/* ===========================
   Global Styles
   =========================== */

:root {
    --primary-color: #0d6efd;
    --primary-dark: #0b5ed7;
    --primary-light: #0dcaf0;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
    --light-bg: #f8f9fa;
    --dark-text: #212529;
    --border-color: #dee2e6;
}

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

html {
    font-size: 14px;
    position: relative;
    min-height: 100%;
}

@media (min-width: 768px) {
    html {
        font-size: 16px;
    }
}

body {
    margin: 0;
    margin-bottom: 60px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
    color: var(--dark-text);
}

/* ===========================
   Typography
   =========================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
}

a {
    transition: color 0.3s ease;
}

/* ===========================
   Forms
   =========================== */

.form-floating > .form-control-plaintext::placeholder,
.form-floating > .form-control::placeholder {
    color: var(--bs-secondary-color);
    text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder,
.form-floating > .form-control:focus::placeholder {
    text-align: start;
}

.btn:focus,
.btn:active:focus,
.btn-link.nav-link:focus,
.form-control:focus,
.form-check-input:focus {
    box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

/* ===========================
   Navigation
   =========================== */

.navbar {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    background: white !important;
}

.navbar-brand {
    font-weight: 700;
    color: var(--primary-color) !important;
    font-size: 1.3rem;
}

.nav-link {
    transition: color 0.3s ease;
}

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

/* ===========================
   Footer
   =========================== */

footer {
    position: absolute;
    bottom: 0;
    width: 100%;
    white-space: nowrap;
    line-height: 60px;
}

/* ===========================
   Cards
   =========================== */

.card {
    border: none;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    border-radius: 8px;
    transition: box-shadow 0.3s ease;
}

.card:hover {
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

/* ===========================
   Alerts
   =========================== */

.alert {
    border-radius: 8px;
    border: none;
}

.alert-info {
    background-color: #e7f3ff;
    color: #004085;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
}

.alert-warning {
    background-color: #fff3cd;
    color: #856404;
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
}

/* ===========================
   Buttons
   =========================== */

.btn {
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0.5rem 1.5rem rgba(13, 110, 253, 0.4);
    background: linear-gradient(135deg, var(--primary-dark) 0%, #0b5ed7 100%);
}

.btn-secondary {
    background-color: #6c757d;
    border: none;
}

.btn-secondary:hover {
    background-color: #5c636a;
}

/* ===========================
   Tables
   =========================== */

.table {
    border-radius: 8px;
    overflow: hidden;
}

.table thead {
    background-color: var(--light-bg);
}

/* ===========================
   Utilities
   =========================== */

.container {
    max-width: 1140px;
}

.text-muted {
    color: #6c757d !important;
}

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

/* Accessibility */
.btn:focus-visible,
.form-control:focus-visible,
.nav-link:focus-visible {
    outline: 2px solid transparent;
    outline-offset: 2px;
    box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.25);
}