/**
 * Login — Sistema EEG · Acceso institucional v5
 * Diseño clínico profesional: split brand + tarjeta, 100% responsive,
 * modo claro/oscuro automático según el dispositivo.
 */
:root {
    --lg-teal: #0d9488;
    --lg-teal-dark: #0f766e;
    --lg-teal-darker: #115e59;
    --lg-cyan: #0891b2;
    --lg-ink: #0e1b1d;

    --lg-bg: #eef5f4;
    --lg-surface: #ffffff;
    --lg-text: #0e1b1d;
    --lg-muted: #5c7375;
    --lg-border: #d7e6e4;
    --lg-border-soft: #e7f0ef;
    --lg-input-bg: #ffffff;
    --lg-input-disabled-bg: #eef3f3;
    --lg-label: #2c4143;
    --lg-placeholder: #93aaac;

    --lg-radius: 24px;
    --lg-radius-sm: 13px;
    --lg-gradient: linear-gradient(135deg, #0f766e 0%, #0d9488 48%, #0891b2 100%);
    --lg-gradient-brand: linear-gradient(160deg, #0f766e 0%, #0b6b63 34%, #0e5a63 68%, #0a4f57 100%);
    --lg-ring: rgba(13, 148, 136, 0.18);
    --lg-shadow-card: 0 30px 70px rgba(6, 46, 43, 0.16), 0 10px 24px rgba(6, 46, 43, 0.08);
}

* { box-sizing: border-box; }

.login-page {
    min-height: 100dvh;
    margin: 0;
    background: var(--lg-bg);
    color: var(--lg-text);
    font-family: var(--font, -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.login-wrap {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    min-height: 100dvh;
}

/* ═══════════════ Panel de marca (institucional) ═══════════════ */
.login-brand {
    position: relative;
    overflow: hidden;
    color: #eafaf7;
    background: var(--lg-gradient-brand);
    isolation: isolate;
}

.login-brand::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(ellipse 70% 55% at 12% 8%, rgba(255, 255, 255, 0.16) 0%, transparent 55%),
        radial-gradient(ellipse 65% 60% at 92% 96%, rgba(8, 145, 178, 0.4) 0%, transparent 55%),
        radial-gradient(ellipse 50% 40% at 100% 0%, rgba(45, 212, 191, 0.28) 0%, transparent 50%);
    pointer-events: none;
}

/* Retícula sutil tipo documento clínico */
.login-brand::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    background-size: 44px 44px;
    mask-image: radial-gradient(ellipse 90% 80% at 30% 40%, #000 0%, transparent 78%);
    -webkit-mask-image: radial-gradient(ellipse 90% 80% at 30% 40%, #000 0%, transparent 78%);
    opacity: 0.6;
    pointer-events: none;
}

.login-brand__inner {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    min-height: 100%;
    padding: clamp(36px, 4.4vw, 68px);
    gap: clamp(22px, 3.4vh, 40px);
}

.login-brand__top {
    display: flex;
    align-items: center;
    gap: 15px;
}

.login-brand__logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.14);
    border: 1px solid rgba(255, 255, 255, 0.28);
    backdrop-filter: blur(6px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.22);
    flex-shrink: 0;
    animation: lgFadeIn 0.6s ease both;
}

.login-brand__logo img { width: 40px; height: 40px; }

.login-brand__id strong {
    display: block;
    font-size: 1.24rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.login-brand__id span {
    display: block;
    margin-top: 3px;
    font-size: 0.85rem;
    color: rgba(234, 250, 247, 0.78);
}

.login-brand__hero {
    margin-top: auto;
    max-width: 34rem;
    animation: lgFadeIn 0.7s 0.08s ease both;
}

.login-brand__hero h2 {
    margin: 0;
    font-size: clamp(1.7rem, 3vw, 2.5rem);
    font-weight: 800;
    line-height: 1.14;
    letter-spacing: -0.035em;
}

.login-brand__hero p {
    margin: 14px 0 0;
    max-width: 30rem;
    font-size: 0.98rem;
    line-height: 1.6;
    color: rgba(234, 250, 247, 0.82);
}

/* Lista de características institucionales */
.login-brand__features {
    display: grid;
    gap: 12px;
    animation: lgFadeIn 0.7s 0.16s ease both;
}

.login-brand__feature {
    display: flex;
    align-items: center;
    gap: 13px;
    font-size: 0.94rem;
    font-weight: 600;
    color: rgba(234, 250, 247, 0.94);
}

.login-brand__feature span.ic {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 11px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.2);
    flex-shrink: 0;
}

.login-brand__feature svg { width: 19px; height: 19px; stroke: #eafaf7; }

.login-brand__wave {
    color: rgba(255, 255, 255, 0.4);
}

.login-brand__wave svg { width: 100%; height: 46px; display: block; }

.login-brand__wave path {
    stroke-dasharray: 1400;
    stroke-dashoffset: 1400;
    animation: lgWave 3.6s ease-out forwards;
}

.login-brand__foot {
    margin: 0;
    font-size: 0.7rem;
    line-height: 1.5;
    color: rgba(234, 250, 247, 0.55);
}

/* ═══════════════ Panel de formulario ═══════════════ */
.login-main {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(24px, 4vw, 56px);
    background:
        radial-gradient(ellipse 90% 60% at 100% 0%, rgba(13, 148, 136, 0.1) 0%, transparent 55%),
        radial-gradient(ellipse 80% 60% at 0% 100%, rgba(8, 145, 178, 0.08) 0%, transparent 55%),
        var(--lg-bg);
}

.login-panel {
    position: relative;
    width: 100%;
    max-width: 448px;
    background: var(--lg-surface);
    border: 1px solid var(--lg-border-soft);
    border-radius: var(--lg-radius);
    box-shadow: var(--lg-shadow-card);
    overflow: hidden;
    animation: lgFadeIn 0.55s cubic-bezier(0.22, 1, 0.36, 1) both;
}

/* Barra de acento superior */
.login-panel::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--lg-gradient);
}

.login-panel__head {
    padding: clamp(30px, 4vw, 40px) clamp(26px, 4vw, 36px) 6px;
    text-align: center;
}

.login-panel__logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 66px;
    height: 66px;
    margin: 0 auto 18px;
    border-radius: 20px;
    background: var(--lg-gradient);
    box-shadow: 0 12px 30px rgba(13, 148, 136, 0.34);
}

.login-panel__logo img { width: 40px; height: 40px; filter: brightness(0) invert(1); }

.login-panel__head h1 {
    margin: 0;
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: -0.035em;
    color: var(--lg-text);
}

.login-panel__head p {
    margin: 10px 0 0;
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--lg-muted);
}

.login-panel__body {
    padding: clamp(22px, 4vw, 32px) clamp(26px, 4vw, 36px);
}

.login-lock-notice {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 20px;
    padding: 12px 14px;
    font-size: 0.84rem;
    line-height: 1.45;
    color: #92400e;
    background: #fffbeb;
    border: 1px solid #fcd34d;
    border-radius: var(--lg-radius-sm);
}

.login-lock-notice svg { width: 18px; height: 18px; flex-shrink: 0; margin-top: 1px; }

.login-form .field-group { margin-bottom: 18px; }

.login-form .field-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.01em;
    color: var(--lg-label);
}

.login-input-wrap {
    position: relative;
    display: flex;
    align-items: center;
}

.login-input-ic {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--lg-muted);
    pointer-events: none;
    z-index: 1;
    transition: color 0.2s ease;
}

.login-form .login-input-wrap input[type="text"],
.login-form .login-input-wrap input[type="password"] {
    width: 100%;
    height: 52px;
    padding: 0 16px 0 47px;
    font-size: 16px;
    color: var(--lg-text);
    background: var(--lg-input-bg);
    border: 1.5px solid var(--lg-border);
    border-radius: var(--lg-radius-sm);
    box-sizing: border-box;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.login-form .login-input-wrap input::placeholder { color: var(--lg-placeholder); }

.login-form .login-input-wrap input:focus {
    outline: none;
    border-color: var(--lg-teal);
    box-shadow: 0 0 0 4px var(--lg-ring);
}

.login-form .login-input-wrap:focus-within .login-input-ic { color: var(--lg-teal); }

.login-form .login-input-wrap input:disabled {
    background: var(--lg-input-disabled-bg);
    color: var(--lg-placeholder);
    cursor: not-allowed;
}

.login-password-wrap input { padding-right: 50px !important; }

.btn-toggle-pass {
    position: absolute;
    right: 9px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 2;
    padding: 9px;
    border: none;
    background: none;
    color: var(--lg-muted);
    cursor: pointer;
    border-radius: 10px;
    line-height: 0;
    transition: color 0.15s ease, background 0.15s ease;
}

.btn-toggle-pass:hover {
    color: var(--lg-teal);
    background: rgba(13, 148, 136, 0.1);
}

.btn-toggle-pass svg { width: 18px; height: 18px; }

.btn-login {
    position: relative;
    width: 100%;
    margin-top: 10px;
    height: 52px;
    padding: 0 16px !important;
    font-size: 1rem !important;
    font-weight: 700 !important;
    letter-spacing: 0.01em;
    color: #fff !important;
    background: var(--lg-gradient) !important;
    border: none !important;
    border-radius: var(--lg-radius-sm) !important;
    cursor: pointer;
    overflow: hidden;
    box-shadow: 0 10px 26px rgba(13, 148, 136, 0.36);
    transition: filter 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
}

/* Brillo sutil al pasar el cursor */
.btn-login::after {
    content: "";
    position: absolute;
    top: 0;
    left: -60%;
    width: 40%;
    height: 100%;
    background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.35), transparent);
    transform: skewX(-18deg);
    transition: left 0.5s ease;
}

.btn-login:hover:not(:disabled) {
    filter: brightness(1.05);
    transform: translateY(-2px);
    box-shadow: 0 16px 34px rgba(13, 148, 136, 0.42);
}

.btn-login:hover:not(:disabled)::after { left: 130%; }

.btn-login:active:not(:disabled) { transform: translateY(0); }

.btn-login:disabled,
.btn-login.is-loading {
    opacity: 0.72;
    cursor: wait;
    box-shadow: none;
    transform: none;
}

.btn-login__label { display: inline-flex; align-items: center; justify-content: center; gap: 9px; }

.btn-login__spinner {
    display: none;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.35);
    border-top-color: #fff;
    border-radius: 50%;
    animation: loginSpin 0.7s linear infinite;
}

.btn-login.is-loading .btn-login__spinner { display: inline-block; }

.login-panel__foot {
    padding: 16px clamp(26px, 4vw, 36px) 24px;
    border-top: 1px solid var(--lg-border-soft);
    text-align: center;
}

.login-panel__foot p { margin: 0; }

.login-secure-note {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 0.74rem;
    color: var(--lg-muted);
}

.login-secure-note svg { width: 15px; height: 15px; color: var(--lg-teal); flex-shrink: 0; }

.hp-field { position: absolute; left: -9999px; opacity: 0; height: 0; overflow: hidden; }

@keyframes loginSpin { to { transform: rotate(360deg); } }
@keyframes lgWave { to { stroke-dashoffset: 0; } }
@keyframes lgFadeIn {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ═══════════════ Responsive ═══════════════ */
@media (max-width: 960px) {
    .login-wrap { grid-template-columns: 1fr; }
    .login-brand { display: none; }
    .login-main {
        min-height: 100dvh;
        padding: max(24px, env(safe-area-inset-top)) 16px max(24px, env(safe-area-inset-bottom));
    }
    .login-panel__logo { display: inline-flex; }
}

@media (min-width: 961px) {
    /* En escritorio el logo grande vive en la marca; la tarjeta usa título directo */
    .login-panel__logo { display: none; }
    .login-panel__head { padding-top: clamp(34px, 4vw, 44px); }
}

@media (max-width: 400px) {
    .login-panel { border-radius: 18px; }
    .login-panel__head h1 { font-size: 1.4rem; }
    .login-panel__body { padding-left: 20px; padding-right: 20px; }
    .login-panel__head { padding-left: 20px; padding-right: 20px; }
    .login-panel__foot { padding-left: 20px; padding-right: 20px; }
}

/* ═══════════════ Modo oscuro automático ═══════════════ */
@media (prefers-color-scheme: dark) {
    :root {
        --lg-bg: #0a1416;
        --lg-surface: #10201f;
        --lg-text: #e9f5f3;
        --lg-muted: #8ba5a3;
        --lg-border: #274240;
        --lg-border-soft: #1c302f;
        --lg-input-bg: #0d1b1a;
        --lg-input-disabled-bg: #172725;
        --lg-label: #cfe2df;
        --lg-placeholder: #6b8582;
        --lg-ring: rgba(45, 212, 191, 0.22);
        --lg-shadow-card: 0 30px 70px rgba(0, 0, 0, 0.55), 0 10px 24px rgba(0, 0, 0, 0.4);
    }

    .login-panel { border-color: var(--lg-border); }

    .login-lock-notice {
        color: #fcd34d;
        background: rgba(245, 158, 11, 0.12);
        border-color: rgba(245, 158, 11, 0.4);
    }
}

@media (prefers-reduced-motion: reduce) {
    .btn-login__spinner { animation: none; }
    .btn-login::after { display: none; }
    .login-brand__wave path,
    .login-panel,
    .login-brand__logo,
    .login-brand__hero,
    .login-brand__features { animation: none; }
}