:root {
    --row-height: 60px;
    --track-width: 180px;
    --time-width: 100px;
    --header-height: 48px;
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --border: #e2e8f0;
    --text: #1e293b;
    --text-light: #64748b;
    --bg: #ffffff;
    --bg-hover: #f8fafc;
    --bg-gray: #f8fafc;
}

.ctt-timetable-root {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: var(--text);
    max-width: 100%;
    margin: 0 auto;
}

/* Controls */
.ctt-controls {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    padding: 16px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
}
.ctt-date-label { font-weight: 600; color: var(--text); }
.ctt-date-input {
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    background: white;
    cursor: pointer;
    transition: border-color 0.2s;
}
.ctt-date-input:hover { border-color: var(--primary); }
.ctt-date-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Wrapper */
.ctt-timetable-wrapper {
    display: flex;
    gap: 0;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    background: white;
}

/* Time column */
.ctt-time-panel {
    flex-shrink: 0;
    width: var(--time-width);
    border-right: 2px solid var(--border);
    background: #f8fafc;
}
.ctt-time-header {
    height: var(--header-height);
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 13px; text-transform: uppercase; letter-spacing: .5px;
    color: var(--text);
    border-bottom: 2px solid var(--border);
    background: #f1f5f9;
}
.ctt-time-slots { position: relative; }
.ctt-time-slot {
    display: flex; align-items: center; justify-content: center;
    font-size: 12px; font-weight: 600; color: var(--text-light);
    border-bottom: 1px solid #e2e8f0;
    padding: 4px; text-align: center; line-height: 1.2;
    box-sizing: border-box; /* Include padding in height calculation */
}
.ctt-time-slot.has-info-label {
    font-size: 11px; font-weight: 700; color: var(--primary-dark);
}

/* Content panel */
.ctt-content-panel { flex: 1; min-width: 0; overflow-x: auto; overflow-y: hidden; }
.ctt-track-headers {
    display: grid;
    grid-template-columns: repeat(6, minmax(var(--track-width), 1fr));
    height: var(--header-height);
    border-bottom: 2px solid var(--border);
    background: var(--bg-gray);
    min-width: calc(6 * var(--track-width));
}
.ctt-track-header {
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 13px; text-transform: uppercase; letter-spacing: .5px;
    color: #fff; border-right: 1px solid var(--border);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}
.ctt-track-header:last-child { border-right: none; }

.ctt-track-grid {
    display: grid;
    grid-template-columns: repeat(6, minmax(var(--track-width), 1fr));
    position: relative;
    min-width: calc(6 * var(--track-width));
}

/* Row guides */
.ctt-row-guides { position: absolute; top: 0; left: 0; right: 0; pointer-events: none; z-index: 0; }
.ctt-row-guide { height: var(--row-height); border-bottom: 1px solid #f1f5f9; }

/* Cards */
.ctt-card {
    position: absolute;
    left: 4px; right: 4px;
    background: linear-gradient(135deg, var(--bg) 0%, var(--bg-gray) 100%);
    border: 2px solid var(--border);
    color: var(--text);
    border-radius: 10px;
    padding: 12px;
    cursor: pointer;
    text-align: left;
    overflow: hidden;
    transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease, background .2s ease;
    box-shadow: 0 2px 4px rgba(0,0,0,.1);
    z-index: 10;
    display: flex; flex-direction: column; gap: 6px;
}
.ctt-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px rgba(0,0,0,.1);
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(37,99,235,.05) 0%, var(--bg) 100%);
    z-index: 20;
}
.ctt-card.has-org { padding-right: 48px; }
.ctt-card__avatar {
    position: absolute; right: 10px; top: 10px;
    width: 32px; height: 32px; border-radius: 50%;
    object-fit: cover; border: 2px solid var(--bg);
    box-shadow: 0 4px 6px rgba(0,0,0,.1);
}
.ctt-card__title {
    font-weight: 700; font-size: 13px; line-height: 1.3; color: var(--text);
    overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
}
.ctt-card__meta { font-size: 11px; color: var(--text-light); font-weight: 500; }
.ctt-card__speaker { font-size: 11px; color: var(--primary-dark); font-weight: 600; margin-top: 2px; }

/* Info blocks */
.ctt-info-block {
    position: absolute;
    padding: 12px 16px;
    text-align: center;
    font-weight: 700;
    font-size: 14px;
    border-radius: 4px;
    z-index: 1000; /* High z-index - Info Boxes appear above events */
    box-shadow: 0 1px 3px rgba(0,0,0,.1);
    box-sizing: border-box; /* Include padding in height calculation */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.ctt-info-block-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
}
.ctt-info-block-content {
    font-weight: 500; font-size: 12px; margin-top: 4px; opacity: .9;
}

/* Modal */
body.ctt-modal-open { overflow: hidden; }
.ctt-modal {
    position: fixed; inset: 0; z-index: 999999;
    display: flex; align-items: center; justify-content: center;
    padding: 20px; opacity: 0; visibility: hidden;
    transition: opacity .3s ease, visibility .3s ease;
}
.ctt-modal[hidden]{ display: none; }
.ctt-modal.is-open { opacity: 1; visibility: visible; }
.ctt-modal-backdrop {
    position: absolute; inset: 0; background: rgba(0,0,0,.5); backdrop-filter: blur(4px);
    opacity: 0; transition: opacity .3s ease;
}
.ctt-modal.is-open .ctt-modal-backdrop { opacity: 1; }
.ctt-modal-box {
    position: relative; background: white; border-radius: 16px;
    box-shadow: 0 25px 50px rgba(0,0,0,.25);
    max-width: 700px; width: 100%; max-height: 90vh; overflow-y: auto; z-index: 1;
    transform: translateY(20px) scale(.95); opacity: 0;
    transition: transform .3s cubic-bezier(.34,1.56,.64,1), opacity .3s ease;
}
.ctt-modal.is-open .ctt-modal-box { transform: translateY(0) scale(1); opacity: 1; }
.ctt-modal-box::-webkit-scrollbar { width: 8px; }
.ctt-modal-box::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 8px; }
.ctt-modal-header {
    position: sticky; top: 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white; padding: 24px 28px; border-radius: 16px 16px 0 0; z-index: 10;
}
.ctt-modal-close {
    position: absolute; top: 16px; right: 16px; width: 40px; height: 40px;
    border: none; background: rgba(255,255,255,.2); border-radius: 8px; cursor: pointer;
    font-size: 24px; color: white; display: flex; align-items: center; justify-content: center;
    transition: background .2s ease, transform .2s ease;
}
.ctt-modal-close:hover { background: rgba(255,255,255,.3); transform: rotate(90deg); }
.ctt-modal-title { margin: 0; font-size: 24px; font-weight: 700; line-height: 1.3; padding-right: 50px; }
.ctt-modal-meta {
    display: inline-block; background: rgba(255,255,255,.2); color: white;
    padding: 10px 16px; border-radius: 8px; font-size: 14px; font-weight: 600; margin-top: 12px;
    border-left: 3px solid rgba(255,255,255,.5);
}
.ctt-modal-body { padding: 28px; }
.ctt-modal-organizer {
    background: var(--bg-gray); border: 1px solid var(--border); border-radius: 12px; padding: 20px; margin-bottom: 24px;
}
.ctt-modal-organizer[aria-hidden="true"] { display: none; }
.ctt-org-stack { display: flex; gap: 16px; align-items: center; }
.ctt-org-avatar {
    width: 80px; height: 80px; border-radius: 50%; object-fit: cover;
    border: 3px solid var(--bg); box-shadow: 0 4px 6px rgba(0,0,0,.1); flex-shrink: 0;
}
.ctt-org-info { flex: 1; min-width: 0; }
.ctt-org-name { font-weight: 700; font-size: 18px; color: var(--text); margin-bottom: 4px; line-height: 1.3; }
.ctt-org-creds { font-size: 14px; color: var(--text-light); line-height: 1.5; margin-bottom: 8px; }
.ctt-org-linkedin {
    display: inline-flex; align-items: center; justify-content: center;
    width: 32px; height: 32px; padding: 0; background: #0077b5; color: white; text-decoration: none; border-radius: 6px;
    transition: background .2s;
}
.ctt-org-linkedin:hover { background: #006399; }
.ctt-org-linkedin svg { width: 18px; height: 18px; fill: currentColor; }

/* Responsive */
@media (max-width: 1024px) {
    :root { --track-width: 160px; }
}
@media (max-width: 768px) {
    :root { --track-width: 140px; --time-width: 80px; --row-height: 50px; }
    .ctt-controls { flex-direction: column; align-items: stretch; }
    .ctt-modal-box { max-width: 100%; max-height: 100vh; border-radius: 0; }
    .ctt-modal-header { border-radius: 0; }
    .ctt-card { padding: 6px 8px; font-size: 12px; }
    .ctt-card__title { font-size: 12px; }
    .ctt-card__meta, .ctt-card__speaker { font-size: 10px; }
    .ctt-card.has-org { padding-right: 42px; }
    .ctt-card__avatar { width: 28px; height: 28px; right: 6px; top: 6px; }
    .ctt-time-slot { font-size: 11px; }
}
@media (max-width: 480px) {
    :root { --track-width: 120px; --time-width: 70px; }
}