/**
 * Estilos Principais da Plataforma de Cursos
 * Design moderno e responsivo
 */

/* ========== Reset e Variáveis ========== */
:root {
    --primary-color: #e50914;
    --secondary-color: #564d4d;
    --bg-dark: #141414;
    --bg-darker: #0a0a0a;
    --bg-light: #1f1f1f;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --border-color: #333333;
    --success-color: #46d369;
    --error-color: #e50914;
    --warning-color: #ffa500;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
}

a:not(.btn):hover {
    color: var(--primary-color) !important;
}


img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ========== Utilitários ========== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

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

.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 20px; }
.mt-3 { margin-top: 30px; }
.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }
.mb-3 { margin-bottom: 30px; }

/* ========== Botões ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background-color: #f40612;
    transform: scale(1.05);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
}

.btn-secondary:hover:not(:disabled) {
    background-color: rgba(255, 255, 255, 0.3);
}

.btn-block {
    width: 100%;
    justify-content: center;
}

.btn-large {
    padding: 15px 30px;
    font-size: 16px;
}

.btn-small {
    padding: 6px 12px;
    font-size: 12px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 14px;
    transition: var(--transition);
}

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

.form-group small {
    display: block;
    margin-top: 5px;
    color: var(--text-secondary);
    font-size: 12px;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
}

/* ========== Mensagens ========== */
.message {
    padding: 15px;
    border-radius: 4px;
    margin-bottom: 20px;
    display: none;
}

.message.success {
    background-color: rgba(70, 211, 105, 0.2);
    border: 1px solid var(--success-color);
    color: var(--success-color);
}

.message.error {
    background-color: rgba(229, 9, 20, 0.2);
    border: 1px solid var(--error-color);
    color: var(--error-color);
}

.message.warning {
    background-color: rgba(255, 165, 0, 0.2);
    border: 1px solid var(--warning-color);
    color: var(--warning-color);
}

/* ========== Loading ========== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ========== Modal ========== */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    overflow: auto;
}

.modal-content {
    background-color: var(--bg-light);
    margin: 5% auto;
    padding: 30px;
    border-radius: 8px;
    max-width: 600px;
    position: relative;
    animation: modalFadeIn 0.3s;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 28px;
    font-weight: bold;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

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

/* ========== Página de Autenticação ========== */
.auth-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--bg-darker) 0%, var(--bg-dark) 100%);
}

.auth-container {
    width: 100%;
    max-width: 450px;
    padding: 20px;
}

.auth-box {
    background-color: rgba(0, 0, 0, 0.75);
    padding: 60px 68px 40px;
    border-radius: 8px;
}

.auth-header {
    margin-bottom: 30px;
    text-align: center;
}

.auth-header h1 {
    font-size: 32px;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.auth-header p {
    color: var(--text-secondary);
}

.auth-form {
    margin-bottom: 20px;
}

.auth-footer {
    margin-top: 20px;
    text-align: center;
    color: var(--text-secondary);
}

.auth-footer a {
    color: var(--primary-color);
    font-weight: 600;
}

/* ========== Links ========== */
.link-primary {
    color: var(--primary-color);
}

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

.link-secondary:hover {
    text-decoration: underline;
}

/* ========== Responsividade ========== */
@media (max-width: 768px) {
    .auth-box {
        padding: 40px 30px;
    }
    
    .auth-header h1 {
        font-size: 24px;
    }
    
    .form-options {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
}

/* ========== Scrollbar Customizada ========== */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-darker);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}
/* ================================
   🌕 TEMA CLARO (body.light-mode)
=================================== */

body.light-mode {
    --bg-dark: #ffffff;
    --bg-light: #f7f7f7;
    --text-primary: #111111;
    --text-secondary: #555555;

    --card-bg: #ffffff;
    --border-color: #dcdcdc;

    --navbar-bg: #ffffff;
    --navbar-text: #111111;

    --input-bg: #ffffff;
    --input-text: #111111;
    --input-border: #cccccc;

    --button-bg: #e50914; /* mantém vermelho oficial */
    --button-text: #ffffff;

    --hover-bg: rgba(0,0,0,0.05);

    color-scheme: light;
}

/* Reforço visual para garantir contraste */
body.light-mode .navbar,
body.light-mode nav.navbar.scrolled {
    background-color: var(--navbar-bg) !important;
    color: var(--navbar-text) !important;
}

body.light-mode .navbar a,
body.light-mode .navbar .navbar-brand {
    color: var(--navbar-text) !important;
}

body.light-mode .content-card,
body.light-mode .content-card-profile,
body.light-mode .sidebar,
body.light-mode .pdf-viewer,
body.light-mode .playlist-card {
    background-color: var(--card-bg) !important;
    color: var(--text-primary) !important;
}

body.light-mode .card-body-profile p,
body.light-mode p,
body.light-mode span {
    color: var(--text-secondary) !important;
}
body.light-mode .card-type-badge {
    background-color: rgba(255, 255, 255, 0.8) !important;
    color: #000 !important;
}

body.light-mode .btn-primary {
    background-color: var(--primary-color);
    color: #ffffff !important;
}
body.light-mode .a:hover {
    color: #ffffff !important;
    }
/* Logo em páginas de autenticação */
.auth-logo {
    text-align: center;
    margin-bottom: 20px;
}

.auth-logo .site-logo {
    max-width: 220px;
    width: 80%;
    height: auto;
    display: block;
    margin: 0 auto;
}

@media(max-width: 480px) {
    .auth-logo .site-logo {
        max-width: 160px;
    }
}