/* ==========================================================================
   1. Design Tokens & CSS Variables
   ========================================================================== */
:root {
    /* Color Palette - Light Theme */
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --primary-light: #eff6ff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --bg-input: #ffffff;
    --border-color: #e2e8f0;
    --border-focus: #93c5fd;
    
    /* Functional Colors */
    --success-color: #10b981;
    --success-light: #ecfdf5;
    --warning-color: #f59e0b;
    --warning-light: #fffbeb;
    --danger-color: #ef4444;
    --danger-light: #fef2f2;
    --info-color: #06b6d4;
    
    /* Layout & Geometry */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Theme Overrides */
[data-theme="dark"] {
    --primary-color: #60a5fa;
    --primary-hover: #3b82f6;
    --primary-light: rgba(59, 130, 246, 0.15);
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --bg-main: #0f172a;
    --bg-card: #1e293b;
    --bg-input: #334155;
    --border-color: #334155;
    --border-focus: #60a5fa;
    --success-light: rgba(16, 185, 129, 0.15);
    --warning-light: rgba(245, 158, 11, 0.15);
    --danger-light: rgba(239, 68, 68, 0.15);
}

/* ==========================================================================
   2. Reset & General Setup
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    max-width: 100vw;
    overflow-x: hidden;
    margin: 0;
    padding: 0;
    width: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ==========================================================================
   3. Layout Components
   ========================================================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    box-sizing: border-box;
}

/* Header & Navbar */
.app-header {
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 40;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary-color);
    text-decoration: none;
}

/* Grid & Dashboard System */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.25rem;
    margin-top: 1.5rem;
}

/* ==========================================================================
   4. UI Components (Cards, Forms, Buttons)
   ========================================================================== */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

/* Form Styling */
.form-group {
    margin-bottom: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

input, select, textarea {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-input);
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

input:focus, select:focus, textarea:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
    text-decoration: none;
    font-size: 0.95rem;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #ffffff;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
}

.btn-secondary {
    background-color: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-danger {
    background-color: var(--danger-color);
    color: #ffffff;
}

/* Status Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.625rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success { background-color: var(--success-light); color: var(--success-color); }
.badge-warning { background-color: var(--warning-light); color: var(--warning-color); }
.badge-danger  { background-color: var(--danger-light);  color: var(--danger-color); }

/* Table Component */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th, td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--bg-main);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.85rem;
}

/* ==========================================================================
   5. Mobile-Optimierung (Responsive Design für Smartphones)
   ========================================================================== */
.container, main, header {
    width: 100%;
    max-width: 100%;
    padding-left: 12px;
    padding-right: 12px;
    box-sizing: border-box;
}

@media (max-width: 768px) {
    .grid, .row, .dashboard-grid, .form-row {
        display: flex;
        flex-direction: column;
        width: 100%;
        gap: 10px;
    }

    input[type="text"],
    input[type="email"],
    input[type="password"],
    input[type="number"],
    input[type="date"],
    select,
    textarea,
    .btn {
        width: 100% !important;
        box-sizing: border-box;
        font-size: 16px; /* Verhindert Safari Auto-Zoom */
    }

    .card, .food-item, .device-card {
        width: 100%;
        margin-left: 0;
        margin-right: 0;
        box-sizing: border-box;
    }

    nav, header, .nav-container {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
        gap: 8px;
    }
}

/* ==========================================================================
   6. Floating Plus-Button & Perfektes Handy-Modal (Popup-Menü)
   ========================================================================== */

/* Schwebender Plus-Button unten rechts */
.fab-button, 
#add-food-btn,
.btn-floating {
    position: fixed !important;
    bottom: 24px !important;
    right: 24px !important;
    width: 60px !important;
    height: 60px !important;
    border-radius: 50% !important;
    background-color: var(--primary-color, #3b82f6) !important;
    color: #ffffff !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    font-size: 34px !important;
    font-weight: 300 !important;
    line-height: 1 !important;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.3) !important;
    z-index: 9998 !important;
    border: none !important;
    cursor: pointer !important;
    transition: transform 0.2s ease, background-color 0.2s ease !important;
    -webkit-tap-highlight-color: transparent;
}

.fab-button:active, 
#add-food-btn:active {
    transform: scale(0.9) !important;
}

.fab-button:hover,
#add-food-btn:hover {
    background-color: var(--primary-hover, #2563eb) !important;
}

/* Abdunkelnder Hintergrund für das Popup (Modal Overlay) */
.modal, 
.modal-backdrop,
#food-modal,
#modal {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    background-color: rgba(0, 0, 0, 0.5) !important;
    backdrop-filter: blur(3px);
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    z-index: 9999 !important;
    padding: 16px !important;
    box-sizing: border-box !important;
}

/* Versteckte Modals */
.modal.hidden,
#food-modal.hidden,
.hidden {
    display: none !important;
}

/* Das eigentliche Eingabefenster / Menü */
.modal-content, 
.modal-dialog,
.modal-body {
    background-color: var(--bg-card, #ffffff) !important;
    color: var(--text-primary, #1e293b) !important;
    width: 100% !important;
    max-width: 480px !important;
    border-radius: 16px !important;
    padding: 20px !important;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.2) !important;
    max-height: 90vh !important;
    overflow-y: auto !important;
    box-sizing: border-box !important;
    margin: 0 auto !important;
}

/* Eingabefelder im Popup am Handy sauber untereinander */
.modal-content form,
.modal-content .form-group {
    display: flex !important;
    flex-direction: column !important;
    gap: 12px !important;
    width: 100% !important;
}

.modal-content input,
.modal-content select,
.modal-content textarea {
    width: 100% !important;
    font-size: 16px !important;
    padding: 12px !important;
    box-sizing: border-box !important;
}