:root {
    --md-primary: #5856d6;
    --md-primary-hover: #2c2c2c;
    --md-on-primary: #FFFFFF;
    --md-surface: #FFFBFE;
    --md-surface-1: #F7F2FA;
    --md-surface-2: #F3EDF7;
    --md-surface-3: #d9cce2;
    --md-elevation-1: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.14);
    --md-elevation-2: 0 3px 6px rgba(0,0,0,0.15), 0 2px 4px rgba(0,0,0,0.12);
}

body {
    font-family: 'Roboto', sans-serif;
    margin: 0;
    background-color: var(--md-surface-2);
    color: #1C1B1F;
    height: 100svh;
    -webkit-tap-highlight-color: transparent;
    outline: none;
    -webkit-user-select: none;
    user-select: none;
}

.navbar {
    background-color: var(--md-surface-1);
    padding: 16px 24px;
    box-shadow: var(--md-elevation-1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--md-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 12px;
}

.search-bar {
    background: var(--md-surface-2);
    border-radius: 24px;
    border: 1px solid var(--md-primary);
    box-shadow: var(--md-elevation-1);
    padding: 8px 16px;
    display: flex;
    align-items: center;
    width: calc(100% - 50%);
    max-width: 240px;
}

.search-bar input {
    border: none;
    background: none;
    padding: 4px;
    width: 100%;
    outline: none;
}

.feeds-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 32px 24px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 15px;
}

.channel {
    background: var(--md-surface);
    border-radius: 16px;
    padding: 16px;
    transition: all 0.2s ease;
    cursor: pointer;
    box-shadow: var(--md-elevation-1);
    border: 1px solid var(--md-primary);
    overflow: hidden;
}

.channel:hover {
    box-shadow: var(--md-elevation-2);
    background: var(--md-surface-1);
    border: 1px solid var(--md-primary-hover);
}

.channel img {
    width: 120px;
    height: 120px;
    background: var(--md-surface-3);
    object-fit: cover;
    border-radius: 10px;
    margin: 0 auto 16px;
    display: block;
    box-shadow: var(--md-elevation-1);
}

.channel h3 {
    margin: 0;
    text-align: center;
    font-size: 1rem;
    font-weight: 500;
}

.channel .category {
    text-align: center;
    font-size: 0.9rem;
    color: #666;
}

.popup {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    justify-content: center;
    align-items: center;
}

.popup-content {
    background: var(--md-surface-1);
    padding: 35px 2px 2px 2px;
    border-radius: 10px;
    position: relative;
    width: 90%;
    max-width: 800px;
}

.close-popup {
    position: absolute;
    top: 5px;
    right: 5px;
    color: var(--md-on-primary);
    cursor: pointer;
    font-size: 1.5rem;
    background: var(--md-primary);
    border-bottom-left-radius: 9px;
    border-top-right-radius: 9px;
    border-bottom-right-radius: 5px;
    border-top-left-radius: 5px;
    padding: 2px 20px;
    transition: background-color 0.3s;
    width: 20px;
    height: 20px;
}

.close-popup:hover {
    background: var(--md-primary-hover);
}