:root {
    --primary: #a0ff68; /* Verde neón de MyStock */
    --primary-hover: #a0ff70;
    --bg-page: #0f1111; /* Fondo oscuro profundo */
    --bg-card: #1a3357; /* Gris muy oscuro para el contenedor */
    --text-main: #ffffff;
    --text-muted: #a1a1aa;
    --border: #2d2f2f;
    --error-bg: #2d1616;
    --error-text: #ff6b6b;
}

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background-color: var(--bg-page);
    background-image: radial-gradient(circle at center, #1a1d1d 0%, #81ff9e 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.login-box {
    background: var(--bg-card);
    padding: 48px 40px;
    border-radius: 24px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
    width: 100%;
    max-width: 250px;
    text-align: center;
    border: 1px solid var(--border);
}

.logo-text {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 10px;
    color: white;
}

.logo-text span {
    color: var(--primary);
}

h2 { 
    color: var(--text-main); 
    margin-bottom: 8px; 
    font-weight: 700; 
    letter-spacing: -0.025em; 
}

p { 
    color: var(--text-muted); 
    font-size: 14px; 
    margin-bottom: 32px; 
}

label { 
    display: block; 
    text-align: left; 
    font-size: 12px; 
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 700; 
    color: var(--text-muted); 
    margin-bottom: 8px; 
}

input {
    width: 100%;
    padding: 14px 16px;
    margin-bottom: 24px;
    border: 1px solid var(--border);
    border-radius: 12px;
    box-sizing: border-box;
    font-size: 15px;
    transition: all 0.3s;
}

input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 1px var(--primary);
}

button {
    width: 100%;
    padding: 14px;
    background-color: var(--primary);
    color: #000; /* Texto oscuro sobre fondo verde para contraste */
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s, background 0.2s;
}

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

button:active {
    transform: translateY(1px);
}

.error-msg { 
    background-color: var(--error-bg); 
    color: var(--error-text); 
    padding: 12px; 
    border-radius: 10px; 
    font-size: 13px; 
    margin-bottom: 20px; 
    display: none; 
    border: 1px solid var(--error-text);
}

.signup-link {
    margin-top: 24px;
    font-size: 14px;
    color: var(--text-muted);
}

.signup-link a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}