*, *::before, *::after { box-sizing: border-box; }
html, body {
    margin: 0; padding: 0; height: 100%;
    font-family: var(--font-family-base);
    color: var(--color-text-secondary);
    -webkit-font-smoothing: antialiased;
}
button { font: inherit; cursor: pointer; }
a { color: inherit; text-decoration: none; }
input { font: inherit; }

.login-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 100vh;
}

/* ======= Lado izquierdo ======= */
.login-brand {
    position: relative;
    background:
        radial-gradient(circle at 20% 10%, rgba(255,255,255,0.10), transparent 55%),
        radial-gradient(circle at 80% 85%, rgba(255,255,255,0.08), transparent 45%),
        linear-gradient(135deg, #0062A9 0%, var(--color-primary) 55%, #1E90FF 100%);
    color: #ffffff;
    padding: var(--space-10) var(--space-8);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    overflow: hidden;
}

.brand-top { display: flex; align-items: center; gap: var(--space-3); }
.brand-logo {
    width: 56px; height: 56px;
    border-radius: var(--radius-lg);
    background: rgba(255,255,255,0.15);
    display: inline-flex; align-items: center; justify-content: center;
    font-weight: var(--font-weight-bold); font-size: 2rem;
    letter-spacing: 0.02em;
}
.brand-name { font-size: var(--font-size-lg); font-weight: var(--font-weight-semibold); letter-spacing: 0.02em; }
.brand-tag { font-size: var(--font-size-xs); color: rgba(255,255,255,0.75); text-transform: uppercase; letter-spacing: var(--letter-spacing-wide); margin-top: 2px; }

.brand-mid h1 {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    line-height: 1.1;
    letter-spacing: -0.01em;
    margin: 0 0 var(--space-4);
    max-width: 420px;
}

.brand-mid p {
    font-size: var(--font-size-md);
    color: rgba(255,255,255,0.85);
    line-height: 1.55;
    max-width: 420px;
    margin: 0;
}

.brand-footer {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--font-size-xs);
    color: rgba(255,255,255,0.70);
}

.brand-footer-dot {
    width: 8px; height: 8px; border-radius: var(--radius-pill);
    background: #4ade80;
}

.brand-decor {
    position: absolute;
    right: -80px; bottom: -120px;
    width: 320px; height: 320px;
    border-radius: var(--radius-pill);
    border: 1px solid rgba(255,255,255,0.12);
}
.brand-decor::after {
    content: "";
    position: absolute;
    inset: 40px;
    border-radius: var(--radius-pill);
    border: 1px solid rgba(255,255,255,0.08);
}

/* ======= Lado derecho ======= */
.login-form-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-8);
    background: var(--color-bg-page);
}

.login-card {
    width: 100%;
    max-width: 400px;
}

.login-card h2 {
    font-size: 1.75rem;
    font-weight: var(--font-weight-semibold);
    color: #0f172a;
    margin: 0 0 var(--space-1);
    letter-spacing: -0.01em;
}

.login-card .subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    margin: 0 0 var(--space-6);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.form-label {
    font-size: var(--font-size-xxs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wide);
    color: var(--color-text-tertiary);
}

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

.input-icon > svg {
    position: absolute;
    left: var(--space-3);
    width: 18px; height: 18px;
    color: var(--color-text-tertiary);
    pointer-events: none;
}

.input-icon > input {
    width: 100%;
    padding: 0.65rem var(--space-3) 0.65rem calc(var(--space-3) + 26px);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    transition: var(--transition-fast);
}

.input-icon > input:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.input-icon > input::placeholder { color: var(--color-text-tertiary); }

.toggle-pw {
    position: absolute;
    right: var(--space-2);
    background: transparent;
    border: none;
    padding: var(--space-2);
    color: var(--color-text-tertiary);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    line-height: 0;
}

.toggle-pw:hover { color: var(--color-text-secondary); background: var(--color-bg-subtle); }
.toggle-pw svg { width: 18px; height: 18px; }

.form-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    margin-bottom: var(--space-5);
    font-size: var(--font-size-sm);
}

.checkbox-row {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
    color: var(--color-text-secondary);
}
.checkbox-row input { accent-color: var(--color-primary); margin: 0; }

.link {
    color: var(--color-primary);
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-fast);
}
.link:hover { color: var(--color-primary-hover); text-decoration: underline; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 0.7rem var(--space-5);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    border: 1px solid transparent;
    transition: var(--transition-fast);
}

.btn-primary {
    background: var(--color-primary);
    color: #ffffff;
    box-shadow: var(--shadow-sm);
}
.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-hover);
    box-shadow: var(--shadow-md);
}

.btn-block { width: 100%; }

.login-error {
    background: var(--color-error-bg);
    color: var(--color-error-text);
    border: 1px solid rgba(185, 28, 28, 0.2);
    border-radius: var(--radius-sm);
    padding: var(--space-3) var(--space-4);
    margin-top: var(--space-4);
    font-size: var(--font-size-sm);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}
.login-error svg { width: 16px; height: 16px; flex-shrink: 0; }

.field-error {
    color: var(--color-error-text);
    font-size: var(--font-size-xs);
    margin-top: var(--space-1);
}

.login-footer {
    text-align: center;
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    margin-top: var(--space-8);
    line-height: 1.6;
}

.demo-users {
    margin-top: var(--space-6);
    padding: var(--space-3) var(--space-4);
    background: var(--color-bg-subtle);
    border: 1px dashed var(--color-border-medium);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xxs);
    color: var(--color-text-tertiary);
    line-height: 1.6;
}
.demo-users strong { color: var(--color-text-secondary); }
.demo-users code {
    font-family: inherit;
    background: var(--color-bg-card);
    padding: 1px 6px;
    border-radius: 4px;
    color: var(--color-text-secondary);
    font-size: 0.72rem;
}

/* ======= Responsive HOT-FIX ======= */

/* Tablet + mobile grande (≤ 860px): stackeo vertical, paneles balanceados. */
@media (max-width: 860px) {
    .login-layout { grid-template-columns: 1fr; }
    .login-brand {
        padding: var(--space-6) var(--space-5);
        min-height: 280px;
    }
    .brand-mid h1 { font-size: 1.75rem; }
    .brand-mid p  { font-size: var(--font-size-sm); }
    .login-form-wrap { padding: var(--space-6) var(--space-5); }
    .brand-decor { width: 220px; height: 220px; right: -60px; bottom: -90px; }
}

/* Mobile chico (≤ 480px): tipografía y espaciados aún más compactos +
   inputs/botones touch-friendly (min-height 44px recomendado WCAG). */
@media (max-width: 480px) {
    html, body { font-size: 14px; }   /* base un punto menor */
    .login-brand {
        padding: var(--space-5) var(--space-4);
        min-height: auto;             /* deja respirar al form de abajo */
    }
    .brand-logo { width: 44px; height: 44px; font-size: 1.5rem; }
    .brand-name { font-size: var(--font-size-md); }
    .brand-tag  { font-size: 0.65rem; }
    .brand-mid h1 { font-size: 1.4rem; margin-top: var(--space-4); }
    .brand-mid p  { font-size: var(--font-size-xs); margin-top: var(--space-2); }
    .brand-bottom { font-size: var(--font-size-xxs); margin-top: var(--space-4); }
    .brand-decor  { display: none; }  /* sin ornamento en mobile chico */

    .login-form-wrap { padding: var(--space-5) var(--space-4); }
    .login-card h2 { font-size: 1.4rem; }
    .login-card .subtitle { font-size: var(--font-size-xs); }

    /* Touch-friendly: 44px de altura mínima en inputs + botones.
       Ajusta padding vertical sin tocar el horizontal de los input-icon. */
    .input-icon input,
    .input-icon select,
    .input-icon textarea {
        min-height: 44px;
        padding-top: 0.85rem;
        padding-bottom: 0.85rem;
    }
    .btn-primary, .btn-block { min-height: 44px; }
    .toggle-pw { min-width: 36px; min-height: 36px; }

    .form-row { flex-direction: column; align-items: flex-start; gap: var(--space-2); }
}