:root {
    /* Dark theme variables */
    --bg-color: #1a1a1a;
    --text-color: #e0e0e0;
    --card-bg: #2d2d2d;
    --primary-color: #64B5F6;
    --primary-dark: #42A5F5;
    --category-bg: #37474F;
    --category-text: #90CAF9;
    --border-color: #404040;
    --shadow-color: rgba(0,0,0,0.3);
    --hover-bg: #353535;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    max-width: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    transition: background-color 0.3s, color 0.3s;
    overflow-x: hidden;
    min-height: 100vh;
    width: 100vw;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
    max-width: 100%;
    min-height: 100vh;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

h1 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.search-container {
    display: flex;
    gap: 1rem;
    max-width: 600px;
    margin: 0 auto;
    align-items: center;
    width: 100%;
}

input[type="text"],
input[type="url"],
select,
textarea {
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    width: 100%;
    background-color: var(--card-bg);
    color: var(--text-color);
    max-width: 100%;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

select {
    min-width: 150px;
}

.channels-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.channel-card {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 4px var(--shadow-color);
    transition: transform 0.2s, box-shadow 0.2s;
    margin: 0;
    width: 100%;
}

.channel-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--shadow-color);
}

.channel-card h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.categories {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.category {
    display: inline-block;
    background: var(--category-bg);
    color: var(--category-text);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.875rem;
}

.channel-card a {
    color: white;
    background: var(--primary-color);
    text-decoration: none;
    display: inline-block;
    margin-top: 1rem;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color 0.2s, transform 0.2s;
    font-weight: 500;
}

.channel-card a:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    text-decoration: none;
}

.channel-card a:active {
    transform: translateY(0);
}

/* Admin Styles */
.admin-form {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px var(--shadow-color);
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.button-group {
    display: flex;
    gap: 1rem;
}

button {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.2s;
}

button:hover {
    background: var(--primary-dark);
}

.back-link {
    display: inline-block;
    color: var(--text-color);
    text-decoration: none;
    margin-bottom: 1rem;
    opacity: 0.8;
}

.back-link:hover {
    opacity: 1;
}

.edit-btn {
    background: var(--primary-color);
}

.delete-btn {
    background: #ff4444;
}

.delete-btn:hover {
    background: #cc0000;
}

footer {
    text-align: center;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

footer a {
    color: var(--primary-color);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

.error-message,
.no-results {
    grid-column: 1 / -1;
    text-align: center;
    padding: 2rem;
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 2px 4px var(--shadow-color);
}

.error-message p {
    color: #ff4444;
    font-weight: 500;
}

.no-results p {
    color: var(--text-color);
    opacity: 0.8;
}

/* Hide scrollbars when in iframe */
html {
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE and Edge */
}

html::-webkit-scrollbar {
    display: none; /* Chrome, Safari, Opera */
}

/* Mobile and iframe responsiveness */
@media screen and (max-width: 768px) {
    .container {
        padding: 1rem;
        width: 100%;
    }

    .channels-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .search-container {
        flex-direction: column;
        width: 100%;
    }

    .channel-card {
        padding: 1rem;
        margin: 0;
        width: 100%;
    }
}

/* Iframe specific styles */
.container {
    width: 100%;
    max-width: 100%;
    min-height: 100vh;
}

body {
    min-height: 100vh;
    width: 100vw;
    margin: 0;
    padding: 0;
}

/* Ensure content fits within viewport */
* {
    max-width: 100%;
}

input[type="text"],
input[type="url"],
select,
textarea {
    max-width: 100%;
    width: 100%;
}