/* ═══════════════════════════════════════════════════
   SPACE LAB — SESIONES EDUCATIVAS
   Sistema de Diseño: Dark Mode + Glassmorphism
   ═══════════════════════════════════════════════════ */

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

:root {
    /* Palette */
    --bg-deep: #06060f;
    --bg-primary: #0c0c1d;
    --bg-secondary: #12122b;
    --bg-elevated: #1a1a3e;
    --bg-card: rgba(18, 18, 43, 0.65);
    --bg-card-hover: rgba(26, 26, 62, 0.8);

    --text-primary: #e8e8f0;
    --text-secondary: #9898b8;
    --text-muted: #5e5e80;
    --text-accent: #00d4ff;

    --accent: #00d4ff;
    --accent-glow: rgba(0, 212, 255, 0.25);
    --accent-dark: #0099bb;
    --accent-2: #8b5cf6;
    --accent-2-glow: rgba(139, 92, 246, 0.25);

    --success: #22c55e;
    --success-bg: rgba(34, 197, 94, 0.15);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.15);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.15);

    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);
    --border-accent: rgba(0, 212, 255, 0.3);

    /* Glass */
    --glass-bg: rgba(12, 12, 29, 0.7);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-blur: 20px;

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;

    /* Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px var(--accent-glow);

    /* Typography */
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Layout */
    --header-h: 64px;
    --sidebar-w: 380px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
    --transition-spring: 300ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    background: var(--bg-deep);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ─── SCROLLBAR ─── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* ─── UTILITY ─── */
.hidden { display: none !important; }
.mobile-only { display: none; }
.no-print { /* print.css will handle */ }

/* ─── SPACE BACKGROUND ─── */
.space-background {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

/* ─── GLASS CARD ─── */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
}

/* ═══════════════════════════════════════
   APP LAYOUT
   ═══════════════════════════════════════ */

.app-wrapper {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ─── HEADER ─── */
.app-header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-lg);
    border-radius: 0;
    border-top: none;
    border-left: none;
    border-right: none;
    border-bottom: 1px solid var(--border);
}

.header-brand {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.brand-icon {
    font-size: 28px;
    animation: float 3s ease-in-out infinite;
    display: flex;
    align-items: center;
    justify-content: center;
}

.brand-logo-img {
    width: 32px;
    height: 32px;
    display: block;
    object-fit: contain;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}

.brand-title {
    font-size: 1.3rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.brand-subtitle {
    display: block;
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--text-muted);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

/* Save Indicator */
.save-indicator {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    background: rgba(255,255,255,0.03);
    font-size: 0.75rem;
    color: var(--text-muted);
    transition: all var(--transition-base);
}

.save-indicator.saved {
    color: var(--success);
    background: var(--success-bg);
}

.save-indicator.saving {
    color: var(--warning);
    background: var(--warning-bg);
}

.save-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--text-muted);
    transition: background var(--transition-base);
}

.save-indicator.saved .save-dot { background: var(--success); }
.save-indicator.saving .save-dot {
    background: var(--warning);
    animation: pulse-dot 1s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

/* ─── MAIN LAYOUT ─── */
.app-main {
    flex: 1;
    display: flex;
    gap: 0;
    height: calc(100vh - var(--header-h));
}

/* ═══════════════════════════════════════
   SIDEBAR
   ═══════════════════════════════════════ */

.sidebar {
    width: var(--sidebar-w);
    min-width: var(--sidebar-w);
    height: 100%;
    overflow-y: auto;
    border-radius: 0;
    border-top: none;
    border-left: none;
    border-bottom: none;
    border-right: 1px solid var(--border);
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* ─── FORM STYLES ─── */
.session-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.form-fieldset {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.form-legend {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
    padding: 0 var(--space-sm);
    letter-spacing: 0.02em;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.form-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.88rem;
    transition: all var(--transition-fast);
    outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
    background: rgba(255, 255, 255, 0.06);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-muted);
}

.form-select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%239898b8' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

.form-select option {
    background: var(--bg-primary);
    color: var(--text-primary);
}

.form-textarea {
    resize: vertical;
    min-height: 60px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

/* ─── FORM ACTIONS ─── */
.form-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.form-actions-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-sm);
}

/* ─── SAVED SESSIONS ─── */
.saved-sessions {
    border-top: 1px solid var(--border);
    padding-top: var(--space-lg);
}

.saved-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

.saved-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.saved-empty {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: center;
    padding: var(--space-lg);
}

.saved-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) var(--space-md);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.saved-item:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
}

.saved-item-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    overflow: hidden;
}

.saved-item-title {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.saved-item-date {
    font-size: 0.7rem;
    color: var(--text-muted);
}

.saved-item-delete {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    opacity: 0.4;
    transition: opacity var(--transition-fast);
    padding: var(--space-xs);
}

.saved-item-delete:hover {
    opacity: 1;
}

/* ═══════════════════════════════════════
   BUTTONS
   ═══════════════════════════════════════ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    outline: none;
    text-decoration: none;
}

.btn:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--border-hover);
    transform: translateY(-1px);
}

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

.btn .icon {
    font-size: 1em;
    line-height: 1;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    border-color: var(--accent);
    color: #000;
    font-weight: 600;
}

.btn-primary:hover {
    box-shadow: var(--shadow-glow);
    transform: translateY(-1px);
}

.btn-accent {
    background: linear-gradient(135deg, var(--accent-2), #6d28d9);
    border-color: var(--accent-2);
    color: #fff;
    font-weight: 600;
}

.btn-accent:hover {
    box-shadow: 0 0 20px var(--accent-2-glow);
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    border-color: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger), #b91c1c);
    border-color: var(--danger);
    color: #fff;
    font-weight: 600;
}

.btn-icon {
    padding: var(--space-sm);
    min-width: 36px;
    min-height: 36px;
}

.btn-full { width: 100%; }
.btn-sm { font-size: 0.78rem; padding: 4px var(--space-sm); }

/* ═══════════════════════════════════════
   PREVIEW AREA
   ═══════════════════════════════════════ */

.preview-area {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-2xl);
    max-width: 440px;
    margin: auto;
    animation: fadeInUp 0.6s ease-out;
}

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

.empty-icon {
    font-size: 4rem;
    margin-bottom: var(--space-lg);
    animation: float 3s ease-in-out infinite;
}

.empty-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.empty-text {
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    font-size: 0.95rem;
}

.empty-steps {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    width: 100%;
    text-align: left;
}

.step-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 0.88rem;
    color: var(--text-secondary);
    transition: all var(--transition-base);
}

.step-item:hover {
    border-color: var(--border-accent);
    background: rgba(0, 212, 255, 0.04);
}

.step-num {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    min-width: 28px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    border-radius: 50%;
    font-size: 0.78rem;
    font-weight: 700;
    color: #000;
}

/* ─── PRINT PREVIEW ─── */
.print-preview {
    width: 100%;
    max-width: 820px;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    animation: fadeInUp 0.4s ease-out;
}

.preview-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) var(--space-md);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

.preview-badge {
    font-size: 0.78rem;
    font-weight: 600;
    padding: 2px var(--space-sm);
    border-radius: var(--radius-full);
    background: var(--success-bg);
    color: var(--success);
    transition: all var(--transition-base);
}

.preview-badge.read-only {
    background: var(--warning-bg);
    color: var(--warning);
}

/* ─── A4 SESSION SHEET ─── */
.session-sheet {
    background: #ffffff;
    color: #1a1a2e;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 24px 28px;
    font-family: 'Inter', Arial, sans-serif;
    font-size: 11px;
    line-height: 1.5;
    min-height: 600px;
    overflow: hidden;
}

/* Session Sheet Table Styles */
.session-sheet .session-header-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 12px;
}

.session-sheet .session-header-table td {
    padding: 4px 8px;
    border: 1px solid #d1d5db;
    vertical-align: middle;
}

.session-sheet .session-header-table .label-cell {
    font-weight: 700;
    background: #f0f4ff;
    color: #1e3a5f;
    white-space: nowrap;
    width: 130px;
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.session-sheet .session-header-table .value-cell {
    font-weight: 400;
    color: #1a1a2e;
    min-width: 120px;
}

.session-sheet .session-header-table .logo-cell {
    width: 70px;
    text-align: center;
    padding: 4px;
}

.session-sheet .session-header-table .logo-cell img {
    max-width: 60px;
    max-height: 60px;
}

.session-sheet .session-title-bar {
    background: linear-gradient(135deg, #1e3a5f, #2563eb);
    color: #fff;
    text-align: center;
    padding: 8px 12px;
    border-radius: 6px;
    margin-bottom: 12px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.session-sheet .section-title {
    background: #e8f0fe;
    color: #1e3a5f;
    font-weight: 700;
    padding: 6px 10px;
    border-radius: 4px;
    margin: 12px 0 6px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-left: 4px solid #2563eb;
}

.session-sheet .content-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 12px;
}

.session-sheet .content-table th {
    background: #f0f4ff;
    color: #1e3a5f;
    font-weight: 700;
    padding: 6px 8px;
    border: 1px solid #d1d5db;
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    text-align: center;
}

.session-sheet .content-table td {
    padding: 6px 8px;
    border: 1px solid #d1d5db;
    vertical-align: top;
    font-size: 11px;
    line-height: 1.5;
}

.session-sheet .content-table tr {
    break-inside: avoid;
}

/* Contenteditable styling */
.session-sheet [contenteditable="true"] {
    outline: none;
    border-radius: 2px;
    transition: background var(--transition-fast);
    min-height: 1.5em;
}

.session-sheet [contenteditable="true"]:hover {
    background: rgba(37, 99, 235, 0.06);
}

.session-sheet [contenteditable="true"]:focus {
    background: rgba(37, 99, 235, 0.1);
    box-shadow: inset 0 0 0 1px rgba(37, 99, 235, 0.3);
}

.session-sheet .moment-label {
    font-weight: 700;
    color: #1e3a5f;
    text-align: center;
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    background: #f0f4ff;
    white-space: nowrap;
    width: 80px;
}

.session-sheet .time-cell {
    text-align: center;
    font-weight: 600;
    width: 60px;
    font-size: 10px;
}

.session-sheet .resources-cell {
    width: 120px;
    font-size: 10px;
}

.session-sheet .eval-table {
    width: 100%;
    border-collapse: collapse;
}

.session-sheet .eval-table th,
.session-sheet .eval-table td {
    padding: 6px 8px;
    border: 1px solid #d1d5db;
    font-size: 10px;
}

.session-sheet .eval-table th {
    background: #f0f4ff;
    color: #1e3a5f;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

/* ═══════════════════════════════════════
   LOAD MODAL
   ═══════════════════════════════════════ */

.load-modal {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(6, 6, 15, 0.8);
    backdrop-filter: blur(8px);
    animation: fadeIn 0.2s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.load-modal-content {
    width: 90%;
    max-width: 500px;
    max-height: 70vh;
    display: flex;
    flex-direction: column;
    padding: var(--space-lg);
    animation: slideUp 0.3s ease-out;
}

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

.load-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-lg);
}

.load-modal-header h3 {
    font-size: 1.1rem;
    font-weight: 700;
}

.load-list {
    list-style: none;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.load-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.load-item:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-accent);
}

.load-item-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.load-item-title {
    font-size: 0.88rem;
    font-weight: 500;
}

.load-item-meta {
    font-size: 0.72rem;
    color: var(--text-muted);
}

.load-item-actions {
    display: flex;
    gap: var(--space-xs);
}

/* ═══════════════════════════════════════
   TOAST
   ═══════════════════════════════════════ */

.toast-container {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    z-index: 9999;
    display: flex;
    flex-direction: column-reverse;
    gap: var(--space-sm);
    pointer-events: none;
}

.toast {
    pointer-events: auto;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 500;
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    animation: toastIn 0.3s var(--transition-spring);
    max-width: 360px;
}

.toast.toast-out {
    animation: toastOut 0.25s ease-in forwards;
}

@keyframes toastIn {
    from { opacity: 0; transform: translateX(40px) scale(0.95); }
    to { opacity: 1; transform: translateX(0) scale(1); }
}

@keyframes toastOut {
    from { opacity: 1; transform: translateX(0); }
    to { opacity: 0; transform: translateX(40px); }
}

.toast-success {
    background: rgba(34, 197, 94, 0.15);
    border-color: rgba(34, 197, 94, 0.3);
    color: #4ade80;
}

.toast-error {
    background: rgba(239, 68, 68, 0.15);
    border-color: rgba(239, 68, 68, 0.3);
    color: #f87171;
}

.toast-info {
    background: rgba(0, 212, 255, 0.12);
    border-color: rgba(0, 212, 255, 0.25);
    color: var(--accent);
}

.toast-warning {
    background: rgba(245, 158, 11, 0.15);
    border-color: rgba(245, 158, 11, 0.3);
    color: #fbbf24;
}

/* ═══════════════════════════════════════
   CONFIRM DIALOG
   ═══════════════════════════════════════ */

.confirm-overlay {
    position: fixed;
    inset: 0;
    z-index: 300;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(6, 6, 15, 0.85);
    backdrop-filter: blur(8px);
    animation: fadeIn 0.2s ease-out;
}

.confirm-card {
    width: 90%;
    max-width: 380px;
    padding: var(--space-xl);
    text-align: center;
    animation: slideUp 0.3s var(--transition-spring);
}

.confirm-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.confirm-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.confirm-card p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

.confirm-actions {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
}

.confirm-actions .btn {
    min-width: 100px;
}

/* ═══════════════════════════════════════
   LOADER
   ═══════════════════════════════════════ */

.loader-overlay {
    position: fixed;
    inset: 0;
    z-index: 250;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(6, 6, 15, 0.85);
    backdrop-filter: blur(10px);
    animation: fadeIn 0.3s ease-out;
}

.loader-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xl);
}

.loader-spinner {
    position: relative;
    width: 80px;
    height: 80px;
}

.orbit {
    position: absolute;
    inset: 0;
    border: 2px solid transparent;
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1.2s linear infinite;
}

.orbit-2 {
    inset: 8px;
    border-top-color: var(--accent-2);
    animation-duration: 1.8s;
    animation-direction: reverse;
}

.orbit-3 {
    inset: 16px;
    border-top-color: var(--success);
    animation-duration: 2.4s;
}

.core {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 12px;
    height: 12px;
    margin: -6px 0 0 -6px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 20px var(--accent-glow);
    animation: pulse-core 1.5s ease-in-out infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes pulse-core {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.5); opacity: 0.6; }
}

.loader-text {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    animation: pulse-text 2s ease-in-out infinite;
}

@keyframes pulse-text {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ═══════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════ */

@media (max-width: 900px) {
    .mobile-only { display: flex; }
    .btn-label { display: none; }

    .sidebar {
        position: fixed;
        top: var(--header-h);
        left: 0;
        bottom: 0;
        z-index: 50;
        width: 100%;
        max-width: 380px;
        transform: translateX(-100%);
        transition: transform var(--transition-base);
        border-radius: 0;
        background: var(--bg-primary);
    }

    .sidebar.open {
        transform: translateX(0);
        box-shadow: 20px 0 60px rgba(0, 0, 0, 0.5);
    }

    .preview-area {
        padding: var(--space-md);
    }

    .session-sheet {
        padding: 16px;
        font-size: 10px;
        border-radius: var(--radius-sm);
    }

    .app-header {
        padding: 0 var(--space-md);
    }

    .save-indicator .save-text { display: none; }
}

@media (max-width: 480px) {
    .form-row {
        grid-template-columns: 1fr;
    }

    .empty-steps {
        padding: 0;
    }

    .toast-container {
        left: var(--space-md);
        right: var(--space-md);
        bottom: var(--space-md);
    }

    .toast {
        max-width: 100%;
    }
}

/* ─── AUTHENTICATION UI ─── */
.auth-header-container {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.user-menu-container {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    background: rgba(255, 255, 255, 0.04);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

.user-email-tag {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
    white-space: nowrap;
    max-width: 150px;
    overflow: hidden;
    text-overflow: ellipsis;
}

#auth-modal .form-select {
    width: 100%;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.6rem 1rem;
    border-radius: var(--radius-md);
    font-family: var(--font);
    font-size: 0.9rem;
    outline: none;
    transition: border-color var(--transition-fast);
}

#auth-modal .form-select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-glow);
}


/* ─── FLOATING CHATBOT ─── */
.chatbot-container {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    z-index: 1000;
    font-family: var(--font);
}

.chatbot-bubble {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--accent-2), var(--accent));
    border: none;
    cursor: pointer;
    box-shadow: 0 8px 32px rgba(139, 92, 246, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    position: relative;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.chatbot-bubble:hover {
    transform: scale(1.08) rotate(5deg);
    box-shadow: 0 12px 40px rgba(139, 92, 246, 0.6);
}

.chatbot-bubble .pulse-ring {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: var(--radius-full);
    border: 2px solid var(--accent);
    animation: chat-pulse 2s infinite;
}

@keyframes chat-pulse {
    0% { transform: scale(0.95); opacity: 0.8; }
    50% { transform: scale(1.1); opacity: 0.4; }
    100% { transform: scale(1.3); opacity: 0; }
}

.chatbot-window {
    position: absolute;
    bottom: 80px;
    right: 0;
    width: 380px;
    height: 500px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--glass-border);
}

.chatbot-header {
    padding: var(--space-md);
    background: rgba(18, 18, 43, 0.85);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.chatbot-header-info {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.chatbot-dot {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: var(--radius-full);
    box-shadow: 0 0 10px var(--success);
}

.chatbot-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.chatbot-subtitle {
    font-size: 0.75rem;
    color: var(--text-accent);
}

.btn-close-chat {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.1rem;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.btn-close-chat:hover {
    color: var(--text-primary);
}

.chatbot-messages {
    flex: 1;
    padding: var(--space-md);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    background: rgba(6, 6, 15, 0.6);
}

.chat-message {
    display: flex;
    flex-direction: column;
    max-width: 80%;
}

.chat-message.bot {
    align-self: flex-start;
}

.chat-message.user {
    align-self: flex-end;
}

.chat-message .message-bubble {
    padding: 0.8rem 1rem;
    border-radius: 16px;
    font-size: 0.88rem;
    line-height: 1.4;
    word-break: break-word;
}

.chat-message.bot .message-bubble {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-bottom-left-radius: 4px;
    border: 1px solid var(--border);
}

.chat-message.user .message-bubble {
    background: linear-gradient(135deg, var(--accent-2), var(--accent-dark));
    color: #fff;
    border-bottom-right-radius: 4px;
    box-shadow: var(--shadow-sm);
}

.chatbot-input-container {
    padding: var(--space-sm) var(--space-md);
    background: rgba(18, 18, 43, 0.85);
    border-top: 1px solid var(--border);
    display: flex;
    gap: var(--space-sm);
    align-items: center;
}

.chatbot-input-container input {
    flex: 1;
    background: var(--bg-deep);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.6rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    outline: none;
}

.chatbot-input-container input:focus {
    border-color: var(--accent);
}

.chatbot-input-container .btn {
    padding: 0.6rem 0.8rem;
}

@media (max-width: 480px) {
    .chatbot-window {
        width: calc(100vw - 32px);
        height: 400px;
        bottom: 70px;
    }
}