/* ============================================================
   CHESSS3092 · Login — tema dorado/negro, tablero de ajedrez
   ============================================================ */

:root {
    --c-bg: #0c0b09;
    --c-panel: #14120f;
    --c-panel-border: #3a2f1c;
    --c-gold-1: #f2c879;
    --c-gold-2: #c9973f;
    --c-gold-3: #8a6423;
    --c-text: #f4efe4;
    --c-text-dim: #b9b0a0;
    --c-input-bg: #1b1814;
    --c-input-border: #4a3d24;
    --font-display: 'Cinzel', 'Georgia', serif;
    --font-body: 'Poppins', 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }

body.login-body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font-body);
    color: var(--c-text);
    background: var(--c-bg);
    position: relative;
    overflow-x: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px 16px;
}

/* Tablero de fondo, tenue, a lo ancho de toda la pantalla */
.tablero-fondo {
    position: fixed;
    inset: 0;
    z-index: 0;
    background-image:
        linear-gradient(135deg, rgba(0,0,0,0.88) 0%, rgba(10,8,5,0.94) 60%, rgba(0,0,0,0.92) 100%),
        repeating-conic-gradient(#171310 0% 25%, #0a0806 0% 50%);
    background-size: cover, 96px 96px;
    background-position: center;
}

.piezas-decorativas {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    opacity: 0.05;
    background-repeat: no-repeat;
    background-position: -60px 40%, calc(100% + 60px) 45%;
    background-size: 340px, 340px;
}

/* ---------------- Tarjeta principal ---------------- */
.login-card {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 460px;
    background: linear-gradient(180deg, var(--c-panel) 0%, #0f0d0a 100%);
    border: 1px solid var(--c-panel-border);
    border-radius: 22px;
    padding: 40px 36px 32px;
    box-shadow: 0 0 0 1px rgba(242,200,121,0.06), 0 30px 80px rgba(0,0,0,0.65);
    text-align: center;
    animation: aparecer 0.5s ease-out;
}

@keyframes aparecer {
    from { opacity: 0; transform: translateY(14px); }
    to   { opacity: 1; transform: translateY(0); }
}

.escudo-institucional {
    width: 108px;
    height: auto;
    filter: drop-shadow(0 6px 18px rgba(0,0,0,0.55));
    margin-bottom: 14px;
}

.divisor-corona {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: var(--c-gold-2);
    margin: 8px 0 10px;
}
.divisor-corona::before,
.divisor-corona::after {
    content: '';
    height: 1px;
    width: 44px;
    background: linear-gradient(90deg, transparent, var(--c-gold-3));
}
.divisor-corona::after { background: linear-gradient(90deg, var(--c-gold-3), transparent); }

.marca-titulo {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(2rem, 6vw, 2.6rem);
    letter-spacing: 1px;
    margin: 0;
    line-height: 1;
}
.marca-titulo .num {
    background: linear-gradient(180deg, var(--c-gold-1), var(--c-gold-3));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.marca-subtitulo {
    font-family: var(--font-display);
    font-size: 0.8rem;
    letter-spacing: 3px;
    color: var(--c-gold-2);
    text-transform: uppercase;
    margin: 6px 0 14px;
}

.lema-fila {
    display: flex;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
    font-size: 0.72rem;
    letter-spacing: 1.5px;
    color: var(--c-text-dim);
    text-transform: uppercase;
    margin-bottom: 24px;
}
.lema-fila span::after {
    content: '•';
    margin-left: 14px;
    color: var(--c-gold-3);
}
.lema-fila span:last-child::after { content: ''; margin: 0; }

/* ---------------- Formulario ---------------- */
.form-login .input-group {
    margin-bottom: 16px;
}

.campo-icono {
    position: relative;
}

.campo-icono i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--c-gold-2);
    font-size: 1rem;
    pointer-events: none;
}

.campo-icono input {
    width: 100%;
    background: var(--c-input-bg);
    border: 1px solid var(--c-input-border);
    border-radius: 12px;
    padding: 14px 16px 14px 46px;
    color: var(--c-text);
    font-size: 0.95rem;
    font-family: var(--font-body);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.campo-icono input::placeholder { color: #7a7264; }

.campo-icono input:focus {
    outline: none;
    border-color: var(--c-gold-2);
    box-shadow: 0 0 0 3px rgba(201,151,63,0.18);
}

.toggle-password {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--c-text-dim);
    cursor: pointer;
    font-size: 1rem;
    padding: 4px;
}
.toggle-password:hover { color: var(--c-gold-1); }
.toggle-password:focus-visible { outline: 2px solid var(--c-gold-2); border-radius: 6px; }

.btn-iniciar-sesion {
    width: 100%;
    margin-top: 6px;
    padding: 14px 18px;
    border: none;
    border-radius: 12px;
    background: linear-gradient(180deg, var(--c-gold-1), var(--c-gold-2));
    color: #1a1206;
    font-weight: 700;
    letter-spacing: 1px;
    font-size: 0.95rem;
    text-transform: uppercase;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: transform 0.15s, box-shadow 0.15s, filter 0.15s;
}
.btn-iniciar-sesion:hover { filter: brightness(1.06); transform: translateY(-1px); box-shadow: 0 10px 24px rgba(201,151,63,0.28); }
.btn-iniciar-sesion:active { transform: translateY(0); }
.btn-iniciar-sesion:disabled { opacity: 0.7; cursor: not-allowed; transform: none; }
.btn-iniciar-sesion:focus-visible { outline: 2px solid #fff; outline-offset: 2px; }

.mensaje-error {
    background: rgba(210,60,50,0.12);
    border: 1px solid rgba(210,60,50,0.45);
    color: #f3a9a2;
    border-radius: 10px;
    padding: 10px 14px;
    font-size: 0.85rem;
    margin-bottom: 16px;
    display: none;
    text-align: left;
}
.mensaje-error.visible { display: block; }

.divisor-fino {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--c-gold-3);
    margin: 22px 0 16px;
}
.divisor-fino::before, .divisor-fino::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--c-panel-border);
}

/* ---------------- Fila de iconos inferior (solo desktop) ---------------- */
.fila-beneficios {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    margin-top: 28px;
    flex-wrap: wrap;
}
.beneficio {
    flex: 1;
    min-width: 84px;
    text-align: center;
    color: var(--c-gold-2);
}
.beneficio i { font-size: 1.25rem; display: block; margin-bottom: 6px; }
.beneficio .titulo { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.5px; color: var(--c-text); text-transform: uppercase; }
.beneficio .desc { font-size: 0.62rem; color: var(--c-text-dim); }

/* ---------------- Responsive ---------------- */
@media (max-width: 480px) {
    .login-card { padding: 32px 22px 26px; border-radius: 18px; }
    .escudo-institucional { width: 92px; }
    .fila-beneficios { display: grid; grid-template-columns: repeat(4, 1fr); }
    .lema-fila { gap: 8px; }
    .lema-fila span::after { margin-left: 8px; }
}

@media (min-width: 481px) and (max-width: 767px) {
    .fila-beneficios { display: grid; grid-template-columns: repeat(3, 1fr); row-gap: 16px; }
}

/* Respeta preferencia de menos movimiento */
@media (prefers-reduced-motion: reduce) {
    .login-card { animation: none; }
    .btn-iniciar-sesion:hover { transform: none; }
}