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

:root {
    --bg: #0f1720;
    --sidebar: #121e2d;
    --panel: #141c24;
    --panel-2: #172334;
    --border: #2c3b52;
    --text: #cdd7e8;
    --muted: #8fa2bd;
    --white: #ffffff;
    --grad-1: #1e385e;
    --grad-2: #5e1d96;
    --grad-3: #8921aa;
    --shadow: 0 18px 45px rgba(0, 0, 0, .35);
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background: radial-gradient(circle at top left, #172334 0, var(--bg) 45%, #0b1017 100%);
    color: var(--text);
    min-height: 100vh;
}

a {
    color: inherit;
    text-decoration: none;
}

.app {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 280px;
    background: linear-gradient(180deg, #121e2d 0%, #0f1720 100%);
    border-right: 1px solid var(--border);
    padding: 18px;
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 50;
    transition: transform .25s ease, width .25s ease;
    overflow-y: auto;
}

.brand-box {
    display: flex;
    gap: 12px;
    align-items: center;
    padding: 10px;
    border-radius: 16px;
    background: rgba(255,255,255,.04);
    border: 1px solid rgba(255,255,255,.07);
}

.brand-logo {
    width: 46px;
    height: 46px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    color: var(--white);
    font-weight: 900;
    font-size: 24px;
    background: linear-gradient(135deg, var(--grad-1), var(--grad-3));
    box-shadow: 0 10px 24px rgba(137,33,170,.25);
}

.brand-box span,
.user-box span {
    display: block;
    color: var(--muted);
    font-size: 12px;
    margin-top: 4px;
}

.user-box {
    margin-top: 18px;
    display: flex;
    gap: 12px;
    align-items: center;
    padding: 14px;
    border-radius: 18px;
    background: var(--panel);
    border: 1px solid rgba(255,255,255,.07);
}

.avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-weight: 800;
    background: #1c2c44;
    color: var(--white);
    border: 1px solid var(--border);
}

.side-nav {
    margin-top: 18px;
    display: grid;
    gap: 8px;
}

.side-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 13px 14px;
    border-radius: 14px;
    color: var(--text);
    transition: .2s ease;
    border: 1px solid transparent;
}

.side-nav a:hover {
    background: rgba(255,255,255,.06);
    border-color: rgba(255,255,255,.08);
    transform: translateX(3px);
}

.nav-icon {
    width: 26px;
    text-align: center;
}

.main-content {
    margin-left: 280px;
    width: calc(100% - 280px);
    padding: 22px;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    background: linear-gradient(135deg, var(--grad-1), var(--grad-2), var(--grad-3));
    border-radius: 22px;
    padding: 18px;
    box-shadow: var(--shadow);
}

.topbar h1 {
    color: var(--white);
    font-size: 24px;
}

.topbar p {
    color: rgba(255,255,255,.72);
    margin-top: 4px;
}

.sidebar-toggle {
    border: 0;
    background: rgba(255,255,255,.12);
    color: var(--white);
    border-radius: 12px;
    width: 44px;
    height: 44px;
    cursor: pointer;
    font-size: 22px;
}

.language-form select {
    background: #101a27;
    color: var(--white);
    border: 1px solid rgba(255,255,255,.15);
    padding: 11px 12px;
    border-radius: 12px;
    outline: none;
}

.hero-card,
.panel,
.stat-card {
    background: rgba(20, 28, 36, .94);
    border: 1px solid rgba(255,255,255,.07);
    box-shadow: var(--shadow);
}

.hero-card {
    margin-top: 22px;
    border-radius: 24px;
    padding: 28px;
}

.badge {
    display: inline-flex;
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(137,33,170,.18);
    color: #d9b8ff;
    border: 1px solid rgba(137,33,170,.35);
    margin-bottom: 14px;
}

.hero-card h2 {
    color: var(--white);
    font-size: clamp(26px, 4vw, 40px);
    margin-bottom: 10px;
}

.hero-card p {
    color: var(--muted);
    max-width: 760px;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
    margin-top: 22px;
}

.stat-card {
    border-radius: 20px;
    padding: 20px;
}

.card-icon {
    font-size: 28px;
    margin-bottom: 12px;
}

.stat-card h3 {
    color: var(--muted);
    font-size: 14px;
    margin-bottom: 8px;
}

.stat-card strong {
    display: block;
    color: var(--white);
    font-size: 28px;
    margin-bottom: 6px;
}

.stat-card span {
    color: var(--muted);
    font-size: 13px;
}

.panel {
    margin-top: 22px;
    border-radius: 22px;
    padding: 24px;
}

.panel h2 {
    color: var(--white);
    margin-bottom: 10px;
}

.panel p {
    color: var(--muted);
}

.actions-row {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 18px;
}

.btn-primary,
.btn-secondary {
    padding: 12px 16px;
    border-radius: 14px;
    font-weight: 700;
}

.btn-primary {
    background: linear-gradient(135deg, var(--grad-1), var(--grad-3));
    color: var(--white);
}

.btn-secondary {
    background: rgba(255,255,255,.06);
    color: var(--text);
    border: 1px solid rgba(255,255,255,.1);
}

body.sidebar-collapsed .sidebar {
    transform: translateX(-100%);
}

body.sidebar-collapsed .main-content {
    margin-left: 0;
    width: 100%;
}

@media (max-width: 1100px) {
    .cards-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 760px) {
    .sidebar {
        transform: translateX(-100%);
        width: 280px;
    }

    body.sidebar-open .sidebar {
        transform: translateX(0);
    }

    body.sidebar-collapsed .sidebar {
        transform: translateX(-100%);
    }

    .main-content {
        margin-left: 0;
        width: 100%;
        padding: 14px;
    }

    .topbar {
        align-items: flex-start;
        flex-wrap: wrap;
    }

    .language-form {
        width: 100%;
    }

    .language-form select {
        width: 100%;
    }

    .cards-grid {
        grid-template-columns: 1fr;
    }
}