/* ============================================================
   LOGIN PAGE - Estilos BEM + Flexbox + Grid + Animaciones
   Requisitos cubiertos: BEM, Flexbox, Grid, transiciones,
   animaciones, transformaciones, clip-path, responsive
   ============================================================ */

/* === Variables (Guía de Estilos) === */
:root {
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-primary-light: #818cf8;
    --color-accent: #06b6d4;
    --color-bg-dark: #0f172a;
    --color-bg-card: #1e293b;
    --color-text-primary: #f8fafc;
    --color-text-secondary: #94a3b8;
    --color-text-dark: #1e293b;
    --color-input-bg: #f1f5f9;
    --color-input-border: #cbd5e1;
    --color-input-focus: #6366f1;
    --color-error: #ef4444;
    --color-success: #10b981;
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-card: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-input: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-button: 0 4px 14px rgba(99, 102, 241, 0.4);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* === BLOQUE: login-page === */
.login-page {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    font-family: var(--font-family);
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow-x: hidden; /* Solo ocultar el desbordamiento horizontal, no el vertical */
    position: relative;
}

/* Fondo animado con clip-path */
.login-page__background {
    position: fixed;
    inset: 0;
    z-index: 0;
    overflow: hidden;
}

.login-page__shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.15;
    animation: floatShape 20s ease-in-out infinite;
}

.login-page__shape--1 {
    width: 600px;
    height: 600px;
    background: var(--color-primary);
    top: -200px;
    right: -100px;
    clip-path: polygon(50% 0%, 80% 10%, 100% 35%, 100% 70%, 80% 90%, 50% 100%, 20% 90%, 0% 70%, 0% 35%, 20% 10%);
    animation-delay: 0s;
    animation-duration: 25s;
}

.login-page__shape--2 {
    width: 500px;
    height: 500px;
    background: var(--color-accent);
    bottom: -150px;
    left: -100px;
    clip-path: polygon(25% 0%, 75% 0%, 100% 50%, 75% 100%, 25% 100%, 0% 50%);
    animation-delay: -5s;
    animation-duration: 20s;
}

.login-page__shape--3 {
    width: 400px;
    height: 400px;
    background: var(--color-primary-light);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
    animation-delay: -10s;
    animation-duration: 30s;
}

/* Animación de las formas flotantes */
@keyframes floatShape {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg) scale(1);
    }
    25% {
        transform: translate(30px, -50px) rotate(5deg) scale(1.05);
    }
    50% {
        transform: translate(-20px, 20px) rotate(-5deg) scale(0.95);
    }
    75% {
        transform: translate(40px, 30px) rotate(3deg) scale(1.02);
    }
}

/* Contenedor principal con CSS Grid */
.login-page__container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    max-width: 900px;
    width: 90%;
    min-height: 550px;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    animation: slideUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    opacity: 0;
}

/* Animación de entrada del contenedor */
@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px) scale(0.96);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* === BLOQUE: login-branding (panel izquierdo) === */
.login-branding {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    padding: 3rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

/* Efecto decorativo con clip-path en el branding */
.login-branding::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.05);
    clip-path: circle(60% at 80% 20%);
    pointer-events: none;
}

.login-branding::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -30%;
    width: 80%;
    height: 80%;
    background: rgba(255, 255, 255, 0.03);
    clip-path: circle(50% at 30% 70%);
    pointer-events: none;
}

.login-branding__content {
    position: relative;
    z-index: 1;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.login-branding__logo {
    text-align: center;
    margin-bottom: 1.5rem;
    animation: fadeInLeft 0.6s ease 0.3s backwards;
}

.login-branding__logo-img {
    max-width: 80px;
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    filter: drop-shadow(0 8px 20px rgba(0, 0, 0, 0.3));
    transition: transform var(--transition-normal);
}

.login-branding__logo-img:hover {
    transform: scale(1.08) rotate(-2deg);
}

.login-branding__title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin: 0 0 0.5rem 0;
    letter-spacing: -0.025em;
    animation: fadeInLeft 0.6s ease 0.4s backwards;
}

.login-branding__subtitle {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.8);
    margin: 0 0 2.5rem 0;
    font-weight: 300;
    animation: fadeInLeft 0.6s ease 0.5s backwards;
}

.login-branding__features {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start; /* Alinea los puntos a la izquierda del bloque */
}

.login-branding__feature {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.875rem;
    font-weight: 400;
    animation: fadeInLeft 0.6s ease calc(0.6s + var(--i, 0) * 0.1s) backwards;
}

.login-branding__feature:nth-child(1) { --i: 0; }
.login-branding__feature:nth-child(2) { --i: 1; }
.login-branding__feature:nth-child(3) { --i: 2; }

.login-branding__feature-dot {
    width: 8px;
    height: 8px;
    background: var(--color-accent);
    border-radius: 50%;
    flex-shrink: 0;
    animation: pulse 2s ease-in-out infinite;
}

.login-branding__feature:nth-child(2) .login-branding__feature-dot {
    animation-delay: 0.3s;
}

.login-branding__feature:nth-child(3) .login-branding__feature-dot {
    animation-delay: 0.6s;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.5); opacity: 0.6; }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* === BLOQUE: login-form (panel derecho) === */
.login-form {
    background: #ffffff;
    padding: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-form__wrapper {
    width: 100%;
    max-width: 340px;
}

.login-form__header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-form__avatar {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    animation: bounceIn 0.6s cubic-bezier(0.68, -0.55, 0.27, 1.55) 0.2s backwards;
}

.login-form__avatar svg {
    width: 32px;
    height: 32px;
    color: white;
}

@keyframes bounceIn {
    from {
        opacity: 0;
        transform: scale(0.3);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.login-form__title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-dark);
    margin: 0 0 0.25rem 0;
}

.login-form__description {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin: 0;
}

/* Mensaje de error */
.login-form__error {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: var(--radius-sm);
    margin-bottom: 1.5rem;
    animation: shakeError 0.5s ease;
}

.login-form__error-icon {
    width: 20px;
    height: 20px;
    color: var(--color-error);
    flex-shrink: 0;
}

.login-form__error span {
    font-size: 0.8125rem;
    color: var(--color-error);
    font-weight: 500;
}

@keyframes shakeError {
    0%, 100% { transform: translateX(0); }
    10%, 50%, 90% { transform: translateX(-4px); }
    30%, 70% { transform: translateX(4px); }
}

/* Campos del formulario */
.login-form__body {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.login-form__field {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.login-form__label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text-dark);
    letter-spacing: 0.01em;
}

.login-form__input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.login-form__input-icon {
    position: absolute;
    left: 12px;
    width: 20px;
    height: 20px;
    color: var(--color-text-secondary);
    pointer-events: none;
    transition: color var(--transition-fast);
}

/* Estilizar los inputs que genera Django ({{ form.username }}, {{ form.password }}) */
.login-form__input-wrapper input {
    width: 100%;
    padding: 0.75rem 0.75rem 0.75rem 2.75rem;
    border: 1.5px solid var(--color-input-border);
    border-radius: var(--radius-sm);
    background: var(--color-input-bg);
    font-family: var(--font-family);
    font-size: 0.9375rem;
    color: var(--color-text-dark);
    outline: none;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-input);
}

.login-form__input-wrapper input::placeholder {
    color: var(--color-text-secondary);
}

.login-form__input-wrapper input:hover {
    border-color: var(--color-primary-light);
}

.login-form__input-wrapper input:focus {
    border-color: var(--color-input-focus);
    background: #ffffff;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

.login-form__input-wrapper:focus-within .login-form__input-icon {
    color: var(--color-primary);
}

/* Botón de envío */
.login-form__submit {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.875rem;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font-family);
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-button);
    margin-top: 0.5rem;
    position: relative;
    overflow: hidden;
}

.login-form__submit::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent, rgba(255, 255, 255, 0.1));
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.login-form__submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

.login-form__submit:hover::before {
    opacity: 1;
}

.login-form__submit:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
}

.login-form__submit-icon {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-fast);
}

.login-form__submit:hover .login-form__submit-icon {
    transform: translateX(4px);
}

/* Enlace olvidé contraseña */
.login-form__footer {
    text-align: center;
    margin-top: 0.5rem;
}

.login-form__link {
    font-size: 0.8125rem;
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.login-form__link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1.5px;
    background: var(--color-primary);
    transition: width var(--transition-normal);
}

.login-form__link:hover {
    color: var(--color-primary-dark);
}

.login-form__link:hover::after {
    width: 100%;
}

/* === RESPONSIVE DESIGN === */

/* Tablets */
@media (max-width: 768px) {
    .login-page {
        align-items: flex-start; /* En tablet deja que el contenido fluya desde arriba */
        padding: 2rem 1rem;
    }

    .login-page__container {
        grid-template-columns: 1fr;
        max-width: 440px;
    }

    .login-branding {
        padding: 2rem 2rem 1.5rem;
        text-align: center;
    }

    .login-branding__icon {
        margin: 0 auto 1rem;
    }

    .login-branding__subtitle {
        margin-bottom: 1.5rem;
    }

    .login-branding__features {
        flex-direction: row;
        justify-content: center;
        flex-wrap: wrap;
        gap: 0.75rem;
    }

    .login-branding__feature {
        font-size: 0.75rem;
    }

    .login-form {
        padding: 2rem;
    }
}

/* Móviles pequeños */
@media (max-width: 480px) {
    .login-page {
        align-items: flex-start;
        padding: 1rem;
    }

    .login-page__container {
        width: 100%;
        border-radius: var(--radius-lg);
    }

    .login-branding {
        padding: 1.5rem;
    }

    .login-branding__title {
        font-size: 1.75rem;
    }

    .login-branding__features {
        display: none;
    }

    .login-form {
        padding: 1.5rem;
    }

    .login-form__avatar {
        width: 52px;
        height: 52px;
    }

    .login-form__avatar svg {
        width: 26px;
        height: 26px;
    }
}

/* === Selector de Idioma (Login) === */
.lang-switcher {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    z-index: 10;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: 0.25rem;
    display: flex;
}

.lang-switcher form {
    display: flex;
    gap: 0.25rem;
    margin: 0;
}

.lang-switcher__btn {
    background: transparent;
    border: none;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.4rem 0.8rem;
    border-radius: 16px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.lang-switcher__btn:hover {
    color: white;
    background: rgba(255, 255, 255, 0.1);
}

.lang-switcher__btn--active {
    background: var(--color-primary);
    color: white;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
}