/* style.css - Final SPA Version with Dynamic Icon Navigation */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;700&display=swap');

:root {
    --bg-gradient: linear-gradient(135deg, #2c3e50 0%, #16222A 100%);
    --container-bg: #283044;
    --card-bg: #374055;
    --card-bg-light: #414a63;
    --text-primary: #f8f9fa;
    --text-secondary: #adb5bd;
    --border-color: #495057;
    --accent-color: #5865f2;
    --accent-hover: #4752c4;
    --download-btn-bg: linear-gradient(45deg, #28a745, #218838);
    --download-btn-hover: linear-gradient(45deg, #2ebf4e, #24993f);
    --error-bg: #4a2125;
    --error-text: #f8d7da;
    --error-border: #721c24;
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    --transition-speed: 0.3s;
}

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

html {
    scroll-behavior: smooth; /* Enable smooth scrolling fallback */
}

body {
    font-family: 'Inter', sans-serif;
    background-image: var(--bg-gradient);
    color: var(--text-primary);
    background-attachment: fixed;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex-grow: 1; /* Ensures main content takes up available space */
}

/* --- Sticky Header & Icon Navigation --- */
.app-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: rgba(40, 48, 68, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    width: 100%;
}
.main-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    height: 64px;
}
.logo-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}
.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--accent-color);
}
.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}
.nav-links {
    list-style: none;
    display: flex;
    gap: 0.5rem; /* Reduced gap for icon buttons */
}
.nav-links a {
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;  /* Set a fixed size for the button area */
    height: 40px;
    border-radius: 50%; /* Make it a circle */
    transition: color var(--transition-speed), background-color var(--transition-speed);
}
.nav-links a:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.05);
}
.nav-links a.active {
    color: var(--accent-color);
    background-color: rgba(88, 101, 242, 0.1); /* Semi-transparent accent color */
}
.nav-links svg {
    width: 22px;
    height: 22px;
}

/* --- Main Content Layout --- */
.content-section { padding: 4rem 0; }
.container { max-width: 900px; margin: 0 auto; padding: 0 2rem; }
.tool-header { text-align: center; margin-bottom: 2rem; }
.tool-header h1 { font-size: 2.5rem; font-weight: 700; }
.tool-header p { font-size: 1.1rem; color: var(--text-secondary); margin-top: 0.5rem; }

/* --- Info Sections ("How To", "Features") --- */
.info-section { background-color: var(--container-bg); }
.info-section h2 { text-align: center; font-size: 2rem; margin-bottom: 2.5rem; }
.step-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1.5rem; }
.card { background-color: var(--card-bg); padding: 1.5rem; border-radius: 12px; border: 1px solid var(--border-color); }
.card h3 { color: var(--accent-color); margin-bottom: 0.75rem; }
.card p { color: var(--text-secondary); line-height: 1.6; }

/* --- Downloader Tool Styles --- */
.hidden { display: none !important; }
.error { color: var(--error-text); background-color: var(--error-bg); padding: 1rem; border-radius: 8px; border: 1px solid var(--error-border); }
.input-section { display: flex; gap: 0.5rem; align-items: center; margin-bottom: 2rem; }
.input-wrapper { position: relative; flex-grow: 1; }
#video-url { width: 100%; padding: 1rem 3rem 1rem 1.5rem; border: 1px solid var(--border-color); border-radius: 10px; font-size: 1rem; transition: border-color 0.2s, box-shadow 0.2s; background-color: var(--card-bg); color: var(--text-primary); }
#video-url:focus { outline: none; border-color: var(--accent-color); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-color) 20%, transparent); }
#paste-btn { padding: 0.9rem; border-radius: 10px; border: 1px solid var(--border-color); background-color: var(--card-bg); color: var(--text-secondary); font-weight: 500; cursor: pointer; transition: all var(--transition-speed); }
#paste-btn:hover { border-color: var(--accent-color); color: var(--accent-color); }
.url-icon { position: absolute; right: 1rem; top: 50%; transform: translateY(-50%); width: 20px; height: 20px; opacity: 0.5; transition: opacity 0.3s ease, transform 0.3s ease; pointer-events: none; }
.url-icon.active { opacity: 1; transform: translateY(-50%) scale(1.1); }
#status-area { text-align: center; padding: 2rem 0; transition: all var(--transition-speed); }
.loader { width: 50px; height: 50px; border: 5px solid color-mix(in srgb, var(--text-primary) 10%, transparent); border-top: 5px solid var(--accent-color); border-radius: 50%; animation: spin 1s linear infinite; margin: 0 auto 1rem; }
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }
.video-info { display: flex; align-items: center; gap: 1.5rem; padding-bottom: 1.5rem; border-bottom: 1px solid var(--border-color); margin-bottom: 1.5rem; transition: all var(--transition-speed); border-color: var(--border-color); }
.thumbnail-container { position: relative; flex-shrink: 0; }
.preview-btn { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 50px; height: 50px; background-color: rgba(0, 0, 0, 0.6); border: 2px solid white; border-radius: 50%; display: flex; justify-content: center; align-items: center; cursor: pointer; opacity: 0; transition: opacity 0.3s ease; z-index: 10; }
.preview-btn svg { stroke: white; width: 24px; height: 24px; }
.thumbnail-container:hover .preview-btn { opacity: 1; }

/* ADDED: Styles for the new thumbnail download button */
.thumb-action-btn {
    position: absolute;
    bottom: 8px;
    right: 8px;
    z-index: 15;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: rgba(23, 34, 42, 0.7);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    padding: 0;
}
.thumb-action-btn:hover:not(:disabled) {
    background-color: rgba(88, 101, 242, 0.8);
    transform: scale(1.1);
    border-color: rgba(255, 255, 255, 0.8);
}
.thumb-action-btn:disabled {
    cursor: not-allowed;
    background-color: rgba(0, 0, 0, 0.4);
}
.thumb-action-btn svg {
    width: 18px;
    height: 18px;
    stroke: white;
}
.thumb-spinner.spinner {
    width: 20px;
    height: 20px;
}

#video-thumbnail { width: 200px; height: 112px; border-radius: 10px; object-fit: cover; box-shadow: 0 4px 10px rgba(0,0,0,0.1); display: block; }
#video-title { font-size: 1.75rem; font-weight: 600; }

/* --- BEAUTIFUL FORMATS SECTION --- */
.formats-list { display: flex; flex-direction: column; gap: 2rem; }

.format-group {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.format-group-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.format-group-header svg {
    width: 28px;
    height: 28px;
    color: var(--accent-color);
}

.format-group-header h4 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.section-desc {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    padding-left: calc(28px + 0.75rem); /* Align with title */
}

.format-items-container {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.format-item {
    display: flex;
    align-items: center;
    padding: 1rem;
    background-color: var(--card-bg-light);
    border: 1px solid transparent; /* Use transparent for smoother hover transition */
    border-radius: 10px;
    transition: transform 0.2s, box-shadow 0.2s, background-color var(--transition-speed), border-color var(--transition-speed);
}

.format-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    border-color: var(--accent-color);
}

.format-details-mobile { display: none; }

.format-details-desktop {
    flex-grow: 1;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1.5rem;
    align-items: center;
}

.format-prop { display: flex; align-items: center; gap: 0.75rem; }
.format-prop svg { flex-shrink: 0; width: 20px; height: 20px; color: var(--text-secondary); }
.format-prop div { display: flex; flex-direction: column; }
.format-prop strong { font-size: 0.75rem; font-weight: 500; color: var(--text-secondary); text-transform: uppercase; margin-bottom: 0.1rem; }
.format-prop span { font-size: 1rem; font-weight: 500; color: var(--text-primary); }

.format-actions { display: flex; gap: 0.75rem; margin-left: 1rem; flex-shrink: 0; }
.action-btn { display: flex; align-items: center; justify-content: center; border: none; border-radius: 8px; cursor: pointer; transition: all 0.2s ease; }
.action-btn:disabled { cursor: not-allowed; filter: grayscale(50%); opacity: 0.7; }
.download-btn { background-image: var(--download-btn-bg); color: white; font-weight: 600; padding: 0.6rem 1rem; gap: 0.5rem; box-shadow: 0 2px 5px rgba(0,0,0,0.1); }
.download-btn:hover:not(:disabled) { background-image: var(--download-btn-hover); transform: translateY(-1px); box-shadow: 0 4px 8px rgba(0,0,0,0.15); }
.get-link-btn { background-color: var(--card-bg); width: 36px; height: 36px; border: 1px solid var(--border-color); }
.get-link-btn svg { width: 20px; height: 20px; stroke: var(--text-secondary); transition: stroke 0.2s; }
.get-link-btn:hover:not(:disabled) { border-color: var(--text-primary); }
.get-link-btn:hover:not(:disabled) svg { stroke: var(--text-primary); }

.modal-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.6); display: flex; justify-content: center; align-items: center; z-index: 2000; opacity: 0; pointer-events: none; transition: opacity 0.3s ease; }
.modal-overlay.visible { opacity: 1; pointer-events: auto; }
.modal-content { background: var(--container-bg); padding: 2rem; border-radius: 12px; width: 90%; max-width: 600px; box-shadow: 0 5px 15px rgba(0,0,0,0.3); transform: scale(0.95); transition: transform 0.3s ease, background-color var(--transition-speed); }
.modal-overlay.visible .modal-content { transform: scale(1); }
.modal-content .close-button { float: right; font-size: 28px; font-weight: bold; cursor: pointer; color: var(--text-secondary); }
.modal-content .close-button:hover { color: var(--text-primary); }
#direct-url-display { width: 100%; height: 80px; margin-top: 1rem; font-family: monospace; resize: vertical; border: 1px solid var(--border-color); border-radius: 8px; padding: 0.5rem; background-color: var(--card-bg); color: var(--text-primary); }
.modal-actions { display: flex; gap: 1rem; margin-top: 1rem; }
.modal-button { width: 100%; background-color: var(--accent-color); color: white; padding: 0.75rem; border: none; border-radius: 8px; font-weight: 600; cursor: pointer; }
.modal-button:hover { background-color: var(--accent-hover); }
.modal-button.secondary { background-color: var(--card-bg); color: var(--text-primary); border: 1px solid var(--border-color); }
.modal-button.secondary:hover { background-color: var(--border-color); }
.warning { font-size: 0.9rem; background-color: #fff3cd; border: 1px solid #ffeeba; padding: 0.75rem; border-radius: 6px; margin-top: 1rem; color: #856404; }
.spinner { animation: rotate 2s linear infinite; width: 20px; height: 20px; }
.spinner .path { stroke: white; stroke-linecap: round; animation: dash 1.5s ease-in-out infinite; }
@keyframes rotate { 100% { transform: rotate(360deg); } }
@keyframes dash { 0% { stroke-dasharray: 1, 150; stroke-dashoffset: 0; } 50% { stroke-dasharray: 90, 150; stroke-dashoffset: -35; } 100% { stroke-dasharray: 90, 150; stroke-dashoffset: -124; } }
#toast-container { position: fixed; bottom: 20px; right: 20px; z-index: 9999; display: flex; flex-direction: column; gap: 10px; }
.toast { padding: 15px 20px; border-radius: 8px; color: #fff; font-weight: 500; box-shadow: 0 4px 15px rgba(0,0,0,0.2); transform: translateX(120%); animation: slideIn 0.5s forwards, slideOut 0.5s 4.5s forwards; }
.toast.success { background-color: #28a745; }
.toast.error { background-color: #dc3545; }
.toast.info { background-color: #17a2b8; }
@keyframes slideIn { from { transform: translateX(120%); } to { transform: translateX(0); } }
@keyframes slideOut { from { transform: translateX(0); } to { transform: translateX(120%); } }
#history-section { border-top: 1px solid var(--border-color); }
.history-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }
.history-header h2 { font-size: 1.5rem; }
#clear-history-btn { background-color: transparent; border: 1px solid var(--border-color); color: var(--text-secondary); padding: 0.5rem 1rem; border-radius: 8px; cursor: pointer; transition: all var(--transition-speed); }
#clear-history-btn:hover { background-color: var(--error-bg); color: var(--error-text); border-color: var(--error-border); }
#history-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; }
.history-item { background-color: var(--card-bg); border-radius: 12px; overflow: hidden; cursor: pointer; border: 1px solid var(--border-color); transition: transform 0.2s ease, box-shadow 0.2s ease; position: relative; }
.history-item:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.history-item-thumb { width: 100%; height: 120px; object-fit: cover; display: block; }
.history-item-title { padding: 0.75rem 1rem; font-weight: 500; font-size: 0.9rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.history-item-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.5); color: white; display: flex; justify-content: center; align-items: center; opacity: 0; transition: opacity 0.2s ease; font-weight: 600; }
.history-item:hover .history-item-overlay { opacity: 1; }
.modal-overlay.image-modal .modal-content { background: transparent; padding: 0; width: auto; max-width: 90vw; max-height: 90vh; box-shadow: none; display: flex; align-items: center; justify-content: center; }
.modal-overlay.image-modal .close-button { position: absolute; top: -15px; right: -15px; font-size: 2rem; color: white; background-color: rgba(0, 0, 0, 0.5); border-radius: 50%; width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; text-shadow: 0 1px 3px black; }
#full-res-thumbnail { max-width: 100%; max-height: 100%; border-radius: 12px; box-shadow: 0 10px 30px rgba(0,0,0,0.4); }

.app-footer { padding: 2rem 1rem; text-align: center; border-top: 1px solid var(--border-color); background-color: var(--container-bg); color: var(--text-secondary); font-size: 0.9rem; }
.app-footer a { color: var(--text-primary); text-decoration: none; font-weight: 500; }
.app-footer a:hover { text-decoration: underline; color: var(--accent-color); }
#privacy-modal-overlay .modal-content { max-width: 800px; max-height: 80vh; display: flex; flex-direction: column; }
.privacy-content { overflow-y: auto; padding-right: 1rem; }
.privacy-content h3 { color: var(--accent-color); margin-top: 1.5rem; margin-bottom: 0.5rem; }
.privacy-content p, .privacy-content li { color: var(--text-secondary); line-height: 1.7; margin-bottom: 1rem; }
.privacy-content ul { padding-left: 20px; }

/* --- RESPONSIVE DESIGN --- */
@media (max-width: 768px) {
    .container, .main-nav { padding-left: 1rem; padding-right: 1rem; }
    .content-section { padding-top: 2.5rem; padding-bottom: 2.5rem; }
    .tool-header h1 { font-size: 2rem; }
    #video-title { font-size: 1.25rem; text-align: center; }
    .info-section h2 { font-size: 1.75rem; }
    .video-info { flex-direction: column; align-items: center; gap: 1rem; }
    #video-thumbnail { width: 100%; max-width: 320px; height: auto; }

    /* --- NEW MOBILE FORMAT CARD IMPLEMENTATION --- */
    .format-details-desktop { display: none; }
    .format-details-mobile { display: flex; flex-grow: 1; }
    .format-item { flex-direction: row; justify-content: space-between; align-items: center; gap: 0.75rem; padding: 0.75rem 1rem; }
    .format-info-mobile { display: flex; flex-direction: column; }
    .format-quality { font-size: 1.1rem; font-weight: 700; color: var(--text-primary); margin: 0; }
    .format-meta { font-size: 0.85rem; color: var(--text-secondary); }
    .format-actions { margin-left: 0; width: auto; align-items: center; }
    .download-btn { width: 44px; height: 44px; padding: 0; border-radius: 50%; flex-shrink: 0; }
    .download-btn .download-text { display: none; }
    .download-btn svg { width: 22px; height: 22px; }
    .get-link-btn { width: 36px; height: 36px; background-color: transparent; border: none; }
    
    .modal-actions { flex-direction: column; }
    .format-group { padding: 1rem; }
    .format-group-header h4 { font-size: 1.25rem; }
}

@media (max-width: 480px) {
    .logo-text { display: none; }
    .main-nav { padding-left: 0.5rem; padding-right: 0.5rem; }
    .nav-links { gap: 0; }
    #toast-container { right: 10px; bottom: 10px; width: calc(100% - 20px); }
    .toast { width: 100%; }
}
.close-button { display: flex; justify-content: right; }