/* =================== Reset y Variables CSS (tema sobrio/corporativo) =================== */
:root {
    --primary-gradient: linear-gradient(135deg, #0f172a 0%, #111827 100%);
    --secondary-gradient: linear-gradient(135deg, #374151, #1f2937);
    --accent-color: #070707;
    --text-primary: #e5e7eb;
    --text-secondary: #cbd5e1;
    --text-light: #94a3b8;
    --bg-glass: rgba(255, 255, 255, 0.12);
    --bg-glass-dark: rgba(255, 255, 255, 0.08);
    --shadow-neomorphic: 0 8px 32px rgba(15, 23, 42, 0.45);
    --shadow-soft: 0 4px 16px rgba(0, 0, 0, 0.18);
    --border-radius: 16px;
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    min-height: 100vh;
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex; align-items: center; justify-content: center;
    position: relative; overflow: hidden;
    background: var(--primary-gradient);
    font-weight: 400; line-height: 1.6;
}

/* =================== BACKGROUND =================== */
.background-layer {
    position: absolute; inset: 0; z-index: 1;
    /* PNG + degradado translúcido arriba (la PNG llega desde base2.html en --bg-image) */
    background-image:
        linear-gradient(135deg, rgba(15, 23, 42, 0.46), rgba(17, 24, 39, 0.47)),
        var(--bg-image, none);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

/* Compatibilidad con contenedores previos */
.bg-image-container { position: absolute; inset: 0; }
.bg-image {
    position: absolute; inset: 0;
    background-size: cover; background-position: center;
    background-repeat: no-repeat; background-attachment: fixed;
    filter: brightness(0.6) saturate(1.05);
}
.bg-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(15,23,42,.5), rgba(17,24,39,.5));
    mix-blend-mode: multiply; opacity: 1;
}
.bg-image:empty { background: var(--primary-gradient); }

/* Overlay decorativo sutil (no tapa la imagen) */
.bg-image-overlay {
    position: absolute; inset: 0;
    background:
      radial-gradient(1000px 600px at 20% 15%, rgba(255,255,255,.04), transparent 60%),
      radial-gradient(800px 500px at 80% 25%, rgba(255,255,255,.03), transparent 60%);
    opacity: 1;
}

/* Partículas */
.bg-particles { position: absolute; inset: 0; overflow: hidden; }
.particle {
    position: absolute;
    background: radial-gradient(circle, rgba(138,160,178,0.28) 0%, rgba(138,160,178,0.1) 70%, transparent 100%);
    border-radius: 50%;
    backdrop-filter: blur(5px);
    animation: float 20s infinite linear;
    box-shadow: inset 0 0 15px rgba(138,160,178,0.15), 0 0 20px rgba(138,160,178,0.08);
}
.particle:nth-child(1) { width: 20px; height: 20px; left: 10%; animation-delay: 0s;  animation-duration: 25s; }
.particle:nth-child(2) { width: 15px; height: 15px; left: 20%; animation-delay: 2s;  animation-duration: 20s; }
.particle:nth-child(3) { width: 25px; height: 25px; left: 30%; animation-delay: 4s;  animation-duration: 30s; }
.particle:nth-child(4) { width: 18px; height: 18px; left: 40%; animation-delay: 6s;  animation-duration: 22s; }
.particle:nth-child(5) { width: 12px; height: 12px; left: 50%; animation-delay: 8s;  animation-duration: 18s; }
.particle:nth-child(6) { width: 22px; height: 22px; left: 60%; animation-delay: 10s; animation-duration: 26s; }
.particle:nth-child(7) { width: 16px; height: 16px; left: 70%; animation-delay: 12s; animation-duration: 24s; }
.particle:nth-child(8) { width: 28px; height: 28px; left: 80%; animation-delay: 14s; animation-duration: 28s; }
.particle:nth-child(9) { width: 14px; height: 14px; left: 90%; animation-delay: 16s; animation-duration: 32s; }
.particle:nth-child(10){ width: 24px; height: 24px; left: 5%;  animation-delay: 18s; animation-duration: 27s; }

@keyframes float {
    0%   { transform: translateY(100vh) rotate(0deg);   opacity: 0; }
    10%  { opacity: 1; }
    90%  { opacity: 1; }
    100% { transform: translateY(-100vh) rotate(360deg); opacity: 0; }
}

/* Figuras flotantes */
.floating-elements { position: absolute; inset: 0; pointer-events: none; }
.floating-shape {
    position: absolute;
    background: rgba(138,160,178,0.06);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(138,160,178,0.18);
    box-shadow: inset 0 0 30px rgba(138,160,178,0.08);
}
.shape-1 { width: 200px; height: 200px; border-radius: 50%; top: 10%; left:-5%; animation: float-shape 40s infinite ease-in-out; }
.shape-2 { width: 150px; height: 150px; border-radius: 30%; top: 60%; right:-5%; animation: float-shape 35s infinite ease-in-out reverse; }
.shape-3 { width: 100px; height: 300px; border-radius: 50px; top: 30%; left: 5%; animation: float-shape 45s infinite ease-in-out; animation-delay: -10s; }
.shape-4 { width: 80px;  height: 80px;  border-radius: 20px; top: 20%; right:20%; animation: float-shape 30s infinite ease-in-out; animation-delay: -20s; }

@keyframes float-shape {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    33%      { transform: translateY(-30px) rotate(120deg); }
    66%      { transform: translateY(20px)  rotate(240deg); }
}

/* =================== SETTINGS =================== */
.settings-icon {
    position: absolute; top: 30px; right: 30px; width: 50px; height: 50px;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    cursor: pointer; transition: var(--transition);
    z-index: 1000; box-shadow: var(--shadow-neomorphic);
}
.settings-icon i { font-size: 20px; color: rgba(255,255,255,.85); transition: var(--transition); }
.settings-icon:hover { background: rgba(255,255,255,0.2); transform: rotate(90deg) scale(1.06); box-shadow: 0 12px 40px rgba(15,23,42,0.6); }
.settings-icon:hover i { color: #fff; }

.settings-panel {
    position: fixed; top: 0; right: 0; width: 300px; height: 100vh;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border-left: 1px solid rgba(255, 255, 255, 0.2);
    z-index: 1001; transform: translateX(100%);
    animation: slide-in-right 0.4s ease-out forwards;
}
.settings-content { padding: 2rem; color: rgba(255,255,255,0.9); }
.settings-content h3 { margin-bottom: 2rem; font-size: 1.5rem; font-weight: 600; }
.setting-item { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }

.toggle-switch {
    width: 50px; height: 25px; background: rgba(255,255,255,0.2);
    border-radius: 25px; cursor: pointer; position: relative; transition: var(--transition);
}
.toggle-slider {
    width: 21px; height: 21px; background: white; border-radius: 50%;
    position: absolute; top: 2px; left: 2px; transition: var(--transition); box-shadow: var(--shadow-soft);
}
.toggle-switch.active { background: var(--accent-color); }
.toggle-switch.active .toggle-slider { transform: translateX(25px); }

.close-settings {
    width: 100%; padding: 12px; background: var(--secondary-gradient);
    color: white; border: none; border-radius: var(--border-radius);
    cursor: pointer; font-weight: 600; transition: var(--transition); margin-top: 2rem;
}
.close-settings:hover { transform: translateY(-2px); box-shadow: var(--shadow-soft); }

@keyframes slide-in-right { to { transform: translateX(0); } }

/* =================== CARD LOGIN =================== */
.login-container {
    position: relative; width: 100%; max-width: 450px; z-index: 10;
    animation: slide-up 0.8s ease-out; margin: 2rem;
}
.glass-background {
    position: absolute; inset: 0;
    background: var(--bg-glass);
    backdrop-filter: blur(25px) saturate(1.2);
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: var(--shadow-neomorphic), inset 0 1px 0 rgba(255,255,255,0.08);
}
.neomorphic-border {
    position: absolute; top: -2px; left: -2px; width: calc(100% + 4px); height: calc(100% + 4px);
    background: linear-gradient(135deg, rgba(138,160,178,0.25), rgba(255,255,255,0.06));
    border-radius: 26px; z-index: -1; opacity: .85;
}
.container-content { position: relative; padding: 3rem 2.5rem; z-index: 2; }

@keyframes slide-up { from { opacity:0; transform: translateY(50px); } to { opacity:1; transform: translateY(0); } }

/* =================== LOGO/TÍTULO =================== */
.logo-section { text-align: center; margin-bottom: 2.2rem; }
.logo { display: inline-flex; align-items: center; gap: 14px; margin-bottom: 1rem; }

.logo-icon {
    width: 55px; height: 55px;
    background: rgba(255,255,255,.06);
    border-radius: 18px; display:flex; align-items:center; justify-content:center;
    box-shadow: 0 8px 32px rgba(0,0,0,0.35), inset 0 1px 0 rgba(255,255,255,0.08);
    position: relative; overflow: hidden;
    border: 1px solid rgba(255,255,255,0.12);
}
.logo-icon::before { display: none; } /* fuera el “shine” */
.logo-icon i { font-size: 24px; color: var(--accent-color); filter: drop-shadow(0 2px 4px rgba(0,0,0,0.25)); }

/* Título SIN colores ni degradados */
.logo-text {
    font-size: 26px; font-weight: 700;
    color: var(--text-primary);
    letter-spacing: .2px;
    text-shadow: none;
    background: none;
    -webkit-text-fill-color: currentColor;
}
.logo-subtitle {
    color: rgba(255,255,255,0.85);
    font-size: 14px; font-weight: 400; margin-top: .5rem;
    text-shadow: none; letter-spacing: .2px;
}

/* =================== FORM =================== */
.form-container { position: relative; }
.form-group, .p-2 { margin-bottom: 2rem; position: relative; }
.enhanced-input-wrapper { position: relative; margin-bottom: 1rem; }

.floating-label {
    position: absolute; top: -8px; left: 16px;
    background: rgba(17,24,39,0.65); backdrop-filter: blur(10px);
    color: var(--text-secondary); font-size: 12px; font-weight: 600;
    padding: 0 8px; border-radius: 8px; transition: var(--transition); z-index: 3;
    border: 1px solid rgba(255,255,255,0.12);
}

.enhanced-input, .form-control {
    width: 100%; padding: 18px 24px 18px 60px;
    border: 2px solid rgba(255,255,255,0.16);
    border-radius: var(--border-radius);
    font-size: 16px; font-weight: 500;
    background: rgba(255,255,255,0.08);
    backdrop-filter: blur(10px);
    color: rgba(255,255,255,0.95);
    outline: none; transition: var(--transition); position: relative; z-index: 2;
}
.enhanced-input::placeholder, .form-control::placeholder { color: rgba(255,255,255,0.5); }

.enhanced-input:focus, .form-control:focus {
    border-color: var(--accent-color);
    background: rgba(255,255,255,0.1);
    box-shadow: 0 0 0 4px rgba(138,160,178,0.18), 0 8px 32px rgba(138,160,178,0.25);
    transform: translateY(-2px);
}
.enhanced-input-wrapper.focused { transform: scale(1.02); }
.enhanced-input-wrapper.focused .floating-label {
    color: var(--accent-color);
    background: rgba(138,160,178,0.12);
    border-color: var(--accent-color);
    box-shadow: 0 0 10px rgba(138,160,178,0.28);
}
.enhanced-input-wrapper.valid .enhanced-input { border-color: #488fbb; }
.enhanced-input-wrapper.invalid .enhanced-input { border-color: #f56565; }
.enhanced-input-wrapper.valid .floating-label { color: #4898bb; border-color: #48b7bb; }
.enhanced-input-wrapper.invalid .floating-label { color: #f56565; border-color: #f56565; }

/* Icons (Font Awesome) */
.input-icon {
    position: absolute; left: 20px; top: 50%; transform: translateY(-50%);
    color: rgb(7, 11, 18); transition: var(--transition); z-index: 3;
    width: 20px; height: 20px; display:flex; align-items:center; justify-content:center;

}
.input-icon i { font-size: 18px; line-height: 1; }
.input-icon svg { display:none; } /* si quedaran SVGs antiguos, se ocultan */

.enhanced-input-wrapper.focused .input-icon,
.form-control:focus ~ .input-icon {
    color: var(--accent-color);
    transform: translateY(-50%) scale(1.08);
}

/* Toggle de password (FA) */
.password-toggle {
    position: absolute; right: 20px; top: 50%; transform: translateY(-50%);
    color: rgba(255,255,255,0.7); cursor: pointer; transition: var(--transition); z-index: 3;
    width: 20px; height: 20px; display:flex; align-items:center; justify-content:center;
}
.password-toggle i { font-size: 18px; line-height: 1; }
.password-toggle svg { display:none; }
.password-toggle:hover { color: var(--accent-color); transform: translateY(-50%) scale(1.08); }

/* Subrayado animado */
/*
.input-underline {
    position: absolute; bottom: 0; left: 0; height: 3px; width: 0;
    background: var(--secondary-gradient);
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 2px; z-index: 1;
}
.enhanced-input-wrapper.focused .input-underline, .form-control:focus ~ .input-underline { width: 100%; }
*/
/* =================== BOTONES =================== */
.btn {
    width: 100%; padding: 18px 24px;
    background: var(--secondary-gradient); color: white; border: none;
    border-radius: var(--border-radius); font-size: 16px; font-weight: 600;
    cursor: pointer; transition: var(--transition); position: relative; overflow: hidden;
    display: flex; align-items: center; justify-content: center; gap: 10px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.35), inset 0 1px 0 rgba(255,255,255,0.08);
    backdrop-filter: blur(10px); border: 1px solid rgba(255,255,255,0.08);
}
.btn::before {
    content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.16), transparent);
    transition: left 0.5s;
}
.btn:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(0,0,0,0.45), 0 0 20px rgba(138,160,178,0.25); }
.btn:hover::before { left: 100%; }
.btn:active { transform: translateY(-1px); }
.btn:disabled { opacity: 0.7; cursor: not-allowed; transform: none; }

.btn-dark {
    background: linear-gradient(135deg, #4b5563, #1f2937);
    box-shadow: 0 8px 32px rgba(31,41,55,0.45);
}
.btn-dark:hover { box-shadow: 0 12px 40px rgba(31,41,55,0.55); }
.btn-block { width: 100%; display: block; }

/* =================== ALERTAS =================== */
.alert {
    padding: 16px 20px; border-radius: var(--border-radius);
    margin-bottom: 1.5rem; font-weight: 500; animation: slide-down 0.4s ease-out;
    backdrop-filter: blur(10px); border: 1px solid rgba(255,255,255,0.16);
}
.alert-danger { background: rgba(245,101,101,0.18); color: #ffe2e2; border-color: rgba(245,101,101,0.28); }
.invalid-feedback { color: #ffe2e2; font-size: 12px; margin-top: 0.5rem; font-weight: 500; }

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

/* =================== UTILIDADES =================== */
.text-center { text-align: center; }
.text-white  { color: rgba(255, 255, 255, 0.92) !important; text-shadow: 0 1px 2px rgba(0,0,0,0.1); }
.text-info   { color: var(--accent-color) !important; text-decoration: none; font-weight: 600; transition: var(--transition); }
.text-info:hover { color: rgba(255,255,255,0.95) !important; text-shadow: 0 0 10px rgba(138,160,178,0.35); }

.mb-4 { margin-bottom: 2rem !important; }
.pt-4 { padding-top: 2rem !important; }
.w-100 { width: 100% !important; }

/* Titulares */
h2 {
    font-size: 2rem; font-weight: 700; margin-bottom: 2rem;
    color: var(--text-primary); text-shadow: none; background: none; -webkit-text-fill-color: currentColor;
}

/* =================== DECORATIVOS =================== */
.decorative-dots { position: absolute; bottom: 20px; right: 20px; display: flex; gap: 8px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: rgba(255,255,255,0.3); animation: pulse 2s infinite; }
.dot:nth-child(2) { animation-delay: .5s; }
.dot:nth-child(3) { animation-delay: 1s; }
@keyframes pulse { 0%,100%{ opacity:.3; transform: scale(1);} 50%{ opacity:1; transform: scale(1.2);} }

/* =================== DARK MODE =================== */
.dark-mode {
    --primary-gradient: linear-gradient(135deg, #0b1220 0%, #111827 100%);
    --bg-glass: rgba(0, 0, 0, 0.25);
    --bg-glass-dark: rgba(0, 0, 0, 0.4);
    --text-primary: #f7fafc;
    --text-secondary: #e2e8f0;
    --text-light: #cbd5e0;
}
.dark-mode .enhanced-input, .dark-mode .form-control {
    background: rgba(0,0,0,0.22); color: rgba(255,255,255,0.95);
    border-color: rgba(255,255,255,0.12);
}
.dark-mode .floating-label {
    background: rgba(0,0,0,0.8); color: var(--text-secondary);
}

/* =================== REDUCED MOTION =================== */
.reduced-motion * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
}

/* =================== RESPONSIVE =================== */
@media (max-width: 640px) {
    .login-container { margin: 1rem; max-width: none; }
    .container-content { padding: 2rem 1.5rem; }
    .logo-text { font-size: 24px; }
    .settings-icon { top: 20px; right: 20px; width: 45px; height: 45px; }
    .settings-panel { width: 280px; }
    .floating-shape { display: none; }
}
@media (max-width: 480px) {
    .container-content { padding: 1.5rem 1rem; }
    .enhanced-input, .form-control { padding: 16px 20px 16px 50px; font-size: 15px; }
    .input-icon { left: 15px; width: 18px; height: 18px; }
    .password-toggle { right: 15px; width: 18px; height: 18px; }
    .btn { padding: 16px 20px; font-size: 15px; }
    h2 { font-size: 1.6rem; }
    .logo-text { font-size: 22px; }
}

/* =================== HIGH CONTRAST =================== */
@media (prefers-contrast: high) {
    :root { --bg-glass: rgba(255, 255, 255, 0.25); --bg-glass-dark: rgba(255, 255, 255, 0.2); }
    .enhanced-input, .form-control { border-width: 3px; }
    .btn { border: 2px solid rgba(255,255,255,0.28); }
}

/* =================== PRINT =================== */
@media print {
    .bg-particles, .floating-elements, .settings-icon, .decorative-dots { display: none; }
    .login-container { box-shadow: none; background: white; }
    .glass-background { background: white; backdrop-filter: none; }
}