/* ===================================
   GLOBALE VARIABLEN & IMPORTS
   =================================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    /* Farben - Light Mode */
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --primary-light: #dbeafe;
    --secondary-color: #8b5cf6;
    --success-color: #10b981;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #06b6d4;

    /* Hintergrund & Text */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;

    /* Borders & Schatten */
    --border-color: #e2e8f0;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --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);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

/* Dark Mode Variablen */
body.dark-mode {
    --primary-color: #60a5fa;
    --primary-hover: #3b82f6;
    --primary-light: #1e3a8a;
    --secondary-color: #a78bfa;
    --success-color: #34d399;
    --error-color: #f87171;
    --warning-color: #fbbf24;
    --info-color: #22d3ee;

    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;

    --border-color: #334155;
    --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, 0.4);
}

/* ===================================
   RESET & BASE STYLES
   =================================== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    overflow-y: scroll;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    padding: var(--spacing-md);
    transition: background-color var(--transition-base), color var(--transition-base);
    min-height: 100vh;
    overflow-x: hidden;
    overflow-y: auto;
}

/* ===================================
   TYPOGRAPHY
   =================================== */
h1 {
    color: var(--primary-color);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

h1 i {
    font-size: 1.75rem;
}

h2 {
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 600;
    margin: var(--spacing-xl) 0 var(--spacing-md) 0;
}

h3 {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

/* ===================================
   NAVIGATION
   =================================== */
nav {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-md);
}

nav ul {
    list-style-type: none;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
}

nav ul li {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-base);
    overflow: hidden;
    min-height: 52px;
    display: flex;
    align-items: center;
}

nav ul li:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

nav a {
    color: white;
    text-decoration: none;
    display: block;
    align-items: center;
    justify-content: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    font-weight: 500;
    font-size: 0.95rem;
    width: 100%;
    height: 100%;
}

nav a i {
    font-size: 1.3rem;
    flex-shrink: 0;
    width: 22px;
    text-align: center;
}

/* ===================================
   CARDS & CONTAINERS
   =================================== */
.card {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-lg);
}

/* ===================================
   FORMS
   =================================== */
form {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-xl);
}

label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.875rem;
}

input,
select,
textarea {
    width: 100%;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-family: inherit;
    font-size: 1rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

input::placeholder,
textarea::placeholder {
    color: var(--text-muted);
}

select[multiple] {
    min-height: 120px;
    padding: var(--spacing-sm);
}

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

/* ===================================
   BUTTONS
   =================================== */
button,
.btn {
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius-sm);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

button:not(.btn-secondary):not(.btn-danger):not(.btn-success):not(.btn-warning) {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

button:active:not(:disabled) {
    transform: translateY(0);
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

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

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

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

.btn-small {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
}

/* ===================================
   TABLES
   =================================== */
table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-lg);
}

thead {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

th {
    padding: var(--spacing-md);
    text-align: left;
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

tbody tr {
    transition: background-color var(--transition-fast);
}

tbody tr:hover {
    background: var(--bg-tertiary);
}

tbody tr:last-child td {
    border-bottom: none;
}

/* Responsive Tables */
.table-container {
    overflow-x: auto;
    margin-bottom: var(--spacing-lg);
}

/* ===================================
   LINKS
   =================================== */
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

p a {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 500;
}

/* ===================================
   UTILITY CLASSES
   =================================== */
.hidden {
    display: none !important;
}

.info {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--border-radius-sm);
    border-left: 3px solid var(--info-color);
}

/* ===================================
   SORTABLE LISTS (Drag & Drop)
   =================================== */
#sortableExercises {
    list-style-type: none;
    padding: 0;
    margin-top: var(--spacing-md);
    min-height: 50px;
}

#sortableExercises li {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    cursor: grab;
    transition: all var(--transition-fast);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

#sortableExercises li:hover {
    background: var(--bg-primary);
    border-color: var(--primary-color);
}

#sortableExercises li.dragging {
    opacity: 0.5;
    cursor: grabbing;
}

/* Sortier-Buttons */
.exercise-name {
    flex: 1;
    font-weight: 500;
}

.sort-buttons {
    display: flex;
    gap: var(--spacing-xs);
    flex-shrink: 0;
}

.btn-sort {
    width: 32px;
    height: 32px;
    padding: 0;
    border: 2px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.btn-sort:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transform: scale(1.1);
}

.btn-sort:active {
    transform: scale(0.95);
}

.btn-sort i {
    font-size: 0.875rem;
}

@media (max-width: 768px) {
    .btn-sort {
        width: 38px;
        height: 38px;
    }

    .btn-sort i {
        font-size: 1rem;
    }
}

.swipeable {
    transition: transform var(--transition-base), opacity var(--transition-base);
    will-change: transform;
}

.swipe-delete {
    transform: translateX(-100%);
    opacity: 0;
}

/* ===================================
   TOAST NOTIFICATIONS
   =================================== */
#toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    min-width: 300px;
    opacity: 0;
    transform: translateX(400px);
    transition: all var(--transition-base);
    border-left: 4px solid var(--info-color);
}

.toast.show {
    opacity: 1;
    transform: translateX(0);
}

.toast-success {
    border-left-color: var(--success-color);
}

.toast-error {
    border-left-color: var(--error-color);
}

.toast-warning {
    border-left-color: var(--warning-color);
}

.toast-info {
    border-left-color: var(--info-color);
}

.toast i {
    font-size: 1.25rem;
}

.toast-success i {
    color: var(--success-color);
}

.toast-error i {
    color: var(--error-color);
}

.toast-warning i {
    color: var(--warning-color);
}

.toast-info i {
    color: var(--info-color);
}

/* ===================================
   MODAL DIALOGS
   =================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.modal-overlay.show {
    opacity: 1;
}

.modal-dialog {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-xl);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow: auto;
    transform: scale(0.9);
    transition: transform var(--transition-base);
}

.modal-overlay.show .modal-dialog {
    transform: scale(1);
}

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.modal-header i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.modal-header h3 {
    margin: 0;
}

.modal-body {
    padding: var(--spacing-lg);
}

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 2px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
}

/* ===================================
   DARK MODE TOGGLE
   =================================== */
#dark-mode-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    z-index: 1000;
    transition: all var(--transition-base);
}

#dark-mode-toggle:hover {
    transform: scale(1.1) rotate(10deg);
    box-shadow: var(--shadow-xl);
}

/* ===================================
   SEARCH & FILTER
   =================================== */
.search-container {
    margin-bottom: var(--spacing-lg);
}

.search-input {
    position: relative;
}

.search-input i {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-input input {
    padding-left: 2.5rem;
}

.filter-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

/* ===================================
   SET CHECKBOXES (Training Progress)
   =================================== */
.sets-checkboxes {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
    justify-content: center;
}

.set-checkbox-label {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    padding: var(--spacing-xs);
    cursor: pointer;
    user-select: none;
    position: relative;
}

.set-checkbox-label input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
    margin: 0;
}

.set-checkbox-label span {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.set-checkbox-label:hover span {
    border-color: var(--primary-color);
    background: var(--primary-light);
    transform: scale(1.1);
}

.set-checkbox-label input[type="checkbox"]:checked+span {
    background: linear-gradient(135deg, var(--success-color), var(--info-color));
    border-color: var(--success-color);
    color: white;
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.set-checkbox-label input[type="checkbox"]:checked+span::after {
    content: '✓';
    font-size: 1.1rem;
    font-weight: 700;
}

/* Mobile: Größere Touch-Targets */
@media (max-width: 768px) {
    .set-checkbox-label span {
        width: 40px;
        height: 40px;
    }

    .sets-checkboxes {
        justify-content: flex-start;
    }
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */
@media (max-width: 768px) {
    body {
        padding: var(--spacing-sm);
    }

    h1 {
        font-size: 1.5rem;
    }

    nav ul {
        grid-template-columns: repeat(2, 1fr);
    }

    nav ul li {
        min-height: 50px;
    }

    nav a {
        font-size: 0.9rem;
        padding: var(--spacing-sm);
        gap: var(--spacing-xs);
    }

    nav a i {
        font-size: 1.2rem;
    }

    /* Mobile Card Layout für Tabellen */
    .table-container {
        overflow-x: visible;
    }

    table {
        font-size: 0.875rem;
    }

    /* Verstecke Tabellen-Header auf Mobile */
    table thead {
        display: none;
    }

    /* Zeige Tabellen-Zeilen als Cards */
    table tbody tr {
        display: block;
        margin-bottom: var(--spacing-md);
        border: 2px solid var(--border-color);
        border-radius: var(--border-radius-sm);
        padding: var(--spacing-md);
        background: var(--bg-secondary);
        box-shadow: var(--shadow-sm);
    }

    table tbody tr:hover {
        background: var(--bg-secondary);
        box-shadow: var(--shadow-md);
    }

    /* Zeige Tabellen-Zellen als Zeilen mit Labels */
    table tbody td {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: var(--spacing-sm) 0;
        border: none;
        border-bottom: 1px solid var(--border-color);
    }

    table tbody td:last-child {
        border-bottom: none;
        padding-top: var(--spacing-md);
        justify-content: center;
        gap: var(--spacing-sm);
    }

    /* Füge Labels vor dem Inhalt hinzu */
    table tbody td::before {
        content: attr(data-label);
        font-weight: 600;
        color: var(--text-secondary);
        flex: 0 0 40%;
    }

    /* Aktionen-Spalte ohne Label */
    table tbody td:last-child::before {
        content: none;
    }

    /* Buttons in Aktionen-Spalte nebeneinander */
    table tbody td:last-child {
        flex-direction: row;
    }

    #toast-container {
        left: 10px;
        right: 10px;
    }

    .toast {
        min-width: auto;
        width: 100%;
    }

    #dark-mode-toggle {
        bottom: 10px;
        right: 10px;
    }

    .modal-dialog {
        width: 95%;
    }

    .filter-group {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.25rem;
        flex-direction: column;
        text-align: center;
    }

    button,
    .btn {
        width: 100%;
        justify-content: center;
    }

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

    .modal-footer button {
        width: 100%;
    }

    /* Noch kompaktere Cards auf sehr kleinen Screens */
    table tbody td::before {
        flex: 0 0 50%;
        font-size: 0.875rem;
    }

    table tbody td {
        font-size: 0.875rem;
    }
}

/* ===================================
   ANIMATIONS
   =================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

@keyframes slideIn {
    from {
        transform: translateX(-100%);
    }

    to {
        transform: translateX(0);
    }
}

.fade-in {
    animation: fadeIn var(--transition-base);
}

.slide-in {
    animation: slideIn var(--transition-base);
}