/* =========================================
   BASE VARIABLES
========================================= */
:root {
    --bg-color: #050505;        /* Negro más profundo */
    --panel-bg: rgba(15, 15, 18, 0.6); /* Transparencia elegante */
    --accent: #00f2ff;          /* Cyan Sci-Fi */
    --text-main: #e0e0e0;       /* Gris muy claro, no blanco puro */
    --text-muted: #666666;
    --border-color: rgba(255, 255, 255, 0.1);

    --font-ui: 'Inter', sans-serif;
    --font-display: 'Orbitron', sans-serif;
    --font-mono: 'Fira Code', monospace;
}

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

body {
    background:
        linear-gradient(180deg, rgba(3, 6, 10, 0.72), rgba(3, 6, 10, 0.9)),
        url('Multimedia/Login.jpg') center/cover no-repeat fixed;
    color: var(--text-main);
    font-family: var(--font-ui);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* =========================================
   LOGIN PAGE STYLES
========================================= */

.container {
    text-align: center;
    z-index: 2;
    width: min(96vw, 820px);
    max-width: 820px;
    padding: 28px;
}

.hero {
    width: 100%;
}

h1.glitch {
    font-family: var(--font-display);
    font-size: clamp(4.8rem, 11vw, 8.2rem);
    font-weight: 900;
    color: #fff;
    letter-spacing: 0.2em;
    text-shadow: 0 0 18px rgba(0, 242, 255, 0.45);
    margin-bottom: 8px;
}

.subtitle {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-muted);
    letter-spacing: 2px;
}

.description {
    margin: 26px 0 30px;
    font-weight: 300;
    font-size: clamp(1rem, 2.4vw, 1.2rem);
    color: var(--text-muted);
}

.welcome-call {
    color: var(--accent);
    font-weight: 600;
    text-transform: uppercase;
    font-size: clamp(1rem, 2.1vw, 1.35rem);
    letter-spacing: 0.15em;
    margin-bottom: 10px;
}

/* Panel de Login */
.auth-box {
    background: rgba(10, 14, 20, 0.78);
    border: 1px solid rgba(132, 222, 243, 0.24);
    padding: clamp(26px, 3.8vw, 42px);
    border-radius: 10px;
    backdrop-filter: blur(8px);
    box-shadow: 0 10px 35px rgba(0, 0, 0, 0.45), inset 0 0 0 1px rgba(255, 255, 255, 0.03);
}

.tabs {
    display: flex;
    margin-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
}

.tabs button {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-muted);
    padding: 15px;
    cursor: pointer;
    font-family: var(--font-display);
    font-size: 1rem;
    letter-spacing: 0.08em;
    transition: all 0.3s ease;
}

.tabs button.active {
    color: var(--accent);
    border-bottom: 2px solid var(--accent);
}

.tabs button:hover:not(.active) {
    color: var(--text-main);
}

.input-group input {
    width: 100%;
    background: rgba(0, 0, 0, 0.42);
    border: 1px solid rgba(171, 236, 250, 0.18);
    padding: 16px;
    margin-bottom: 17px;
    color: var(--text-main);
    font-family: var(--font-mono);
    font-size: 1rem;
    border-radius: 4px;
    transition: border-color 0.3s ease;
}

.input-group input:focus {
    outline: none;
    border-color: var(--accent);
}

.btn-primary {
    width: 100%;
    padding: 16px;
    margin-top: 12px;
    background: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
    font-family: var(--font-display);
    font-size: 1rem;
    letter-spacing: 0.14em;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background: var(--accent);
    color: #000;
    box-shadow: 0 0 15px rgba(0, 242, 255, 0.4);
}

.overlay {
    position: fixed;
    inset: 0;
    background: radial-gradient(1200px 600px at 50% -10%, rgba(0, 242, 255, 0.1), transparent 60%), rgba(0, 0, 0, 0.3);
    pointer-events: none;
    z-index: 1;
}

@media (max-width: 720px) {
    .container {
        width: 100%;
        padding: 18px;
    }

    h1.glitch {
        letter-spacing: 0.12em;
    }
}