.open-event-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 80px;
    font-size: 1.1rem;
    color: var(--text-secondary, #4b5563);
    gap: 12px;
}
.loading-spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--border-color-light, #d1d5db);
    border-top: 3px solid var(--primary-color, #38bdf8);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    display: inline-block;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
.app-container .main-content {
    align-items: start;
    grid-template-columns: minmax(0, 1fr) !important;
    gap: 18px;
}

.open-event-hero-section {
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.14), rgba(14, 165, 233, 0.08));
    border: 1px solid color-mix(in srgb, var(--info-color) 24%, var(--border-color));
}

.open-event-subtitle {
    margin: 0;
    color: var(--text-secondary, #4b5563);
}

.open-event-auth-notice {
    margin-top: 12px;
    display: grid;
    gap: 10px;
    font-size: 0.95rem;
    color: var(--text-secondary, #4b5563);
}

.open-event-auth-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.open-event-auth-actions .btn {
    min-width: 120px;
}

.open-event-confirm-msg {
    margin-bottom: 12px;
    color: var(--text-color);
    font-weight: 500;
}

.open-event-confirm-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

.open-event-status {
    font-weight: 600;
    color: var(--text-secondary, #4b5563);
}

#openEventListSection {
    border: 1px solid var(--border-color-light);
}

#openEventListSection .section-content {
    display: grid;
    gap: 12px;
}

.open-event-list {
    display: grid;
    gap: 12px;
    max-height: min(58vh, 720px);
    overflow-y: auto;
    padding-right: 2px;
}

.open-event-item {
    border: 1px solid var(--border-color, #d1d5db);
    border-radius: 12px;
    padding: 14px;
    background: var(--surface-elevated, #ffffff);
    cursor: pointer;
    transition: box-shadow 0.15s, border-color 0.15s;
}

.open-event-item:hover {
    border-color: color-mix(in srgb, var(--primary-color) 35%, var(--border-color));
    box-shadow: 0 2px 8px color-mix(in srgb, var(--primary-color) 10%, transparent);
}

.open-event-item.selected {
    border-color: color-mix(in srgb, var(--primary-color) 45%, var(--border-color));
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--primary-color) 18%, transparent);
}

.open-event-item-main {
    display: grid;
    gap: 8px;
}

.open-event-item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
}

.open-event-item-info {
    display: grid;
    gap: 6px;
    flex: 1;
    min-width: 0;
}

.open-event-item-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.open-event-desc-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--surface-1, #f9fafb);
    color: var(--text-color-light, #6b7280);
    cursor: pointer;
    font-size: 0.8rem;
    transition: transform 0.2s ease, background 0.15s;
    padding: 0;
}

.open-event-desc-toggle:hover {
    background: color-mix(in srgb, var(--primary-color) 10%, var(--surface-1));
    border-color: color-mix(in srgb, var(--primary-color) 30%, var(--border-color));
    color: var(--text-color);
}

.open-event-desc-toggle.open {
    transform: rotate(180deg);
}

.open-event-item-description-panel {
    padding-top: 2px;
}

.open-event-type-pill {
    margin: 0;
    display: inline-flex;
    width: fit-content;
    padding: 4px 10px;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.open-event-type-pill-event {
    background: color-mix(in srgb, var(--primary-color) 14%, var(--surface-elevated));
    border-color: color-mix(in srgb, var(--primary-color) 32%, var(--border-color));
    color: var(--text-color);
}

.open-event-type-pill-session {
    background: color-mix(in srgb, var(--success-color) 14%, var(--surface-elevated));
    border-color: color-mix(in srgb, var(--success-color) 28%, var(--border-color));
    color: var(--text-color);
}

.open-event-item-title {
    margin: 0;
    font-size: 1.05rem;
    color: var(--text-color, #111827);
}

.open-event-item-meta {
    margin: 0;
    color: var(--text-secondary, #4b5563);
}

.open-event-item-description {
    margin: 0;
    color: var(--text-color, #111827);
}

.open-event-meta {
    margin-bottom: 14px;
    color: var(--text-secondary, #4b5563);
    font-weight: 600;
}

.open-event-modal-content {
    width: min(940px, 94vw);
    max-width: 940px;
    border: 1px solid var(--border-color);
    border-radius: 14px;
    max-height: 88vh;
    overflow-y: auto;
}

#openEventDetailModal {
    z-index: 1105;
}

#openEventDetailModal .modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 8px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color-light);
}

#openEventDetailModal .section-content {
    padding: 0;
}

#openEventDetailModal .close {
    margin-left: auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 999px;
    border: 1px solid var(--border-color-light);
    color: var(--text-color-light);
    cursor: pointer;
    transition: var(--transition-colors), var(--transition-elevation);
}

#openEventDetailModal .close:hover {
    color: var(--text-color);
    background: color-mix(in srgb, var(--primary-color) 12%, var(--surface-elevated));
    border-color: color-mix(in srgb, var(--primary-color) 35%, var(--border-color));
}

#openEventDetailBody {
    display: grid;
    gap: 12px;
}

.open-event-slots {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.open-event-slot {
    border: 1px solid var(--border-color, #d1d5db);
    border-radius: 10px;
    padding: 10px;
    background: var(--surface-elevated, #ffffff);
    display: grid;
    gap: 6px;
}

.open-event-slot-label {
    margin: 0;
    font-weight: 600;
    color: var(--text-color, #111827);
}

.open-event-slot-state {
    margin: 0;
    font-size: 0.88rem;
    color: var(--text-secondary, #4b5563);
}

.open-event-slot button {
    width: 100%;
}

.open-event-slot.booked {
    background: color-mix(in srgb, var(--warning-color) 10%, var(--surface-elevated));
    border-color: color-mix(in srgb, var(--warning-color) 35%, var(--border-color));
}

.open-event-slot.past {
    background: color-mix(in srgb, var(--secondary-color) 10%, var(--surface-elevated));
    border-color: color-mix(in srgb, var(--secondary-color) 30%, var(--border-color));
}

.open-event-slot.mine {
    border-color: var(--info-color);
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--info-color) 18%, transparent);
    background: color-mix(in srgb, var(--info-color) 8%, var(--surface-elevated));
}

.open-event-future-list {
    margin-top: 14px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 12px;
}

.open-event-future-card {
    border: 1px solid var(--border-color, #d1d5db);
    border-radius: 12px;
    padding: 14px;
    background: linear-gradient(
        135deg,
        color-mix(in srgb, var(--surface-elevated, #ffffff) 92%, var(--warning-color) 8%),
        color-mix(in srgb, var(--surface-elevated, #ffffff) 94%, var(--info-color) 6%)
    );
}

.open-event-future-card h3 {
    margin: 0 0 8px;
    font-size: 1rem;
    color: var(--text-color, #111827);
}

.open-event-future-card p {
    margin: 0;
    color: var(--text-secondary, #4b5563);
}

.open-session-actions {
    margin-top: 10px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.open-session-comment-form {
    margin-top: 10px;
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 8px;
}

.open-session-comment-form input {
    width: 100%;
}

@media (max-width: 640px) {
    .app-container .main-content {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .open-event-item {
        flex-direction: column;
    }

    .open-event-slots {
        grid-template-columns: 1fr;
    }

    .open-session-comment-form {
        grid-template-columns: 1fr;
    }

    .open-event-list {
        max-height: none;
        overflow-y: visible;
    }

    .open-event-modal-content {
        width: min(100%, 96vw);
        padding: 18px;
    }
}

@media (min-width: 641px) and (max-width: 1100px) {
    .open-event-slots {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}