/* ==========================================================================
   The Brand Habit - Core Design System & Utility Framework
   Pure CSS (No Node.js/Tailwind/Vite build required)
   ========================================================================== */

:root {
    /* Primary / Brand */
    --primary: #4F46E5;
    --primary-hover: #4338CA;
    --primary-light: #EEF2FF;
    --primary-border: #C7D2FE;
    --brand-primary: #4F46E5;

    /* Secondary / Neutral */
    --secondary: #0284C7;
    --secondary-hover: #0369A1;

    /* Surfaces & Neutrals */
    --bg-app: #F8FAFC;
    --bg-surface: #FFFFFF;
    --bg-surface-hover: #F1F5F9;
    --bg-muted: #F8FAFC;
    --border-color: #E2E8F0;
    --border-subtle: #EDF2F7;

    /* Text Colors */
    --text-main: #0F172A;
    --text-muted: #64748B;
    --text-subtle: #94A3B8;
    --font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

    /* Status Tokens */
    --success: #10B981;
    --success-bg: #ECFDF5;
    --success-border: #A7F3D0;
    --success-text: #065F46;

    --warning: #F59E0B;
    --warning-bg: #FFFBEB;
    --warning-border: #FDE68A;
    --warning-text: #92400E;

    --danger: #EF4444;
    --danger-bg: #FEF2F2;
    --danger-border: #FECACA;
    --danger-text: #991B1B;

    --info: #3B82F6;
    --info-bg: #EFF6FF;
    --info-border: #BFDBFE;
    --info-text: #1E40AF;

    --purple: #8B5CF6;
    --purple-bg: #F5F3FF;
    --purple-border: #DDD6FE;
    --purple-text: #5B21B6;

    --teal: #0D9488;
    --teal-bg: #F0FDFA;
    --teal-border: #99F6E4;
    --teal-text: #115E59;

    /* Layout Dimensions */
    --sidebar-width: 260px;
    --header-height: 64px;
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
}

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

html, body {
    height: 100%;
    font-family: var(--font-family);
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-main);
    background-color: var(--bg-app);
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.15s ease-in-out;
}
a:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-main);
    font-weight: 600;
    line-height: 1.25;
}

p { margin-bottom: 0.5rem; }

/* ==========================================================================
   Flexbox Utilities
   ========================================================================== */
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.flex-wrap { flex-wrap: wrap; }
.flex-nowrap { flex-wrap: nowrap; }
.flex-1 { flex: 1 1 0%; }
.shrink-0 { flex-shrink: 0; }
.grow { flex-grow: 1; }

.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.items-stretch { align-items: stretch; }

.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }

.gap-1 { gap: 0.25rem; }
.gap-1\.5 { gap: 0.375rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }
.gap-8 { gap: 2rem; }

/* ==========================================================================
   CSS Grid System
   ========================================================================== */
.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
.grid-cols-7 { grid-template-columns: repeat(7, minmax(0, 1fr)); }
.grid-cols-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

.col-span-1 { grid-column: span 1 / span 1; }
.col-span-2 { grid-column: span 2 / span 2; }
.col-span-3 { grid-column: span 3 / span 3; }
.col-span-4 { grid-column: span 4 / span 4; }
.col-span-6 { grid-column: span 6 / span 6; }
.col-span-12 { grid-column: span 12 / span 12; }

/* Responsive Grid Breakpoints */
@media (min-width: 640px) {
    .sm\:flex-row { flex-direction: row; }
    .sm\:items-center { align-items: center; }
    .sm\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .sm\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .sm\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .sm\:grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

@media (min-width: 768px) {
    .md\:flex-row { flex-direction: row; }
    .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .md\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .md\:grid-cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
    .md\:grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
    .md\:col-span-2 { grid-column: span 2 / span 2; }
    .md\:col-span-3 { grid-column: span 3 / span 3; }
    .md\:col-span-4 { grid-column: span 4 / span 4; }
}

@media (min-width: 1024px) {
    .lg\:flex-row { flex-direction: row; }
    .lg\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .lg\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .lg\:grid-cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
    .lg\:grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
    .lg\:col-span-2 { grid-column: span 2 / span 2; }
    .lg\:col-span-3 { grid-column: span 3 / span 3; }
    .lg\:col-span-4 { grid-column: span 4 / span 4; }
}

/* ==========================================================================
   Spacing Utilities (Space-y, Padding, Margin)
   ========================================================================== */
.space-y-0\.5 > :not([hidden]) ~ :not([hidden]) { margin-top: 0.125rem; }
.space-y-1 > :not([hidden]) ~ :not([hidden]) { margin-top: 0.25rem; }
.space-y-2 > :not([hidden]) ~ :not([hidden]) { margin-top: 0.5rem; }
.space-y-3 > :not([hidden]) ~ :not([hidden]) { margin-top: 0.75rem; }
.space-y-4 > :not([hidden]) ~ :not([hidden]) { margin-top: 1rem; }
.space-y-6 > :not([hidden]) ~ :not([hidden]) { margin-top: 1.5rem; }
.space-y-8 > :not([hidden]) ~ :not([hidden]) { margin-top: 2rem; }

.p-0 { padding: 0; }
.p-1 { padding: 0.25rem; }
.p-1\.5 { padding: 0.375rem; }
.p-2 { padding: 0.5rem; }
.p-2\.5 { padding: 0.625rem; }
.p-3 { padding: 0.75rem; }
.p-3\.5 { padding: 0.875rem; }
.p-4 { padding: 1rem; }
.p-5 { padding: 1.25rem; }
.p-6 { padding: 1.5rem; }
.p-8 { padding: 2rem; }
.p-12 { padding: 3rem; }

.px-1 { padding-left: 0.25rem; padding-right: 0.25rem; }
.px-1\.5 { padding-left: 0.375rem; padding-right: 0.375rem; }
.px-2 { padding-left: 0.5rem; padding-right: 0.5rem; }
.px-2\.5 { padding-left: 0.625rem; padding-right: 0.625rem; }
.px-3 { padding-left: 0.75rem; padding-right: 0.75rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }

.py-0 { padding-top: 0; padding-bottom: 0; }
.py-0\.5 { padding-top: 0.125rem; padding-bottom: 0.125rem; }
.py-1 { padding-top: 0.25rem; padding-bottom: 0.25rem; }
.py-1\.5 { padding-top: 0.375rem; padding-bottom: 0.375rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-2\.5 { padding-top: 0.625rem; padding-bottom: 0.625rem; }
.py-3 { padding-top: 0.75rem; padding-bottom: 0.75rem; }
.py-4 { padding-top: 1rem; padding-bottom: 1rem; }
.py-6 { padding-top: 1.5rem; padding-bottom: 1.5rem; }
.py-8 { padding-top: 2rem; padding-bottom: 2rem; }
.py-10 { padding-top: 2.5rem; padding-bottom: 2.5rem; }
.py-12 { padding-top: 3rem; padding-bottom: 3rem; }
.py-16 { padding-top: 4rem; padding-bottom: 4rem; }

.pt-1 { padding-top: 0.25rem; }
.pt-2 { padding-top: 0.5rem; }
.pt-3 { padding-top: 0.75rem; }
.pt-4 { padding-top: 1rem; }
.pt-5 { padding-top: 1.25rem; }
.pb-3 { padding-bottom: 0.75rem; }

.m-0 { margin: 0; }
.mx-auto { margin-left: auto; margin-right: auto; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-1\.5 { margin-bottom: 0.375rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mt-0\.5 { margin-top: 0.125rem; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mr-1\.5 { margin-right: 0.375rem; }
.mr-2 { margin-right: 0.5rem; }

/* Sizing Utilities */
.w-full { width: 100%; }
.w-auto { width: auto; }
.w-2 { width: 0.5rem; }
.w-3\.5 { width: 0.875rem; }
.w-4 { width: 1rem; }
.w-6 { width: 1.5rem; }
.w-8 { width: 2rem; }
.w-10 { width: 2.5rem; }
.w-48 { width: 12rem; }
.w-56 { width: 14rem; }
.w-100 { width: 100%; }

.h-full { height: 100%; }
.h-auto { height: auto; }
.h-2 { height: 0.5rem; }
.h-3\.5 { height: 0.875rem; }
.h-4 { height: 1rem; }
.h-6 { height: 1.5rem; }
.h-12 { height: 3rem; }
.h-40 { height: 10rem; }

.min-h-\[120px\] { min-height: 120px; }
.min-w-0 { min-width: 0; }
.min-w-\[120px\] { min-width: 120px; }
.min-w-\[140px\] { min-width: 140px; }
.min-w-\[150px\] { min-width: 150px; }
.min-w-\[180px\] { min-width: 180px; }
.max-w-xs { max-width: 20rem; }
.max-w-sm { max-width: 24rem; }
.max-w-md { max-width: 28rem; }
.max-w-lg { max-width: 32rem; }
.max-w-2xl { max-width: 42rem; }
.max-w-4xl { max-width: 56rem; }

.fixed { position: fixed; }
.absolute { position: absolute; }
.relative { position: relative; }
.inset-0 { top: 0; right: 0; bottom: 0; left: 0; }
.z-50 { z-index: 50; }

.block { display: block; }
.inline-block { display: inline-block; }
.inline { display: inline; }
.hidden, .d-none { display: none !important; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.overflow-hidden { overflow: hidden; }
.overflow-x-auto { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.overflow-y-auto { overflow-y: auto; }
.cursor-pointer { cursor: pointer; }
.cursor-not-allowed { cursor: not-allowed; }
.transition { transition: all 0.15s ease-in-out; }
.shadow-sm { box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05); }
.shadow-md { box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04); }
.shadow-lg { box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03); }
.shadow-xl { box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04); }
.backdrop-blur-xs { backdrop-filter: blur(2px); }
.bg-slate-900\/50 { background-color: rgba(15, 23, 42, 0.5); }

/* ==========================================================================
   Typography & Colors
   ========================================================================== */
.text-\[10px\] { font-size: 10px; line-height: 14px; }
.text-\[11px\] { font-size: 11px; line-height: 15px; }
.text-xs { font-size: 0.75rem; line-height: 1rem; }
.text-sm { font-size: 0.8125rem; line-height: 1.25rem; }
.text-base { font-size: 0.875rem; line-height: 1.375rem; }
.text-lg { font-size: 1.125rem; line-height: 1.5rem; }
.text-xl { font-size: 1.25rem; line-height: 1.75rem; }
.text-2xl { font-size: 1.5rem; line-height: 2rem; }
.text-3xl { font-size: 1.875rem; line-height: 2.25rem; }

.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.font-mono { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace; }

.uppercase { text-transform: uppercase; }
.lowercase { text-transform: lowercase; }
.capitalize { text-transform: capitalize; }
.tracking-wider { letter-spacing: 0.05em; }
.tracking-tight { letter-spacing: -0.025em; }
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.italic { font-style: italic; }
.underline { text-decoration: underline; }
.hover\:underline:hover { text-decoration: underline; }

/* Text Palette */
.text-slate-900 { color: #0F172A; }
.text-slate-800 { color: #1E293B; }
.text-slate-700 { color: #334155; }
.text-slate-600 { color: #475569; }
.text-slate-500 { color: #64748B; }
.text-slate-400 { color: #94A3B8; }
.text-white { color: #FFFFFF; }

.text-brand-primary, .text-primary { color: #4F46E5 !important; }
.hover\:text-brand-primary:hover { color: #4338CA !important; }

.text-purple-600 { color: #9333EA; }
.text-emerald-600 { color: #059669; }
.text-emerald-700 { color: #047857; }
.text-emerald-800 { color: #065F46; }
.text-emerald-900 { color: #064E3B; }

.text-red-400 { color: #F87171; }
.text-red-500 { color: #EF4444; }
.text-red-600 { color: #DC2626; }
.text-red-700 { color: #B91C1C; }
.text-red-800 { color: #991B1B; }
.text-red-900 { color: #7F1D1D; }

.text-amber-600 { color: #D97706; }
.text-amber-700 { color: #B45309; }
.text-amber-900 { color: #78350F; }

.text-blue-600 { color: #2563EB; }
.text-blue-700 { color: #1D4ED8; }
.text-blue-900 { color: #1E3A8A; }
.text-indigo-600 { color: #4F46E5; }

/* ==========================================================================
   Backgrounds, Borders & Rounded
   ========================================================================== */
.bg-white { background-color: #FFFFFF; }
.bg-slate-50 { background-color: #F8FAFC; }
.bg-slate-100 { background-color: #F1F5F9; }
.bg-slate-100\/50 { background-color: rgba(241, 245, 249, 0.5); }
.bg-slate-200 { background-color: #E2E8F0; }

.bg-red-50 { background-color: #FEF2F2; }
.bg-red-50\/20 { background-color: rgba(254, 242, 242, 0.2); }
.bg-red-50\/50 { background-color: rgba(254, 242, 242, 0.5); }
.bg-red-50\/70 { background-color: rgba(254, 242, 242, 0.7); }
.bg-red-100 { background-color: #FEE2E2; }

.bg-amber-50 { background-color: #FFFBEB; }
.bg-amber-50\/20 { background-color: rgba(255, 251, 235, 0.2); }
.bg-amber-50\/40 { background-color: rgba(255, 251, 235, 0.4); }
.bg-amber-50\/60 { background-color: rgba(255, 251, 235, 0.6); }
.bg-amber-100 { background-color: #FEF3C7; }

.bg-emerald-50 { background-color: #ECFDF5; }
.bg-emerald-50\/50 { background-color: rgba(236, 253, 245, 0.5); }
.bg-emerald-100 { background-color: #D1FAE5; }
.bg-emerald-600 { background-color: #059669; }

.bg-purple-50 { background-color: #F5F3FF; }
.bg-purple-600 { background-color: #9333EA; }
.bg-blue-50 { background-color: #EFF6FF; }
.bg-blue-600 { background-color: #2563EB; }

.hover\:bg-slate-50:hover { background-color: #F8FAFC; }
.hover\:bg-slate-50\/50:hover { background-color: rgba(248, 250, 252, 0.5); }
.hover\:bg-slate-50\/70:hover { background-color: rgba(248, 250, 252, 0.7); }
.hover\:bg-emerald-50:hover { background-color: #ECFDF5; }
.hover\:bg-emerald-100:hover { background-color: #D1FAE5; }
.hover\:bg-emerald-700:hover { background-color: #047857; }
.hover\:bg-red-50:hover { background-color: #FEF2F2; }
.hover\:bg-red-100:hover { background-color: #FEE2E2; }
.hover\:bg-blue-700:hover { background-color: #1D4ED8; }
.hover\:bg-purple-700:hover { background-color: #7E22CE; }

.border { border: 1px solid var(--border-color); }
.border-b { border-bottom: 1px solid var(--border-color); }
.border-t { border-top: 1px solid var(--border-color); }
.border-slate-100 { border-color: #F1F5F9; }
.border-slate-200 { border-color: #E2E8F0; }
.border-slate-300 { border-color: #CBD5E1; }

.border-red-200 { border-color: #FECACA; }
.border-red-300 { border-color: #FCA5A5; }
.border-amber-200 { border-color: #FDE68A; }
.border-amber-500 { border-color: #F59E0B; }
.border-emerald-200 { border-color: #A7F3D0; }
.border-emerald-300 { border-color: #6EE7B7; }
.border-blue-200 { border-color: #BFDBFE; }

.border-l-4 { border-left-width: 4px; border-left-style: solid; }
.border-l-red-500 { border-left-color: #EF4444; }
.border-l-amber-500 { border-left-color: #F59E0B; }
.border-l-emerald-500 { border-left-color: #10B981; }

.divide-y > :not([hidden]) ~ :not([hidden]) { border-top-width: 1px; border-top-style: solid; }
.divide-x > :not([hidden]) ~ :not([hidden]) { border-left-width: 1px; border-left-style: solid; }
.divide-slate-100 > :not([hidden]) ~ :not([hidden]) { border-color: #F1F5F9; }
.divide-slate-200 > :not([hidden]) ~ :not([hidden]) { border-color: #E2E8F0; }

.rounded { border-radius: 0.25rem; }
.rounded-sm { border-radius: 0.125rem; }
.rounded-md { border-radius: 0.375rem; }
.rounded-lg { border-radius: 0.5rem; }
.rounded-xl { border-radius: 0.75rem; }
.rounded-full { border-radius: 9999px; }

/* Status Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 8px;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    white-space: nowrap;
    line-height: 1.2;
}

.badge-green { background-color: var(--success-bg); color: var(--success-text); border: 1px solid var(--success-border); }
.badge-amber { background-color: var(--warning-bg); color: var(--warning-text); border: 1px solid var(--warning-border); }
.badge-red { background-color: var(--danger-bg); color: var(--danger-text); border: 1px solid var(--danger-border); }
.badge-blue { background-color: var(--info-bg); color: var(--info-text); border: 1px solid var(--info-border); }
.badge-purple { background-color: var(--purple-bg); color: var(--purple-text); border: 1px solid var(--purple-border); }
.badge-teal { background-color: var(--teal-bg); color: var(--teal-text); border: 1px solid var(--teal-border); }
.badge-slate { background-color: #F1F5F9; color: #475569; border: 1px solid #CBD5E1; }
.badge-indigo { background-color: var(--primary-light); color: var(--primary); border: 1px solid var(--primary-border); }
.badge-emerald { background-color: #ECFDF5; color: #047857; border: 1px solid #6EE7B7; }

/* Alerts */
.alert {
    padding: 12px 16px;
    margin-bottom: 16px;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}
.alert-success { background-color: var(--success-bg); color: var(--success-text); border: 1px solid var(--success-border); }
.alert-warning { background-color: var(--warning-bg); color: var(--warning-text); border: 1px solid var(--warning-border); }
.alert-danger { background-color: var(--danger-bg); color: var(--danger-text); border: 1px solid var(--danger-border); }
.alert-info { background-color: var(--info-bg); color: var(--info-text); border: 1px solid var(--info-border); }