/* ==========================================================================
   1. THEME COLOR VARIABLES (LIGHT & DARK) - HIGHLIGHT HUB SPECIFIC
   ========================================================================== */
/* This section is removed as theme variables are now integrated into connect.css */

/* ==========================================================================
   2. MAIN CONTAINER & SECTION STYLES
   ========================================================================== */

#highlight-hub-section {
    background-image: url('../img/Sunset-dark.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: var(--text-color);
    transition: background-color var(--transition-duration), color var(--transition-duration), border-color var(--transition-duration);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 80px 0;
    min-height: 100vh;
    box-sizing: border-box;
    overflow-x: hidden;
}

body[data-theme="light"] #highlight-hub-section {
    background-image: url('../img/Sunset-bright.png');
    background-color: var(--primary-bg);
}

.connect-highlight-hub-content {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 40px;
    padding: 0 60px; /* ★★★ 기본 여백 (481px ~ 767px) 적용 ★★★ */
}

/* ==========================================================================
   3. HIGHLIGHT HUB SECTION
   ========================================================================== */

.hub-header {
    width: 100%;
    text-align: center;
    box-sizing: border-box;
    word-break: break-word;
    flex-shrink: 0;
}

.hub-greeting-wrapper {
    display: flex;
    justify-content: center;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 0 0.5em; 
}

#hub-greeting-main,
#hub-greeting-sub {
    font-size: 2.5em;
    color: var(--text-color);
    font-weight: 700;
    margin: 10px 0 0 0;
    padding: 0;
}

#hub-sub-greeting {
    width: 100%;
    font-size: 1.2em;
    color: var(--subheading-color);
    margin-top: 20px;
    line-height: 1.7;
}

.hub-header strong {
    color: var(--text-color);
    font-weight: 700;
}

.hub-container {
    display: flex;
    width: 100%;
    margin: 0;
    min-height: auto;
    justify-content: center;
    align-items: flex-start;
    flex-direction: column;
    transition: background-color var(--transition-duration), border-color var(--transition-duration), box-shadow var(--transition-duration);
    box-sizing: border-box;
    overflow-x: hidden;
}

.highlights-panel {
    flex: 2;
    padding: 0;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    max-height: 70vh;
    background-color: transparent;
    border-radius: 8px;
    box-shadow: none;
    border: none;
    width: 100%;
    box-sizing: border-box;
    overflow-x: hidden;
}

.panel-header {
    margin-bottom: 25px;
    width: 100%;
    box-sizing: border-box;
}

.panel-header h2 {
    font-size: 1.5em;
    color: var(--text-color);
    margin-bottom: 5px;
    word-break: break-word;
}

.hub-tabs {
    margin-top: 15px;
    border-bottom: 1px solid var(--glass-border2);
    padding-bottom: 5px;
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    width: 100%;
    box-sizing: border-box;
    overflow-x: hidden;
}

.hub-tab-btn {
    background: none;
    border: none;
    padding: 8px 16px;
    font-size: 1em;
    font-weight: 600;
    color: var(--text-color);
    cursor: pointer;
    position: relative;
    border-radius: 5px;
    transition: background-color var(--transition-duration), color var(--transition-duration), transform 0.2s ease-out, box-shadow 0.2s ease-out;
    flex-shrink: 0;
    min-width: fit-content;
    box-sizing: border-box;
    white-space: nowrap;
    opacity: 0.6;
}

.hub-tab-btn.active {
    color: var(--text-color);
        opacity: 1;
}

.hub-tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--primary-accent);
    border-radius: 2px;
}

.hub-tab-btn.drag-over {
    background-color: var(--secondary-hover-bg);
    transform: scale(1.05);
    box-shadow: 0 0 15px color-mix(in srgb, var(--primary-accent) 40%, transparent);
}

.timeline-container { flex-grow: 1; width: calc(100% - 20px); margin-left: 0; box-sizing: border-box; overflow-x: hidden; position: relative; padding: 20px 0 20px 20px; }
.timeline-container::before { content: ''; position: absolute; top: 0; left: 20px; height: 100%; width: 4px; background: var(--glass-border2); border-radius: 2px; transition: background-color var(--transition-duration); }
.timeline-item { margin: 20px 0; padding-left: 30px; position: relative; opacity: 0; transform: translateX(-20px); box-sizing: border-box; width: 100%; word-break: break-word; }
.timeline-dot { content: ''; position: absolute; left: -6px; top: 5px; height: 20px; width: 20px; background: var(--primary-bg-opacity2); backdrop-filter: var(--glass-blur2); -webkit-backdrop-filter: var(--glass-blur2); border: 4px solid var(--primary-accent); border-radius: 50%; z-index: 1; transition: background-color var(--transition-duration), border-color var(--transition-duration); }
.timeline-content { background: var(--primary-bg-opacity2); backdrop-filter: var(--glass-blur2); -webkit-backdrop-filter: var(--glass-blur2); padding: 15px; border-radius: 8px; box-shadow: 0 8px 32px var(--glass-shadow2); border: 1px solid var(--glass-border2); transition: box-shadow var(--transition-duration), background-color var(--transition-duration), border-color var(--transition-duration); box-sizing: border-box; width: 100%; word-break: break-word; }
.timeline-content:hover { box-shadow: 0 12px 40px var(--glass-shadow2); }
.timeline-date { display: block; font-weight: 600; color: var(--subheading-color); margin-bottom: 5px; font-size: 0.9em; }
.timeline-page { font-weight: bold; color: var(--text-color); margin-bottom: 10px; }
.timeline-text { font-size: 0.95em; line-height: 1.5; color: var(--text-color); }

.cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    padding-top: 20px;
    width: 100%;
    box-sizing: border-box;
    overflow-x: hidden;
    align-content: start;
}

.no-highlights { font-size: 1.1em; font-weight: 500; color: var(--subheading-color); text-align: center; grid-column: 1 / -1; padding: 40px 20px; background-color: var(--primary-bg-opacity2); backdrop-filter: var(--glass-blur2); -webkit-backdrop-filter: var(--glass-blur2); border-radius: 8px; border: 2px dashed var(--glass-border2); box-shadow: 0 4px 12px var(--glass-shadow2); word-break: break-word; max-width: 100%; box-sizing: border-box; }

.highlight-card {
    background: var(--primary-bg-opacity2);
    backdrop-filter: var(--glass-blur2);
    -webkit-backdrop-filter: var(--glass-blur2);
    border-radius: 8px;
    box-shadow: 0 8px 32px var(--glass-shadow2);
    padding: 15px;
    border-left: 5px solid var(--primary-accent);
    cursor: grab;
    transition: box-shadow var(--transition-duration), transform var(--transition-duration), opacity var(--transition-duration), background-color var(--transition-duration), border-color var(--transition-duration);
    position: relative;
    display: flex;
    flex-direction: column;
    opacity: 0;
    transform: translateY(30px);
    border-right: 1px solid var(--glass-border2);
    border-top: 1px solid var(--glass-border2);
    border-bottom: 1px solid var(--glass-border2);
    box-sizing: border-box;
    min-width: 0;
    word-break: break-word;
}

.highlight-card:active {
    cursor: grabbing;
    transform: scale(1.03);
}

.highlight-card.dragging-source {
    opacity: 0.3;
    transform: scale(0.95);
}

.drag-ghost {
    position: absolute;
    left: -9999px; 
    background: var(--primary-bg-opacity2);
    backdrop-filter: var(--glass-blur2);
    -webkit-backdrop-filter: var(--glass-blur2);
    border: 1px solid var(--glass-border2);
    border-left: 5px solid var(--primary-accent);
    color: var(--text-color);
    border-radius: 8px;
    padding: 8px 15px;
    font-size: 0.9em;
    font-weight: 500;
    box-shadow: 0 8px 25px var(--glass-shadow2);
    pointer-events: none; 
    display: flex;
    align-items: center;
    gap: 8px;
    z-index: 9999;
}

.card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; flex-wrap: wrap; gap: 5px; width: 100%; box-sizing: border-box; }
.card-page-source { font-size: 0.8em; font-weight: 600; color: var(--subheading-color); background-color: var(--secondary-bg); padding: 3px 8px; border-radius: 10px; white-space: nowrap; flex-shrink: 0; }
.unhighlight-card-btn { background: none; border: none; font-size: 1.2em; color: var(--placeholder-color); cursor: pointer; padding: 5px; border-radius: 50%; line-height: 1; transition: color var(--transition-duration), background-color var(--transition-duration), transform var(--transition-duration); flex-shrink: 0; }
.unhighlight-card-btn:hover { color: var(--error-color); background-color: color-mix(in srgb, var(--error-color) 10%, transparent); transform: scale(1.1); }
.card-text { font-size: 0.95em; color: var(--text-color); line-height: 1.5; flex-grow: 1; word-break: break-word; }
.card-actions { margin-top: 15px; display: flex; gap: 10px; justify-content: flex-end; flex-wrap: wrap; width: 100%; box-sizing: border-box; }
.card-actions button { background-color: var(--secondary-bg); border: 1px solid var(--glass-border2); border-radius: 5px; padding: 6px 12px; font-size: 0.85em; font-weight: 500; cursor: pointer; transition: all var(--transition-duration) ease-in-out; color: var(--text-color); backdrop-filter: var(--glass-blur2); -webkit-backdrop-filter: var(--glass-blur2); box-shadow: 0 2px 8px var(--glass-shadow2); box-sizing: border-box; min-width: 0; }
.card-actions button:hover { transform: translateY(-2px); box-shadow: 0 4px 12px var(--glass-shadow2); background-color: var(--secondary-hover-bg); }
.card-actions button.restore-btn { background-color: var(--secondary-bg); border-color: var(--primary-accent); color: var(--primary-accent); }
.card-actions button.restore-btn:hover { background-color: var(--secondary-hover-bg); }
.card-actions button.delete-btn { background-color: var(--secondary-bg); border-color: var(--error-color); color: var(--error-color); }
.card-actions button.delete-btn:hover { background-color: var(--secondary-hover-bg); }

.farewell-message { text-align: center; padding: 20px; box-sizing: border-box; width: 100%; }
.farewell-message p { font-size: 1em; color: var(--subheading-color); font-style: italic; margin: 10px; word-break: break-word; }
.farewell-message i { font-size: 1.5em; margin-bottom: 10px; animation: star-twinkle 2s infinite ease-in-out; color: var(--text-color); }
.timeline-item.farewell-timeline-item .timeline-dot { display: none; }
.timeline-item.farewell-timeline-item { padding-left: 25px; }

/* ==========================================================================
   4. RESPONSIVE MEDIA QUERIES (HIGHLIGHT HUB SECTION)
   ========================================================================== */

@media (min-width: 768px) {
    .connect-highlight-hub-content {
        padding: 0 100px;
    }
}

@media (min-width: 900px) {
    .connect-highlight-hub-content {
        flex-direction: row;
        align-items: flex-start;
        justify-content: center;
        gap: clamp(2.5rem, 5vw, 5rem);
        padding: 0 clamp(2.5rem, 7.5vw, 5rem);
    }
    
    
    .hub-header {
        flex: 1;
        max-width: 350px;
        text-align: left;
        margin-top: 20px;
    }
    
    .hub-greeting-wrapper {
        display: block;
        text-align: left;
    }
  
    .hub-container {
        flex: 2;
        max-width: 800px;
        margin: 0;
    }

    #hub-greeting-sub {
        margin-top: 0;
    }

    #hub-sub-greeting {
        margin-top: 25px;
    }
}

@media (max-width: 1099px) {
  .scroll-down-arrow.hub-arrow,
  .scroll-up-arrow.hub-arrow-up {
    display: none;
  }
}

@media (max-width: 900px) {
    .highlights-panel {
        max-height: none;
        margin-bottom: 20px;
    }
    #hub-greeting-main,
    #hub-greeting-sub {
        font-size: 2em;
    }
}

@media (max-width: 767px) {
    .panel-header h2 { font-size: 1.3em; }
    .hub-tab-btn { font-size: 0.9em; padding: 6px 12px; }
    .cards-container { grid-template-columns: 1fr; }
    .timeline-container { padding: 15px 0 15px 10px; }
    .timeline-container::before { left: 10px; }
    .timeline-dot { left: 1px; }
    .timeline-item { padding-left: 40px; }
}

@media (max-width: 480px) {
    .connect-highlight-hub-content {
        padding: 0 40px;
    }
    #hub-greeting-main,
    #hub-greeting-sub {
        font-size: 1.8em;
    }
    .highlight-card { padding: 12px; }
    .card-page-source { font-size: 0.7em; padding: 2px 6px; }
    .unhighlight-card-btn { font-size: 1em; }
    .card-text { font-size: 0.85em; }
    .card-actions button { font-size: 0.75em; padding: 5px 10px; }
}