/* Variables de color */
:root {
    --bg-page: linear-gradient(180deg, #FFFFFF 0%, #A5C0ED 50%, #2A69CC 100%);
    --text-color: #072635;

    --primary: #2A69CC;
    --primary-dark: #03153E;
    --primary-soft: #E4EAFF;
    --ring: rgba(167, 181, 238, .45);

    --danger: #E53935;
    --danger-bg: #FDECEC;
    --danger-border: #F7C5C5;

    --input-bg: #DDE0EC;
    --placeholder: #8898AA;
    --muted: #7C8798;

    --radius: 16px;
    --radius-sm: 10px;
    --shadow: 0 15px 35px rgba(0, 0, 0, .12);
}

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

html {
    -webkit-text-size-adjust: 100%;
}

body {
    min-height: 100vh;
    min-height: 100dvh;

    display: flex;
    justify-content: center;
    align-items: center;

    padding: 24px 16px;
    padding: max(24px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right))
             max(24px, env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));

    background: var(--bg-page);
    background-attachment: fixed;

    font-family: 'Poppins', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-color);
    -webkit-font-smoothing: antialiased;
}

/* Sección del formulario */
.login-card {
    width: 100%;
    max-width: 460px;          
    background-color: #ffffff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: clamp(22px, 5vw, 36px);

    display: flex;
    flex-direction: column;
    text-align: center;
}

/* Imagen */
.header-image-container {
    width: 100%;
    aspect-ratio: 16 / 9;      
    max-height: 240px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-bottom: clamp(18px, 3.5vw, 28px);
    background-color: #E2E8F0;
}

.header-image-container img {
    box-shadow: var(--shadow);
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* Letra */
.login-title {
    font-size: clamp(20px, 5vw, 26px);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: .5px;
    text-transform: uppercase;
    margin-bottom: 8px;
}

.subtitle {
    font-size: clamp(13px, 3.4vw, 14px);
    color: var(--muted);
    line-height: 1.4;
    margin-bottom: clamp(20px, 4vw, 32px);
}

#error-message {
    display: block;           
    color: var(--danger);
    background-color: var(--danger-bg);
    border: 1px solid var(--danger-border);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    margin-bottom: 16px;
    font-size: 13.5px;
    font-weight: 500;
    line-height: 1.4;
    text-align: center;
}

#error-message:empty {
    display: none;
}

/* Campos de entrada */
.input-group {
    position: relative;
    margin-bottom: 16px;
    text-align: left;
}

input {
    width: 100%;
    padding: 16px 20px;
    font-family: inherit;
    font-size: 16px;           
    font-weight: 500;
    color: var(--text-color);
    background-color: var(--input-bg);
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    outline: none;
    transition: background-color .25s ease, border-color .25s ease, box-shadow .25s ease;
}

#clave {
    padding-right: 56px;      
}

input::placeholder {
    color: var(--placeholder);
    font-weight: 400;
}

input:focus {
    background-color: var(--primary-soft);
    border-color: #A7B5EE;
    box-shadow: 0 0 0 4px var(--ring);
}

/* Mostrar contraseña */
#togglePassword {
    position: absolute;
    top: 50%;
    right: 6px;
    transform: translateY(-50%);

    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;

    background: transparent;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    color: var(--text-color);
    -webkit-tap-highlight-color: transparent;
    transition: color .2s ease, background-color .2s ease;
}

#togglePassword svg {
    fill: currentColor;
    display: block;
    pointer-events: none;
}

#togglePassword:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.hidden {
    display: none !important;
}

/* Boton de Iniciar Sesion */
.btn-login {
    width: 100%;
    margin-top: 8px;
    padding: 17px 18px;

    font-family: inherit;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 1px;
    color: #ffffff;

    background-color: var(--primary);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;

    transition: background-color .25s ease, transform .15s ease, box-shadow .25s ease;
    -webkit-tap-highlight-color: transparent;
}

.btn-login:active {
    transform: translateY(1px);
}

.btn-login:focus-visible {
    outline: 2px solid var(--primary-dark);
    outline-offset: 3px;
}

/* Para dispositivos con punteros*/
@media (hover: hover) and (pointer: fine) {
    #togglePassword:hover {
        color: var(--primary);
        background-color: rgba(42, 105, 204, .10);
    }

    .btn-login:hover {
        background-color: var(--primary-dark);
        transform: translateY(-2px);
        box-shadow: 0 8px 18px rgba(42, 105, 204, .35);
    }
}

/* Accesibilidad */
/* Móviles pequeños */
@media (max-width: 480px) {
    body {
        padding: 16px 12px;
        align-items: flex-start;  
        padding-top: max(28px, env(safe-area-inset-top));
    }

    .login-card {
        border-radius: 14px;
    }

    .header-image-container {
        max-height: 170px;
    }

    .btn-login {
        padding: 16px;
        font-size: 15px;
    }
}

/* Móviles muy bajos (iPhone SE y similares) */
@media (max-width: 380px), (max-height: 620px) {
    .header-image-container {
        max-height: 130px;
        margin-bottom: 16px;
    }

    .subtitle {
        margin-bottom: 18px;
    }
}

/* Pantallas cortas en horizontal (móvil acostado) */
@media (max-height: 560px) and (orientation: landscape) {
    .header-image-container {
        display: none;
    }

    body {
        align-items: center;
    }
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        transition-duration: .01ms !important;
        animation-duration: .01ms !important;
    }
}