/* ============================================
   Uni-Planner - Main CSS
   Modernes, responsives Design-System
   ============================================ */

/* ============================================
   CSS Reset & Base
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Farben - Modernes Blau-Schema */
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary: #64748b;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #06b6d4;
    
    /* Noten-Farben */
    --note-gut: #10b981;
    --note-befriedigend: #f59e0b;
    --note-ausreichend: #f97316;
    --note-mangelhaft: #ef4444;
    
    /* Graustufen */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */
    --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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@media (prefers-color-scheme: dark) {
    :root {
        /* Dark Mode Graustufen */
        --gray-50: #18181b;
        --gray-100: #27272a;
        --gray-200: #3f3f46;
        --gray-300: #52525b;
        --gray-400: #71717a;
        --gray-500: #a1a1aa;
        --gray-600: #d4d4d8;
        --gray-700: #e4e4e7;
        --gray-800: #f4f4f5;
        --gray-900: #fafafa;
        
        /* Dark Mode Textfarben */
        --text-primary: #fafafa;
        --text-secondary: #d4d4d8;
        --text-muted: #a1a1aa;
        
        /* Dark Mode Hintergrundfarben */
        --bg-primary: #09090b;
        --bg-secondary: #18181b;
        --bg-tertiary: #27272a;
        
        /* Dark Mode Rahmen & Schatten */
        --border-color: #3f3f46;
        --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
        --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
        --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
        --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
        
        /* Angepasste Primary-Farben für besseren Kontrast */
        --primary: #3b82f6;
        --primary-light: #60a5fa;
        
        /* Angepasste Notenfarben für Dark Mode */
        --note-gut: #22c55e;
        --note-befriedigend: #fbbf24;
        --note-ausreichend: #fb923c;
        --note-mangelhaft: #f87171;
    }
}


body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-800);
    background: var(--gray-50);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}


/* ============================================
   Manueller Dark Mode (data-theme Attribut)
   ============================================ */
[data-theme="dark"] {
    /* Dark Mode Graustufen */
    --gray-50: #18181b;
    --gray-100: #27272a;
    --gray-200: #3f3f46;
    --gray-300: #52525b;
    --gray-400: #71717a; 
    --gray-500: #a1a1aa;
    --gray-600: #d4d4d8;
    --gray-700: #e4e4e7;
    --gray-800: #f4f4f5;
    --gray-900: #fafafa;
    
    /* Dark Mode Textfarben */
    --text-primary: #fafafa;
    --text-secondary: #d4d4d8;
    --text-muted: #a1a1aa;
    
    /* Dark Mode Hintergrundfarben */
    --bg-primary: #09090b;
    --bg-secondary: #1e1e1e;
    --bg-tertiary: #27272a;
    
    /* Dark Mode Rahmen & Schatten */
    --border-color: #3f3f46;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
    
    /* Angepasste Primary-Farben */
    --primary: #3b82f6;
    --primary-light: #60a5fa;
    
    /* Angepasste Notenfarben */
    --note-gut: #22c55e;
    --note-befriedigend: #fbbf24;
    --note-ausreichend: #fb923c;
    --note-mangelhaft: #f87171;
}

[data-theme="dark"] body {
    background: var(--bg-primary);
    color: var(--text-primary);
}

/* Dark Mode Toggle Button Styling */
#darkModeToggle {
    padding: var(--spacing-sm) var(--spacing-md);
    transition: var(--transition);
}

#darkModeToggle:hover {
    color: var(--primary-light);
    transform: scale(1.1);
}

@media (max-width: 767px) {
    #darkModeToggle {
        display: flex;
        width: 100%;
        justify-content: flex-start;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--border-color);
    }
}


/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--gray-900);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

@media (min-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.75rem; }
}

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

/* ============================================
   Container & Layout
   ============================================ */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
}

.container-sm {
    max-width: 600px;
}

.container-md {
    max-width: 900px;
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .grid {
        gap: var(--spacing-lg);
    }
}

.grid-2 { 
    grid-template-columns: 1fr;
}

.grid-3 { 
    grid-template-columns: 1fr;
}

.grid-4 { 
    grid-template-columns: 1fr;
}

@media (min-width: 640px) {
    .grid-2 { 
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 768px) {
    .grid-3 { 
        grid-template-columns: repeat(2, 1fr);
    }
    .grid-4 { 
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .grid-3 { 
        grid-template-columns: repeat(3, 1fr);
    }
    .grid-4 { 
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Flexbox Utilities */
.flex {
    display: flex;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.flex-column {
    flex-direction: column;
}

.flex-wrap {
    flex-wrap: wrap;
}

.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

/* ============================================
   Cards
   ============================================ */
.card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-lg);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
}

@media (min-width: 768px) {
    .card {
        padding: var(--spacing-xl);
    }
}

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

.card-header {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--gray-100);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0;
}

@media (min-width: 768px) {
    .card-title {
        font-size: 1.5rem;
    }
}

.card-body {
    margin-bottom: var(--spacing-lg);
}

.card-footer {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--gray-100);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.625rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

@media (min-width: 768px) {
    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-800);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--gray-300);
}

.btn-success {
    background: var(--success);
    color: white;
}

.btn-success:hover:not(:disabled) {
    background: #059669;
}

.btn-danger {
    background: var(--error);
    color: white;
}

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-outline:hover:not(:disabled) {
    background: var(--primary);
    color: white;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
}

@media (min-width: 768px) {
    .btn-sm {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
}

.btn-lg {
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
}

@media (min-width: 768px) {
    .btn-lg {
        padding: 1rem 2rem;
        font-size: 1.125rem;
    }
}

.btn-block {
    width: 100%;
}

/* Button Icon Only for Mobile */
.btn-icon-mobile i {
    margin: 0;
}

.btn-icon-mobile span {
    display: none;
}

@media (min-width: 768px) {
    .btn-icon-mobile span {
        display: inline;
    }
}

/* ============================================
   Forms
   ============================================ */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    color: #000000;
    font-size: 0.9375rem;
}

.form-label.required::after {
    content: " *";
    color: var(--error);
}

.form-control {
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: 0.9375rem;
    line-height: 1.5;
    color: var(--gray-900);
    background: white;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

@media (min-width: 768px) {
    .form-control {
        padding: 0.75rem 1rem;
        font-size: 1rem;
    }
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-control:disabled {
    background: var(--gray-100);
    cursor: not-allowed;
}

.form-control.error {
    border-color: var(--error);
}

.form-control.success {
    border-color: var(--success);
}

select.form-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3E%3Cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3E%3C/svg%3E");
    background-position: right 0.5rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

.form-text {
    display: block;
    margin-top: var(--spacing-sm);
    font-size: 0.8125rem;
    color: var(--gray-500);
}

.form-error {
    display: block;
    margin-top: var(--spacing-sm);
    font-size: 0.8125rem;
    color: var(--error);
}

.form-success {
    display: block;
    margin-top: var(--spacing-sm);
    font-size: 0.8125rem;
    color: var(--success);
}

/* Checkbox & Radio */
.form-check {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
    width: 1.25rem;
    height: 1.25rem;
    cursor: pointer;
}

/* ============================================
   Alerts & Messages
   ============================================ */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    border: 1px solid;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    font-size: 0.9375rem;
}

@media (min-width: 768px) {
    .alert {
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        font-size: 1rem;
    }
}

.alert-success {
    background: #d1fae5;
    border-color: var(--success);
    color: #065f46;
}

.alert-error {
    background: #fee2e2;
    border-color: var(--error);
    color: #991b1b;
}

.alert-warning {
    background: #fef3c7;
    border-color: var(--warning);
    color: #92400e;
}

.alert-info {
    background: #cffafe;
    border-color: var(--info);
    color: #155e75;
}

.alert-close {
    margin-left: auto;
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0.5;
    transition: var(--transition);
    flex-shrink: 0;
}

.alert-close:hover {
    opacity: 1;
}

/* ============================================
   Badges
   ============================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.625rem;
    font-size: 0.8125rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
}

@media (min-width: 768px) {
    .badge {
        padding: 0.25rem 0.75rem;
        font-size: 0.875rem;
    }
}

.badge-primary { background: var(--primary-light); color: white; }
.badge-success { background: var(--success); color: white; }
.badge-warning { background: var(--warning); color: white; }
.badge-error { background: var(--error); color: white; }
.badge-secondary { background: var(--gray-300); color: var(--gray-700); }

/* ============================================
   Loading Spinner
   ============================================ */
.spinner {
    border: 3px solid var(--gray-200);
    border-top: 3px solid var(--primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

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

.spinner-sm {
    width: 20px;
    height: 20px;
    border-width: 2px;
}

/* ============================================
   Utilities
   ============================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-error { color: var(--error); }
.text-muted { color: var(--gray-500); }

.bg-primary { background: var(--primary); }
.bg-gray-50 { background: var(--gray-50); }
.bg-white { background: white; }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }

.hidden { display: none; }
.visible { display: block; }

/* Responsive utilities */
.hide-mobile {
    display: none;
}

@media (min-width: 768px) {
    .hide-mobile {
        display: block;
    }
}

.show-mobile {
    display: block;
}

@media (min-width: 768px) {
    .show-mobile {
        display: none;
    }
}

@media (prefers-color-scheme: dark) {
    .card {
        background: var(--bg-secondary);
        border-color: var(--border-color);
        color: var(--text-primary);
        box-shadow: var(--shadow-sm);
    }

    body {
        background: var(--bg-primary);
        color: var(--text-primary);
    }
}