/* ============================================================
   Bewirtungskosten – External Stylesheet
   Dark/Light Theme: CSS-Variablen nach Dark-Light-CSS Standard
   ============================================================ */

:root {
    color-scheme: light dark;

    /* Light Mode (default) */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #f0f1f3;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-tertiary: #888888;
    --border-color: #e0e0e0;
    --border-color-strong: #cccccc;

    --color-primary: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;

    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 25px rgba(0, 0, 0, 0.15);
}

@media (prefers-color-scheme: dark) {
    :root:not(.light-mode) {
        /* Dark Mode */
        --bg-primary: #1a1d23;
        --bg-secondary: #2f3436;
        --bg-tertiary: #2f3436;
        --text-primary: #ffffff;
        --text-secondary: #a3a3a3;
        --text-tertiary: #808080;
        --border-color: #444444;
        --border-color-strong: #2f3436;

        --color-primary: #33cc33;
        --color-warning: #fbbf24;
        --color-error: #ff6b6b;
        --color-info: #87ceeb;

        --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
        --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.4);
        --shadow-lg: 0 8px 25px rgba(0, 0, 0, 0.7);
    }
}

:root.dark-mode {
    /* Dark Mode (forced) */
    --bg-primary: #1a1d23;
    --bg-secondary: #2f3436;
    --bg-tertiary: #2f3436;
    --text-primary: #ffffff;
    --text-secondary: #a3a3a3;
    --text-tertiary: #808080;
    --border-color: #444444;
    --border-color-strong: #2f3436;

    --color-primary: #33cc33;
    --color-warning: #fbbf24;
    --color-error: #ff6b6b;
    --color-info: #87ceeb;

    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 25px rgba(0, 0, 0, 0.7);
}

:root.light-mode {
    /* Light Mode (forced) */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #f0f1f3;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-tertiary: #888888;
    --border-color: #e0e0e0;
    --border-color-strong: #cccccc;

    --color-primary: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;

    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 25px rgba(0, 0, 0, 0.15);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
    background: var(--bg-primary);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* ---- Lang-Change-Bar ---- */
.lang-change-bar {
    padding: 8px 16px;
    background-color: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    border-bottom: 1px solid var(--border-color);
}

.lang-change-bar > button:nth-of-type(1) {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.change-language-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 16px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 13px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    transition: all 0.2s ease;
}

.change-language-btn:hover {
    background-color: var(--color-primary);
    color: var(--bg-primary);
    border-color: var(--color-primary);
}

.current-flag {
    width: 24px;
    height: auto;
    border-radius: 3px;
    display: block;
}

/* ---- Container ---- */
.container {
    width: 100%;
    margin: 0;
    border-radius: 0;
    box-shadow: none;
    overflow: hidden;
    min-height: 100vh;
}

/* ---- Page Header ---- */
.header {
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
    padding: 25px 15px;
    text-align: center;
    color: var(--text-primary);
}

.header h1 {
    font-size: 1.8em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px var(--shadow-sm);
    color: var(--text-primary);
    font-weight: bold;
    line-height: 1.2;
}

.header p {
    font-size: 0.95em;
    opacity: 0.9;
    color: var(--text-primary);
    line-height: 1.4;
}

/* ---- Form Content ---- */
.form-content {
    padding: 15px;
    background: var(--bg-primary);
}

/* ---- Consent Section ---- */
.consent-section {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 20px 15px;
    margin-bottom: 20px;
    position: relative;
    overflow: hidden;
}


.consent-section h3 {
    color: var(--text-primary);
    margin-bottom: 15px;
    font-size: 1.1em;
}

.consent-text {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
}

/* ---- Checkbox Container (Consent) ---- */
.checkbox-container {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 15px;
    cursor: pointer;
    padding: 15px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    background: var(--bg-secondary);
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
    position: relative;
}

.checkbox-container:hover {
    border-color: var(--color-primary);
    background-color: rgba(16, 185, 129, 0.05);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.checkbox-container input[type="checkbox"] {
    display: none;
}

.checkbox-container::before {
    content: "";
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-primary);
    transition: all 0.3s ease;
    flex-shrink: 0;
    margin-top: 2px;
}

.checkbox-container span {
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.95em;
    line-height: 1.4;
    cursor: pointer;
    flex: 1;
}

.checkbox-container:has(input[type="checkbox"]:checked) {
    border-color: var(--color-primary);
    background: rgba(16, 185, 129, 0.1);
}

.checkbox-container:has(input[type="checkbox"]:checked)::before {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.checkbox-container:has(input[type="checkbox"]:checked)::after {
    content: "✓";
    position: absolute;
    left: 19px;
    top: 19px;
    color: var(--bg-primary);
    font-weight: bold;
    font-size: 14px;
}

.checkbox-container:active {
    transform: translateY(0);
}

.checkbox-container:focus-within {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ---- Form Section ---- */
.form-section {
    margin-bottom: 25px;
    padding: 20px 15px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: var(--bg-secondary);
}

.form-section h3 {
    color: var(--text-primary);
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-primary);
    font-size: 1.1em;
}

/* ---- Form Row + Group ---- */
.form-row {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 20px;
}

.form-row:last-child {
    margin-bottom: 0;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-size: 0.95em;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="date"],
.form-group input[type="time"],
.form-group input[type="number"],
.form-group select,
.form-group textarea {
    padding: 15px 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 52px;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    color-scheme: light dark;
    width: 100%;
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
    font-family: inherit;
}

.form-group select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%23666666' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 40px;
    cursor: pointer;
}

@media (prefers-color-scheme: dark) {
    .form-group select {
        background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%2394a3b8' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
    }
}

.form-group select option {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus,
.form-group input[type="date"]:focus,
.form-group input[type="time"]:focus,
.form-group input[type="number"]:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}

.form-group input[type="number"][readonly]:focus {
    border-color: var(--border-color);
    box-shadow: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-tertiary);
}

/* ---- Optional & Required Hints ---- */
.optional-hint {
    color: var(--text-tertiary);
    font-size: 0.8em;
    font-weight: 400;
}

.required-hint {
    color: var(--color-error);
    font-size: 0.85em;
    margin-bottom: 20px;
    display: block;
}

.required {
    color: var(--color-error);
    margin-left: 3px;
}

/* ---- File Upload ---- */
.file-upload-area {
    display: block;
    border: 2px dashed var(--border-color);
    border-radius: 10px;
    padding: 28px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--bg-primary);
    position: relative;
}

.file-upload-area:hover,
.file-upload-area.drag-over {
    border-color: var(--color-primary);
    background: rgba(16, 185, 129, 0.05);
}

.file-upload-area input[type="file"] {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    overflow: hidden;
    z-index: -1;
}

.file-upload-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    pointer-events: none;
}

.file-upload-icon {
    font-size: 2em;
    margin-bottom: 4px;
}

.file-upload-text {
    color: var(--text-primary);
    font-size: 0.95em;
    font-weight: 500;
}

.file-upload-hint {
    color: var(--text-tertiary);
    font-size: 0.82em;
}

/* Foto-Zähler */
.photo-counter {
    color: var(--color-primary);
    font-size: 0.85em;
    font-weight: 600;
    margin-top: 10px;
    min-height: 20px;
}

/* Foto-Vorschau Grid */
.photo-preview {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-top: 14px;
}

.photo-item {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    aspect-ratio: 1;
}

.photo-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.photo-remove {
    position: absolute;
    top: 4px;
    right: 4px;
    background: rgba(239, 68, 68, 0.9);
    color: #fff;
    border: none;
    border-radius: 50%;
    width: 22px;
    height: 22px;
    font-size: 12px;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    transition: background 0.2s ease;
}

.photo-remove:hover {
    background: var(--color-error);
}

.photo-name {
    display: block;
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.6);
    color: var(--text-secondary);
    font-size: 0.7em;
    padding: 3px 5px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ---- Submit Button ---- */
.submit-btn {
    background: linear-gradient(45deg, var(--color-primary), var(--color-info));
    color: var(--bg-primary);
    padding: 18px 25px;
    border: none;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: var(--shadow-md);
    width: 100%;
    min-height: 56px;
    margin-top: 20px;
}

.submit-btn:hover,
.submit-btn:active {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.submit-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ---- Loading Spinner ---- */
.loading {
    display: none;
    text-align: center;
    padding: 30px 20px;
    background: var(--bg-secondary);
    border-radius: 12px;
    margin-top: 20px;
    color: var(--text-secondary);
}

.spinner {
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--color-primary);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0%   { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ---- Success / Error Messages ---- */
.success-message {
    font-size: 1em;
    display: none;
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-primary);
    padding: 25px 20px;
    border-radius: 12px;
    border: 1px solid rgba(16, 185, 129, 0.3);
    text-align: center;
    margin-top: 20px;
}

.success-message h3 {
    font-size: 1.3em;
    line-height: 1.4;
    margin-bottom: 10px;
    font-weight: 600;
}

.success-message p {
    font-size: 1em;
    line-height: 1.4;
    margin: 0;
}

.error-message {
    font-size: 1em;
    display: none;
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-error);
    padding: 25px 20px;
    border-radius: 12px;
    border: 1px solid rgba(239, 68, 68, 0.3);
    text-align: center;
    margin-top: 20px;
}

.error-message h3 {
    font-size: 1.3em;
    line-height: 1.4;
    margin-bottom: 10px;
    font-weight: 600;
}

.error-message p {
    font-size: 1em;
    line-height: 1.4;
    margin: 0;
}

/* ---- Signature Box ---- */
.signature-box {
    width: 100%;
    height: 90px;
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    background: var(--bg-primary);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: border-color 0.2s ease, background 0.2s ease;
    touch-action: none;
}

.signature-box:not(.is-signed):hover {
    border-color: var(--color-primary);
    background: rgba(16, 185, 129, 0.04);
}

.signature-box:not(.is-signed)::before {
    content: "✍ Tippen zum Unterschreiben";
    color: var(--text-tertiary);
    font-size: 0.88em;
    pointer-events: none;
}

.signature-box.is-signed {
    background: var(--bg-primary);
    border-style: solid;
    border-color: var(--color-primary);
}

.signature-box.is-signed::before { display: none; }

.signature-box.is-signed::after {
    content: "✓";
    position: absolute;
    top: 4px;
    right: 8px;
    color: var(--color-primary);
    font-size: 0.8em;
    font-weight: bold;
    background: rgba(16, 185, 129, 0.12);
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.signature-box img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* ---- Signature Pad Modal ---- */
.sig-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    z-index: 3000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.sig-modal-overlay.hidden { display: none !important; }

.sig-modal-box {
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.7);
    width: 100%;
    max-width: 540px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sig-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1rem;
    letter-spacing: 0.03em;
    border-bottom: 2px solid var(--color-primary);
}

.sig-modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
    padding: 0 4px;
    transition: color 0.2s;
}

.sig-modal-close:hover { color: var(--color-error); }

.sig-canvas-wrapper {
    position: relative;
    background: #ffffff;
    margin: 16px;
    border-radius: 6px;
    border: 2px dashed var(--text-secondary);
    cursor: crosshair;
    touch-action: none;
    overflow: hidden;
}

#sigCanvas {
    display: block;
    width: 100%;
    height: 220px;
    border-radius: 4px;
}

.sig-canvas-hint {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--text-secondary);
    font-size: 1rem;
    pointer-events: none;
    white-space: nowrap;
}

.sig-canvas-hint.hidden { display: none; }

.sig-modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 12px 16px;
    border-top: 1px solid var(--border-color);
}

.sig-clear-btn {
    padding: 9px 20px;
    background: transparent;
    border: 1px solid var(--color-error);
    color: var(--color-error);
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9em;
    font-weight: 600;
    transition: all 0.2s;
}

.sig-clear-btn:hover {
    background: rgba(239, 68, 68, 0.1);
}

.sig-confirm-btn {
    padding: 9px 24px;
    background: linear-gradient(45deg, var(--color-primary), var(--color-info));
    border: none;
    color: var(--bg-primary);
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9em;
    font-weight: 700;
    letter-spacing: 0.03em;
    transition: opacity 0.2s;
}

.sig-confirm-btn:hover { opacity: 0.88; }

/* ---- Responsive: Desktop ---- */
@media (min-width: 769px) {
    .form-content {
        padding: 30px;
        max-width: 800px;
        margin: 0 auto;
    }

    .form-row {
        flex-direction: row;
        gap: 30px;
    }

    .form-group {
        flex: 1;
    }

    .submit-btn {
        width: auto;
        min-width: 300px;
        margin: 20px auto;
        display: block;
    }

    .photo-preview {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ---- Responsive: Large screens ---- */
@media (min-width: 1024px) {
    .header {
        padding: 40px 30px;
    }

    .header h1 {
        font-size: 2.5em;
    }

    .form-content {
        padding: 40px;
    }

    .form-section {
        padding: 30px;
    }
}

/* ---- Responsive: Very small screens ---- */
@media (max-width: 480px) {
    .header {
        padding: 20px 10px;
    }

    .header h1 {
        font-size: 1.5em;
    }

    .sig-canvas-hint {
        font-size: 0.85rem;
    }
}

/* ---- RTL Support ---- */
body.rtl .lang-change-bar {
    flex-direction: row-reverse;
}

body.rtl .form-group label {
    text-align: right;
}

body.rtl .sig-modal-footer {
    flex-direction: row-reverse;
}