:root {
    /* Marca / gradiente */
    --color-primary: #dddddd;
    --color-primary-dark: #920505;
    --color-primary-rgb: 102, 126, 234;

    /* Neutros */
    --color-white: #ffffff;
    --color-text-heading: #1a1a2e;
    --color-text-muted: #6b7280;
    --color-text-label: #374151;
    --color-border: #e5e7eb;
    --color-surface-muted: #f9fafb;

    /* Sombras */
    --color-shadow: rgba(0, 0, 0, 0.25);
    --color-primary-glow: rgba(var(--color-primary-rgb), 0.1);
    --color-primary-shadow: rgba(var(--color-primary-rgb), 0.3);

    /* Navbar (sobre o gradiente) */
    --navbar-bg: rgba(255, 255, 255, 0.1);
    --navbar-link: rgba(255, 255, 255, 0.9);
    --navbar-hover-bg: rgba(255, 255, 255, 0.2);

    /* Alertas */
    --color-danger: #dc2626;
    --alert-danger-bg: #fef2f2;
    --alert-danger-border: #fecaca;

    --color-success: #16a34a;
    --alert-success-bg: #f0fdf4;
    --alert-success-border: #bbf7d0;

    /* Badges */
    --badge-admin-bg: #fef3c7;
    --badge-admin-text: #d97706;
    --badge-user-bg: #dbeafe;
    --badge-user-text: #2563eb;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.navbar {
    background: var(--navbar-bg);
    backdrop-filter: blur(10px);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    color: var(--color-white);
    font-size: 1.5rem;
    font-weight: bold;
    text-decoration: none;
}

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

.navbar-nav a {
    color: var(--navbar-link);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    transition: background 0.2s;
}

.navbar-nav a:hover {
    background: var(--navbar-hover-bg);
}

.container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.card {
    background: var(--color-white);
    border-radius: 1rem;
    box-shadow: 0 25px 50px -12px var(--color-shadow);
    padding: 2.5rem;
    width: 100%;
    max-width: 420px;
}

.card-header {
    text-align: center;
    margin-bottom: 2rem;
}

.card-header .logo {
    display: block;
    max-width: 200px;
    height: auto;
    margin: 0 auto 1rem;
}

.card-header h1 {
    color: var(--color-text-heading);
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

.card-header p {
    color: var(--color-text-muted);
}

.form-group {
    margin-bottom: 1.5rem;
}

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

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--color-border);
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.btn {
    width: 100%;
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px var(--color-primary-shadow);
}

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

.alert {
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1.5rem;
}

.alert-danger {
    background: var(--alert-danger-bg);
    border: 1px solid var(--alert-danger-border);
    color: var(--color-danger);
}

.alert-success {
    background: var(--alert-success-bg);
    border: 1px solid var(--alert-success-border);
    color: var(--color-success);
}

.content-card {
    background: var(--color-white);
    border-radius: 1rem;
    box-shadow: 0 25px 50px -12px var(--color-shadow);
    padding: 2rem;
    max-width: 800px;
    width: 100%;
}

.welcome-header {
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
}

.welcome-header h1 {
    color: var(--color-text-heading);
    font-size: 1.5rem;
}

.user-info {
    background: var(--color-surface-muted);
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-admin {
    background: var(--badge-admin-bg);
    color: var(--badge-admin-text);
}

.badge-user {
    background: var(--badge-user-bg);
    color: var(--badge-user-text);
}