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

:root {
    --primary: #0d6efd;
    --primary-hover: #0b5ed7;
    --primary-focus: #0a58ca;
    --success: #198754;
    --danger: #dc3545;
    --warning: #ffc107;
    --info: #0dcaf0;
    --light: #f8f9fa;
    --dark: #212529;
    --gray: #6c757d;
    --border: #ced4da;
    --shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    --border-radius: 0.25rem;
    --transition: all 0.15s ease-in-out;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.5;
    background-color: var(--light);
    color: var(--dark);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -15px;
}

.col {
    flex: 1;
    padding: 0 15px;
}

.col-12 {
    flex: 0 0 100%;
}

.col-6 {
    flex: 0 0 50%;
}

.col-4 {
    flex: 0 0 33.333333%;
}

.col-3 {
    flex: 0 0 25%;
}

.d-none {
    display: none !important;
}

.d-block {
    display: block !important;
}

.d-flex {
    display: flex !important;
}

.justify-content-between {
    justify-content: space-between !important;
}

.align-items-center {
    align-items: center !important;
}

.text-center {
    text-align: center !important;
}

.text-end {
    text-align: right !important;
}

.mb-0 {
    margin-bottom: 0 !important;
}

.mb-1 {
    margin-bottom: 0.25rem !important;
}

.mb-2 {
    margin-bottom: 0.5rem !important;
}

.mb-3 {
    margin-bottom: 1rem !important;
}

.mb-4 {
    margin-bottom: 1.5rem !important;
}

.mt-3 {
    margin-top: 1rem !important;
}

.mt-4 {
    margin-top: 1.5rem !important;
}

.w-100 {
    width: 100% !important;
}

.text-muted {
    color: var(--gray) !important;
}

.text-primary {
    color: var(--primary) !important;
}

.text-success {
    color: var(--success) !important;
}

.text-danger {
    color: var(--danger) !important;
}

.text-warning {
    color: var(--warning) !important;
}

.text-info {
    color: var(--info) !important;
}

.navbar {
    background-color: #fff;
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, .1);
}

.navbar-brand {
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--primary);
    text-decoration: none;
}

.navbar-nav {
    display: flex;
    list-style: none;
    gap: 1rem;
    align-items: center;
}

.nav-link {
    color: var(--gray);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
    background-color: rgba(13, 110, 253, 0.1);
}

.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
}

.login-card {
    background: white;
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 2rem;
    width: 100%;
    max-width: 400px;
}

.main-content {
    padding: 2rem 0;
    min-height: calc(100vh - 80px);
}

.routine-item {
    border-left: 4px solid var(--primary);
    background: #fff;
    margin-bottom: 1rem;
    transition: var(--transition);
}

.routine-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.profile-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    font-weight: bold;
    margin: 0 auto 1rem;
}

@media (max-width: 768px) {

    .col-6,
    .col-4,
    .col-3 {
        flex: 0 0 100%;
    }

    .navbar-nav {
        flex-direction: column;
        gap: 0.5rem;
    }

    .container {
        padding: 0 10px;
    }
}

.cards-container {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    max-width: 1200px;
    margin: 0 auto;
}

.card-item {
    flex: 0 0 calc(33.333% - 1rem);
    min-width: 280px;
    max-width: 350px;
}

.card {
    height: 100%;
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.card-body {
    padding: 2rem;
}

.hover-card {
    transition: all 0.3s ease;
}

.hover-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12) !important;
}

.btn-primary {
    border-radius: 6px;
    padding: 8px 20px;
}

@media (max-width: 768px) {
    .card-item {
        flex: 0 0 100%;
    }
}