/* ═══════════════════════════════════════════════════════════════════
   RAG Chatbot Educacional — 4° Medio Chile
   Styles.css — Diseño moderno glassmorphism con paleta institucional
   ═══════════════════════════════════════════════════════════════════ */

/* ─── Variables de diseño ─────────────────────────────────────────── */
:root {
    --color-primary:     #1A3A5C;
    --color-secondary:   #2E86AB;
    --color-accent:      #A23B72;
    --color-success:     #27AE60;
    --color-warning:     #F39C12;
    --color-danger:      #E74C3C;
    --color-bg:          #0B1629;
    --color-bg2:         #0F1F38;
    --color-glass:       rgba(255,255,255,0.05);
    --color-glass-border:rgba(255,255,255,0.12);
    --color-text:        #E8EDF5;
    --color-text-muted:  #8FA3BF;
    --color-text-dim:    #4A6480;
    --color-user-bubble: #2E86AB;
    --color-bot-bubble:  rgba(26,58,92,0.7);
    --radius-sm:         8px;
    --radius-md:         16px;
    --radius-lg:         24px;
    --radius-xl:         32px;
    --shadow-sm:         0 2px 8px rgba(0,0,0,0.3);
    --shadow-md:         0 8px 32px rgba(0,0,0,0.4);
    --shadow-lg:         0 16px 64px rgba(0,0,0,0.5);
    --transition:        0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --font-sans:         'Inter', system-ui, sans-serif;
}

/* ─── Reset & Base ────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    position: relative;
}

/* ─── Fondo animado ───────────────────────────────────────────────── */
.bg-animated {
    position: fixed;
    inset: 0;
    z-index: 0;
    overflow: hidden;
    pointer-events: none;
}

.bg-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.35;
    animation: float 20s ease-in-out infinite;
}
.bg-orb-1 {
    width: 600px; height: 600px;
    background: radial-gradient(circle, #1A3A5C 0%, transparent 70%);
    top: -200px; left: -150px;
    animation-delay: 0s;
}
.bg-orb-2 {
    width: 500px; height: 500px;
    background: radial-gradient(circle, #2E86AB 0%, transparent 70%);
    bottom: -150px; right: -100px;
    animation-delay: -7s;
}
.bg-orb-3 {
    width: 400px; height: 400px;
    background: radial-gradient(circle, #A23B72 0%, transparent 70%);
    top: 40%; left: 50%;
    transform: translateX(-50%);
    animation-delay: -14s;
    opacity: 0.2;
}

@keyframes float {
    0%, 100% { transform: translateY(0) scale(1); }
    33%       { transform: translateY(-30px) scale(1.05); }
    66%       { transform: translateY(20px) scale(0.98); }
}

/* ─── Header ──────────────────────────────────────────────────────── */
.app-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(11, 22, 41, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-glass-border);
    padding: 0 24px;
}

.header-content {
    max-width: 1000px;
    margin: 0 auto;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 14px;
}

.logo-icon {
    font-size: 28px;
    filter: drop-shadow(0 0 12px rgba(46,134,171,0.6));
    animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { filter: drop-shadow(0 0 8px rgba(46,134,171,0.4)); }
    50%       { filter: drop-shadow(0 0 20px rgba(46,134,171,0.8)); }
}

.header-titles { display: flex; flex-direction: column; }

.header-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.header-subtitle {
    font-size: 0.72rem;
    color: var(--color-text-muted);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.header-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    padding: 6px 14px;
    border-radius: 999px;
}

.status-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--color-text-dim);
    transition: var(--transition);
}
.status-dot.online  { background: var(--color-success); box-shadow: 0 0 8px var(--color-success); }
.status-dot.offline { background: var(--color-danger); }
.status-dot.loading { background: var(--color-warning); animation: blink 1s ease infinite; }

@keyframes blink { 0%,100%{opacity:1;} 50%{opacity:0.3;} }

/* ─── Main ────────────────────────────────────────────────────────── */
.app-main {
    flex: 1;
    max-width: 1000px;
    width: 100%;
    margin: 0 auto;
    padding: 24px 24px 0;
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
}

/* ─── Tabs ────────────────────────────────────────────────────────── */
.tabs-nav {
    display: flex;
    gap: 4px;
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-lg);
    padding: 6px;
    margin-bottom: 20px;
}

.tab-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
    border: none;
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--color-text-muted);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.tab-btn:hover {
    background: rgba(46,134,171,0.15);
    color: var(--color-text);
}

.tab-btn.active {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
    box-shadow: 0 4px 16px rgba(46,134,171,0.3);
}

.tab-icon { font-size: 1.1rem; }

/* ─── Tab Panels ──────────────────────────────────────────────────── */
.tab-panel {
    display: none;
    animation: fadeIn 0.3s ease;
    flex: 1;
}
.tab-panel.active { display: flex; flex-direction: column; flex: 1; }

@keyframes fadeIn { from { opacity:0; transform: translateY(8px); } to { opacity:1; transform:none; } }

/* ─── Chat Container ──────────────────────────────────────────────── */
.chat-container {
    display: flex;
    flex-direction: column;
    flex: 1;
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    min-height: 0;
    height: calc(100vh - 200px);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    scroll-behavior: smooth;
}

.chat-messages::-webkit-scrollbar { width: 4px; }
.chat-messages::-webkit-scrollbar-track { background: transparent; }
.chat-messages::-webkit-scrollbar-thumb { background: var(--color-text-dim); border-radius: 2px; }

/* ─── Mensajes ────────────────────────────────────────────────────── */
.message {
    display: flex;
    gap: 12px;
    max-width: 85%;
    animation: messageIn 0.3s ease;
}

@keyframes messageIn {
    from { opacity:0; transform: translateY(12px) scale(0.98); }
    to   { opacity:1; transform: none; }
}

.bot-message  { align-self: flex-start; }
.user-message { align-self: flex-end; flex-direction: row-reverse; }

.message-avatar {
    width: 36px; height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
}

.message-content { display: flex; flex-direction: column; gap: 4px; }

.message-bubble {
    padding: 12px 16px;
    border-radius: var(--radius-md);
    line-height: 1.6;
    font-size: 0.9rem;
}

.bot-message .message-bubble {
    background: var(--color-bot-bubble);
    border: 1px solid var(--color-glass-border);
    border-top-left-radius: 4px;
    color: var(--color-text);
}

.user-message .message-bubble {
    background: linear-gradient(135deg, var(--color-secondary), #1A5276);
    border-top-right-radius: 4px;
    color: white;
}

.message-bubble p { margin-bottom: 8px; }
.message-bubble p:last-child { margin-bottom: 0; }
.message-bubble strong { color: #7FC8E8; }
.user-message .message-bubble strong { color: #BDE3F5; }

.message-time {
    font-size: 0.7rem;
    color: var(--color-text-dim);
    padding: 0 4px;
}
.user-message .message-time { text-align: right; }

/* ─── Fuentes del RAG ─────────────────────────────────────────────── */
.sources-section {
    margin-top: 10px;
    padding: 10px 14px;
    background: rgba(46,134,171,0.1);
    border: 1px solid rgba(46,134,171,0.25);
    border-radius: var(--radius-sm);
}

.sources-title {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-secondary);
    font-weight: 600;
    margin-bottom: 6px;
}

.source-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.78rem;
    color: var(--color-text-muted);
    padding: 2px 0;
}
.source-item::before { content: "📎"; font-size: 0.7rem; }

/* ─── Ejemplos ────────────────────────────────────────────────────── */
.welcome-examples { margin-top: 12px; }
.examples-label {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-bottom: 6px !important;
}

.example-btn {
    display: block;
    width: 100%;
    text-align: left;
    padding: 7px 12px;
    margin-bottom: 5px;
    background: rgba(46,134,171,0.1);
    border: 1px solid rgba(46,134,171,0.2);
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    font-size: 0.82rem;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-sans);
}

.example-btn:hover {
    background: rgba(46,134,171,0.2);
    color: var(--color-text);
    border-color: var(--color-secondary);
    transform: translateX(4px);
}

/* ─── Input de Chat ───────────────────────────────────────────────── */
.chat-input-container {
    padding: 16px;
    border-top: 1px solid var(--color-glass-border);
    background: rgba(11,22,41,0.5);
}

.chat-input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: 10px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-md);
    padding: 10px 12px;
    transition: var(--transition);
}

.chat-input-wrapper:focus-within {
    border-color: var(--color-secondary);
    box-shadow: 0 0 0 3px rgba(46,134,171,0.15);
}

.chat-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    resize: none;
    max-height: 120px;
    line-height: 1.5;
    scrollbar-width: thin;
}

.chat-input::placeholder { color: var(--color-text-dim); }

.send-btn {
    width: 38px; height: 38px;
    border-radius: 50%;
    border: none;
    background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: var(--transition);
    box-shadow: 0 4px 12px rgba(46,134,171,0.4);
}

.send-btn:hover  { transform: scale(1.1); box-shadow: 0 6px 20px rgba(46,134,171,0.6); }
.send-btn:active { transform: scale(0.95); }
.send-btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }
.send-btn svg { width: 16px; height: 16px; }

.input-hint {
    font-size: 0.7rem;
    color: var(--color-text-dim);
    margin-top: 6px;
    text-align: center;
}
.input-hint kbd {
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    border-radius: 4px;
    padding: 1px 5px;
    font-size: 0.65rem;
}

/* ─── Typing Indicator ────────────────────────────────────────────── */
.typing-message .message-bubble {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 14px 18px;
}

.typing-dots { display: flex; gap: 5px; }
.typing-dot {
    width: 7px; height: 7px;
    border-radius: 50%;
    background: var(--color-secondary);
    animation: typing 1.4s ease infinite;
}
.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing {
    0%, 80%, 100% { transform: translateY(0); opacity: 0.4; }
    40%            { transform: translateY(-6px); opacity: 1; }
}

/* ─── Generator Panels ────────────────────────────────────────────── */
.generator-container {
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    flex: 1;
    margin-bottom: 24px;
}

.generator-header { margin-bottom: 28px; }

.generator-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 8px;
}

.generator-desc {
    color: var(--color-text-muted);
    font-size: 0.88rem;
    line-height: 1.5;
}

/* ─── Formularios ─────────────────────────────────────────────────── */
.generator-form { display: flex; flex-direction: column; gap: 20px; }

.form-group { display: flex; flex-direction: column; gap: 8px; }

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-input,
.form-select {
    padding: 12px 16px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition);
    width: 100%;
}

.form-select option { background: var(--color-bg2); }

.form-input::placeholder { color: var(--color-text-dim); }

.form-input:focus,
.form-select:focus {
    border-color: var(--color-secondary);
    box-shadow: 0 0 0 3px rgba(46,134,171,0.15);
}

/* ─── Range Slider ────────────────────────────────────────────────── */
.range-wrapper {
    display: flex;
    align-items: center;
    gap: 14px;
}

.form-range {
    flex: 1;
    -webkit-appearance: none;
    height: 4px;
    background: linear-gradient(to right, var(--color-secondary) 0%, var(--color-secondary) 50%, rgba(255,255,255,0.1) 50%);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}
.form-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px; height: 20px;
    border-radius: 50%;
    background: var(--color-secondary);
    border: 3px solid var(--color-bg);
    box-shadow: 0 0 8px rgba(46,134,171,0.5);
    cursor: pointer;
    transition: var(--transition);
}
.form-range::-webkit-slider-thumb:hover { transform: scale(1.2); }

.range-value {
    min-width: 40px;
    text-align: center;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-secondary);
}

/* ─── Toggle ──────────────────────────────────────────────────────── */
.toggle-wrapper { display: flex; align-items: center; gap: 12px; }

.toggle { position: relative; display: inline-block; width: 48px; height: 26px; cursor: pointer; }

.toggle input { opacity: 0; width: 0; height: 0; }

.toggle-slider {
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,0.1);
    border-radius: 13px;
    transition: var(--transition);
    border: 1px solid var(--color-glass-border);
}
.toggle-slider::before {
    content: '';
    position: absolute;
    width: 18px; height: 18px;
    border-radius: 50%;
    left: 3px; top: 3px;
    background: white;
    transition: var(--transition);
}
.toggle input:checked + .toggle-slider { background: var(--color-secondary); border-color: var(--color-secondary); }
.toggle input:checked + .toggle-slider::before { transform: translateX(22px); }

.toggle-label { font-size: 0.85rem; color: var(--color-text-muted); }

/* ─── Botón principal ─────────────────────────────────────────────── */
.generate-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 32px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(46,134,171,0.35);
    position: relative;
    overflow: hidden;
    margin-top: 8px;
}

.generate-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
    opacity: 0;
    transition: var(--transition);
}
.generate-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(46,134,171,0.5); }
.generate-btn:hover::before { opacity: 1; }
.generate-btn:active { transform: translateY(0); }
.generate-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-icon { font-size: 1.1rem; }

.btn-spinner {
    width: 18px; height: 18px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Resultados ──────────────────────────────────────────────────── */
.result-area,
.error-area {
    margin-top: 20px;
    border-radius: var(--radius-md);
    padding: 18px 20px;
    animation: fadeIn 0.4s ease;
}

.result-area { background: rgba(39,174,96,0.1); border: 1px solid rgba(39,174,96,0.3); }
.error-area  { background: rgba(231,76,60,0.1);  border: 1px solid rgba(231,76,60,0.3); }

.result-success {
    display: flex;
    align-items: center;
    gap: 16px;
}

.result-icon { font-size: 1.8rem; flex-shrink: 0; }
.error-icon  { font-size: 1.5rem; display: inline; margin-right: 8px; }

.result-info { flex: 1; }
.result-title { font-weight: 600; color: var(--color-success); font-size: 0.95rem; }
.result-subtitle { font-size: 0.82rem; color: var(--color-text-muted); margin-top: 2px; }

.error-msg { display: inline; font-size: 0.88rem; color: #FF7675; }

.download-btn {
    padding: 10px 20px;
    background: var(--color-success);
    color: white;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    white-space: nowrap;
    transition: var(--transition);
    flex-shrink: 0;
}
.download-btn:hover { background: #2ECC71; transform: scale(1.03); }

.hidden { display: none !important; }

/* ─── Footer ──────────────────────────────────────────────────────── */
.app-footer {
    text-align: center;
    padding: 16px 24px;
    font-size: 0.72rem;
    color: var(--color-text-dim);
    position: relative;
    z-index: 1;
    border-top: 1px solid var(--color-glass-border);
    margin-top: 16px;
}

/* ─── Responsive ──────────────────────────────────────────────────── */
@media (max-width: 640px) {
    .app-main { padding: 12px 12px 0; }
    .tabs-nav { gap: 2px; padding: 4px; }
    .tab-btn { font-size: 0.75rem; padding: 8px 10px; gap: 5px; }
    .tab-icon { font-size: 1rem; }
    .generator-container { padding: 20px 16px; }
    .form-row { grid-template-columns: 1fr; }
    .chat-container { height: calc(100vh - 220px); }
    .result-success { flex-direction: column; align-items: flex-start; }
    .header-subtitle { display: none; }
}