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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f0f2f5;
    color: #1a1a2e;
    line-height: 1.6;
    padding-bottom: 110px;
    min-height: 100vh;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px 40px;
}

/* Header */
.site-header {
    background: #3a3f4b;
    color: #fff;
    padding: 0 20px;
    margin-bottom: 32px;
    position: sticky;
    top: 0;
    z-index: 900;
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.2);
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
}

.logo {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.3px;
    flex-shrink: 0;
}

.logo-link {
    text-decoration: none;
    color: #fff;
    transition: opacity 0.2s;
}

.logo-link:hover {
    opacity: 0.75;
}

/* Navigation */
.main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-link {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.85rem;
    font-weight: 500;
    padding: 6px 14px;
    border-radius: 6px;
    transition: all 0.15s;
    white-space: nowrap;
}

.nav-link:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
}

.nav-link:active {
    transform: scale(0.97);
}

/* Content */
main {
    padding-top: 8px;
}

/* Mobile: header becomes top bar */
@media (max-width: 768px) {
    body {
        padding-bottom: 100px;
    }

    .container {
        padding: 0 14px 30px;
    }

    .site-header {
        margin-bottom: 24px;
    }

    .header-inner {
        height: 50px;
    }

    .logo {
        font-size: 1rem;
    }

    .main-nav {
        gap: 2px;
    }

    .nav-link {
        font-size: 0.78rem;
        padding: 5px 10px;
    }
}

@media (max-width: 380px) {
    .header-inner {
        height: 46px;
    }

    .logo {
        font-size: 0.9rem;
    }

    .nav-link {
        font-size: 0.72rem;
        padding: 4px 8px;
    }
}