover: rgba(255, 149, 0, 0.05);
    --filter-active: rgba(255, 149, 0, 0.1);

    --progress-font: "PTSans-Bold";
}

/* Dark theme variables */
[data-theme="dark"] {

    --loading-gradient: linear-gradient(135deg, #1C1C1E 0%, #2C2C2E 30%, #1C1C1E 60%, #2C2C2E 100%);

    --bg-app: #1C1C1E;
    --bg-card: #2C2C2E;
    --bg-gray-light: #3A3A3C;
    --bg-gray-dark: #48484A;
    --text-main: #F5F5F7;
    --text-sub: #AEAEB2;
    --accent-red: #FF9F0A;
    --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.5);
    --nav-bg: rgba(44, 44, 46, 0.85);
    --nav-border: rgba(255,255,255,0.1);
    --search-bg: var(--bg-card);
    --tab-bg: rgba(44,44,46,0.5);
    --avatar-bg: #3A3A3C;
    --avatar-color: #FF9F0A;
    --hskk-bg: rgba(255, 159, 10, 0.15);
    --filter-border: var(--accent-red);
    --filter-color: var(--accent-red);
    --filter-hover: rgba(255, 159, 10, 0.1);
    --filter-active: rgba(255, 159, 10, 0.2);
}


* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
    font-family: PTSans-Regular, -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--bg-app);
    color: var(--text-main);
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    max-width: 414px;
    margin: 0 auto;
    border-left: 1px solid var(--nav-border);
    border-right: 1px solid var(--nav-border);
    transition: background-color 0.3s var(--anim-curve), color 0.3s var(--anim-curve);
}

/* Smooth transitions for theme change */
.topic-card, .free-chat-card, .search-input, .filter-select,
.tabs, .bottom-nav, .avatar-box, .hskk-badge, header {
    transition: background-color 0.3s var(--anim-curve), 
                border-color 0.3s var(--anim-curve),
                box-shadow 0.3s var(--anim-curve),
                color 0.3s var(--anim-curve);
}

/* --- HEADER & ANIMATED SEARCH --- */
header {
    background: var(--bg-app);
    padding: 12px 16px 0 16px;
    padding-top: max(12px, env(safe-area-inset-top));
    z-index: 20;
    transition: background-color 0.3s var(--anim-curve);
}

/* === HEADER & PROGRESS BAR === */
header { background: var(--bg-app); padding: 16px 16px 0 16px; padding-top: max(16px, env(safe-area-inset-top)); z-index: 20; }

.progress-bar-wrapper {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 15px;
}

.progress-item {
    background: #FCAF37;
    padding: 8px 8px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: inherit;
    gap: 15%;
    box-shadow: var(--shadow-soft);
    transition: transform 0.2s, background-color 0.3s;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.progress-item:active { transform: scale(0.96); }

/* Иконки внутри прогресса */
.progress-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 149, 0, 0.1);
    color: var(--accent-red);
    transition: 0.3s;
}

.progress-icon svg { width: 14px; height: 14px; fill: currentColor; }

.progress-text {
    font-size: 15px;
    font-weight: 1000;
    color: #FFF;
    white-space: nowrap;
    font-family: var(--progress-font);
}

/* Стиль для PRO подписки */
.progress-item.pro-style {
    background: linear-gradient(135deg, #8000FF, #FFB74D);
}
/* Стиль для PRO подписки */
.progress-item.start-style {
    background: linear-gradient(135deg, #8000FF, #FFB74D);
}
.progress-item.pro-style .progress-icon { background: rgba(255,255,255,0.2); color: white; }
.progress-item.pro-style .progress-text, 
.progress-item.pro-style .progress-label { color: white; }
.search-row {
    display: flex;
    align-items: center;
    margin-bottom: 16px;
    height: 44px;
    gap: 2%;
}

.search-wrapper {
    position: relative;
    flex: 1;
    transition: flex 0.4s var(--anim-curve);
    height: 100%;
}

.search-input {
    width: 102%;
    height: 100%;
    background: var(--search-bg);
    border: none;
    padding: 0 12px 0 40px;
    border-radius: var(--radius-xl);
    font-size: 15px;
    color: var(--text-main);
    box-shadow: var(--shadow-soft);
    outline: none;
    transition: all 0.3s ease;
}

.search-input:focus {
    box-shadow: 0 4px 12px rgba(255, 149, 0, 0.15);
}

.search-input::placeholder {
    color: var(--text-sub);
}

.search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-sub);
    width: 18px;
    height: 18px;
    transition: color 0.3s var(--anim-curve);
}

/* Filter Dropdown */
.filter-wrapper {
    width: 0;
    opacity: 0;
    overflow: hidden;
    transition: all 0.4s var(--anim-curve);
    height: 100%;
}

.filter-wrapper.active {
    width: 35%;
    opacity: 1;
    margin-left: 2%;
}

.filter-select {
    width: 100%;
    height: 100%;
    background: transparent;
    border: 1px solid var(--filter-border);
    border-radius: var(--radius-xl);
    padding: 0 25px 0 12px;
    font-size: 12px;
    font-weight: 700;
    color: var(--filter-color);
    outline: none;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%23FF9500%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 10px;
    transition: all 0.2s ease;
}

.filter-select:hover { background-color: var(--filter-hover); }
.filter-select:active { background-color: var(--filter-active); }

/* --- TABS --- */
.tabs {
    display: flex;
    background: var(--tab-bg);
    backdrop-filter: blur(10px);
    padding: 4px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.02);
    transition: background-color 0.3s var(--anim-curve);
}

.tab-btn {
    flex: 1;
    padding: 10px;
    border: none;
    background: transparent;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-sub);
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn.active {
    background-color: var(--bg-gray-dark);
    color: white;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

/* --- MAIN CONTENT --- */
main {
    flex: 1;
    overflow-y: auto;
    padding: 0 16px 100px 16px;
    -webkit-overflow-scrolling: touch;
}

/* Free Chat Card */
.free-chat-card {
    background: linear-gradient(135deg, #FFB74D, #FF9800);
    color: white;
    padding: 24px;
    border-radius: var(--radius-xl);
    text-align: center;
    margin-bottom: 24px;
    font-weight: 700;
    font-size: 17px;
    letter-spacing: 0.5px;
    box-shadow: 0 10px 30px rgba(255, 152, 0, 0.2);
    cursor: pointer;
    transition: transform 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.free-chat-card:active {
    transform: scale(0.98);
}

/* Topic List */
.topic-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.topic-card {
    display: flex;
    align-items: center;
    padding: 16px;
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-soft);
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s, background-color 0.3s var(--anim-curve);
    animation: slideUp 0.4s var(--anim-curve);
}

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

.topic-card:active {
    transform: scale(0.98);
}

/* Minimalist Icon Placeholder */
.avatar-box {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    background-color: var(--avatar-bg);
    margin-right: 16px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--avatar-color);
    transition: background-color 0.3s var(--anim-curve), color 0.3s var(--anim-curve);
}

.avatar-box svg {
    width: 28px;
    height: 28px;
    fill: currentColor;
}

.card-info {
    flex: 1;
}

.topic-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-main);
    transition: color 0.3s var(--anim-curve);
}

.topic-desc {
    font-size: 13px;
    color: var(--text-sub);
    transition: color 0.3s var(--anim-curve);
}

.hskk-badge {
    background-color: var(--hskk-bg);
    color: var(--accent-red);
    padding: 6px 10px;
    border-radius: 8px;
    font-size: 11px;
    font-weight: 700;
    margin-left: 12px;
    letter-spacing: 0.5px;
    transition: background-color 0.3s var(--anim-curve), color 0.3s var(--anim-curve);
}

.no-results {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-sub);
    font-size: 15px;
    display: none;
    transition: color 0.3s var(--anim-curve);
}

/* --- BOTTOM NAVIGATION --- */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 414px;
    background: var(--nav-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    display: flex;
    justify-content: space-around;
    padding: 12px 0;
    padding-bottom: max(12px, env(safe-area-inset-bottom));
    border-top: 1px solid var(--nav-border);
    z-index: 100;
    transition: background-color 0.3s var(--anim-curve), border-color 0.3s var(--anim-curve);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--text-sub);
    font-size: 11px;
    font-weight: 500;
    gap: 6px;
    flex: 1;
    padding: 4px 0;
    transition: color 0.3s;
}

.nav-item.active {
    color: var(--text-main);
}

.nav-icon {
    width: 24px;
    height: 24px;
    fill: currentColor;
    transition: transform 0.2s;
}

.nav-item:active .nav-icon {
    transform: scale(0.9);
}

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

.hidden {
    display: none !important;
}

.loading {
    text-align: center;
    padding: 40px;
    color: var(--text-sub);
    transition: color 0.3s var(--anim-curve);
}

/* --- SCROLLBAR --- */
::-webkit-scrollbar {
    width: 4px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--bg-gray-dark);
    border-radius: 2px;
    transition: background-color 0.3s var(--anim-curve);
}