/* ========================================
   MARTTIN AI - CSS PRINCIPAL
   Sistema de Design Coeso e Profissional
   ======================================== */

/* === VARIÁVEIS CSS === */
:root {
    /* Cores Primárias */
    --primary-blue: #1E3A8A;
    --secondary-blue: #3B82F6;
    --accent-blue: #60A5FA;
    --light-blue: #DBEAFE;
    
    /* Cores Neutras */
    --white: #FFFFFF;
    --light-gray: #F8FAFC;
    --medium-gray: #E2E8F0;
    --dark-gray: #64748B;
    --text-dark: #1F2937;
    --text-light: #6B7280;
    
    /* Cores de Status */
    --success: #10B981;
    --warning: #F59E0B;
    --danger: #EF4444;
    --info: #06B6D4;
    
    /* Tipografia */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Espaçamentos */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Bordas */
    --border-radius: 6px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;
    
    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Transições */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

/* === RESET E BASE === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--light-gray);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* === TIPOGRAFIA === */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--text-dark);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-light);
}

.lead {
    font-size: 1.125rem;
    font-weight: var(--font-weight-medium);
}

/* === LAYOUT === */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--spacing-lg);
}

/* === HEADER/NAVEGAÇÃO === */
.header {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
    color: var(--white);
    padding: var(--spacing-md) 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 
        0 8px 32px rgba(0,0,0,0.3),
        0 0 0 1px rgba(255,255,255,0.1),
        inset 0 1px 0 rgba(255,255,255,0.1);
    transition: var(--transition-normal);
    backdrop-filter: blur(20px);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    letter-spacing: 2px;
    color: #fbbf24;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.logo i {
    color: #e2e8f0;
    margin-right: var(--spacing-xs);
}

.logo a:hover {
    color: #ffffff !important;
    text-decoration: none;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
    margin: 0;
}

.nav-links a {
    color: #e2e8f0;
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    transition: var(--transition-fast);
    opacity: 0.9;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    position: relative;
}

.nav-links a:hover {
    opacity: 1;
    color: #fbbf24;
    background: rgba(251, 191, 36, 0.1);
    transform: translateY(-1px);
}

/* === BOTÕES === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius);
    font-family: var(--font-primary);
    font-weight: var(--font-weight-medium);
    font-size: 0.875rem;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-fast);
    min-height: 2.5rem;
    gap: var(--spacing-xs);
}

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

/* Variações de Botões */
.btn-primary {
    background-color: var(--primary-blue);
    color: var(--white);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--secondary-blue);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: transparent;
    color: #e2e8f0;
    border: 1px solid rgba(226, 232, 240, 0.3);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover:not(:disabled) {
    background-color: rgba(251, 191, 36, 0.1);
    color: #fbbf24;
    border-color: #fbbf24;
    transform: translateY(-1px);
}

.btn-primary {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    color: #1e293b;
    border: none;
    font-weight: var(--font-weight-semibold);
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: #1e293b;
    transform: translateY(-1px);
    box-shadow: 0 8px 25px rgba(251, 191, 36, 0.3);
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
    min-height: 3rem;
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.75rem;
    min-height: 2rem;
}

/* === CARDS === */
.card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: var(--transition-normal);
    border: 1px solid var(--medium-gray);
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.card-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--medium-gray);
    background-color: var(--light-gray);
}

.card-body {
    padding: var(--spacing-lg);
}

.card-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--medium-gray);
    background-color: var(--light-gray);
}

.card-title {
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}

/* === FORMULÁRIOS === */
.form-section {
    padding: calc(var(--spacing-3xl) + 4rem) var(--spacing-lg) var(--spacing-3xl);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--light-gray) 0%, var(--medium-gray) 100%);
}

.form-container {
    background: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 450px;
    text-align: center;
}

.form-container h2 {
    margin-bottom: var(--spacing-xl);
    color: var(--text-dark);
    font-size: 1.75rem;
}

.form-group {
    text-align: left;
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-dark);
    font-size: 0.875rem;
}

.form-input, .form-select, .form-textarea {
    width: 100%;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--medium-gray);
    font-size: 1rem;
    font-family: var(--font-primary);
    transition: var(--transition-fast);
    background-color: var(--white);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--secondary-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

/* Estilização automática para inputs do Django */
input[type="text"],
input[type="email"],
input[type="password"],
select,
textarea {
    width: 100%;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--medium-gray);
    font-size: 1rem;
    font-family: var(--font-primary);
    transition: var(--transition-fast);
    background-color: var(--white);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--secondary-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* === MAIN CONTENT === */
main {
    padding-top: 5rem; /* Compensar header fixo */
    min-height: calc(100vh - 5rem);
}

.page-header {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--white);
    padding: var(--spacing-2xl) 0;
    text-align: center;
}

.page-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.page-subtitle {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: 0;
}

/* === DASHBOARD === */
.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.stat-card {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    display: block;
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.9;
    margin-top: var(--spacing-xs);
}

/* === CHAT === */
.chat-container {
    height: 500px;
    overflow-y: auto;
    border: 1px solid var(--medium-gray);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    background-color: var(--white);
    margin-bottom: var(--spacing-lg);
}

.message {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-lg);
    max-width: 80%;
    animation: slideIn 0.3s ease-out;
}

.message.user {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--white);
    margin-left: auto;
    text-align: right;
}

.message.assistant {
    background-color: var(--light-gray);
    color: var(--text-dark);
    margin-right: auto;
    border: 1px solid var(--medium-gray);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* === FOOTER === */
.footer {
    background: transparent;
    color: var(--white);
    position: relative;
    padding: 4rem 2rem 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.footer-main {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex: 1;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: #fbbf24;
    text-decoration: none;
}

.footer-logo i {
    font-size: 1.75rem;
    color: #e2e8f0;
}

.footer-brand p {
    color: #94a3b8;
    margin: 0;
    font-size: 0.9rem;
    max-width: 300px;
}

.footer-links {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
}

.footer-links a {
    color: #94a3b8;
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    position: relative;
}

.footer-links a:hover {
    color: #fbbf24;
}

.footer-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: #fbbf24;
    transition: width 0.3s ease;
}

.footer-links a:hover::after {
    width: 100%;
}

.footer-bottom {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-bottom p {
    color: #64748b;
    margin: 0;
    font-size: 0.85rem;
}

/* Responsividade do Footer */
@media (max-width: 768px) {
    .footer {
        padding: 3rem 1.5rem 2rem;
    }
    
    .footer-main {
        flex-direction: column;
        align-items: flex-start;
        gap: 2rem;
    }
    
    .footer-links {
        flex-wrap: wrap;
        gap: 1.5rem;
    }
    
    .footer-bottom {
        justify-content: flex-start;
        gap: 1.5rem;
    }
    
    .footer-badges {
        flex-wrap: wrap;
        justify-content: center;
    }
}

/* === ALERTAS === */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid;
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    border-left-color: var(--success);
    color: var(--success);
}

.alert-warning {
    background-color: rgba(245, 158, 11, 0.1);
    border-left-color: var(--warning);
    color: var(--warning);
}

.alert-danger {
    background-color: rgba(239, 68, 68, 0.1);
    border-left-color: var(--danger);
    color: var(--danger);
}

.alert-info {
    background-color: rgba(6, 182, 212, 0.1);
    border-left-color: var(--info);
    color: var(--info);
}

/* === UTILITÁRIOS === */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.d-flex { display: flex; }
.d-grid { display: grid; }
.d-none { display: none; }
.d-block { display: block; }

.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }

.gap-1 { gap: var(--spacing-xs); }
.gap-2 { gap: var(--spacing-sm); }
.gap-3 { gap: var(--spacing-md); }
.gap-4 { gap: var(--spacing-lg); }

.w-full { width: 100%; }
.h-full { height: 100%; }

/* === RESPONSIVIDADE === */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .nav {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .nav-links {
        gap: var(--spacing-md);
    }
    
    .page-title {
        font-size: 2rem;
    }
    
    .dashboard-stats {
        grid-template-columns: 1fr;
    }
    
    .form-container {
        margin: var(--spacing-md);
        padding: var(--spacing-lg);
    }
    
    .message {
        max-width: 95%;
    }
}

@media (max-width: 480px) {
    .page-title {
        font-size: 1.75rem;
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
    
    .btn-lg {
        padding: var(--spacing-md);
        font-size: 0.875rem;
    }
}