/* ============================================================
   Theorieplaner – Mobile-first modernes Design
   ============================================================ */

/* ── Design-Tokens ─────────────────────────────────────────── */
:root {
    --planner-primary:       #1e3a8a;
    --planner-primary-mid:   #1d4ed8;
    --planner-primary-light: #eff6ff;
    --planner-primary-muted: #bfdbfe;
    --planner-success:       #16a34a;
    --planner-warning:       #d97706;
    --planner-danger:        #dc2626;
    --planner-bg:            #f1f5f9;
    --planner-surface:       #ffffff;
    --planner-border:        #e2e8f0;
    --planner-text:          #0f172a;
    --planner-text-2:        #475569;
    --planner-text-3:        #94a3b8;
    --planner-radius-sm:     8px;
    --planner-radius:        14px;
    --planner-radius-lg:     20px;
    --planner-shadow:        0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
    --planner-shadow-md:     0 4px 12px rgba(0,0,0,.10), 0 2px 4px rgba(0,0,0,.06);
    --planner-shadow-lg:     0 16px 40px rgba(0,0,0,.18), 0 4px 8px rgba(0,0,0,.08);
    --planner-transition:    all .2s cubic-bezier(.4,0,.2,1);
}

/* ── Base ──────────────────────────────────────────────────── */
.planner-wrap *,
.planner-wrap *::before,
.planner-wrap *::after,
.planner-modal *,
.planner-modal *::before,
.planner-modal *::after {
    box-sizing: border-box;
}

.planner-wrap {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
                 "Helvetica Neue", Arial, sans-serif;
    font-size: 15px;
    color: var(--planner-text);
    background: var(--planner-bg);
    padding: 24px 16px 40px;
    min-height: 200px;
}

/* ── Filter-Leiste ─────────────────────────────────────────── */
.planner-filter {
    background: var(--planner-surface);
    border: 1px solid var(--planner-border);
    border-radius: var(--planner-radius);
    padding: 20px;
    margin-bottom: 28px;
    box-shadow: var(--planner-shadow);
    overflow: hidden; /* verhindert Überlauf bei iOS date-input */
    width: 100%;
    box-sizing: border-box;
}

.planner-filter__inner {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    align-items: flex-end;
    width: 100%;
    box-sizing: border-box;
}

.planner-filter__field {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1 1 180px;
    min-width: 0;
    max-width: 100%;
}

.planner-filter__field label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .05em;
    color: var(--planner-text-2);
}

.planner-filter__field label svg {
    opacity: .6;
    flex-shrink: 0;
}

.planner-filter__field input,
.planner-filter__field select {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    padding: 10px 13px;
    border: 1.5px solid var(--planner-border);
    border-radius: var(--planner-radius-sm);
    font-size: 16px; /* ≥16px verhindert Auto-Zoom auf iOS Safari */
    color: var(--planner-text);
    background: var(--planner-surface);
    transition: var(--planner-transition);
    height: 42px;
    box-sizing: border-box;
}

/* Flatpickr – verstecktes Original-Input ausblenden */
.planner-filter__field input#planner-filter-date {
    display: none !important;
}

/* Flatpickr altInput: gleiche Optik wie die anderen Filter-Inputs */
.planner-filter__field .flatpickr-input.form-control,
.planner-filter__field input.flatpickr-input {
    display: block;
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%239ca3af' stroke-width='2.5'%3E%3Crect x='3' y='4' width='18' height='18' rx='2'/%3E%3Cline x1='16' y1='2' x2='16' y2='6'/%3E%3Cline x1='8' y1='2' x2='8' y2='6'/%3E%3Cline x1='3' y1='10' x2='21' y2='10'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 34px;
}

.planner-filter__field input:focus,
.planner-filter__field select:focus {
    outline: none;
    border-color: var(--planner-primary-mid);
    box-shadow: 0 0 0 3px rgba(29,78,216,.15);
}

.planner-filter__actions {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-shrink: 0;
    flex-wrap: wrap;
}

/* ── Buttons ───────────────────────────────────────────────── */
.planner-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    padding: 10px 20px;
    border: 2px solid transparent;
    border-radius: var(--planner-radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--planner-transition);
    text-decoration: none;
    white-space: nowrap;
    line-height: 1;
    min-height: 42px;
    letter-spacing: .01em;
}

.planner-btn:focus-visible {
    outline: 3px solid var(--planner-primary-mid);
    outline-offset: 2px;
}

.planner-btn:active { transform: scale(.97); }

.planner-btn--primary {
    background: var(--planner-primary);
    color: #fff;
    border-color: var(--planner-primary);
}
.planner-btn--primary:hover,
.planner-btn--primary:focus {
    background: var(--planner-primary-mid);
    border-color: var(--planner-primary-mid);
    color: #fff;
    box-shadow: 0 4px 12px rgba(29,78,216,.35);
}

.planner-btn--ghost {
    background: transparent;
    color: var(--planner-text-2);
    border-color: var(--planner-border);
}
.planner-btn--ghost:hover {
    background: var(--planner-bg);
    color: var(--planner-text);
    border-color: #cbd5e1;
}

.planner-btn--disabled {
    background: #f1f5f9;
    color: var(--planner-text-3);
    border-color: var(--planner-border);
    cursor: not-allowed;
    opacity: .7;
}
.planner-btn--disabled:hover { transform: none; box-shadow: none; }

.planner-btn--full  { width: 100%; }
.planner-btn--book  { margin-top: 12px; }

.planner-btn--lg {
    padding: 13px 28px;
    font-size: 15px;
    min-height: 50px;
    border-radius: 10px;
}

/* ── Leere Ansicht ─────────────────────────────────────────── */
.planner-empty {
    text-align: center;
    padding: 64px 24px;
    color: var(--planner-text-3);
    background: var(--planner-surface);
    border-radius: var(--planner-radius);
    border: 1px dashed var(--planner-border);
}
.planner-empty svg {
    display: block;
    margin: 0 auto 18px;
    opacity: .35;
}
.planner-empty p {
    margin: 4px 0;
    font-size: 15px;
}

/* ── Skeleton-Loader ───────────────────────────────────────── */
.planner-skeleton-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 18px;
}
.planner-skeleton-card {
    background: var(--planner-surface);
    border-radius: var(--planner-radius);
    overflow: hidden;
    display: flex;
    height: 170px;
}
.planner-skeleton__badge {
    width: 80px;
    flex-shrink: 0;
    background: linear-gradient(90deg, #e2e8f0 25%, #f1f5f9 50%, #e2e8f0 75%);
    background-size: 200% 100%;
    animation: planner-shimmer 1.4s infinite;
}
.planner-skeleton__body {
    flex: 1;
    padding: 18px 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    justify-content: center;
}
.planner-skeleton__line {
    height: 12px;
    border-radius: 6px;
    background: linear-gradient(90deg, #e2e8f0 25%, #f1f5f9 50%, #e2e8f0 75%);
    background-size: 200% 100%;
    animation: planner-shimmer 1.4s infinite;
}
.planner-skeleton__line--title { height: 16px; width: 75%; }
.planner-skeleton__line--sm    { width: 55%; }

@keyframes planner-shimmer {
    0%   { background-position:  200% 0; }
    100% { background-position: -200% 0; }
}

/* ── Karten-Grid ───────────────────────────────────────────── */
.planner-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
    gap: 18px;
}

/* ── Unterrichts-Karte ─────────────────────────────────────── */
.planner-card {
    background: var(--planner-surface);
    border: 1px solid var(--planner-border);
    border-radius: var(--planner-radius);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--planner-shadow);
    transition: box-shadow .25s ease, transform .25s ease;
    position: relative;
}

.planner-card:not(.planner-card--full):hover {
    box-shadow: var(--planner-shadow-md);
    transform: translateY(-3px);
}

.planner-card--full { opacity: .65; }
.planner-card--full:hover { transform: none; }

/* Datum-Badge */
.planner-card__date {
    background: linear-gradient(160deg, var(--planner-primary) 0%, #1d4ed8 100%);
    color: #fff;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 0;
    padding: 14px 16px;
    flex-shrink: 0;
}

.planner-card__weekday {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .1em;
    opacity: .75;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    transform: rotate(180deg);
    margin-right: 8px;
    align-self: center;
}

.planner-card__day {
    font-size: 42px;
    font-weight: 800;
    line-height: 1;
    letter-spacing: -.02em;
}

.planner-card__month {
    font-size: 12px;
    font-weight: 600;
    opacity: .8;
    margin-left: 6px;
    align-self: flex-end;
    padding-bottom: 4px;
}

/* Body */
.planner-card__body {
    flex: 1;
    padding: 16px 18px 18px;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.planner-card__top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 10px;
}

.planner-card__title {
    font-size: 15px;
    font-weight: 700;
    color: var(--planner-primary);
    margin: 0;
    line-height: 1.35;
    flex: 1;
    min-width: 0;
}

/* Badges */
.planner-badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 700;
    white-space: nowrap;
    flex-shrink: 0;
    letter-spacing: .02em;
}
.planner-badge--ok  { background: #dcfce7; color: #15803d; }
.planner-badge--low { background: #fff7ed; color: #c2410c; }
.planner-badge--full{ background: #fef2f2; color: #b91c1c; }

/* Meta-Liste */
.planner-card__meta {
    list-style: none;
    margin: 0 0 12px;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 5px;
}
.planner-card__meta li {
    display: flex;
    align-items: center;
    gap: 7px;
    font-size: 13px;
    color: var(--planner-text-2);
    line-height: 1.4;
}
.planner-card__meta li svg {
    flex-shrink: 0;
    color: var(--planner-primary-mid);
    opacity: .7;
}

/* Auslastungs-Balken */
.planner-bar {
    height: 6px;
    background: #e2e8f0;
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 6px;
}
.planner-bar__fill {
    height: 100%;
    background: linear-gradient(90deg, #1d4ed8, #3b82f6);
    border-radius: 3px;
    transition: width .5s ease;
}
.planner-bar__fill--warn {
    background: linear-gradient(90deg, #c2410c, #f97316);
}

.planner-card__seats {
    font-size: 12px;
    color: var(--planner-text-3);
    margin: 0 0 4px;
}
.planner-card__seats strong { color: var(--planner-text-2); }

.planner-card__address {
    font-size: 12px;
    color: var(--planner-text-3);
    display: block;
    margin-top: 2px;
}

/* Horizontales Layout auf größeren Screens */
@media (min-width: 500px) {
    .planner-card {
        flex-direction: row;
    }
    .planner-card__date {
        flex-direction: column;
        align-items: center;
        justify-content: center;
        width: 78px;
        padding: 18px 10px;
        gap: 2px;
    }
    .planner-card__weekday {
        writing-mode: horizontal-tb;
        transform: none;
        margin-right: 0;
        margin-bottom: 4px;
        align-self: auto;
    }
    .planner-card__day { font-size: 36px; }
    .planner-card__month {
        margin-left: 0;
        align-self: auto;
        padding-bottom: 0;
        font-size: 11px;
        text-align: center;
    }
}

/* ── Modal ─────────────────────────────────────────────────── */
.planner-modal {
    position: fixed;
    inset: 0;
    z-index: 999999;
    display: flex;
    align-items: flex-end;       /* mobile: bottom-sheet */
    justify-content: center;
}
.planner-modal[hidden] { display: none; }

.planner-modal__overlay {
    position: absolute;
    inset: 0;
    background: rgba(15,23,42,.6);
    /* Firefox <103 fallback: kein backdrop-filter, aber opaker Overlay */
    background: rgba(15,23,42,.72);
    -webkit-backdrop-filter: blur(3px);
    backdrop-filter: blur(3px);
    cursor: pointer;
}

.planner-modal__sheet {
    position: relative;
    z-index: 1;
    background: var(--planner-surface);
    width: 100%;
    max-height: 95vh;        /* Fallback für ältere Browser */
    max-height: 95dvh;       /* Berücksichtigt mobile Browser-UI (Adressleiste) */
    border-radius: var(--planner-radius-lg) var(--planner-radius-lg) 0 0;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch; /* Momentum-Scrolling auf älterem iOS */
    overscroll-behavior: contain;
    box-shadow: var(--planner-shadow-lg);
    animation: planner-slide-up .28s cubic-bezier(.32,0,.67,0);
    /* Safe Area für iPhone-Notch / Home-Indicator */
    padding-bottom: env(safe-area-inset-bottom, 0px);
}

@keyframes planner-slide-up {
    from { transform: translateY(100%); opacity: 0; }
    to   { transform: translateY(0);    opacity: 1; }
}

/* Desktop: zentrierter Dialog */
@media (min-width: 640px) {
    .planner-modal {
        align-items: center;
        padding: 16px;
    }
    .planner-modal__sheet {
        width: 100%;
        max-width: 480px;
        max-height: 92vh;    /* Fallback */
        max-height: 92dvh;
        border-radius: var(--planner-radius-lg);
        padding-bottom: 0;   /* Safe-Area nur auf Mobile nötig */
        animation: planner-zoom-in .22s cubic-bezier(.34,1.36,.64,1);
    }
    @keyframes planner-zoom-in {
        from { transform: scale(.9) translateY(12px); opacity: 0; }
        to   { transform: scale(1) translateY(0);     opacity: 1; }
    }
}

/* Modal-Header */
.planner-modal__header {
    background: linear-gradient(135deg, var(--planner-primary) 0%, #1d4ed8 100%);
    padding: 24px 24px 20px;
    border-radius: inherit;
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
    position: sticky;
    top: 0;
    z-index: 2;
}

.planner-modal__header h2 {
    margin: 0 0 12px;
    font-size: 19px;
    font-weight: 700;
    color: #fff;
    line-height: 1.3;
    padding-right: 32px;
}

.planner-modal__lesson-info {
    background: rgba(255,255,255,.13);
    border-radius: 10px;
    padding: 12px 14px;
    display: flex;
    flex-direction: column;
    gap: 5px;
    font-size: 13px;
    color: rgba(255,255,255,.9);
}
.planner-modal__lesson-info strong {
    font-size: 14px;
    color: #fff;
    display: block;
    margin-bottom: 2px;
}
.planner-modal__lesson-info span {
    display: flex;
    align-items: center;
    gap: 7px;
}

/* Close-Button */
.planner-modal__close {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 36px;
    height: 36px;
    border: none;
    background: rgba(255,255,255,.18);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    transition: background .15s;
    z-index: 3;
    padding: 0;
    line-height: 1;
    flex-shrink: 0;
}
.planner-modal__close:hover { background: rgba(255,255,255,.3); }
.planner-modal__close svg {
    display: block;
    width: 18px;
    height: 18px;
    min-width: 18px;
    min-height: 18px;
    flex-shrink: 0;
    pointer-events: none;
    stroke: #fff;
    overflow: visible;
}

/* Modal-Body */
.planner-modal__body {
    padding: 24px;
}

/* ── Spam-Schutz: Honeypot verstecken ─────────────────────── */
.planner-hp-wrap {
    position: fixed;
    top: -9999px;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
    opacity: 0;
    pointer-events: none;
    z-index: -9999;
}

/* ── Formular ──────────────────────────────────────────────── */
.planner-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 18px;
}

.planner-field label {
    font-size: 13px;
    font-weight: 700;
    color: var(--planner-text-2);
    letter-spacing: .01em;
}

.planner-required { color: var(--planner-danger); margin-left: 2px; }

.planner-field input {
    width: 100%;
    padding: 11px 14px;
    border: 1.5px solid var(--planner-border);
    border-radius: var(--planner-radius-sm);
    font-size: 16px; /* ≥16px verhindert Auto-Zoom auf iOS Safari */
    color: var(--planner-text);
    background: #fff;
    transition: var(--planner-transition);
    -webkit-appearance: none;
    appearance: none;
}

.planner-field input:focus {
    outline: none;
    border-color: var(--planner-primary-mid);
    box-shadow: 0 0 0 3px rgba(29,78,216,.14);
}

.planner-field input.planner-input--error {
    border-color: var(--planner-danger);
    box-shadow: 0 0 0 3px rgba(220,38,38,.12);
}

/* Notice */
.planner-notice {
    padding: 11px 14px;
    border-radius: var(--planner-radius-sm);
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 18px;
    line-height: 1.5;
}
.planner-notice[hidden] { display: none; }
.planner-notice--error   { background: #fef2f2; color: #991b1b; border: 1px solid #fca5a5; }
.planner-notice--success { background: #f0fdf4; color: #166534; border: 1px solid #86efac; }

.planner-form-hint {
    font-size: 12px;
    color: var(--planner-text-3);
    text-align: center;
    margin: 10px 0 0;
    line-height: 1.5;
}

/* ── Modul-Formular ────────────────────────────────────── */
.planner-form-section-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--planner-text-1);
    margin: 20px 0 10px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--planner-border);
}
.planner-module-notice {
    background: #eff6ff;
    border-left: 3px solid var(--planner-primary);
    border-radius: 0 6px 6px 0;
    padding: 10px 14px;
    font-size: 13px;
    color: #1e40af;
    line-height: 1.6;
    margin-bottom: 16px;
}
.planner-participant-field {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
}
.planner-participant-field label {
    font-size: 12px;
    font-weight: 600;
    color: var(--planner-text-2);
    min-width: 90px;
    flex-shrink: 0;
}
.planner-participant-field input {
    flex: 1;
}

/* ── Erfolgs-Ansicht ───────────────────────────────────────── */
.planner-success {
    text-align: center;
    padding: 16px 8px 24px;
}
.planner-success[hidden] { display: none; }

.planner-success__icon {
    width: 72px;
    height: 72px;
    color: var(--planner-success);
    margin: 0 auto 20px;
    animation: planner-pop .4s cubic-bezier(.34,1.56,.64,1);
}
@keyframes planner-pop {
    from { transform: scale(0); opacity: 0; }
    to   { transform: scale(1); opacity: 1; }
}
.planner-success__icon svg { width: 100%; height: 100%; }
.planner-success h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--planner-primary);
    margin: 0 0 8px;
}
.planner-success p {
    color: var(--planner-text-2);
    font-size: 14px;
    margin: 0 0 24px;
    line-height: 1.6;
}

/* ── reduced-motion ────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
    .planner-modal__sheet,
    .planner-card,
    .planner-success__icon { animation: none; transition: none; }
    .planner-skeleton__badge,
    .planner-skeleton__line { animation: none; }
}

/* ── Responsive Tweaks ─────────────────────────────────────── */
@media (max-width: 768px) {
    .planner-wrap { padding: 16px 12px 32px; }
    .planner-filter { padding: 16px; }
    .planner-filter__inner { flex-direction: column; gap: 12px; }
    .planner-filter__field { flex: unset; width: 100%; max-width: 100%; min-width: 0; }
    .planner-filter__field input,
    .planner-filter__field select { width: 100% !important; max-width: 100% !important; }
    .planner-filter__actions { width: 100%; }
    .planner-filter__actions .planner-btn { flex: 1; }
    .planner-modal__body { padding: 18px 16px; }
    /* iOS: 16px verhindert Auto-Zoom beim Antippen des Inputs */
    .planner-field input { font-size: 16px; }
}

/* Sehr kleine Screens (z.B. iPhone SE 1. Gen, 320px) */
@media (max-width: 400px) {
    .planner-modal__header { padding: 20px 16px 16px; }
    .planner-modal__header h2 { font-size: 17px; padding-right: 42px; }
    .planner-modal__lesson-info { font-size: 12px; padding: 10px 12px; }
    .planner-modal__close { top: 12px; right: 12px; }
}

@media (max-width: 340px) {
    .planner-card__day { font-size: 30px; }
    .planner-btn--lg   { font-size: 15px; padding: 12px 16px; }
}