:root {
    --primary-blue: #004183;
    --secondary-blue: #4FC3F7;
    --dark-blue: #004183;
    --light-bg: #f8faff;
    --accent-color: #00E0C6; 
    --white: #ffffff;
    --border-color: #e9ecef;
    --text-primary: #2c3e50;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--light-bg);
    background-image: radial-gradient(circle at top right, rgba(79, 195, 247, 0.1), transparent 30%); 
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.signup-card {
    background: var(--white); 
    border-radius: 20px;
    padding: 3rem;
    box-shadow: 0 15px 35px rgba(0, 51, 102, 0.1); 
    width: 100%;
    max-width: 550px;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.signup-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 25px 50px rgba(0, 51, 102, 0.15);
}

.form-label {
    font-weight: 500;
    color: var(--dark-blue);
    margin-bottom: 0.5rem;
}

.form-control {
    border-radius: 15px;
    padding: 0.75rem 1.25rem;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
    font-size: 1rem;
}

/* Estilos da navbar */
nav.navbar {
    background-color: rgba(0, 65, 131, 0.95); /* Azul primário com transparência */
    backdrop-filter: blur(10px);
}

nav.navbar .navbar-brand,
nav.navbar .navbar-brand i.bi-cpu {
    color: var(--white);
    transition: color 0.3s ease;
    text-decoration: none;
}

nav.navbar .navbar-brand:hover,
nav.navbar .navbar-brand:hover i.bi-cpu {
    color: var(--accent-color);
}

.form-control:focus {
    border-color: var(--accent-color); 
    box-shadow: 0 0 0 4px rgba(0, 224, 198, 0.2); 
}

.input-group-text {
    border-radius: 15px 0 0 15px;
    border: 2px solid var(--border-color);
    border-right: none;
    background-color: white;
    color: var(--primary-blue);
    padding: 0.75rem 1.25rem;
}

.input-group .form-control {
    border-radius: 0 15px 15px 0;
}

.btn-primary {
    background-image: linear-gradient(45deg, var(--primary-blue), var(--secondary-blue)); 
    color: white !important;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease-in-out;
    border: none;
    box-shadow: 0 8px 15px rgba(0, 102, 204, 0.25); 
}
.btn-primary::before {
    display: none;
}

.btn-primary:hover {
    background-color: var(--dark-blue); 
    background-image: none;
    transform: translateY(-4px) scale(1.02); 
    box-shadow: 0 12px 25px rgba(0, 51, 102, 0.35);
}

.link-secondary {
    color: var(--dark-blue);
    text-decoration: none;
    transition: all 0.3s ease;
    font-weight: 500;
}

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

.back-link {
    display: inline-flex;
    align-items: center;
    font-weight: 500;
    transition: all 0.3s ease;
}

.back-link:hover {
    transform: translateX(-5px);
}

.alert {
    border-radius: 15px;
    border: none;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.logo-icon {
    font-size: 3rem;
    color: var(--primary-blue);
    margin-bottom: 1rem;
    display: inline-block;
    transition: all 0.3s ease;
}

.logo-icon:hover {
    transform: scale(1.1) rotate(15deg);
    color: var(--dark-blue);
}

.password-strength {
    height: 4px;
    margin-top: 0.5rem;
    border-radius: 2px;
    transition: all 0.3s ease;
}

.btn-disabled {
    background: #cccccc !important;
    background-image: none !important;
    cursor: not-allowed !important;
    opacity: 0.7;
    box-shadow: none !important;
    transform: none !important;
}

.btn-senha {
    border-radius: 0 15px 15px 0;
}

@media (max-width: 576px) {
    .signup-card {
        padding: 2rem;
    }
}

/* --- Dark Mode Styles --- */
body.dark-mode {
    --primary-blue: #00BFFF; /* Acento Ciano */
    --dark-blue: #101010;
    background: #101010; /* Fundo Principal */
}

body.dark-mode .signup-card {
    background: #181818; /* Card */
    border-color: #232323; /* Borda */
    box-shadow: 0 2px 8px rgba(0,0,0,0.75);
}

body.dark-mode .form-label {
    color: #F5F5F5; /* Texto Primário */
}

body.dark-mode .form-control {
    background-color: #101010;
    color: #F5F5F5;
    border-color: #232323;
}

body.dark-mode .form-control:focus {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 4px rgba(0, 191, 255, 0.2);
}

body.dark-mode .input-group-text {
    background-color: #101010;
    color: var(--primary-blue);
    border-color: #232323;
}

body.dark-mode .btn-primary {
    background: #FF4081; /* Botão Primário Rosa */
    color: #F5F5F5 !important;
}

body.dark-mode .btn-primary:hover {
    background: #00FF8B; /* Botão Secundário Verde no hover */
}

body.dark-mode .link-secondary {
    color: #F5F5F5;
}

body.dark-mode .link-secondary:hover {
    color: var(--primary-blue);
}

body.dark-mode .logo-icon {
    color: var(--primary-blue);
}

body.dark-mode .logo-icon:hover {
    color: #00FF8B;
}

body.dark-mode .alert-danger {
    background-color: rgba(255, 23, 68, 0.1);
    color: #FF1744;
}

body.dark-mode .alert-success {
    background-color: rgba(0, 255, 65, 0.1);
    color: #00FF41;
}

/* Estilos do tema claro para a navbar */
nav.navbar.navbar-light {
    background-color: rgba(255, 255, 255, 0.95) !important;
}

nav.navbar.navbar-light .navbar-brand,
nav.navbar.navbar-light .navbar-brand i.bi-cpu {
    color: var(--dark-blue) !important;
}

nav.navbar.navbar-light .nav-link {
    color: var(--text-primary) !important;
}

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

nav.navbar.navbar-light #theme-toggle {
    color: var(--text-primary);
}

/* Estilos do tema escuro para a navbar */
body.dark-mode nav.navbar.navbar-dark {
    background-color: rgba(30, 30, 30, 0.95) !important;
}

body.dark-mode nav.navbar .navbar-brand,
nav.navbar.navbar-dark .navbar-brand,
body.dark-mode nav.navbar .navbar-brand i.bi-cpu,
nav.navbar.navbar-dark .navbar-brand i.bi-cpu {
    color: var(--white) !important;
}

body.dark-mode nav.navbar .navbar-brand:hover,
nav.navbar.navbar-dark .navbar-brand:hover,
body.dark-mode nav.navbar .navbar-brand:hover i.bi-cpu,
nav.navbar.navbar-dark .navbar-brand:hover i.bi-cpu {
    color: var(--accent-color) !important;
}

body.dark-mode nav.navbar .nav-link,
nav.navbar.navbar-dark .nav-link {
    color: var(--white) !important;
}

body.dark-mode nav.navbar .nav-link:hover,
nav.navbar.navbar-dark .nav-link:hover {
    color: var(--accent-color) !important;
}

body.dark-mode nav.navbar #theme-toggle,
nav.navbar.navbar-dark #theme-toggle {
    color: var(--white);
}

/* Fixes for Dark Mode Modals and Text Utilities */
body.dark-mode .modal-content {
    background-color: #181818;
    border-color: #333;
    color: #F5F5F5;
}

body.dark-mode .text-muted {
    color: #a0a0a0 !important;
}

body.dark-mode .text-dark {
    color: #F5F5F5 !important;
}

body.dark-mode .text-success {
    color: #00FF41 !important;
}

body.dark-mode .bg-success.bg-opacity-10 {
    background-color: rgba(0, 255, 65, 0.1) !important;
}