@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');

/* =========================
    VARIABLES
========================= */

:root {
    --color-primario:   #00695c;
    --color-secundario: #4db6ac;
    --color-texto:      #37474f;
    --color-blanco:     #ffffff;
    --sombra-suave:     0 10px 30px rgba(0, 0, 0, 0.10);
    --sombra-hover:     0 15px 35px rgba(0, 105, 92, 0.20);
    --borde-radio:      16px;
    --transicion:       all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* =========================
    RESET
========================= */

html {
    overflow-x: hidden;
}

* {
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent; /* Quita el flash azul en móviles */
    -webkit-text-size-adjust: 100%;           /* Evita que el navegador cambie el tamaño del texto al girar el cel */
    box-sizing: border-box;                   /* Evita problemas con el padding y el tamaño */
    user-select: none;                        /* Evita que el usuario seleccione el texto */
    -webkit-user-select: none;                /* Safari y Chrome móvil */
    -webkit-touch-callout: none;              /* Evita el menú de "Copiar" en iOS */
}

/* =========================
    ANIMACIONES
========================= */

@keyframes entradaSuave {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}

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

/* =========================
    BODY — fondo animado
========================= */

body {
    background: linear-gradient(-45deg, #e0f7fa, #80deea, #b2dfdb, #e0f2f1);
    background-size: 400% 400%;
    animation: gradienteVivo 15s ease infinite;
    font-family: 'Poppins', sans-serif;
    color: var(--color-texto);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    overflow-x: hidden;
}

/* =========================
    CAJA DE LOGIN
========================= */

.login-box {
    width: 100%;
    max-width: 440px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--borde-radio);
    box-shadow: var(--sombra-suave);
    border: 1px solid rgba(255, 255, 255, 0.60);
    padding: 40px 36px;
    animation: entradaSuave 0.8s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

/* =========================
    TÍTULO H1
========================= */

h1 {
    text-align: center;
    color: var(--color-primario);
    font-size: 1.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 28px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.05);
    position: relative;
    padding-bottom: 14px;
}

h1::after {
    content: '';
    display: block;
    width: 70px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primario), var(--color-secundario));
    border-radius: 2px;
    margin: 10px auto 0;
}

/* =========================
    MENSAJES
========================= */

.mensaje {
    padding: 13px 16px;
    border-radius: 12px;
    margin-bottom: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    animation: entradaSuave 0.5s ease forwards;
}

.mensaje.error {
    background: linear-gradient(135deg, #ffebee, #ffcdd2);
    color: #c62828;
    border-left: 4px solid #e53935;
}

.mensaje.info {
    background: linear-gradient(135deg, #e3f2fd, #bbdefb);
    color: #1565c0;
    border-left: 4px solid #1e88e5;
}

/* =========================
    LABELS
========================= */

label {
    display: block;
    margin-bottom: 6px;
    margin-top: 14px;
    font-weight: 500;
    color: var(--color-primario);
    font-size: 0.95rem;
}

label:first-of-type {
    margin-top: 0;
}

/* =========================
    INPUTS
========================= */

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0f2f1;
    border-radius: 12px;
    font-family: 'Poppins', sans-serif;
    font-size: 0.95rem;
    color: var(--color-texto);
    background-color: #f9fbe7;
    transition: var(--transicion);
    outline: none;
    margin-bottom: 4px;
}

input[type="text"]:hover,
input[type="password"]:hover {
    border-color: #b2dfdb;
    background-color: #ffffff;
}

input[type="text"]:focus,
input[type="password"]:focus {
    border-color: var(--color-secundario);
    background-color: var(--color-blanco);
    box-shadow: 0 0 0 4px rgba(77, 182, 172, 0.15);
    transform: scale(1.01);
}

/* =========================
    BOTÓN INGRESAR
========================= */

button[type="submit"] {
    width: 100%;
    margin-top: 22px;
    padding: 13px 22px;
    border: none;
    border-radius: 30px;
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    z-index: 1;
    transition: var(--transicion);
    background: linear-gradient(45deg, var(--color-primario), #26a69a);
    color: white;
    box-shadow: 0 5px 15px rgba(0, 105, 92, 0.30);
    letter-spacing: 0.5px;
}

button[type="submit"]::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.22), transparent);
    transition: 0.5s;
    z-index: -1;
}

button[type="submit"]:hover::before {
    left: 100%;
}

button[type="submit"]:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 25px rgba(0, 105, 92, 0.35);
}

button[type="submit"]:active {
    transform: translateY(1px) scale(0.98);
}

/* =========================
    BOTÓN INICIO (pie)
========================= */

.boton-inicio-wrap {
    display: flex;
    justify-content: center;
    margin: 24px 0 0 0;
}

.boton-inicio-link {
    text-decoration: none;
    display: inline-block;
}

.boton-inicio-svg {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    padding: 10px 26px 10px 16px;
    border-radius: 999px;
    background: linear-gradient(45deg, var(--color-primario), #26a69a);
    color: #ffffff;
    font-family: 'Poppins', sans-serif;
    font-size: 1.05rem;
    font-weight: 700;
    line-height: 1;
    box-shadow: 0 8px 18px rgba(0, 105, 92, 0.30);
    transition: var(--transicion);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.boton-inicio-svg::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.22), transparent);
    transition: 0.5s;
    z-index: -1;
}

.boton-inicio-svg:hover::before {
    left: 100%;
}

.boton-inicio-svg:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 12px 28px rgba(0, 105, 92, 0.35);
}

.boton-inicio-svg:active {
    transform: translateY(1px) scale(0.98);
}

.boton-inicio-icono {
    width: 50px;
    height: 50px;
    min-width: 50px;
    min-height: 50px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.18);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    overflow: hidden;
    transition: transform 0.4s ease, background 0.4s ease;
}

.boton-inicio-svg:hover .boton-inicio-icono {
    transform: rotate(-15deg);
    background: rgba(255, 255, 255, 0.30);
}

.boton-inicio-icono svg {
    display: block;
    width: auto;
    height: 22px;
    max-width: none;
    flex-shrink: 0;
}

.boton-inicio-texto {
    white-space: nowrap;
}

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

.password-wrap input {
    width: 100%;
    padding-right: 48px;
}

.toggle-password {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%) scale(1);
    border: none;
    background: transparent;
    padding: 4px;
    margin: 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #1e88e5;
    transition: transform 0.18s ease, color 0.18s ease, opacity 0.18s ease, filter 0.18s ease;
    -webkit-tap-highlight-color: transparent;
}

.toggle-password:hover {
    color: #1565c0;
}

.toggle-password:focus-visible {
    outline: none;
    color: #0d47a1;
    filter: drop-shadow(0 0 6px rgba(30, 136, 229, 0.25));
}

.toggle-password:active,
.toggle-password.is-visible {
    transform: translateY(-50%) scale(0.92);
    color: #0d47a1;
}

.toggle-password svg {
    width: 22px;
    height: 22px;
    display: block;
}

.toggle-password .eye-closed {
    opacity: 1;
    transition: opacity 0.18s ease;
}

.toggle-password .eye-open {
    opacity: 0;
    transition: opacity 0.18s ease;
}

.toggle-password.is-visible .eye-closed {
    opacity: 0;
}

.toggle-password.is-visible .eye-open {
    opacity: 1;
}

/* =========================
    RESPONSIVE — MÓVIL (≤ 480px)
========================= */

@media (max-width: 480px) {
    body {
        padding: 20px 12px;
    }

    .login-box {
        padding: 28px 20px;
        border-radius: 12px;
    }

    h1 {
        font-size: 1.4rem;
        margin-bottom: 22px;
    }

    h1::after {
        width: 50px;
        height: 3px;
    }

    input[type="text"],
    input[type="password"] {
        font-size: 0.9rem;
        padding: 10px 12px;
    }

    button[type="submit"] {
        font-size: 0.95rem;
        padding: 11px 18px;
    }

    .boton-inicio-svg {
        font-size: 0.95rem;
        padding: 9px 20px 9px 12px;
        gap: 10px;
    }

    .boton-inicio-icono {
        width: 42px;
        height: 42px;
        min-width: 42px;
        min-height: 42px;
    }

    .boton-inicio-icono svg {
        height: 19px;
    }
}

/* =========================
    RESPONSIVE — MUY PEQUEÑO (≤ 360px)
========================= */

@media (max-width: 360px) {
    .login-box {
        padding: 22px 14px;
    }

    h1 {
        font-size: 1.2rem;
    }
}