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

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

:root {
    --azul-institucional: #1e40af;
    --celeste-suave: #3b82f6;
    --celeste-claro: #60a5fa;
    --dorado-elegante: #f59e0b;
    --blanco: #ffffff;
    --gris-claro: #f8fafc;
    --gris-medio: #e2e8f0;
    --gris-fondo: #f1f5f9;
    --texto-oscuro: #1e293b;
    --texto-medio: #475569;
    --sombra-suave: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --sombra-media: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --sombra-fuerte: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    min-height: 100vh;
    background: var(--gris-fondo);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    position: relative;
}

/* Contenedor principal más ancho */
.login-container {
    width: 100%;
    max-width: 500px;
    background: var(--blanco);
    border-radius: 20px;
    box-shadow: var(--sombra-fuerte);
    padding: 60px 50px;
    position: relative;
    border: 1px solid var(--gris-medio);
    animation: slideUp 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Línea decorativa superior más prominente */
.login-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--celeste-suave), var(--dorado-elegante));
    border-radius: 20px 20px 0 0;
}

/* Header con logo */
.login-header {
    text-align: center;
    margin-bottom: 45px;
}

/* Logo más pequeño y elegante */
.logo-container {
    display: flex;
    justify-content: center;
    margin-bottom: 25px;
}

.logo {
    height: 60px;
    width: auto;
    box-shadow: var(--sombra-media);
    background: var(--blanco);
    padding: 8px;
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

.login-header h2 {
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--celeste-suave);
    margin-bottom: 10px;
    letter-spacing: 0.5px;
}

.instituto-name {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--azul-institucional);
    margin-bottom: 15px;
    line-height: 1.1;
    position: relative;
}

.subtitulo {
    color: var(--texto-medio);
    font-size: 0.9rem;
    font-weight: 400;
    line-height: 1.4;
    max-width: 300px;
    margin: 0 auto 20px auto;
}

/* Sección especial para Día del Estudiante */
.dia-estudiante {
    background: linear-gradient(135deg, var(--celeste-suave), var(--dorado-elegante));
    color: var(--blanco);
    padding: 12px 20px;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    box-shadow: var(--sombra-media);
    margin: 0 auto;
    display: inline-block;
}

/* Mensajes de error */
p[style*="color:red"] {
    background: linear-gradient(135deg, #fef2f2, #fee2e2);
    color: #dc2626 !important;
    padding: 18px 24px;
    border-radius: 15px;
    margin: 25px 0;
    text-align: center;
    font-weight: 500;
    font-size: 0.9rem;
    border: 1px solid #fecaca;
    border-left: 4px solid #dc2626;
    box-shadow: var(--sombra-suave);
}

/* Formulario más espacioso */
form {
    margin-top: 35px;
}

/* Labels */
label {
    display: block;
    color: var(--texto-oscuro);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 10px;
    margin-top: 25px;
    letter-spacing: 0.025em;
}

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

/* Inputs más grandes y espaciosos */
input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 18px 24px;
    border: 2px solid var(--gris-medio);
    border-radius: 15px;
    font-size: 1.05rem;
    font-family: inherit;
    background: var(--gris-claro);
    color: var(--texto-oscuro);
    transition: all 0.2s ease;
    outline: none;
    margin-bottom: 6px;
}

input[type="text"]:hover,
input[type="password"]:hover {
    border-color: var(--celeste-claro);
    background: var(--blanco);
}

input[type="text"]:focus,
input[type="password"]:focus {
    border-color: var(--celeste-suave);
    background: var(--blanco);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

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

/* Botón más prominente */
button[type="submit"] {
    width: 100%;
    padding: 18px 30px;
    margin-top: 35px;
    background: var(--celeste-suave);
    color: var(--blanco);
    border: none;
    border-radius: 15px;
    font-size: 1.1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: var(--sombra-media);
    letter-spacing: 0.5px;
}

button[type="submit"]:hover {
    background: var(--azul-institucional);
    transform: translateY(-2px);
    box-shadow: var(--sombra-fuerte);
}

button[type="submit"]:active {
    transform: translateY(0);
    box-shadow: var(--sombra-media);
}

/* Footer */
.login-footer {
    text-align: center;
    margin-top: 35px;
    padding-top: 25px;
    border-top: 1px solid var(--gris-medio);
}

.login-footer a {
    color: var(--celeste-suave);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: color 0.2s ease;
}

.login-footer a:hover {
    color: var(--azul-institucional);
    text-decoration: underline;
}

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

/* Tablet grande (1024px+) */
@media (min-width: 1024px) {
    .login-container {
        max-width: 550px;
        padding: 70px 60px;
    }
    
    .instituto-name {
        font-size: 2.5rem;
    }
    
    input[type="text"],
    input[type="password"] {
        padding: 20px 26px;
        font-size: 1.1rem;
    }
    
    button[type="submit"] {
        padding: 20px 32px;
        font-size: 1.15rem;
    }
}

/* Tablet (768px - 1023px) */
@media (max-width: 1023px) and (min-width: 768px) {
    .login-container {
        max-width: 480px;
        padding: 55px 45px;
        border-radius: 18px;
    }
    
    .logo {
        height: 55px;
        width: auto;
    }
    
    .instituto-name {
        font-size: 2rem;
    }
    
    .login-header h2 {
        font-size: 1.15rem;
    }
    
    input[type="text"],
    input[type="password"] {
        padding: 16px 20px;
        font-size: 1rem;
    }
    
    button[type="submit"] {
        padding: 16px 26px;
        font-size: 1.05rem;
    }
}

/* Mobile grande (480px - 767px) */
@media (max-width: 767px) and (min-width: 480px) {
    body {
        padding: 15px;
    }
    
    .login-container {
        max-width: 400px;
        padding: 45px 35px;
        border-radius: 16px;
    }
    
    .logo {
        height: 50px;
        width: auto;
    }
    
    .instituto-name {
        font-size: 1.8rem;
    }
    
    .login-header h2 {
        font-size: 1.1rem;
    }
    
    input[type="text"],
    input[type="password"] {
        padding: 15px 18px;
        font-size: 0.95rem;
    }
    
    button[type="submit"] {
        padding: 15px 22px;
        font-size: 1rem;
    }
    
    label {
        font-size: 0.85rem;
    }
    
    .subtitulo {
        font-size: 0.85rem;
    }
}

/* Mobile pequeño (hasta 479px) */
@media (max-width: 479px) {
    body {
        padding: 10px;
    }
    
    .login-container {
        max-width: 100%;
        padding: 35px 25px;
        border-radius: 14px;
    }
    
    .logo {
        height: 45px;
        width: auto;
    }
    
    .instituto-name {
        font-size: 1.6rem;
        line-height: 1.2;
    }
    
    .login-header h2 {
        font-size: 1rem;
    }
    
    input[type="text"],
    input[type="password"] {
        padding: 14px 16px;
        font-size: 0.9rem;
        border-radius: 12px;
    }
    
    button[type="submit"] {
        padding: 14px 20px;
        font-size: 0.95rem;
        border-radius: 12px;
    }
    
    label {
        font-size: 0.8rem;
        margin-top: 20px;
    }
    
    .subtitulo {
        font-size: 0.8rem;
        max-width: 100%;
    }
    
    p[style*="color:red"] {
        padding: 15px 18px;
        font-size: 0.85rem;
    }
}

/* Mobile muy pequeño (hasta 320px) */
@media (max-width: 320px) {
    .login-container {
        padding: 30px 20px;
    }
    
    .instituto-name {
        font-size: 1.4rem;
    }
    
    .logo {
        width: 50px;
        height: 50px;
    }
}

/* Orientación landscape en móviles */
@media (max-height: 500px) and (orientation: landscape) {
    body {
        padding: 10px;
    }
    
    .login-container {
        padding: 25px 30px;
        margin: 10px 0;
    }
    
    .login-header {
        margin-bottom: 25px;
    }
    
    .logo {
        width: 50px;
        height: 50px;
    }
    
    .instituto-name {
        font-size: 1.5rem;
        margin-bottom: 10px;
    }
    
    form {
        margin-top: 20px;
    }
    
    label {
        margin-top: 15px;
    }
    
    button[type="submit"] {
        margin-top: 20px;
    }
    
    .login-footer {
        margin-top: 20px;
        padding-top: 15px;
    }
}

/* Estados adicionales */
button[type="submit"]:disabled {
    background: var(--gris-medio);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Mejoras de accesibilidad */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus visible para accesibilidad */
input[type="text"]:focus-visible,
input[type="password"]:focus-visible,
button[type="submit"]:focus-visible,
.login-footer a:focus-visible {
    outline: 2px solid var(--celeste-suave);
    outline-offset: 2px;
}