/* --- Root CSS Variables --- */
:root {
    --gem-tabs-active-bg: #3b82f6;
    --gem-tabs-active-text: #ffffff;
    --gem-tabs-inactive-bg: #e5e7eb;
    --gem-tabs-inactive-text: #374151;
    --gem-tabs-panel-bg: #ffffff;
    --gem-tabs-padding: 12px;
    --gem-tabs-radius: 8px;
}

/* --- Base Container --- */
.gem-tabs-container {
    width: 100%;
}
.gem-tabs-container[data-position="left"] {
    display: flex;
    flex-wrap: wrap; /* Allow wrapping on small screens */
}

/* --- Tab List (The row of buttons) --- */
.gem-tab-list {
    display: flex;
    flex-wrap: wrap; /* Allow tabs to wrap */
    gap: 4px;
    justify-content: flex-start;
}
.gem-tabs-container[data-position="top"] .gem-tab-list {
    border-bottom: 2px solid var(--gem-tabs-inactive-bg);
}
.gem-tabs-container[data-position="left"] .gem-tab-list {
    flex-direction: column;
    flex-shrink: 0;
    border-right: 2px solid var(--gem-tabs-inactive-bg);
    margin-right: -2px; /* Overlap border */
    z-index: 10;
}

/* --- Individual Tab Buttons --- */
.gem-tab {
    padding: var(--gem-tabs-padding);
    font-weight: 500;
    cursor: pointer;
    border: none;
    background-color: var(--gem-tabs-inactive-bg);
    color: var(--gem-tabs-inactive-text);
    transition: background-color 0.2s, color 0.2s;
    white-space: nowrap;
}
.gem-tab:hover,
.gem-tab:focus {
    opacity: 0.85;
    outline: 2px solid var(--gem-tabs-active-bg);
    outline-offset: 2px;
}
.gem-tab[aria-selected="true"] {
    background-color: var(--gem-tabs-active-bg);
    color: var(--gem-tabs-active-text);
}

/* Top Position Styles */
.gem-tabs-container[data-position="top"] .gem-tab {
    border-top-left-radius: var(--gem-tabs-radius);
    border-top-right-radius: var(--gem-tabs-radius);
    margin-bottom: -2px; /* Overlap border */
}
.gem-tabs-container[data-position="top"] .gem-tab[aria-selected="true"] {
    border-bottom: 2px solid var(--gem-tabs-active-bg);
}

/* Left Position Styles */
.gem-tabs-container[data-position="left"] .gem-tab {
    border-top-left-radius: var(--gem-tabs-radius);
    border-bottom-left-radius: var(--gem-tabs-radius);
    margin-right: -2px; /* Overlap border */
    width: 100%;
    text-align: left;
}
.gem-tabs-container[data-position="left"] .gem-tab[aria-selected="true"] {
    border-right: 2px solid var(--gem-tabs-active-bg);
}

/* --- Tab Panels (The content) --- */
.gem-tab-panels {
    width: 100%;
}
.gem-tab-panel {
    position: relative; /* For TTS button */
    background-color: var(--gem-tabs-panel-bg);
    padding: var(--gem-tabs-padding);
    border-radius: var(--gem-tabs-radius);
    overflow: auto;
}
.gem-tab-panel:focus {
    outline: 2px solid var(--gem-tabs-active-bg);
    outline-offset: 2px;
}
.gem-tab-panel[hidden] {
    display: none;
}
/* Make room for TTS button */
.gem-tab-panel p.gem-tts-padding {
    padding-right: 40px; 
}

/* --- TTS Button Styles --- */
.tts-btn {
    position: absolute;
    top: 12px;
    right: 12px;
    background-color: #f3f4f6;
    color: #4b5563;
    border: 1px solid #d1d5db;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
    z-index: 10;
}
.tts-btn:hover {
    background-color: #e5e7eb;
    color: #1f2937;
}
.tts-btn[data-playing="true"] {
    background-color: #fecaca;
    color: #b91c1c;
}
.tts-btn[data-loading="true"] {
    cursor: default;
    animation: spin 1s linear infinite;
}
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Adjust panel border radius based on position */
.gem-tabs-container[data-position="top"] .gem-tab-panel {
    border-top-left-radius: 0;
}
.gem-tabs-container[data-position="left"] .gem-tab-panel {
    border-top-left-radius: 0;
    border: 2px solid var(--gem-tabs-inactive-bg);
}
.gem-tabs-container[data-position="left"] .gem-tab-list + .gem-tab-panels {
    flex-grow: 1;
    min-width: 50%; /* Ensure panel has space */
}