/* --- Global Styles & Variables --- */
:root {
    --sidebar-bg: #202123;
    --main-bg: #FFFFFF;
    --border-color: #444654;
    --text-primary: #ECECF1;
    --text-secondary: #8E8EA0;
    --text-dark: #353740;
    --accent-color: #10a3f7;
    --font-family: 'Inter', sans-serif;
    --shadow: 0 4px 25px rgba(0, 0, 0, 0.1);
    --prompt-bar-max-width: 800px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { height: -webkit-fill-available; }
body { font-family: var(--font-family); background-color: var(--main-bg); color: var(--text-dark); overflow: hidden; height: 100vh; height: -webkit-fill-available; }
.studio-layout { display: flex; height: 100%; position: relative; }
.sidebar { width: 260px; background-color: var(--sidebar-bg); color: var(--text-primary); display: flex; flex-direction: column; padding: 0.8rem; flex-shrink: 0; transition: transform 0.3s ease-in-out; }
.new-blog-button { width: 100%; padding: 0.75rem; background: transparent; border: 1px solid var(--border-color); border-radius: 8px; color: var(--text-primary); font-size: 0.9rem; font-weight: 500; cursor: pointer; display: flex; align-items: center; gap: 0.75rem; transition: background-color 0.2s; }
.new-blog-button:hover { background-color: #2A2B2E; }
.sidebar-content { flex-grow: 1; overflow-y: auto; margin-top: 1.5rem; }
.history-title { font-size: 0.75rem; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; padding: 0 0.5rem 0.5rem 0.5rem; }
#history-list { list-style: none; }
#history-list li { padding: 0.6rem 0.8rem; font-size: 0.9rem; border-radius: 6px; cursor: pointer; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; transition: background-color 0.2s; }
#history-list li:hover { background-color: #2A2B2E; }
#history-list li.placeholder { color: var(--text-secondary); cursor: default; }
#history-list li.placeholder:hover { background: none; }
.sidebar-footer { border-top: 1px solid var(--border-color); padding-top: 1rem; }
#login-btn { width: 100%; padding: 0.75rem; background: var(--accent-color); border-radius: 8px; color: white; border: none; cursor: pointer; font-weight: 500; }
#creator-profile { display: flex; justify-content: center; align-items: center; gap: 1.5rem; width: 100%; }
#creator-profile a { color: var(--text-secondary); text-decoration: none; transition: color 0.2s; }
#creator-profile a:hover { color: var(--text-primary); }
.icon { width: 20px; height: 20px; fill: currentColor; }
.material-icons.icon { font-size: 24px; }
.sidebar-overlay { display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0; background-color: rgba(0, 0, 0, 0.5); z-index: 998; }
.content-wrapper { flex-grow: 1; position: relative; display: flex; flex-direction: column; overflow: hidden; }
.main-content { flex-grow: 1; overflow-y: auto; padding: 1rem; }
#welcome-view { height: 100%; display: flex; justify-content: center; align-items: center; text-align: center; }
.welcome-logo { width: 80px; height: 80px; margin-bottom: 1rem; }
.welcome-content { display: flex; flex-direction: column; align-items: center; }
.welcome-content h1 { font-size: 2.2rem; font-weight: 600; margin-bottom: 0.5rem; }
.welcome-content p { font-size: 1rem; color: #666; max-width: 400px; }
#generation-view { padding-top: 2rem; padding-bottom: 200px; max-width: var(--prompt-bar-max-width); margin: 0 auto; width: 100%; }
.prompt-area-container { position: absolute; bottom: 0; left: 0; right: 0; display: flex; flex-direction: column; align-items: center; padding-left: 1rem; padding-right: 1rem; padding-bottom: calc(1rem + env(safe-area-inset-bottom)); background-color: var(--main-bg); }
.prompt-fade { position: absolute; bottom: 100%; height: 3rem; width: 100%; max-width: calc(var(--prompt-bar-max-width) + 24px); background: linear-gradient(to top, var(--main-bg) 30%, transparent); pointer-events: none; z-index: 2; }
#blog-form { width: 100%; max-width: var(--prompt-bar-max-width); }
.prompt-bar { width: 100%; background: var(--main-bg); border: 1px solid #D1D5DB; border-radius: 16px; box-shadow: var(--shadow); display: flex; align-items: center; transition: border-color 0.2s, box-shadow 0.2s; }
.prompt-bar:focus-within { border-color: var(--accent-color); box-shadow: 0 4px 25px rgba(16, 163, 127, 0.2); }
#topic { flex-grow: 1; border: none; outline: none; background: transparent; font-size: 1rem; font-family: var(--font-family); padding: 1rem; height: 54px; }
.prompt-actions { display: flex; align-items: center; gap: 0.5rem; padding-right: 0.5rem; }
.tone-selector-desktop { position: relative; display: flex; align-items: center; }
#tone-desktop { border: 1px solid #E5E7EB; border-radius: 8px; background: transparent; font-family: var(--font-family); font-size: 0.9rem; padding: 0.5rem 2rem 0.5rem 0.8rem; color: #374151; cursor: pointer; -webkit-appearance: none; -moz-appearance: none; appearance: none; }
.dropdown-icon { position: absolute; right: 0.5rem; color: #9CA3AF; pointer-events: none; }
#generate-btn { background: var(--accent-color); color: white; border: none; border-radius: 10px; width: 40px; height: 40px; cursor: pointer; display: flex; justify-content: center; align-items: center; transition: background-color 0.2s; flex-shrink: 0; }
#generate-btn:disabled { background: #9CA3AF; cursor: not-allowed; }
.loader { width: 20px; height: 20px; border: 3px solid rgba(255, 255, 255, 0.3); border-top-color: #fff; border-radius: 50%; animation: spin 1s linear infinite; }
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }
#blog-output { line-height: 1.8; }
#blog-output h1, #blog-output h2, #blog-output h3 { margin: 1.5em 0 0.5em 0; font-weight: 600; }
#blog-output h1 { font-size: 2em; border-bottom: 1px solid #E5E7EB; padding-bottom: 0.3em;}
#blog-output h2 { font-size: 1.5em; }
#blog-output h3 { font-size: 1.25em; }
#blog-output p { margin-bottom: 1em; }
#blog-output ul, #blog-output ol { margin: 0 0 1em 1.5em; }
#blog-output li { margin-bottom: 0.5em; }
#blog-output code { background: #F3F4F6; color: #4B5563; padding: 2px 6px; border-radius: 4px; font-family: monospace; }
#blog-output pre { background: #1F2937; color: #D1D5DB; padding: 1rem; border-radius: 8px; overflow-x: auto; margin-bottom: 1em; }
#blog-output pre code { background: none; padding: 0; }
#blog-output blockquote { border-left: 3px solid var(--accent-color); padding-left: 1em; margin: 1em 0; color: #6B7280; font-style: italic; }
#blog-output a { color: var(--accent-color); text-decoration: none; }
#blog-output a:hover { text-decoration: underline; }
.menu-toggle { display: none; position: absolute; top: 1rem; left: 1rem; z-index: 100; background: #f0f0f0; border: 1px solid #ddd; border-radius: 8px; width: 40px; height: 40px; align-items: center; justify-content: center; cursor: pointer; }
.tone-toggle-mobile { display: none; }
@media (max-width: 768px) {
    .sidebar { position: fixed; top: 0; left: 0; bottom: 0; transform: translateX(-100%); z-index: 999; }
    body.sidebar-open .sidebar { transform: translateX(0); }
    body.sidebar-open .sidebar-overlay { display: block; }
    .menu-toggle { display: flex; }
    .main-content { padding-top: 4rem; }
    .prompt-area-container { padding: 0 0.8rem calc(0.8rem + env(safe-area-inset-bottom)) 0.8rem; }
    .tone-selector-desktop { display: none; }
    .tone-toggle-mobile { display: flex; position: relative; align-items: center; justify-content: center; width: 40px; height: 40px; flex-shrink: 0; margin-left: 6px; }
    .tone-toggle-mobile .material-icons { color: #6B7280; z-index: 1; }
    #tone-mobile { position: absolute; top: 0; left: 0; width: 100%; height: 100%; opacity: 0; cursor: pointer; z-index: 2; -webkit-appearance: none; -moz-appearance: none; appearance: none; }
    #topic { padding-left: 0.8rem; }
    .prompt-actions { padding-right: 6px; }
}

/* --- NEW: ABOUT BUTTON & MODAL STYLES --- */
.about-container {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    z-index: 100;
}

.about-btn {
    background-color: #f0f0f0;
    border: 1px solid #ddd;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    position: relative;
    transition: all 0.3s ease;
}

.about-btn .material-icons {
    color: var(--text-dark);
}

.about-tooltip {
    position: absolute;
    right: 120%;
    top: 50%;
    transform: translateY(-50%);
    background-color: var(--sidebar-bg);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    pointer-events: none;
}

.about-btn:hover {
    background-color: #e0e0e0;
}

.about-btn:hover .about-tooltip {
    opacity: 1;
    visibility: visible;
}

/* Modal styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
}

.modal-content {
    background-color: var(--main-bg);
    color: var(--text-dark);
    padding: 2.5rem 2rem 2rem 2rem;
    border-radius: 12px;
    max-width: 800px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.modal-close-btn {
    position: absolute;
    top: 0.75rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 2rem;
    color: #999;
    cursor: pointer;
    line-height: 1;
    transition: color 0.2s;
}

.modal-close-btn:hover {
    color: var(--text-dark);
}

.modal-content h2, .modal-content h3 {
    margin-top: 1.5em;
    margin-bottom: 0.8em;
    color: var(--text-dark);
}
.modal-content h2 { font-size: 1.8rem; margin-top: 0; }
.modal-content h3 { font-size: 1.3rem; }
.modal-content p, .modal-content li {
    line-height: 1.7;
    margin-bottom: 1em;
    color: #444;
}
.modal-content ol {
    padding-left: 1.5rem;
}
.modal-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 2em 0;
}
.modal-content th, .modal-content td {
    border: 1px solid #ddd;
    padding: 0.8rem;
    text-align: left;
}
.modal-content th {
    background-color: #f7f7f7;
    font-weight: 600;
}
.modal-content td strong {
    color: var(--accent-color);
}