body.theme-cool {
    --festive-violet: #6d28d9;
    --festive-pink: #ec4899;
    --festive-orange: #f97316;
    --festive-yellow: #fbbf24;
    --festive-teal: #14b8a6;
    --festive-coral: #fb7185;

    --sidebar-bg: linear-gradient(165deg, #5b21b6 0%, #a21caf 48%, #ea580c 100%);
    --sidebar-text: rgba(255, 255, 255, 0.88);
    --sidebar-hover: rgba(255, 255, 255, 0.14);
    --sidebar-active: #f97316;
    --sidebar-active-bg: linear-gradient(135deg, #fbbf24 0%, #f97316 55%, #ec4899 100%);

    --main-bg: #fff8f0;
    --main-text: #3b1f4a;
    --border: #f3d9c6;
    --radius: 12px;
    --card-bg: #ffffff;
    --shadow-sm: 0 4px 14px rgba(109, 40, 217, 0.08);
    --shadow-md: 0 10px 28px rgba(236, 72, 153, 0.14);
    --accent: #ec4899;
    --accent-dark: #db2777;
    --btn-gradient: linear-gradient(135deg, #f97316 0%, #ec4899 100%);
    --festive-gradient: linear-gradient(90deg, #fbbf24, #ec4899, #f97316, #14b8a6);
}

body.theme-cool {
    font-family: "Nunito", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    background:
        radial-gradient(circle at 8% 12%, rgba(251, 191, 36, 0.18) 0%, transparent 42%),
        radial-gradient(circle at 92% 18%, rgba(236, 72, 153, 0.14) 0%, transparent 38%),
        radial-gradient(circle at 50% 95%, rgba(20, 184, 166, 0.12) 0%, transparent 40%),
        var(--main-bg);
}

body.theme-cool .sidebar {
    box-shadow: 4px 0 24px rgba(91, 33, 182, 0.2);
}

body.theme-cool .sidebar__title {
    font-family: "Fredoka", "Nunito", sans-serif;
}

body.theme-cool .sidebar__link {
    border-radius: 999px;
    font-weight: 600;
    transition: background 0.2s, color 0.2s, transform 0.15s;
}

body.theme-cool .sidebar__link:hover {
    transform: translateX(2px);
}

body.theme-cool .sidebar__link--active {
    background: var(--sidebar-active-bg);
    box-shadow: 0 4px 14px rgba(249, 115, 22, 0.35);
}

body.theme-cool .main__header {
    position: relative;
    background: rgba(255, 255, 255, 0.82);
    backdrop-filter: blur(10px);
}

body.theme-cool .main__header::after {
    content: "";
    position: absolute;
    left: 2rem;
    right: 2rem;
    bottom: 0;
    height: 3px;
    border-radius: 999px;
    background: var(--festive-gradient);
}

body.theme-cool .main__title {
    font-family: "Fredoka", "Nunito", sans-serif;
    font-size: 1.75rem;
    color: var(--festive-violet);
}

body.theme-cool .alert--success {
    background: linear-gradient(135deg, #ecfdf5 0%, #fef9c3 100%);
    color: #166534;
    border: 1px solid #86efac;
}

body.theme-cool .alert--error {
    background: linear-gradient(135deg, #fef2f2 0%, #fff7ed 100%);
}

body.theme-cool .form-group__input:focus {
    outline: 2px solid var(--festive-pink);
    border-color: var(--festive-pink);
}

body.theme-cool .btn {
    border-radius: 999px;
    font-weight: 700;
    font-family: inherit;
    transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
}

body.theme-cool .btn--primary {
    background: var(--btn-gradient);
    box-shadow: 0 4px 14px rgba(236, 72, 153, 0.3);
}

body.theme-cool .btn--primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(236, 72, 153, 0.38);
    background: var(--btn-gradient);
}

body.theme-cool .btn--danger {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    box-shadow: 0 4px 12px rgba(220, 38, 38, 0.25);
}

body.theme-cool .btn--danger:hover {
    transform: translateY(-1px);
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

body.theme-cool .btn--secondary {
    background: var(--card-bg);
    border: 2px solid var(--border);
}

body.theme-cool .btn--secondary:hover {
    background: #fff7ed;
    border-color: var(--festive-orange);
    color: var(--festive-orange);
}

body.theme-cool .admin-card {
    background: var(--card-bg);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

body.theme-cool .admin-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--festive-gradient);
}

body.theme-cool .admin-card__title {
    font-family: "Fredoka", "Nunito", sans-serif;
    color: var(--festive-violet);
}

body.theme-cool .admin-card--link {
    transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}

body.theme-cool .admin-card--link:hover {
    border-color: var(--festive-pink);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

body.theme-cool .admin-section__title {
    font-family: "Fredoka", "Nunito", sans-serif;
    color: var(--festive-violet);
}

body.theme-cool .programme-tabs__tab {
    border: 2px solid var(--border);
    border-radius: 999px;
    background: var(--card-bg);
    font-weight: 700;
    transition: background 0.2s, border-color 0.2s, color 0.2s, transform 0.15s;
}

body.theme-cool .programme-tabs__tab:hover {
    border-color: var(--festive-orange);
    color: var(--festive-orange);
    transform: translateY(-1px);
}

body.theme-cool .programme-tabs__tab--active {
    background: var(--sidebar-active-bg);
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(249, 115, 22, 0.3);
}

body.theme-cool .courses-tabs__add {
    border: none;
    border-radius: 999px;
    background: var(--btn-gradient);
    color: #fff;
    box-shadow: 0 4px 12px rgba(236, 72, 153, 0.3);
    transition: transform 0.15s, box-shadow 0.15s;
}

body.theme-cool .courses-tabs__add:hover,
body.theme-cool .courses-tabs__add[aria-expanded="true"] {
    transform: scale(1.06);
    box-shadow: 0 6px 16px rgba(236, 72, 153, 0.4);
    background: var(--btn-gradient);
    color: #fff;
}

body.theme-cool .participant-list__item {
    background: var(--card-bg);
    box-shadow: var(--shadow-sm);
}

body.theme-cool .participant-list__photo--placeholder {
    background: linear-gradient(135deg, #fbbf24 0%, #ec4899 100%);
    color: #fff;
}

body.theme-cool .participant-list__status,
body.theme-cool .participants-grid__status {
    background: linear-gradient(135deg, #fef3c7 0%, #fce7f3 100%);
    color: #be185d;
    font-weight: 700;
}

body.theme-cool .participants-grid__photo--placeholder {
    background: linear-gradient(135deg, #fbbf24 0%, #ec4899 100%);
    color: #fff;
}

body.theme-cool .todo-list__assignee {
    background: linear-gradient(135deg, #ccfbf1 0%, #fce7f3 100%);
    color: #0f766e;
    font-weight: 700;
}

body.theme-cool .lodgings-grid__dates {
    color: var(--festive-orange);
    font-weight: 700;
}

body.theme-cool .activity-list__item {
    background: var(--card-bg);
    box-shadow: var(--shadow-sm);
}

body.theme-cool .theme-switch__btn--active {
    background: var(--btn-gradient);
    border-color: transparent;
    color: #fff;
    box-shadow: 0 2px 8px rgba(236, 72, 153, 0.3);
}