/* ── Color Palette ─────────────────────────────────────────────── */
:root {
    /* NIN Brand */
    --nin-navy: #1B3A5C;
    --nin-green: #8DC63F;
    --nin-green-glow: rgba(141, 198, 63, 0.15);

    /* Light Mode */
    --bg-main-light: #F4F6FA;
    --bg-sidebar-light: #FFFFFF;
    --text-primary-light: #0F172A;
    --text-secondary-light: #64748B;
    --border-color-light: #E2E8F0;
    --chat-user-bg-light: #EFF6FF;
    --chat-bot-bg-light: #FFFFFF;
    --accent-color-light: #1B3A5C;
    --accent-glow-light: rgba(27, 58, 92, 0.12);
    --input-bg-light: #FFFFFF;
    --card-shadow-light: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);

    /* Dark Mode */
    --bg-main-dark: #0B0F1A;
    --bg-sidebar-dark: #111827;
    --text-primary-dark: #F1F5F9;
    --text-secondary-dark: #94A3B8;
    --border-color-dark: rgba(255, 255, 255, 0.06);
    --chat-user-bg-dark: rgba(141, 198, 63, 0.08);
    --chat-bot-bg-dark: rgba(255, 255, 255, 0.03);
    --accent-color-dark: #8DC63F;
    --accent-glow-dark: rgba(141, 198, 63, 0.12);
    --input-bg-dark: #1A1F2E;
    --card-shadow-dark: 0 4px 16px rgba(0, 0, 0, 0.3);

    /* Active Theme (Light default) */
    --bg-main: var(--bg-main-light);
    --bg-sidebar: var(--bg-sidebar-light);
    --text-primary: var(--text-primary-light);
    --text-secondary: var(--text-secondary-light);
    --border-color: var(--border-color-light);
    --chat-user-bg: var(--chat-user-bg-light);
    --chat-bot-bg: var(--chat-bot-bg-light);
    --accent-color: var(--accent-color-light);
    --accent-glow: var(--accent-glow-light);
    --input-bg: var(--input-bg-light);
    --card-shadow: var(--card-shadow-light);
}

body.dark-theme {
    --bg-main: var(--bg-main-dark);
    --bg-sidebar: var(--bg-sidebar-dark);
    --text-primary: var(--text-primary-dark);
    --text-secondary: var(--text-secondary-dark);
    --border-color: var(--border-color-dark);
    --chat-user-bg: var(--chat-user-bg-dark);
    --chat-bot-bg: var(--chat-bot-bg-dark);
    --accent-color: var(--accent-color-dark);
    --accent-glow: var(--accent-glow-dark);
    --input-bg: var(--input-bg-dark);
    --card-shadow: var(--card-shadow-dark);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-primary);
    transition: background-color 0.4s ease, color 0.4s ease;
    height: 100vh;
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
}

/* ── Layout ────────────────────────────────────────────────────── */
.layout {
    display: flex;
    height: 100vh;
}

/* ── Sidebar ───────────────────────────────────────────────────── */
.sidebar {
    width: 300px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    transition: all 0.4s ease;
    overflow-y: auto;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding-bottom: 0.5rem;
}

.sidebar-logo {
    width: 40px;
    height: 40px;
    max-width: 40px;
    max-height: 40px;
    object-fit: contain;
    border-radius: 8px;
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.sidebar-logo:hover {
    transform: scale(1.08);
}

.sidebar-brand {
    display: flex;
    flex-direction: column;
}

.brand-name {
    font-weight: 700;
    font-size: 1rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.brand-sub {
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.sidebar-divider {
    height: 1px;
    background: var(--border-color);
    margin: 0.25rem 0;
}

.sidebar-spacer {
    flex: 1;
}

/* Form Groups */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    display: flex;
    align-items: center;
    gap: 6px;
}

.form-group label i {
    font-size: 1rem;
    color: var(--accent-color);
}

/* Select */
.select-wrapper {
    position: relative;
}

select {
    width: 100%;
    appearance: none;
    background: var(--input-bg);
    color: var(--text-primary);
    padding: 0.7rem 2.5rem 0.7rem 0.9rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-family: inherit;
    font-size: 0.85rem;
    cursor: pointer;
    outline: none;
    transition: border-color 0.3s, box-shadow 0.3s;
}

select:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.select-icon {
    position: absolute;
    right: 0.9rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
    font-size: 0.9rem;
}

/* Upload Zone */
.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 1.5rem 1rem;
    text-align: center;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    background: rgba(0, 0, 0, 0.02);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

body.dark-theme .upload-zone {
    background: rgba(255, 255, 255, 0.02);
}

.upload-zone:hover {
    border-color: var(--accent-color);
    background: var(--accent-glow);
}

.upload-zone i {
    font-size: 2rem;
    color: var(--nin-green);
    margin-bottom: 0.2rem;
}

.upload-zone p {
    font-size: 0.78rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.upload-buttons {
    display: flex;
    gap: 8px;
    margin-top: 8px;
}

.upload-btn {
    background: var(--bg-sidebar);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
    font-weight: 500;
}

.upload-btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    transform: translateY(-1px);
}

.export-excel-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: #1D6F42;
    /* Excel green */
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    margin-top: 10px;
    margin-bottom: 15px;
    transition: all 0.2s;
    box-shadow: 0 2px 5px rgba(29, 111, 66, 0.3);
}

.export-excel-btn:hover {
    background: #155331;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(29, 111, 66, 0.4);
}

/* Tablas generadas por markdown */
.message table {
    width: 100%;
    border-collapse: collapse;
    margin: 10px 0;
    font-size: 0.9rem;
    background: var(--bg-sidebar);
    border-radius: 8px;
    overflow: hidden;
}

.message th,
.message td {
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    text-align: left;
}

.message th {
    background: rgba(141, 198, 63, 0.1);
    color: var(--nin-green);
    font-weight: 600;
}

.table-wrapper {
    overflow-x: auto;
    margin: 15px 0 4px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.table-wrapper table {
    margin: 0;
    border: none;
}

/* Table controls row (sheet selector + download button) */
.table-controls {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 14px;
    flex-wrap: wrap;
}

.sheet-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.sheet-select {
    background: var(--bg-sidebar);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 5px 10px;
    border-radius: 6px;
    font-size: 0.82rem;
    font-family: inherit;
    cursor: pointer;
}

.sheet-select:focus {
    outline: none;
    border-color: var(--accent-color);
}

.export-all-btn {
    background: var(--nin-navy) !important;
    margin-top: 4px;
    width: 100%;
    justify-content: center;
}

/* File List */
.file-list {
    margin-top: 6px;
    font-size: 0.78rem;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.file-item {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--input-bg);
    padding: 6px 10px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    animation: fadeIn 0.25s ease;
}

.file-item i {
    color: var(--accent-color);
}

.file-item .remove-file {
    margin-left: auto;
    cursor: pointer;
    color: var(--text-secondary);
    transition: color 0.2s;
    background: none;
    border: none;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
}

.file-item .remove-file:hover {
    color: #ef4444;
}

/* Clear Button */
.clear-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.7rem;
    border-radius: 10px;
    font-weight: 500;
    font-family: inherit;
    font-size: 0.85rem;
    transition: all 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
}

.clear-btn:hover {
    background: rgba(239, 68, 68, 0.08);
    border-color: #ef4444;
    color: #ef4444;
    transform: translateY(-1px);
}

/* Sidebar Footer */
.sidebar-footer {
    text-align: center;
    font-size: 0.68rem;
    color: var(--text-secondary);
    opacity: 0.5;
    padding-top: 0.5rem;
}

/* ── Main Content ──────────────────────────────────────────────── */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    min-width: 0;
}

/* Header */
.top-header {
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    background: rgba(244, 246, 250, 0.8);
}

body.dark-theme .top-header {
    background: rgba(11, 15, 26, 0.5);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

/* Theme Toggle */
.theme-toggle {
    background: transparent;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    padding: 0.4rem;
}

.toggle-track {
    width: 52px;
    height: 26px;
    background: var(--input-bg);
    border-radius: 30px;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 5px;
    position: relative;
    transition: all 0.4s;
}

.sun-icon {
    color: #f59e0b;
    font-size: 13px;
    z-index: 1;
}

.moon-icon {
    color: #6366F1;
    font-size: 13px;
    z-index: 1;
}

.toggle-thumb {
    position: absolute;
    width: 20px;
    height: 20px;
    background: var(--accent-color);
    border-radius: 50%;
    top: 2px;
    left: 3px;
    transition: transform 0.4s cubic-bezier(0.4, 0.0, 0.2, 1);
    z-index: 0;
}

body.dark-theme .toggle-thumb {
    transform: translateX(24px);
    background: var(--nin-green);
}

/* ── Chat Container ────────────────────────────────────────────── */
.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    scroll-behavior: smooth;
}

/* Custom scrollbar */
.chat-container::-webkit-scrollbar {
    width: 6px;
}

.chat-container::-webkit-scrollbar-track {
    background: transparent;
}

.chat-container::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.chat-container::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Intro */
.intro-message {
    margin: auto;
    text-align: center;
    color: var(--text-secondary);
    max-width: 500px;
    animation: fadeInUp 0.6s ease;
}

.intro-logo {
    width: 64px;
    height: 64px;
    max-width: 64px;
    max-height: 64px;
    object-fit: contain;
    border-radius: 12px;
    margin-bottom: 1.2rem;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.intro-message h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.6rem;
    letter-spacing: -0.02em;
}

.intro-message p {
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.intro-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 0.55rem 1rem;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.25s ease;
    white-space: nowrap;
}

.chip:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    background: var(--accent-glow);
    transform: translateY(-1px);
}

.chip i {
    font-size: 1rem;
}

/* Messages */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message {
    display: flex;
    flex-direction: column;
    max-width: 78%;
    padding: 1rem 1.25rem;
    border-radius: 14px;
    font-size: 0.92rem;
    line-height: 1.65;
    animation: fadeIn 0.3s ease;
}

.user-msg {
    align-self: flex-end;
    background: var(--chat-user-bg);
    border: 1px solid var(--border-color);
    border-bottom-right-radius: 4px;
}

.assistant-msg {
    align-self: flex-start;
    background: var(--chat-bot-bg);
    border: 1px solid var(--border-color);
    border-bottom-left-radius: 4px;
}

.assistant-msg p {
    margin-bottom: 8px;
}

.assistant-msg p:last-child {
    margin-bottom: 0;
}

.assistant-msg ul,
.assistant-msg ol {
    margin: 8px 0;
    padding-left: 1.5em;
}

.assistant-msg pre {
    background: var(--input-bg);
    padding: 12px;
    border-radius: 10px;
    overflow-x: auto;
    border: 1px solid var(--border-color);
    margin: 8px 0;
}

.assistant-msg code {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.82rem;
}

.assistant-msg table {
    border-collapse: collapse;
    width: 100%;
    margin: 8px 0;
    font-size: 0.85rem;
}

.assistant-msg th,
.assistant-msg td {
    border: 1px solid var(--border-color);
    padding: 6px 10px;
    text-align: left;
}

.assistant-msg th {
    background: var(--input-bg);
    font-weight: 600;
}

.assistant-msg strong {
    color: var(--accent-color);
}

/* Loading */
.loading {
    align-self: flex-start;
    color: var(--text-secondary);
    font-style: italic;
    display: flex;
    gap: 10px;
    align-items: center;
    font-size: 0.88rem;
    animation: fadeIn 0.3s ease;
}

.loader {
    width: 14px;
    height: 14px;
    border: 2px solid var(--text-secondary);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    100% {
        transform: rotate(360deg);
    }
}

/* ── Input Container ───────────────────────────────────────────── */
.input-container {
    padding: 0 2rem 1.25rem 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.input-wrapper {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 0.5rem 0.75rem 0.5rem 1rem;
    display: flex;
    align-items: flex-end;
    gap: 8px;
    box-shadow: var(--card-shadow);
    transition: all 0.3s ease;
}

.input-wrapper:focus-within {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

textarea {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    resize: none;
    padding: 0.6rem 0;
    outline: none;
    height: 44px;
    max-height: 150px;
    overflow-y: auto;
    line-height: 1.5;
}

textarea::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

.send-btn {
    background: var(--accent-color);
    color: white;
    border: none;
    width: 38px;
    height: 38px;
    min-width: 38px;
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px var(--accent-glow);
}

body.light-theme .send-btn {
    color: white;
}

.send-btn:hover {
    transform: scale(1.06);
}

.send-btn:active {
    transform: scale(0.96);
}

.send-btn:disabled {
    background: var(--border-color);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.input-hint {
    font-size: 0.7rem;
    color: var(--text-secondary);
    opacity: 0.5;
}

/* ── SSO Login Screen ──────────────────────────────────────────── */
.login-screen {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, #0B0F1A 0%, #1B3A5C 50%, #0B0F1A 100%);
    background-size: 400% 400%;
    animation: gradientShift 12s ease infinite;
}

@keyframes gradientShift {
    0%   { background-position: 0% 50%; }
    50%  { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Patrón de puntos decorativo */
.login-screen::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(141, 198, 63, 0.08) 1px, transparent 1px);
    background-size: 32px 32px;
    pointer-events: none;
}

.login-card {
    position: relative;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    padding: 3rem 2.5rem;
    width: 100%;
    max-width: 400px;
    text-align: center;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.4),
                0 0 0 1px rgba(141, 198, 63, 0.1);
    animation: cardAppear 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes cardAppear {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.96);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.login-logo {
    width: 72px;
    height: 72px;
    object-fit: contain;
    border-radius: 16px;
    margin: 0 auto 1.25rem;
    display: block;
    filter: drop-shadow(0 4px 12px rgba(141, 198, 63, 0.3));
}

.login-title {
    font-family: 'Inter', sans-serif;
    font-size: 1.75rem;
    font-weight: 700;
    color: #F1F5F9;
    letter-spacing: -0.03em;
    margin-bottom: 0.5rem;
}

.login-subtitle {
    font-size: 0.9rem;
    color: rgba(241, 245, 249, 0.55);
    line-height: 1.5;
    margin-bottom: 2rem;
}

.sso-login-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 14px 24px;
    background: #FFFFFF;
    color: #1B1B1B;
    border: none;
    border-radius: 12px;
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s ease;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.sso-login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    background: #F8F8F8;
}

.sso-login-btn:active {
    transform: translateY(0);
}

.sso-login-btn:disabled {
    opacity: 0.7;
    cursor: wait;
    transform: none;
}

.sso-spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(27, 27, 27, 0.2);
    border-top-color: #1B3A5C;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

.login-domain-hint {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-top: 1.5rem;
    font-size: 0.75rem;
    color: rgba(241, 245, 249, 0.35);
    letter-spacing: 0.01em;
}

.login-domain-hint i {
    font-size: 0.9rem;
    color: rgba(141, 198, 63, 0.6);
}

/* ── Header Right (User Info + Logout) ─────────────────────────── */
.header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    background: var(--accent-glow);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 0.78rem;
    color: var(--text-secondary);
    font-weight: 500;
    max-width: 240px;
    overflow: hidden;
}

.user-info i {
    font-size: 1.1rem;
    color: var(--accent-color);
    flex-shrink: 0;
}

.user-info span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.logout-btn {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-secondary);
    width: 32px;
    height: 32px;
    min-width: 32px;
    border-radius: 8px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.05rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.logout-btn:hover {
    background: rgba(239, 68, 68, 0.08);
    border-color: rgba(239, 68, 68, 0.3);
    color: #ef4444;
}

.header-divider {
    width: 1px;
    height: 20px;
    background: var(--border-color);
    margin: 0 4px;
}

/* ── Responsive ────────────────────────────────────────────────── */
@media (max-width: 768px) {
    .sidebar {
        display: none;
    }

    .chat-container {
        padding: 1rem;
    }

    .input-container {
        padding: 0 1rem 1rem;
    }

    .top-header {
        padding: 1rem;
    }

    .message {
        max-width: 92%;
    }

    .login-card {
        margin: 1rem;
        padding: 2rem 1.5rem;
    }

    .user-info span {
        max-width: 120px;
    }

    .header-right {
        gap: 4px;
    }
}