:root {
    --bg: #f0f2f5;
    --panel: #ffffff;
    --text: #1c1e21;
    --muted: #606770;
    --primary: #1877f2;
    --primary-strong: #0f5bce;
    --stroke: #d9dee7;
    --shadow: 0 10px 40px rgba(0, 0, 0, 0.06);
}

body.dark {
    --bg: #0f1117;
    --panel: #161925;
    --text: #e5e7ef;
    --muted: #9aa2b5;
    --primary: #4c8dff;
    --primary-strong: #76a9ff;
    --stroke: #22283a;
    --shadow: 0 10px 50px rgba(0, 0, 0, 0.35);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    transition: background 0.3s ease, color 0.3s ease;
}

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

header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: var(--panel);
    border-bottom: 1px solid var(--stroke);
    box-shadow: var(--shadow);
}

.navbar {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    gap: 16px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 18px;
    color: var(--primary);
}

.brand-badge {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary), var(--primary-strong));
    display: grid;
    place-items: center;
    color: #fff;
    font-weight: 800;
    letter-spacing: 0.5px;
}

.nav-links {
    display: flex;
    gap: 8px;
    align-items: center;
}

.nav-link {
    padding: 8px 12px;
    border-radius: 10px;
    border: 1px solid transparent;
    color: var(--muted);
    transition: all 0.2s ease;
}

.nav-link:hover {
    color: var(--primary);
    background: rgba(24, 119, 242, 0.08);
    border-color: rgba(24, 119, 242, 0.1);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.nav-user {
    color: var(--muted);
    font-weight: 600;
}

.mode-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 12px;
    border: 1px solid var(--stroke);
    background: var(--panel);
    color: var(--text);
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s ease;
}

.mode-toggle:hover {
    box-shadow: var(--shadow);
    border-color: rgba(24, 119, 242, 0.25);
}

.main {
    max-width: 1100px;
    margin: 24px auto 60px;
    padding: 0 20px;
    display: grid;
    gap: 20px;
}

.hero {
    background: var(--panel);
    border: 1px solid var(--stroke);
    border-radius: 18px;
    padding: 28px;
    box-shadow: var(--shadow);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    align-items: center;
}

.hero h1 {
    margin: 0 0 10px;
    font-size: 28px;
}

.hero p {
    margin: 0 0 18px;
    color: var(--muted);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 10px;
    border-radius: 10px;
    background: rgba(24, 119, 242, 0.1);
    color: var(--primary);
    font-weight: 700;
}

.cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 14px;
    border-radius: 12px;
    border: 1px solid transparent;
    cursor: pointer;
    font-weight: 700;
    transition: all 0.2s ease;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 8px 20px rgba(24, 119, 242, 0.25);
}

.btn-primary:hover {
    background: var(--primary-strong);
}

.btn-ghost {
    background: transparent;
    color: var(--primary);
    border-color: rgba(24, 119, 242, 0.2);
}

.btn-ghost:hover {
    background: rgba(24, 119, 242, 0.08);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
}

.card {
    background: var(--panel);
    border: 1px solid var(--stroke);
    border-radius: 16px;
    padding: 18px;
    box-shadow: var(--shadow);
    display: grid;
    gap: 10px;
}

.card h3 {
    margin: 0;
    font-size: 18px;
}

.card p {
    margin: 0;
    color: var(--muted);
}

.status {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--muted);
    font-weight: 600;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 999px;
    background: #44c767;
    box-shadow: 0 0 0 4px rgba(68, 199, 103, 0.2);
}

.search-card {
    background: var(--panel);
    border: 1px solid var(--stroke);
    border-radius: 18px;
    padding: 20px;
    box-shadow: var(--shadow);
    display: grid;
    gap: 16px;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.search-form {
    display: grid;
    gap: 12px;
}

.filters {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
}

.field {
    display: grid;
    gap: 6px;
}

.field label {
    font-weight: 600;
    color: var(--muted);
    font-size: 14px;
}

.field input,
.field select {
    width: 100%;
    padding: 10px 12px;
    border-radius: 12px;
    border: 1px solid var(--stroke);
    background: var(--panel);
    color: var(--text);
    transition: border 0.2s ease, box-shadow 0.2s ease;
}

.field input:focus,
.field select:focus {
    outline: none;
    border-color: rgba(24, 119, 242, 0.35);
    box-shadow: 0 0 0 4px rgba(24, 119, 242, 0.12);
}

.actions {
    display: flex;
    justify-content: flex-end;
}

.ads-section {
    display: grid;
    gap: 14px;
}

.ads-grid {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.ad-card {
    padding: 0;
    overflow: hidden;
}

.ad-card .thumb {
    display: block;
    width: 100%;
    height: 170px;
    overflow: hidden;
    border-bottom: 1px solid var(--stroke);
}

.ad-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.ad-card .card-body {
    padding: 14px 16px 16px;
    display: grid;
    gap: 6px;
}

.ad-card .price {
    font-weight: 800;
    color: var(--text);
    font-size: 18px;
}

.ad-card .meta {
    color: var(--muted);
    font-weight: 600;
}

.empty {
    background: var(--panel);
    border: 1px solid var(--stroke);
    border-radius: 16px;
    padding: 20px;
    color: var(--muted);
    text-align: center;
}

.footer {
    text-align: center;
    color: var(--muted);
    padding: 20px;
    font-size: 14px;
}

.footer-links {
    display: inline-flex;
    gap: 12px;
    margin-top: 8px;
}

@media (max-width: 640px) {
    .navbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .nav-links {
        width: 100%;
        flex-wrap: wrap;
    }
}