/* ================= VARIABLES ================= */

:root {
    --bg-color: #000;
    --text-color: #ffffff;
    --sub-color: #bbbbbb;
    --card-bg: rgba(20,20,20,0.65);
    --input-bg: rgba(255,255,255,0.05);
    --border-color: rgba(0,191,255,0.4);
    --primary: #00bfff;
    --logo-glow: drop-shadow(0 0 20px #00bfff);
}

body.light-mode {
    --bg-color: #f4f6f9;
    --text-color: #111;
    --sub-color: #555;
    --card-bg: rgba(255,255,255,0.95);
    --input-bg: #ffffff;
    --border-color: rgba(0,123,255,0.4);
    --primary: #007bff;
    --logo-glow: none;
}

/* ================= BASE ================= */

html, body {
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    background: var(--bg-color);
    transition: background 0.3s ease;
}

/* ===== HALOS SOLO EN DARK ===== */

body::before,
body::after {
    content: "";
    position: fixed;
    z-index: 0;
    pointer-events: none;
    filter: blur(120px);
    transition: opacity 0.3s ease;
}

body::before {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(0,191,255,0.6) 0%, transparent 70%);
    top: -200px;
    left: -200px;
}

body::after {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(0,150,255,0.5) 0%, transparent 70%);
    bottom: -150px;
    right: -150px;
}

body.light-mode::before,
body.light-mode::after {
    background: radial-gradient(circle, rgba(0,191,255,0.6) 0%, transparent 30%),
            radial-gradient(circle, rgba(0,150,255,0.5) 0%, transparent 30%);
}

/* ================= CONTENEDOR ================= */

.main-container {
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 2;
}

/* Limita ancho en escritorio para que no quede tan separado */
.custom-row {
    max-width: 1500px;
    margin: 0 auto;
}

/* ================= LOGO ================= */

.logo-img {
    width: 380px;
    margin-bottom: 30px;
    filter: var(--logo-glow);
    transition: 0.3s ease;
}

/* ================= TEXTOS ================= */

.welcome-text {
    font-size: 34px;
    font-weight: 600;
    color: var(--text-color);
}

.welcome-sub {
    margin-top: 15px;
    font-size: 16px;
    color: var(--sub-color);
}

/* ================= CARD ================= */

.login-card {
    background: var(--card-bg);
    backdrop-filter: blur(15px);
    border-radius: 18px;
    padding: 45px;          /* antes 40 */
    width: 100%;
    max-width: 440px;       /* antes 380 */
    border: 1px solid var(--border-color);
    color: var(--text-color);
    transition: 0.3s ease;
}

label {
    color: var(--text-color);
    font-size: 14px;
}

.input-group-text {
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--primary);
}

.form-control {
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 8px var(--primary);
}

.btn-jv {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
    height: 45px;
    font-weight: 600;
    transition: 0.3s;
}

.btn-jv:hover {
    background: var(--primary);
    color: #fff;
}

a {
    color: var(--primary);
    font-size: 13px;
}

/* ================= BOTÓN TEMA ================= */

.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 999;
    border: none;
    background: var(--card-bg);
    border-radius: 50px;
    padding: 8px 14px;
    cursor: pointer;
    color: var(--text-color);
    border: 1px solid var(--border-color);
    transition: 0.3s;
}

/* ================= RESPONSIVE ================= */

@media (max-width: 991px) {

    .logo-img {
        width: 200px;
        margin-bottom: 15px;
    }

    .welcome-text {
        font-size: 22px;
    }

    .welcome-sub {
        font-size: 13px;
        margin-bottom: 20px;
    }

    .login-card {
        padding: 25px;
        max-width: 100%;
    }
}

@media (max-height: 700px) {

    .logo-img {
        width: 160px;
        margin-bottom: 10px;
    }

    .welcome-text {
        font-size: 18px;
    }

    .welcome-sub {
        display: none;
    }

    .login-card {
        padding: 20px;
    }
}