:root {
    /* Paleta Dark & Neon */
    --bg-dark: #0f172a;
    /* Slate oscuro translúcido */
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    /* Sky Blue */
    --primary: #38bdf8;
    --primary-glow: rgba(56, 189, 248, 0.5);
    --text-white: #f8fafc;
    --text-muted: #94a3b8;
    --error: #ef4444;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    color: var(--text-white);
}

/* --- Fondo Decorativo --- */
.background-shapes .shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    z-index: -1;
    opacity: 0.5;
}
.shape-1 { top: -10%; left: -10%; width: 500px; height: 500px; background: #6366f1; }
.shape-2 { bottom: -10%; right: -10%; width: 400px; height: 400px; background: #ec4899; }
.shape-3 { top: 40%; left: 40%; width: 300px; height: 300px; background: #38bdf8; opacity: 0.3; }

/* --- Contenedor Principal --- */
.auth-wrapper {
    width: 100%;
    padding: 20px;
    display: flex;
    justify-content: center;
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    gap: 30px;
}

/* Header */
.auth-header { text-align: center; }
.logo-area {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 15px;
    filter: drop-shadow(0 0 10px var(--primary-glow));
}
.auth-header h2 { font-weight: 600; font-size: 1.8rem; margin-bottom: 5px; }
.subtitle { color: var(--text-muted); font-size: 0.9rem; }

/* --- Inputs Modernos (Floating Labels) --- */
.input-group {
    position: relative;
    margin-bottom: 25px;
}

/* Icono dentro del input */
.input-icon {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1rem;
    transition: 0.3s;
    z-index: 2;
}

.input-group input {
    width: 100%;
    /* Fondo más oscuro para el input */
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    /* Espacio para iconos */
    padding: 16px 45px;
    color: var(--text-white);
    font-size: 1rem;
    outline: none;
    transition: all 0.3s ease;
}

/* Label Flotante */
.input-group label {
    position: absolute;
    left: 45px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
    transition: 0.3s ease;
    font-size: 0.95rem;
}

/* Estados Focus/Lleno */
.input-group input:focus,
.input-group input:not(:placeholder-shown) {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.1);
}

.input-group input:focus ~ .input-icon { color: var(--primary); }

.input-group input:focus ~ label,
.input-group input:not(:placeholder-shown) ~ label {
    top: 0;
    left: 15px;
    font-size: 0.75rem;
    /* Hack para tapar la línea */
    background: var(--bg-dark);
    padding: 0 5px;
    color: var(--primary);
    border-radius: 4px;
}

/* Botón Ver Password */
.toggle-pass {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
}
.toggle-pass:hover { color: var(--text-white); }

/* --- Botones --- */
.btn-glass {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 20px;
    border-radius: 12px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s;
    font-family: inherit;
    border: 1px solid transparent;
}

.btn-glass.full-width { width: 100%; }

.btn-glass.primary {
    background: linear-gradient(135deg, var(--primary), #3b82f6);
    color: #fff;
    box-shadow: 0 4px 15px var(--primary-glow);
}
.btn-glass.primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px var(--primary-glow); }

.btn-glass.secondary {
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-white);
    width: 100%;
}
.btn-glass.secondary:hover { background: rgba(255,255,255,0.1); }

/* --- Estado Logueado --- */
.logged-in { text-align: center; }
.user-status-icon {
    font-size: 3rem;
    /* Verde éxito */
    color: #10b981;
    margin-bottom: 10px;
}
.status-msg { margin-bottom: 25px; color: var(--text-muted); }
.action-buttons { display: flex; flex-direction: column; gap: 15px; }

/* --- Error Box --- */
.error-glass {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* --- Footer --- */
.auth-footer {
    text-align: center;
    border-top: 1px solid var(--glass-border);
    padding-top: 20px;
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.back-link { color: var(--text-muted); text-decoration: none; transition: 0.2s; }
.back-link:hover { color: var(--primary); }

/* Mobile responsive */
@media (max-width: 480px) {
    .glass-card { padding: 30px 20px; }
}