/* 
    Tokens and Base Styles for MeuAmigoAI MVP
    Following: Dark mode preference, glassmorphism, vibrant but serious tone, modern UX
*/

:root {
    --bg-base: #0f1115;
    --bg-surface: #1a1d24;
    --bg-surface-hover: #22262e;
    
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --accent-primary: #6366f1; /* Indigo vibrant */
    --accent-primary-hover: #4f46e5;
    
    --error-bg: rgba(239, 68, 68, 0.1);
    --error-text: #ef4444;
    
    --border-color: #334155;
    
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-pill: 9999px;
    
    --font-base: 'Inter', system-ui, -apple-system, sans-serif;
    
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
}

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

body {
    font-family: var(--font-base);
    background-color: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* Utilities */
.bg-dark { background-color: var(--bg-base); }
.flex-center {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}
.mb-4 { margin-bottom: 1.5rem; }

/* Auth Layout */
.auth-container {
    width: 100%;
    max-width: 420px;
    padding: 2.5rem;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
}

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

.auth-title {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    background: linear-gradient(to right, #818cf8, #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.auth-subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.privacy-notice {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.03);
    padding: 1rem;
    border-radius: var(--radius-md);
    border-left: 3px solid var(--text-muted);
}

/* Forms */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

input[type="email"],
input[type="password"],
input[type="text"] {
    width: 100%;
    padding: 0.75rem 1rem;
    background-color: var(--bg-base);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: var(--font-base);
    transition: var(--transition-fast);
}

input[type="email"]:focus,
input[type="password"]:focus,
input[type="text"]:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

input::placeholder {
    color: var(--text-muted);
}

/* Buttons */
.btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    border: none;
    transition: var(--transition-normal);
}

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

.btn-primary:hover {
    background-color: var(--accent-primary-hover);
    transform: translateY(-1px);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-block {
    width: 100%;
}

/* Alerts */
.alert {
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
}

.alert-error {
    background-color: var(--error-bg);
    color: var(--error-text);
    border: 1px solid rgba(239, 68, 68, 0.2);
}