:root {
    --brand-900: #002a5c;
    --brand-800: #003778;
    --brand-700: #004e9e;
    --brand-600: #005bb5;
    --brand-500: #3b82f6;
    --brand-50: #eff6ff;
    --slate-900: #0f172a;
    --slate-800: #1e293b;
    --slate-700: #334155;
    --slate-600: #475569;
    --slate-500: #64748b;
    --slate-400: #94a3b8;
    --slate-300: #cbd5e1;
    --slate-200: #e2e8f0;
    --slate-100: #f1f5f9;
    --slate-50: #f8fafc;
    --white: #ffffff;
    --red-600: #dc2626;
    --green-600: #16a34a;
    --green-50: #f0fdf4;
    --green-200: #bbf7d0;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    min-height: 100%;
    font-family: 'Figtree', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--slate-800);
    background-color: var(--slate-50);
}

/* ===== Layout principal ===== */
.login-page {
    display: flex;
    min-height: 100vh;
    opacity: 0;
    animation: login-page-in 0.6s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

/* ===== Panel izquierdo (marca) ===== */
.login-brand {
    position: relative;
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    overflow: hidden;
    background: linear-gradient(135deg, var(--brand-900), var(--brand-800), var(--brand-700), var(--brand-800));
    background-size: 400% 400%;
    animation: gradient-shift 18s ease infinite;
}

.login-brand::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.06) 0%, transparent 35%);
    pointer-events: none;
}

.login-brand::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 35%;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.15), transparent);
    pointer-events: none;
}

.login-brand-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 420px;
    opacity: 0;
    animation: brand-content-in 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.2s forwards;
}

.login-brand-logo {
    width: 100%;
    max-width: 200px;
    height: auto;
    margin-bottom: 1.25rem;
    filter: drop-shadow(0 4px 24px rgba(0, 0, 0, 0.3));
}

.login-brand-title {
    color: var(--white);
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    line-height: 1.35;
    margin: 0;
    opacity: 0.95;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
}

/* ===== Panel derecho (formulario) ===== */
.login-form-section {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background-color: var(--slate-50);
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: var(--white);
    border-radius: 1.25rem;
    border: 1px solid var(--slate-200);
    box-shadow:
        0 4px 6px -1px rgba(15, 23, 42, 0.05),
        0 20px 60px -15px rgba(15, 23, 42, 0.12);
    padding: 2.5rem;
    opacity: 0;
    transform: translateY(24px);
    animation: card-in 0.75s cubic-bezier(0.22, 1, 0.36, 1) 0.15s forwards;
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
    opacity: 0;
    animation: stagger-in 0.55s cubic-bezier(0.22, 1, 0.36, 1) 0.3s forwards;
}

.login-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--slate-900);
    margin: 0 0 0.375rem;
}

.login-header p {
    font-size: 0.9375rem;
    color: var(--slate-500);
    margin: 0;
}

/* ===== Formulario ===== */
.login-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.login-field {
    opacity: 0;
    animation: stagger-in 0.55s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.login-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--slate-700);
    margin-bottom: 0.5rem;
}

.login-input-wrap {
    position: relative;
}

.login-input-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 1.25rem;
    height: 1.25rem;
    color: var(--slate-400);
    pointer-events: none;
    transition: color 0.2s ease;
}

.login-input {
    width: 100%;
    height: 3rem;
    padding: 0 1rem 0 2.75rem;
    font-size: 0.9375rem;
    color: var(--slate-800);
    background: var(--white);
    border: 1px solid var(--slate-300);
    border-radius: 0.75rem;
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
    outline: none;
}

.login-input::placeholder {
    color: var(--slate-400);
}

.login-input:hover {
    border-color: var(--slate-400);
}

.login-input:focus {
    border-color: var(--brand-500);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.12);
    transform: translateY(-1px);
}

.login-input-wrap:focus-within .login-input-icon {
    color: var(--brand-600);
}

.login-error {
    display: flex;
    align-items: flex-start;
    gap: 0.375rem;
    margin-top: 0.5rem;
    font-size: 0.8125rem;
    color: var(--red-600);
}

.login-error svg {
    width: 1rem;
    height: 1rem;
    flex-shrink: 0;
    margin-top: 0.0625rem;
}

/* ===== Remember me (oculto) ===== */
.login-remember {
    display: none;
}

/* ===== Estado de sesión ===== */
.login-status {
    padding: 0.875rem;
    border-radius: 0.75rem;
    border: 1px solid var(--green-200);
    background-color: var(--green-50);
    color: var(--green-600);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    opacity: 0;
    animation: stagger-in 0.55s cubic-bezier(0.22, 1, 0.36, 1) 0.34s forwards;
}

.login-status svg {
    width: 1rem;
    height: 1rem;
    flex-shrink: 0;
    margin-top: 0.125rem;
}

/* ===== Botón ===== */
.login-submit {
    width: 100%;
    height: 3rem;
    margin-top: 0.5rem;
    padding: 0 1.5rem;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--white);
    background: linear-gradient(135deg, var(--brand-600), var(--brand-700));
    border: none;
    border-radius: 0.75rem;
    cursor: pointer;
    box-shadow: 0 4px 14px rgba(0, 91, 181, 0.28);
    transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
    outline: none;
}

.login-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 91, 181, 0.35);
    filter: brightness(1.05);
}

.login-submit:active {
    transform: translateY(0);
}

.login-submit:focus-visible {
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25), 0 4px 14px rgba(0, 91, 181, 0.28);
}

/* ===== Footer de tarjeta ===== */
.login-footer {
    text-align: center;
    margin-top: 1.75rem;
    font-size: 0.8125rem;
    color: var(--slate-400);
    opacity: 0;
    animation: stagger-in 0.55s cubic-bezier(0.22, 1, 0.36, 1) 0.74s forwards;
}

/* ===== Marca móvil ===== */
.login-mobile-brand {
    display: none;
}

/* ===== Animaciones ===== */
@keyframes login-page-in {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes gradient-shift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

@keyframes brand-content-in {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes card-in {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes stagger-in {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
    .login-page {
        flex-direction: column;
    }

    .login-brand {
        display: none;
    }

    .login-mobile-brand {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        padding: 2rem 1.5rem 1.5rem;
        background: linear-gradient(135deg, var(--brand-900), var(--brand-800));
        animation: gradient-shift 18s ease infinite;
        background-size: 400% 400%;
    }

    .login-mobile-brand-logo {
        width: 100%;
        max-width: 140px;
        height: auto;
        margin-bottom: 0.75rem;
        filter: drop-shadow(0 4px 20px rgba(0, 0, 0, 0.25));
    }

    .login-mobile-brand-title {
        color: var(--white);
        font-size: 0.9375rem;
        font-weight: 600;
        text-align: center;
        margin: 0;
        line-height: 1.35;
        text-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
    }

    .login-form-section {
        align-items: flex-start;
        padding: 1.5rem;
    }

    .login-card {
        padding: 1.75rem;
        border-radius: 1rem;
        box-shadow:
            0 4px 6px -1px rgba(15, 23, 42, 0.05),
            0 16px 48px -12px rgba(15, 23, 42, 0.1);
    }

    .login-header {
        margin-bottom: 1.75rem;
    }
}

@media (max-width: 400px) {
    .login-card {
        padding: 1.5rem;
        border-radius: 0.875rem;
    }

    .login-form-section {
        padding: 1rem;
    }

    .login-mobile-brand {
        padding: 1.5rem 1rem 1rem;
    }
}