/* Archivo: style.css */
/* Estilo "Liquid Glass iOS 26" para MagicInvoiceApp - con Theme Switch y animaciones suaves */

/* --- 1. Variables y Reseteo Global --- */
:root {
    --bg-color: #000000;
    --glass-bg: rgba(28, 28, 30, 0.75); /* iOS Dark "Thick" Material */
    --border-color: rgba(255, 255, 255, 0.08);
    --shadow-color: rgba(0, 0, 0, 0.45);
    
    --primary-color: #0a84ff; /* iOS Blue */
    --primary-hover: #359aff;
    --success-color: #30d158; /* iOS Green */
    --error-color: #ff453a;   /* iOS Red */

    --text-primary: #f5f5f7;
    --text-secondary: #aeaeb2;
    --text-placeholder: #636366;
    
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
    --radius-l: 20px;
    --radius-m: 12px;
    --radius-s: 8px;

    /* transitions */
    --ease-fast: cubic-bezier(.2,.9,.3,1);
    --ease-smooth: cubic-bezier(.22,.9,.35,1);
}

/* Light theme variables */
:root[data-theme="light"],
.light-theme {
    --bg-color: #f6f8fb;
    --glass-bg: rgba(255,255,255,0.82);
    --border-color: rgba(0, 0, 0, 0.06);
    --shadow-color: rgba(10, 20, 40, 0.08);
    --text-primary: #0b1220;
    --text-secondary: #4a5568;
    --text-placeholder: #9aa6b2;
    --primary-color: #007aff;
    --primary-hover: #0a84ff;
}

/* Base reset */
html {
    box-sizing: border-box;
    font-size: 10px;
}
*, *:before, *:after {
    box-sizing: inherit;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    background-image: radial-gradient(circle at 20% 20%, rgba(0,122,255,0.06) 0%, rgba(0,0,0,0) 15%),
                      radial-gradient(circle at 80% 70%, rgba(255,59,48,0.03) 0%, rgba(0,0,0,0) 15%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    padding: 1.5rem;
    transition: background-color 450ms var(--ease-smooth), color 400ms var(--ease-smooth);
}

/* --- Container --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2.5rem;
    background: var(--glass-bg);
    border-radius: var(--radius-l);
    border: 1px solid var(--border-color);
    box-shadow: 0 15px 50px var(--shadow-color);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transition: all 350ms var(--ease-smooth);
}

/* header + theme switch placement */
header {
    display: flex;
    /* Ajuste para móviles: permite que los elementos se apilen */
    align-items: flex-start; 
    justify-content: center;
    position: relative;
    margin-bottom: 2rem;
    
    flex-direction: column; /* Por defecto, apilamos verticalmente para móviles */
    text-align: center;
}
header h1 {
    text-align: center;
    font-weight: 700;
    font-size: 2.4rem;
    /* Asegurar que el título ocupe el ancho completo en móvil */
    width: 100%; 
}
header h1 strong {
    color: var(--primary-color);
}

/* Theme switch container top-right */
.theme-switch-container {
    /* Cambiado de absoluto a relativo para seguir el flujo en móvil */
    position: relative; 
    right: auto; 
    top: auto; 
    /* Centrarlo debajo del título */
    margin: 1rem auto 0; 

    display: flex;
    align-items: center;
    gap: 0.4rem;
}

/* iOS-style switch (MEJORA DE DISEÑO IOS 26) */
.theme-switch {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    cursor: pointer;
    user-select: none;
    font-size: 1.0rem;
    color: var(--text-secondary);
    transition: color 250ms var(--ease-fast);
}
.theme-switch input { display: none; }

.switch-track {
    width: 54px;
    height: 32px;
    background: var(--glass-bg);
    border-radius: 999px;
    display: inline-block;
    position: relative;
    border: 1px solid var(--border-color);
    transition: background 300ms var(--ease-smooth), box-shadow 300ms var(--ease-smooth), transform 250ms var(--ease-fast);
    padding: 3px;
    box-sizing: border-box;
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.1);
}

.light-theme .switch-track {
    background: rgba(230, 230, 235, 0.9);
    box-shadow: inset 0 1px 3px rgba(10, 20, 40, 0.1);
}

.theme-switch .switch-thumb {
    width: 26px;
    height: 26px;
    background: #ffffff;
    border-radius: 50%;
    display: block;
    transform: translateX(0);
    transition: transform 300ms var(--ease-smooth), background 300ms var(--ease-smooth), box-shadow 250ms var(--ease-fast);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15), inset 0 0 1px rgba(0,0,0,0.05);
}

/* Checked styles */
.theme-switch input:checked + .switch-track {
    background: var(--primary-color);
    border-color: var(--primary-color);
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.2);
}
.theme-switch input:checked + .switch-track .switch-thumb {
    transform: translateX(22px);
    background: white;
    box-shadow: 0 6px 18px rgba(0,122,255,0.25);
}

/* label text */
.switch-label { font-weight: 600; font-size: 1.1rem; color: var(--text-secondary); }

/* --- Main grid --- */
.main-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}
@media (min-width: 1024px) {
    .main-grid { grid-template-columns: 6fr 4fr; }
}

/* Form panel (Soft UI Glass) */
.form-panel {
    background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(0,0,0,0.04));
    border: 1px solid var(--border-color);
    border-radius: var(--radius-m);
    padding: 2rem;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.1), 0 5px 20px rgba(0,0,0,0.15);
    transition: background 300ms var(--ease-smooth), box-shadow 300ms var(--ease-smooth);
}
.light-theme .form-panel {
    background: linear-gradient(180deg, rgba(255,255,255,0.95), rgba(255,255,255,0.85));
    box-shadow: inset 0 2px 4px rgba(255,255,255,0.5), 0 5px 20px rgba(10,20,40,0.08);
}

.form-panel h2 {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2rem;
    padding-bottom: 0.8rem;
    border-bottom: 1px solid var(--border-color);
}

fieldset { border: none; margin-bottom: 2rem; padding: 0; }
legend {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1.2rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.form-section-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.input-group { display: flex; flex-direction: column; }
.input-group label { font-size: 1.0rem; color: var(--text-secondary); margin-bottom: 0.5rem; font-weight: 600; }

/* inputs (Soft UI/Neumorphic Style) */
input[type="text"], input[type="email"], input[type="tel"], input[type="number"], input[type="date"], input[type="time"], select, textarea {
    width: 100%;
    padding: 1rem 1.2rem;
    background-color: rgba(0,0,0,0.12);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-s);
    color: var(--text-primary);
    font-size: 1.1rem;
    font-family: var(--font-family);
    box-shadow: inset 0 2px 5px rgba(0,0,0,0.2);
    transition: border-color 200ms var(--ease-fast), box-shadow 260ms var(--ease-fast), background 300ms var(--ease-smooth), transform 200ms var(--ease-fast);
    backdrop-filter: blur(6px);
}
.light-theme input[type="text"], .light-theme input[type="email"], .light-theme input[type="tel"], .light-theme input[type="number"], .light-theme input[type="date"], .light-theme input[type="time"], .light-theme select {
    background-color: rgba(245,245,245,0.9);
    box-shadow: inset 0 2px 5px rgba(10,20,40,0.1);
}

input::placeholder, textarea::placeholder { color: var(--text-placeholder); }
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 8px 30px rgba(10,132,255,0.15), inset 0 1px 3px rgba(0,0,0,0.1);
    transform: translateY(-2px);
}
.light-theme input:focus, .light-theme select:focus {
    box-shadow: 0 8px 30px rgba(0,122,255,0.15), inset 0 1px 3px rgba(255,255,255,0.5);
}

/* Buttons (Soft UI/Glass) */
.submit-button {
    width: 100%;
    padding: 1.2rem;
    border: none;
    border-radius: var(--radius-m);
    font-weight: 700;
    font-size: 1.2rem;
    cursor: pointer;
    transition: transform 200ms var(--ease-fast), box-shadow 260ms var(--ease-fast), background 200ms var(--ease-fast);
    background-color: var(--primary-color);
    color: white;
    margin-top: 1.5rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    box-shadow: 0 4px 15px rgba(10,132,255,0.25);
}
.submit-button:hover {
    background-color: var(--primary-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 35px rgba(10,132,255,0.25);
}
.submit-button:active { 
    transform: translateY(-1px); 
    box-shadow: 0 6px 20px rgba(10,132,255,0.25);
}
.submit-button:disabled {
    background-color: var(--text-placeholder);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Botón de descarga */
.download-button {
    background-color: var(--success-color) !important;
    box-shadow: 0 4px 15px rgba(48, 209, 88, 0.3) !important;
    margin-top: 0;
}
.download-button:hover {
    background-color: #4cd964 !important;
    box-shadow: 0 12px 35px rgba(48, 209, 88, 0.4) !important;
}

/* terminal (Minimal Dark Glass) */
.terminal-panel { display: flex; flex-direction: column; min-height: 400px; }
.terminal-container {
    flex-grow: 1;
    background-color: rgba(10,10,12,0.85);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-m);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: inset 0 0 10px rgba(0,0,0,0.2);
    transition: background 300ms var(--ease-smooth);
}
.light-theme .terminal-container { 
    background-color: #f3f6fb; 
    box-shadow: inset 0 0 10px rgba(10,20,40,0.1);
}

.terminal-header {
    background-color: rgba(44,44,46,0.9);
    padding: 0.8rem 1.2rem 0 1.2rem; 
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}
.terminal-header span { color: var(--text-secondary); font-family: monospace; font-size: 1.0rem; line-height: 1.6; }

.terminal-body {
    padding: 10px 1.2rem 1.2rem 1.2rem;
    height: 500px;
    overflow-y: auto;
    font-family: monospace;
    font-size: 1.0rem;
    color: var(--text-secondary);
    word-break: break-word;
    line-height: 1.6;
    transition: color 250ms var(--ease-smooth);
}
.terminal-body > div { margin-bottom: 5px; }
.terminal-body .log-error { color: var(--error-color); font-weight: 700; }
.terminal-body .log-success { color: var(--success-color); font-weight: 700; }

/* Modal (Fluid Animations) */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden;
    transition: opacity 280ms var(--ease-smooth), visibility 0s 280ms linear, backdrop-filter 280ms var(--ease-smooth);
    z-index: 9999;
}
.modal-overlay.show { opacity: 1; visibility: visible; transition: opacity 320ms var(--ease-smooth); }

.modal-content {
    background: var(--glass-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-l);
    box-shadow: 0 15px 60px var(--shadow-color);
    width: 90%; max-width: 520px; padding: 2rem; text-align: center;
    transform: translateY(10px) scale(0.97);
    transition: transform 380ms var(--ease-smooth), opacity 320ms var(--ease-smooth);
    z-index: 10000;
}
.modal-overlay.show .modal-content { transform: translateY(0) scale(1); }

.modal-header .icon { font-size: 3.5rem; line-height: 1; }
.modal-header.success .icon { color: var(--success-color); }
.modal-header.error .icon { color: var(--error-color); }

.modal-title { font-size: 1.8rem; font-weight: 700; color: var(--text-primary); margin: 1.2rem 0; }
.modal-message { font-size: 1.05rem; color: var(--text-secondary); margin-bottom: 1.5rem; line-height: 1.6; word-wrap: break-word; }
.modal-overlay.show .modal-content .modal-message { color: var(--text-primary); }

.modal-close-btn { 
    width: 100%; padding: 1rem; border: none; border-radius: var(--radius-m); 
    font-weight: 700; font-size: 1.1rem; cursor: pointer; 
    background-color: var(--primary-color); color: white;
    box-shadow: 0 4px 15px rgba(10,132,255,0.25);
    transition: background-color 200ms var(--ease-fast), transform 200ms var(--ease-fast), box-shadow 260ms var(--ease-fast);
}
.modal-close-btn:hover { 
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(10,132,255,0.25);
}

.legend-icon { display: inline-block; transition: transform 200ms var(--ease-fast); padding-right: 0.5em; }
legend:hover .legend-icon { transform: scale(1.1); }

.button-icon { display: inline-block; margin-right: 0.5em; transition: transform 200ms var(--ease-fast); }
.submit-button:hover .button-icon { transform: rotate(-8deg) translateY(-2px); }

@media (min-width: 768px) {
    /* Restaurar la disposición original para tablet y desktop */
    header {
        flex-direction: row;
        align-items: center;
    }
    header h1 {
        width: auto;
    }
    .theme-switch-container {
        /* Restaurar la posición absoluta en pantallas grandes */
        position: absolute;
        right: 1.2rem;
        top: -2px;
        margin: 0;
    }
}
@media (max-width: 1100px) {
    header h1 { font-size: 2.0rem; }
}
@media (max-width: 768px) {
    .container { padding: 1.5rem; }
}

/* --- ESCALADO RESPONSIVO --- */
@media (min-width: 1025px) and (max-width: 1399px) { html { font-size: 7.5px; } }
@media (max-width: 1024px) { html { font-size: 10px; } }