/* ============================================================
   INKFLOW EMOJI PICKER & EXTENSION STYLES
   Slack-inspired Single Continuous Scroll + Sticky Category Headers
   ============================================================ */

:root {
    --inkflow-emoji-primary: var(--inkflow-primary, #3b82f6);
    --inkflow-emoji-primary-light: var(--inkflow-primary-light, #eff6ff);
    --inkflow-emoji-bg-main: var(--inkflow-bg-main, #ffffff);
    --inkflow-emoji-bg-header: var(--inkflow-bg-toolbar, #f8fafc);
    --inkflow-emoji-bg-hover: var(--inkflow-bg-hover, #f1f5f9);
    --inkflow-emoji-border: var(--inkflow-border, #e2e8f0);
    --inkflow-emoji-text-main: var(--inkflow-text-main, #1e293b);
    --inkflow-emoji-text-muted: var(--inkflow-text-muted, #64748b);
    --inkflow-emoji-shadow: var(--inkflow-shadow-dropdown, 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1));
    --inkflow-emoji-radius: var(--inkflow-radius-inner, 8px);
}

/* Button wrapper for inline attachment */
.inkflow-emoji-btn-wrapper {
    display: inline-block;
    position: relative;
}

/* Main popup container */
.inkflow-emoji-picker {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    z-index: 1050;
    display: none;
    flex-direction: column;
    width: 304px;
    background: var(--inkflow-emoji-bg-main);
    border: 1px solid var(--inkflow-emoji-border);
    border-radius: var(--inkflow-emoji-radius);
    box-shadow: var(--inkflow-emoji-shadow);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    user-select: none;
    -webkit-user-select: none;
    box-sizing: border-box;
    overflow: hidden;
}

.inkflow-emoji-picker * {
    box-sizing: border-box;
}

.inkflow-emoji-picker.is-visible {
    display: flex;
}

/* Header & Tabs */
.inkflow-emoji-tabs {
    display: flex;
    align-items: center;
    background: var(--inkflow-emoji-bg-header);
    border-bottom: 1px solid var(--inkflow-emoji-border);
    padding: 4px 6px;
    gap: 2px;
    overflow-x: auto;
    scrollbar-width: none;
}

.inkflow-emoji-tabs::-webkit-scrollbar {
    display: none;
}

.inkflow-emoji-tab {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 30px;
    padding: 0;
    border: none;
    background: transparent;
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
    border-radius: 4px;
    transition: background-color 0.15s ease, transform 0.1s ease;
    opacity: 0.65;
}

.inkflow-emoji-tab:hover {
    background: var(--inkflow-emoji-bg-hover);
    opacity: 1;
}

.inkflow-emoji-tab.is-active {
    background: var(--inkflow-emoji-primary-light);
    opacity: 1;
    box-shadow: inset 0 -2px 0 var(--inkflow-emoji-primary);
}

/* Continuous Scrollable Area */
.inkflow-emoji-scroll-area {
    position: relative;
    padding: 4px 8px 10px;
    height: 250px;
    max-height: 250px;
    overflow-y: auto;
    overscroll-behavior: contain;
    scroll-behavior: smooth;
}

.inkflow-emoji-scroll-area::-webkit-scrollbar {
    width: 6px;
}
.inkflow-emoji-scroll-area::-webkit-scrollbar-thumb {
    background-color: #cbd5e1;
    border-radius: 3px;
}
.inkflow-emoji-scroll-area::-webkit-scrollbar-track {
    background: transparent;
}

/* Category Sections & Sticky Headers */
.inkflow-emoji-section {
    margin-bottom: 8px;
}

.inkflow-emoji-section-header {
    position: sticky;
    top: -4px;
    z-index: 2;
    padding: 6px 2px 4px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--inkflow-emoji-text-muted);
    background: var(--inkflow-emoji-bg-main);
    letter-spacing: 0.02em;
}

.inkflow-emoji-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 2px;
}

.inkflow-emoji-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    padding: 0;
    border: none;
    background: transparent;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.15s ease, transform 0.1s ease;
}

.inkflow-emoji-btn:hover {
    background: var(--inkflow-emoji-bg-hover);
    transform: scale(1.18);
}

.inkflow-emoji-btn:active {
    transform: scale(0.95);
}

.inkflow-emoji-btn:focus-visible {
    outline: 2px solid var(--inkflow-emoji-primary);
    outline-offset: 1px;
}

.inkflow-emoji-btn img {
    width: 1.35em;
    height: 1.35em;
    pointer-events: none;
    vertical-align: middle;
}

/* Rendered Twemoji in text / comments */
img.inkflow-emoji {
    display: inline-block;
    width: 1.25em;
    height: 1.25em;
    margin: 0 0.1em;
    vertical-align: -0.25em;
    pointer-events: none;
}

/* Responsive Modal mode for mobile screens */
@media (max-width: 640px) {
    .inkflow-emoji-picker {
        position: fixed !important;
        top: 50% !important;
        left: 50% !important;
        transform: translate(-50%, -50%) !important;
        width: 320px !important;
        max-width: 90vw !important;
        box-shadow: 0 0 0 100vw rgba(0, 0, 0, 0.4), var(--inkflow-emoji-shadow) !important;
        z-index: 999999 !important;
    }
}