/* =================================
   * Global Styles & Variables
   * ================================= */
:root {
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
    
    /* Light Theme */
    --background-color: #f9f9f9;
    --secondary-background: #ffffff;
    --text-color: #1d1d1f;
    --secondary-text-color: #6e6e73;
    --border-color: #d2d2d7;
    --primary-accent: #007aff;
    --primary-accent-text: #ffffff;
    --secondary-accent: #e5e5e5;
    --secondary-accent-text: #1d1d1f;
    --shadow-color: rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] {
    /* Dark Theme */
    --background-color: #121212;
    --secondary-background: #1e1e1e;
    --text-color: #f5f5f7;
    --secondary-text-color: #86868b;
    --border-color: #3a3a3c;
    --primary-accent: #0a84ff;
    --primary-accent-text: #ffffff;
    --secondary-accent: #3a3a3c;
    --secondary-accent-text: #f5f5f7;
    --shadow-color: rgba(0, 0, 0, 0.2);
}

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

html, body {
    font-family: var(--font-sans);
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 720px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.hidden {
    display: none !important;
}


/* =================================
   * Header
   * ================================= */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

header h1 {
    font-size: 1.8rem;
    font-weight: 600;
}

#theme-switcher {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
}
#theme-switcher:hover {
    background-color: var(--secondary-accent);
}
#theme-switcher svg {
    width: 24px;
    height: 24px;
}

/* =================================
   * Main Content & Input Area
   * ================================= */
main {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

textarea#url-input {
    width: 100%;
    padding: 12px;
    font-family: var(--font-sans);
    font-size: 1rem;
    background-color: var(--secondary-background);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    resize: vertical;
    min-height: 80px;
    transition: border-color 0.2s, box-shadow 0.2s;
    box-shadow: 0 1px 2px var(--shadow-color);
}

textarea#url-input:focus {
    outline: none;
    border-color: var(--primary-accent);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.3);
}

.action-buttons {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

button {
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 500;
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}

button:active {
    transform: scale(0.98);
}

button.primary, a.primary-button {
    background-color: var(--primary-accent);
    color: var(--primary-accent-text);
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

button.primary:hover, a.primary-button:hover {
    filter: brightness(1.1);
}

button.secondary {
    background-color: var(--secondary-accent);
    color: var(--secondary-accent-text);
}
button.secondary:hover {
    filter: brightness(0.95);
}
[data-theme="dark"] button.secondary:hover {
     filter: brightness(1.1);
}

/* =================================
   * Loading, Error, Result
   * ================================= */
#loading-spinner {
    display: flex;
    justify-content: center;
    padding: 2rem;
}
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--secondary-accent);
    border-top-color: var(--primary-accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}

#error-message {
    text-align: center;
    background-color: rgba(255, 59, 48, 0.1);
    color: #ff3b30;
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 59, 48, 0.2);
}
[data-theme="dark"] #error-message {
     background-color: rgba(255, 69, 58, 0.15);
     color: #ff453a;
     border-color: rgba(255, 69, 58, 0.3);
}

#result-container {
    background-color: var(--secondary-background);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 4px 12px var(--shadow-color);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

#media-title {
    font-size: 1.25rem;
    font-weight: 600;
    text-align: center;
}

#video-player, #image-gallery img {
    width: 100%;
    max-height: 50vh;
    border-radius: 12px;
    background-color: #000;
}

#image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 10px;
}

a#download-btn {
    align-self: center;
    width: 100%;
    max-width: 300px;
    padding: 12px 20px;
    font-weight: 500;
}


/* =================================
   * Footer
   * ================================= */
footer {
    text-align: center;
    margin-top: 2rem;
    color: var(--secondary-text-color);
    font-size: 0.875rem;
}