/* ============================================================
   Thermogrid Buchungskalender — Styles
   Professionelles Design im Thermogrid-Stil
   ============================================================ */

:root {
    --tg-primary: #E85147;
    --tg-primary-dark: #d4453c;
    --tg-primary-light: #fef2f2;
    --tg-primary-lighter: #fff5f5;
    --tg-gray-50: #f9fafb;
    --tg-gray-100: #f3f4f6;
    --tg-gray-200: #e5e7eb;
    --tg-gray-300: #d1d5db;
    --tg-gray-400: #9ca3af;
    --tg-gray-500: #6b7280;
    --tg-gray-600: #4b5563;
    --tg-gray-700: #374151;
    --tg-gray-800: #1f2937;
    --tg-gray-900: #111827;
    --tg-green: #15803d;
    --tg-green-light: #f0fdf4;
    --tg-green-border: #bbf7d0;
    --tg-blue: #1e40af;
    --tg-blue-light: #eff6ff;
    --tg-radius: 12px;
    --tg-radius-sm: 8px;
    --tg-shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --tg-shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
    --tg-shadow-lg: 0 10px 25px rgba(0,0,0,0.08), 0 4px 10px rgba(0,0,0,0.06);
}

/* Reset */
.tg-booking *,
.tg-booking *::before,
.tg-booking *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

.tg-booking {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--tg-gray-700);
    max-width: 860px;
    margin: 0 auto;
    padding: 0 16px;
}

/* ============================================================
   Hero-Banner (Fade-In)
   ============================================================ */

.tg-hero-banner {
    background: linear-gradient(135deg, var(--tg-primary), var(--tg-primary-dark));
    border-radius: var(--tg-radius);
    padding: 32px 28px;
    margin-bottom: 28px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.tg-hero-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 300px;
    height: 300px;
    background: rgba(255,255,255,0.06);
    border-radius: 50%;
    pointer-events: none;
}

.tg-hero-banner__badge {
    display: inline-block;
    background: rgba(255,255,255,0.2);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    padding: 4px 14px;
    border-radius: 20px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-bottom: 14px;
}

.tg-hero-banner__title {
    font-size: 24px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
    line-height: 1.3;
}

.tg-hero-banner__subtitle {
    font-size: 15px;
    color: rgba(255,255,255,0.85);
    line-height: 1.5;
    font-weight: 400;
}

/* Fade-In Animation */
.tg-fade-in {
    opacity: 0;
    transform: translateY(12px);
    animation: tgFadeIn 0.7s ease-out 0.15s forwards;
}

@keyframes tgFadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================================
   Header
   ============================================================ */

.tg-header {
    margin-bottom: 28px;
}

.tg-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--tg-gray-900);
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.tg-subtitle {
    font-size: 15px;
    color: var(--tg-gray-500);
    line-height: 1.5;
}

/* ============================================================
   Kalender
   ============================================================ */

.tg-calendar-wrapper {
    display: flex;
    gap: 24px;
    align-items: flex-start;
}

@media (max-width: 680px) {
    .tg-calendar-wrapper {
        flex-direction: column;
    }
}

.tg-calendar {
    background: #fff;
    border: 1px solid var(--tg-gray-200);
    border-radius: var(--tg-radius);
    padding: 24px;
    box-shadow: var(--tg-shadow-md);
    min-width: 360px;
    flex-shrink: 0;
}

.tg-calendar__nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    padding: 0 4px;
}

.tg-calendar__month {
    font-size: 18px;
    font-weight: 700;
    color: var(--tg-gray-900);
    letter-spacing: -0.01em;
}

.tg-calendar__nav-btn {
    width: 40px;
    height: 40px;
    border: 1px solid var(--tg-gray-200);
    border-radius: var(--tg-radius-sm);
    background: #fff;
    color: var(--tg-gray-700);
    font-size: 22px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
}

.tg-calendar__nav-btn:hover {
    background: var(--tg-gray-50);
    border-color: var(--tg-gray-300);
}

.tg-calendar__nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.tg-calendar__weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
    margin-bottom: 8px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--tg-gray-100);
}

.tg-calendar__weekdays span {
    text-align: center;
    font-size: 12px;
    font-weight: 700;
    color: var(--tg-gray-400);
    padding: 4px 0;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tg-calendar__grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 6px;
}

.tg-calendar__day {
    width: 100%;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    font-weight: 400;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: default;
    transition: all 0.2s ease;
    background: none;
    color: var(--tg-gray-300);
    min-height: 48px;
}

.tg-calendar__day--empty {
    visibility: hidden;
}

.tg-calendar__day--available {
    color: var(--tg-gray-800);
    font-weight: 600;
    cursor: pointer;
    background: var(--tg-primary-lighter);
    border-color: rgba(232, 81, 71, 0.15);
}

.tg-calendar__day--available:hover {
    background: var(--tg-primary-light);
    border-color: var(--tg-primary);
    color: var(--tg-primary);
    transform: scale(1.12);
    box-shadow: 0 2px 8px rgba(232, 81, 71, 0.2);
}

.tg-calendar__day--selected {
    background: var(--tg-primary) !important;
    color: #fff !important;
    font-weight: 700;
    border-color: var(--tg-primary-dark) !important;
    box-shadow: 0 3px 12px rgba(232, 81, 71, 0.4);
    transform: scale(1.12);
}

.tg-calendar__day--today {
    border-color: var(--tg-primary);
    color: var(--tg-primary);
    font-weight: 700;
}

.tg-calendar__day--today.tg-calendar__day--available {
    background: var(--tg-primary-light);
    border-color: var(--tg-primary);
}

/* ============================================================
   Zeitfenster (Slots)
   ============================================================ */

.tg-slots {
    flex: 1;
    background: #fff;
    border: 1px solid var(--tg-gray-200);
    border-radius: var(--tg-radius);
    padding: 24px;
    box-shadow: var(--tg-shadow-md);
    min-width: 0;
}

.tg-slots__title {
    font-size: 16px;
    font-weight: 700;
    color: var(--tg-gray-900);
    margin-bottom: 6px;
}

.tg-slots__subtitle {
    font-size: 13px;
    color: var(--tg-gray-400);
    margin-bottom: 16px;
}

.tg-slots__list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 8px;
}

.tg-slots__btn {
    padding: 14px 10px;
    border: 2px solid var(--tg-gray-200);
    border-radius: var(--tg-radius-sm);
    background: #fff;
    color: var(--tg-gray-700);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

.tg-slots__btn:hover {
    border-color: var(--tg-primary);
    color: var(--tg-primary);
    background: var(--tg-primary-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(232, 81, 71, 0.2);
}

.tg-slots__btn--selected {
    background: var(--tg-primary) !important;
    color: #fff !important;
    border-color: var(--tg-primary-dark) !important;
    font-weight: 700;
    box-shadow: 0 4px 14px rgba(232, 81, 71, 0.4);
    transform: translateY(-2px);
}

.tg-slots__empty {
    text-align: center;
    color: var(--tg-gray-500);
    font-size: 14px;
    padding: 32px 0;
    line-height: 1.6;
}

.tg-slots__loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: var(--tg-gray-500);
    font-size: 14px;
    padding: 32px 0;
}

/* ============================================================
   Formular
   ============================================================ */

.tg-back-btn {
    background: none;
    border: none;
    color: var(--tg-primary);
    font-size: 14px;
    cursor: pointer;
    padding: 0;
    margin-bottom: 16px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.tg-back-btn:hover {
    text-decoration: underline;
}

.tg-selected-summary {
    background: linear-gradient(135deg, var(--tg-primary-light), #fff);
    border: 1.5px solid #fecaca;
    border-radius: var(--tg-radius-sm);
    padding: 16px 20px;
    font-size: 15px;
    color: var(--tg-gray-700);
    margin-top: 16px;
    line-height: 1.6;
}

.tg-form {
    background: #fff;
    border: 1px solid var(--tg-gray-200);
    border-radius: var(--tg-radius);
    padding: 28px;
    box-shadow: var(--tg-shadow-md);
}

.tg-form__group {
    margin-bottom: 22px;
}

.tg-form__label {
    display: block;
    font-size: 14px;
    font-weight: 700;
    color: var(--tg-gray-700);
    margin-bottom: 8px;
}

.tg-form__input,
.tg-form__textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--tg-gray-200);
    border-radius: var(--tg-radius-sm);
    font-size: 15px;
    color: var(--tg-gray-900);
    background: #fff;
    transition: border-color 0.15s, box-shadow 0.15s;
    font-family: inherit;
}

.tg-form__input:focus,
.tg-form__textarea:focus {
    outline: none;
    border-color: var(--tg-primary);
    box-shadow: 0 0 0 3px rgba(232, 81, 71, 0.1);
}

.tg-form__input::placeholder,
.tg-form__textarea::placeholder {
    color: var(--tg-gray-400);
}

.tg-form__input--error {
    border-color: var(--tg-primary) !important;
    box-shadow: 0 0 0 3px rgba(232, 81, 71, 0.1) !important;
}

/* Radio Buttons (Telefon / Video) */
.tg-form__radio-group {
    display: flex;
    gap: 12px;
}

@media (max-width: 480px) {
    .tg-form__radio-group {
        flex-direction: column;
    }
}

.tg-form__radio {
    flex: 1;
    cursor: pointer;
}

.tg-form__radio input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.tg-form__radio-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 20px 12px;
    border: 2px solid var(--tg-gray-200);
    border-radius: var(--tg-radius);
    transition: all 0.15s;
    text-align: center;
}

.tg-form__radio input:checked + .tg-form__radio-box {
    border-color: var(--tg-primary);
    background: var(--tg-primary-light);
    box-shadow: 0 0 0 3px rgba(232, 81, 71, 0.1);
}

.tg-form__radio-box:hover {
    border-color: var(--tg-gray-300);
    background: var(--tg-gray-50);
}

.tg-form__radio-icon {
    font-size: 28px;
}

.tg-form__radio-text {
    font-size: 15px;
    font-weight: 700;
    color: var(--tg-gray-900);
}

.tg-form__radio-desc {
    font-size: 12px;
    color: var(--tg-gray-500);
}

/* Datenschutz-Hinweis (prominent) */
.tg-form__data-notice {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px 20px;
    background: var(--tg-green-light);
    border: 1.5px solid var(--tg-green-border);
    border-radius: var(--tg-radius-sm);
    margin-bottom: 16px;
}

.tg-calendar-notice {
    margin-top: 20px;
}

.tg-form__data-notice-icon {
    flex-shrink: 0;
    margin-top: 2px;
}

.tg-form__data-notice-text {
    font-size: 13px;
    color: var(--tg-green);
    line-height: 1.6;
}

.tg-form__data-notice-text strong {
    color: #166534;
    font-size: 14px;
}

.tg-form__zoom-notice {
    padding: 10px 16px;
    background: var(--tg-blue-light);
    border: 1px solid #bfdbfe;
    border-radius: var(--tg-radius-sm);
    font-size: 12px;
    color: var(--tg-blue);
    line-height: 1.5;
    margin-bottom: 16px;
}

/* Checkbox */
.tg-form__checkbox {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    cursor: pointer;
    font-size: 13px;
    color: var(--tg-gray-600);
    line-height: 1.5;
}

.tg-form__checkbox input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.tg-form__checkbox-mark {
    width: 22px;
    height: 22px;
    min-width: 22px;
    border: 2px solid var(--tg-gray-300);
    border-radius: 6px;
    background: #fff;
    position: relative;
    transition: all 0.15s;
    margin-top: 1px;
}

.tg-form__checkbox input:checked + .tg-form__checkbox-mark {
    background: var(--tg-primary);
    border-color: var(--tg-primary);
}

.tg-form__checkbox input:checked + .tg-form__checkbox-mark::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 2px;
    width: 6px;
    height: 11px;
    border: solid #fff;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.tg-form__checkbox-text a {
    color: var(--tg-primary);
    text-decoration: none;
    font-weight: 600;
}

.tg-form__checkbox-text a:hover {
    text-decoration: underline;
}

.tg-form__privacy-text {
    margin-top: 10px;
    margin-left: 32px;
    padding: 12px 16px;
    background: var(--tg-gray-50);
    border: 1px solid var(--tg-gray-200);
    border-radius: var(--tg-radius-sm);
    font-size: 12px;
    color: var(--tg-gray-500);
    line-height: 1.6;
}

/* Error */
.tg-form__error {
    background: var(--tg-primary-light);
    border: 1.5px solid #fecaca;
    border-radius: var(--tg-radius-sm);
    padding: 14px 18px;
    font-size: 13px;
    color: var(--tg-primary-dark);
    margin-bottom: 16px;
    line-height: 1.6;
}

/* Submit Button */
.tg-form__submit {
    width: 100%;
    padding: 16px 24px;
    background: linear-gradient(135deg, var(--tg-primary), var(--tg-primary-dark));
    color: #fff;
    border: none;
    border-radius: var(--tg-radius-sm);
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.15s;
    font-family: inherit;
    box-shadow: 0 2px 8px rgba(232, 81, 71, 0.3);
    letter-spacing: 0.01em;
}

.tg-form__submit:hover {
    background: linear-gradient(135deg, var(--tg-primary-dark), #c93c33);
    box-shadow: 0 4px 12px rgba(232, 81, 71, 0.4);
    transform: translateY(-1px);
}

.tg-form__submit:disabled {
    background: var(--tg-gray-300);
    box-shadow: none;
    cursor: not-allowed;
    transform: none;
}

/* ============================================================
   Erfolgs-Anzeige
   ============================================================ */

.tg-success {
    text-align: center;
    padding: 56px 28px;
    background: #fff;
    border: 1px solid var(--tg-gray-200);
    border-radius: var(--tg-radius);
    box-shadow: var(--tg-shadow-md);
}

.tg-success__icon {
    width: 72px;
    height: 72px;
    background: var(--tg-green-light);
    color: var(--tg-green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    font-weight: 700;
    margin: 0 auto 24px;
    border: 2px solid var(--tg-green-border);
}

.tg-success__title {
    font-size: 24px;
    font-weight: 700;
    color: var(--tg-gray-900);
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.tg-success__text {
    font-size: 15px;
    color: var(--tg-gray-500);
    line-height: 1.6;
    max-width: 420px;
    margin: 0 auto 28px;
}

.tg-success__details {
    background: var(--tg-gray-50);
    border: 1px solid var(--tg-gray-200);
    border-radius: var(--tg-radius-sm);
    padding: 20px 24px;
    display: inline-block;
    text-align: left;
    font-size: 14px;
    color: var(--tg-gray-700);
    line-height: 1.8;
    margin-bottom: 28px;
}

.tg-success__btn {
    padding: 12px 28px;
    background: none;
    border: 1.5px solid var(--tg-gray-200);
    border-radius: var(--tg-radius-sm);
    color: var(--tg-gray-700);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
    font-family: inherit;
}

.tg-success__btn:hover {
    border-color: var(--tg-gray-300);
    background: var(--tg-gray-50);
}

/* ============================================================
   Spinner
   ============================================================ */

.tg-spinner {
    width: 22px;
    height: 22px;
    border: 2.5px solid var(--tg-gray-200);
    border-top-color: var(--tg-primary);
    border-radius: 50%;
    animation: tg-spin 0.6s linear infinite;
    display: inline-block;
}

.tg-spinner--small {
    width: 16px;
    height: 16px;
    vertical-align: middle;
    border-color: rgba(255,255,255,0.3);
    border-top-color: #fff;
}

@keyframes tg-spin {
    to { transform: rotate(360deg); }
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 680px) {
    .tg-hero-banner {
        padding: 24px 20px;
    }
    
    .tg-hero-banner__title {
        font-size: 20px;
    }
    
    .tg-title {
        font-size: 19px;
    }
    
    .tg-calendar {
        min-width: 0;
        width: 100%;
    }
    
    .tg-calendar__day {
        min-height: 42px;
        font-size: 14px;
    }
    
    .tg-slots__list {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .tg-form {
        padding: 20px;
    }
}