/* Trainer 2000 - CSS Styles */
:root {
    --primary-blue: #1e3a8a;
    --secondary-blue: #3b82f6;
    --light-blue: #dbeafe;
    --dark-blue: #1e40af;
    --success-green: #10b981;
    --error-red: #ef4444;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --background: #f8fafc;
    --white: #ffffff;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--background);
    color: var(--text-dark);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Header */
header {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--white);
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

header h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

header p {
    opacity: 0.9;
    margin-bottom: 1rem;
}

nav {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 0.375rem;
    text-decoration: none;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.875rem;
}

.btn-primary {
    background-color: #f59e0b;
    color: var(--white);
    border: 2px solid #f59e0b;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.btn-primary:hover {
    background-color: #d97706;
    border-color: #d97706;
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.btn-secondary {
    background-color: rgba(255,255,255,0.2);
    color: var(--white);
    border: 2px solid rgba(255,255,255,0.3);
}

.btn-secondary:hover {
    background-color: rgba(255,255,255,0.3);
    border-color: rgba(255,255,255,0.5);
}

.btn-admin {
    background-color: var(--error-red);
    color: var(--white);
    border: 2px solid var(--error-red);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.btn-admin:hover {
    background-color: #dc2626;
    border-color: #dc2626;
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* Main Content */
main {
    padding: 2rem 0;
}

.week-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding: 1rem;
    background: var(--white);
    border-radius: 0.5rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.week-navigation h2 {
    color: var(--primary-blue);
    font-size: 1.25rem;
}

/* Group Sections */
.group-section {
    margin-bottom: 2rem;
    background: var(--white);
    border-radius: 0.5rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    overflow: hidden;
}

.group-section h3 {
    background: var(--primary-blue);
    color: var(--white);
    padding: 1rem;
    margin: 0;
    font-size: 1.125rem;
}

/* Availability Table */
.availability-table {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 0.75rem;
    text-align: center;
    border-bottom: 1px solid #e5e7eb;
}

th {
    background-color: var(--light-blue);
    color: var(--primary-blue);
    font-weight: 600;
    font-size: 0.875rem;
}

.trainer-name {
    text-align: left;
    font-weight: 500;
    background-color: #f9fafb;
    min-width: 120px;
}

.availability-cell {
    position: relative;
    width: 80px;
    min-width: 80px;
}

/* Availability Icons */
.available {
    color: var(--success-green);
    font-size: 1.25rem;
    font-weight: bold;
}

.unavailable {
    color: var(--error-red);
    font-size: 1.25rem;
    font-weight: bold;
}

.no-training {
    color: var(--text-light);
    font-size: 1.25rem;
}

.unknown {
    color: var(--text-light);
    font-size: 1.25rem;
}

/* Availability Controls */
.availability-controls {
    display: none;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    gap: 0.25rem;
}

.availability-cell:hover .availability-controls {
    display: flex;
}

.btn-mini {
    padding: 0.25rem;
    border: none;
    border-radius: 0.25rem;
    cursor: pointer;
    font-size: 0.75rem;
    min-width: 24px;
    height: 24px;
}

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

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

/* Forms */
.form-container {
    max-width: 400px;
    margin: 2rem auto;
    padding: 2rem;
    background: var(--white);
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.form-group {
    margin-bottom: 1rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-dark);
}

input, select, textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #d1d5db;
    border-radius: 0.375rem;
    font-size: 1rem;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--secondary-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Form Buttons */
button[type="submit"], input[type="submit"] {
    background-color: #f59e0b;
    color: var(--white);
    border: 2px solid #f59e0b;
    padding: 0.75rem 1.5rem;
    border-radius: 0.375rem;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

button[type="submit"]:hover, input[type="submit"]:hover {
    background-color: #d97706;
    border-color: #d97706;
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
    transform: translateY(-1px);
}

/* Links */
a {
    color: var(--primary-blue);
    text-decoration: underline;
    transition: color 0.2s;
}

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

/* Special styling for navigation links that are styled as buttons */
nav a, .week-navigation a {
    text-decoration: none;
}

/* Admin Panel */
.admin-panel {
    display: grid;
    gap: 2rem;
    margin-top: 2rem;
}

.admin-section {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 0.5rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.admin-section h3 {
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 0.5rem;
    }
    
    header h1 {
        font-size: 1.5rem;
    }
    
    nav {
        flex-direction: column;
        gap: 0.5rem;
        align-items: stretch;
    }
    
    .week-navigation {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 0.5rem;
        text-align: center;
        justify-content: space-between;
        align-items: center;
    }
    
    .week-navigation .btn {
        width: auto;
        min-width: 80px;
        flex-shrink: 0;
    }
    
    .week-navigation h2 {
        flex: 1;
        margin: 0;
        font-size: 1rem;
        min-width: 0;
    }
    
    th, td {
        padding: 0.5rem 0.25rem;
        font-size: 0.875rem;
    }
    
    .trainer-name {
        min-width: 80px;
        font-size: 0.75rem;
    }
    
    .availability-cell {
        width: 60px;
        min-width: 60px;
    }
    
    .availability-controls {
        position: static;
        display: flex;
        transform: none;
        margin-top: 0.25rem;
        justify-content: center;
    }
    
    .availability-cell:hover .availability-controls {
        display: flex;
    }
}

@media (max-width: 480px) {
    .week-navigation {
        padding: 0.5rem;
        gap: 0.25rem;
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
    
    .week-navigation .btn {
        padding: 0.4rem 0.6rem;
        font-size: 0.7rem;
        min-width: 70px;
        white-space: nowrap;
        flex-shrink: 0;
    }
    
    .week-navigation h2 {
        font-size: 0.85rem;
        margin: 0;
        flex: 1;
        text-align: center;
        min-width: 0;
        padding: 0 0.25rem;
    }
    
    .availability-table {
        font-size: 0.75rem;
    }
    
    th, td {
        padding: 0.25rem;
    }
    
    .trainer-name {
        min-width: 60px;
    }
    
    .availability-cell {
        width: 45px;
        min-width: 45px;
    }
    
    .btn-mini {
        min-width: 20px;
        height: 20px;
        font-size: 0.625rem;
    }
}

/* Loading and Messages */
.message {
    padding: 1rem;
    border-radius: 0.375rem;
    margin-bottom: 1rem;
}

.message-success {
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.message-error {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.loading {
    text-align: center;
    padding: 2rem;
    color: var(--text-light);
}

/* No Training Message */
.no-training-message {
    background: var(--white);
    border-radius: 0.5rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    padding: 2rem;
    text-align: center;
    margin-bottom: 2rem;
}

.no-training-message p {
    color: var(--text-light);
    font-size: 1.125rem;
    margin: 0;
}