/* Task Manager - Main Stylesheet */

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

:root {
    --primary-color: #EF5350;
    --secondary-color: #9E9E9E;
    --accent-color: #E57373;
    --bg-color: #f5f5f5;
    --card-bg: #ffffff;
    --text-primary: #333;
    --text-secondary: #666;
    --text-muted: #999;
    --border-color: #e0e0e0;
    --success-color: #4CAF50;
    --warning-color: #FF9800;
    --danger-color: #F44336;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */
.main-header {
    background: var(--card-bg);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-brand {
    text-align: center;
    padding: 15px 0 10px 0;
    border-bottom: 1px solid var(--border-color);
}

.nav-brand h1 {
    font-size: 24px;
    color: var(--primary-color);
    margin: 0;
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: color 0.2s;
}

.nav-link:hover {
    color: var(--primary-color);
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-dropdown {
    position: relative;
}

.user-dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

.user-dropdown-toggle:hover {
    background: var(--bg-color);
    border-color: var(--primary-color);
}

.username {
    color: var(--text-secondary);
    font-size: 14px;
}

.dropdown-arrow {
    color: var(--text-muted);
    font-size: 10px;
    transition: transform 0.2s;
}

.user-dropdown.active .dropdown-arrow {
    transform: rotate(180deg);
}

.user-dropdown-menu {
    position: absolute;
    top: calc(100% + 5px);
    right: 0;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s;
    z-index: 1001;
}

.user-dropdown.active .user-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: block;
    padding: 12px 16px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 14px;
    transition: background 0.2s;
    border-bottom: 1px solid var(--border-color);
}

.dropdown-item:last-child {
    border-bottom: none;
}

.dropdown-item:hover {
    background: var(--bg-color);
}

.dropdown-item.logout {
    color: var(--danger-color);
}

.dropdown-item.logout:hover {
    background: #FFEBEE;
}

.btn-logout {
    padding: 8px 16px;
    background: var(--danger-color);
    color: white;
    text-decoration: none;
    border-radius: 4px;
    font-size: 14px;
    transition: background 0.2s;
}

.btn-logout:hover {
    background: #d32f2f;
}

/* ============================================
   MAIN CONTENT
   ============================================ */
.main-content {
    flex: 1;
    padding: 30px 0;
}

/* ============================================
   FOOTER
   ============================================ */
.main-footer {
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
    padding: 20px 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 14px;
}

/* ============================================
   LOGIN PAGE
   ============================================ */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.login-card h1 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.login-card h2 {
    text-align: center;
    color: var(--text-secondary);
    font-size: 20px;
    margin-bottom: 30px;
}

.login-help {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.login-help code {
    background: #f5f5f5;
    padding: 2px 6px;
    border-radius: 3px;
    font-family: monospace;
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 14px;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="date"],
.form-group input[type="datetime-local"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: inherit;
    font-size: 14px;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

textarea {
    resize: vertical;
    min-height: 80px;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-block;
}

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

.btn-primary:hover {
    background: #d32f2f;
}

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

.btn-secondary:hover {
    background: #757575;
}

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

.btn-success:hover {
    background: #388E3C;
}

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

.btn-danger:hover {
    background: #d32f2f;
}

.btn-block {
    width: 100%;
    display: block;
}

/* ============================================
   ALERTS
   ============================================ */
.alert {
    padding: 12px 16px;
    border-radius: 4px;
    margin-bottom: 20px;
    font-size: 14px;
}

.alert-success {
    background: #E8F5E9;
    color: #2E7D32;
    border: 1px solid #A5D6A7;
}

.alert-error {
    background: #FFEBEE;
    color: #C62828;
    border: 1px solid #EF9A9A;
}

.alert-warning {
    background: #FFF3E0;
    color: #E65100;
    border: 1px solid #FFCC80;
}

.alert-info {
    background: #E3F2FD;
    color: #1565C0;
    border: 1px solid #90CAF9;
}

/* ============================================
   MODALS
   ============================================ */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    overflow-y: auto;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-content {
    background-color: white;
    padding: 30px;
    border-radius: 8px;
    width: 90%;
    max-width: 700px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    position: relative;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
}

.modal-header h2 {
    margin: 0;
    color: var(--text-primary);
}

.close-modal {
    background: none;
    border: none;
    font-size: 28px;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s;
}

.close-modal:hover {
    color: var(--text-primary);
}

.modal-buttons {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-top: 20px;
}

.btn-cancel {
    background: #6c757d;
    color: white;
}

.btn-cancel:hover {
    background: #5a6268;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 15px;
    }

    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }

    .nav-user {
        flex-direction: column;
        gap: 10px;
    }

    .modal-content {
        max-width: 95%;
        padding: 20px;
    }

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

    .modal-buttons .btn {
        width: 100%;
    }
}