/* AIBase Design System - Based on Figma Design */

/* Font Declarations */
@font-face {
  font-family: 'N27';
  src: url('../fonts/n27-regular-webfont.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Basier Square';
  src: url('../fonts/basiersquare-regular-webfont.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Basier Square';
  src: url('../fonts/basiersquare-medium-webfont.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

/* Responsive Base Font Size */
html {
  font-size: 16px;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

@media (max-width: 1200px) {
  html {
    font-size: 15px;
  }
}

@media (max-width: 1024px) {
  html {
    font-size: 14px;
  }
}

@media (max-width: 768px) {
  html {
    font-size: 14px;
  }
}

@media (max-width: 640px) {
  html {
    font-size: 15px;
  }
}

/* CSS Variables - Design System Tokens (from Figma) */
:root {
  /* ==================== TEXT COLORS ==================== */
  --text-placeholder: #BDBDBD;
  --text-primary: #2A2D33;
  --text-secondary: #585F69;
  --text-tertiary: #7E818D;
  --text-inverse: #FFFFFF;
  --text-disabled: #A4A7AE;
  --text-strong: #0E121B;
  --text-subtle: #525866;
  --text-soft: #99A0AE;
  --text-display: #353D4C;
  --link-primary: #335CFF;

  /* ==================== BUTTON COLORS ==================== */
  --button-primary-bg: #070707;
  --button-primary-hover: #2B323F;
  --button-primary-text: #FFFFFF;
  --button-secondary-bg: transparent;
  --button-secondary-hover: #F8F8F8;
  --button-secondary-text: var(--text-primary);
  --button-secondary-border: #070707;
  --button-disabled-bg: #EFEFEF;
  --button-disabled-text: #BDBDBD;
  --button-disabled-border: #BDBDBD;
  --button-danger-hover: var(--error-strong);
  --button-ghost-hover: var(--surface-prompt-hover);
  --button-ghost-active: var(--surface-prompt-bg);

  /* ==================== BACKGROUND COLORS ==================== */
  --background-primary: #F5F1ED;
  --background-secondary: #F5F6F8;
  --background-tertiary: #FBFBFB;
  --background-warm: #F4F1EB;
  --background-cool: #EEF2FB;
  --background-inverse: #2A2D33;
  --background-white: #FFFFFF;
  --background-tooltip: #27232A;
  --menu-item-hover-bg: var(--neutral-100);
  --menu-item-selected-bg: #E7E6E4;

  /* ==================== OVERLAYS ==================== */
  --modal-overlay: rgba(42, 45, 51, 0.35);

  /* ==================== CARDS AND BOXES ==================== */
  --card-background: #FFFFFF;
  --card-border: rgba(42, 45, 51, 0.08);
  --card-hover-border: rgba(42, 45, 51, 0.16);
  --card-selected: #F0ECFE;
  --card-shadow: 0 0.75rem 1.75rem rgba(23, 27, 41, 0.08);
  --card-shadow-hover: 0 1.125rem 2.5rem rgba(23, 27, 41, 0.12);
  --card-shadow-strong: 0 1.5rem 3.75rem rgba(23, 27, 41, 0.18);

  /* ==================== BORDER COLORS ==================== */
  --border-default: #E5E5E5;
  --border-strong: #D6D6D6;
  --border-medium: var(--border-default);
  --border-soft: rgba(42, 45, 51, 0.08);
  --border-inverse: rgba(255, 255, 255, 0.85);
  --border-focus: #4D6CE7;
  --border-error: #B60000;

  /* ==================== CONTAINER SOFT (GLASS) ==================== */
  --container-soft-bg: rgba(255, 255, 255, 0.7);
  --container-soft-border: rgba(255, 255, 255, 0.9);
  --container-soft-shadow: 0 0.75rem 1.75rem rgba(23, 27, 41, 0.08);
  --container-muted-bg: rgba(255, 255, 255, 0.45);
  --container-muted-border: rgba(255, 255, 255, 0.6);
  --container-solid-bg: rgba(255, 255, 255, 0.9);
  --container-strong-bg: rgba(255, 255, 255, 0.98);
  
  /* ==================== PANELS (SIDEBAR/GLASS PANELS) ==================== */
  --panel-bg: rgba(255, 255, 255, 0.5);
  --panel-border: rgba(255, 255, 255, 0.8);
  --panel-shadow: 0 0.25rem 0.313rem rgba(0, 0, 0, 0.08);

  /* ==================== GLASS LEGACY (APP CSS) ==================== */
  --glass-white-05: rgba(255, 255, 255, 0.05);
  --glass-white-10: rgba(255, 255, 255, 0.1);
  --glass-white-15: rgba(255, 255, 255, 0.15);
  --glass-white-18: rgba(255, 255, 255, 0.18);
  --glass-white-20: rgba(255, 255, 255, 0.2);
  --glass-white-25: rgba(255, 255, 255, 0.25);
  --glass-white-30: rgba(255, 255, 255, 0.3);
  --glass-white-40: rgba(255, 255, 255, 0.4);
  --glass-white-50: rgba(255, 255, 255, 0.5);
  --glass-white-60: rgba(255, 255, 255, 0.6);
  --glass-white-80: rgba(255, 255, 255, 0.8);
  --glass-white-90: rgba(255, 255, 255, 0.9);
  --glass-dark-10: rgba(39, 35, 42, 0.1);
  --glass-dark-25: rgba(39, 35, 42, 0.25);
  --glass-shadow-primary: 0 0.5rem 2rem 0 rgba(31, 38, 135, 0.37);
  --glass-shadow-secondary: 0 1rem 2.5rem rgba(31, 38, 135, 0.2);
  --glass-shadow-hover: 0 0.75rem 2.5rem rgba(31, 38, 135, 0.3);
  --glass-shadow-soft: 0 0.5rem 2rem rgba(31, 38, 135, 0.2);

  /* ==================== SURFACE / GLASS THEME (GLOBAL) ==================== */
  --chat-background: var(--background-primary);
  --chat-surface: rgba(255, 255, 255, 0.82);
  --chat-surface-strong: rgba(255, 255, 255, 0.95);
  --chat-surface-muted: rgba(255, 255, 255, 0.64);
  --chat-border-strong: rgba(255, 255, 255, 0.72);
  --chat-border-soft: rgba(42, 45, 51, 0.06);
  --chat-hero-icon-bg: #fde7c2;
  --chat-hero-icon-ring: #f8d696;
  --chat-prompt-bg: rgba(255, 255, 255, 0.85);
  --chat-prompt-hover: rgba(255, 255, 255, 0.95);
  --chat-prompt-border: rgba(42, 45, 51, 0.08);
  --chat-muted-text: #5c5248;
  --chat-highlight: #f2c166;
  --chat-user-message-bg: #4D6CE7;
  --chat-assistant-message-bg: #7E818D;
  --chat-header-gradient: linear-gradient(180deg, rgba(255, 255, 255, 0.55) 0%, rgba(255, 255, 255, 0.15) 100%);
  --glass-blur: 18px;
  --glass-blur-xs: 0.3125rem;
  --glass-blur-xs-plus: 0.34375rem;
  --glass-blur-sm: 0.625rem;
  --glass-blur-sm-plus: 1.375rem;
  --glass-blur-md: 0.9375rem;
  --glass-blur-lg: 1.25rem;
  --glass-blur-xl: 1.5625rem;

  /* Global aliases (apply across all glass panels, not just chat) */
  --surface-background: var(--chat-background);
  --surface-main: var(--chat-surface);
  --surface-strong: var(--chat-surface-strong);
  --surface-muted: var(--chat-surface-muted);
  --surface-border-strong: var(--chat-border-strong);
  --surface-border-soft: var(--chat-border-soft);
  --surface-prompt-bg: var(--chat-prompt-bg);
  --surface-prompt-hover: var(--chat-prompt-hover);
  --surface-prompt-border: var(--chat-prompt-border);
  --surface-muted-text: var(--chat-muted-text);
  --surface-highlight: var(--chat-highlight);

  /* ==================== DIVIDER ==================== */
  --divider-default: #E5E5E5;
  --divider-light: rgba(42, 45, 51, 0.08);
  --divider-strong: #D6D6D6;

  /* ==================== ERROR STATE ==================== */
  --error-primary: #B60000;
  --error-secondary: #A01830;
  --error-strong: #8F0000;
  --error-text: #991B1B;
  --error-primary-rgb: 182, 0, 0;
  --error-background: #FEF2F2;
  --error-border: #FECACA;
  --error-light: rgba(182, 0, 0, 0.1);

  /* ==================== SUCCESS STATE ==================== */
  --success-primary: #2FA36B;
  --success-strong: #059669;
  --success-text: #065F46;
  --success-background: #F0FDF4;
  --success-border: #BBF7D0;
  --success-light: rgba(47, 163, 107, 0.1);

  /* ==================== WARNING STATE ==================== */
  --warning-primary: #E3A008;
  --warning-text: #92400E;
  --warning-background: #FFFBEB;
  --warning-border: #FDE68A;
  --warning-light: rgba(227, 160, 8, 0.1);

  /* ==================== INFO STATE ==================== */
  --info-primary: #4D6CE7;
  --info-background: #EFF6FF;
  --info-border: #BFDBFE;
  --info-light: rgba(77, 108, 231, 0.1);

  /* ==================== AVATAR PALETTE ==================== */
  --avatar-text-color: var(--text-inverse);
  --avatar-border-default: var(--background-white);
  --avatar-initials-scale: 0.4;
  --avatar-color-1: #4D6CE7;
  --avatar-color-2: #6567F8;
  --avatar-color-3: #2FA36B;
  --avatar-color-4: #E3A008;
  --avatar-color-5: #A01830;
  --avatar-color-6: #8B5CF6;
  --avatar-color-7: #0891B2;
  --avatar-color-8: #DC2626;
  --avatar-color-9: #7C3AED;
  --avatar-color-10: #059669;
  --avatar-color-11: #D97706;
  --avatar-color-12: #DB2777;
  --agent-gradient-default: linear-gradient(271deg, #ffb3ba 2%, #ff9aa2 72%) top left / auto auto no-repeat,
    linear-gradient(271deg, #84d6fc 2%, #6567f8 70%) top left / auto auto no-repeat;
  --agent-gradient-1: linear-gradient(269.63deg, #F284FC 0.05%, #8CB7EF 71.15%);
  --agent-gradient-2: linear-gradient(269.63deg, #84FCB8 0.05%, #4FB1DE 71.15%);
  --agent-gradient-3: linear-gradient(269.63deg, #FC84B4 0.05%, #6567F8 71.15%);
  --agent-gradient-4: linear-gradient(269.63deg, #B884FC 0.05%, #67F8A2 71.15%);
  --agent-gradient-5: linear-gradient(269.63deg, #84FCD6 0.05%, #8E65F8 71.15%);
  --agent-gradient-6: linear-gradient(269.63deg, #FC8484 0.05%, #65C8F8 71.15%);
  --agent-gradient-7: linear-gradient(269.63deg, #FC84E8 0.05%, #65F89B 71.15%);

  /* ==================== GRAPHICS / ACCENT ==================== */
  --accent-primary-rgb: 77, 108, 231;
  --accent-primary: #4D6CE7;
  --accent-primary-hover: #3B55C9;
  --accent-primary-light: #DEE5FE;
  --accent-primary-lightest: rgba(77, 108, 231, 0.12);
  --accent-chip-bg: #EAEDFF;
  --accent-chip-border: #BECCFF;
  --accent-gradient-start: #6567F8;
  --accent-gradient-end: #84D6FC;
  --accent-secondary: #785D8F;
  --accent-secondary-rgb: 120, 93, 143;
  --accent-hover: var(--accent-primary-hover);
  --accent-blue: #2563EB;
  --accent-blue-light: #0EA5E9;
  --accent-blue-lightest: #EFF6FF;
  --accent-purple: #7C3AED;
  --accent-purple-lightest: #F5F3FF;

  /* ==================== WORKFLOW NODE COLORS ==================== */
  --workflow-node-trigger: #34C759;
  --workflow-node-action: #007AFF;
  --workflow-node-logic: #AF52DE;
  --workflow-node-output: #5856D6;
  --accent-green: #22C55E;
  --accent-orange: #F97316;
  --accent-yellow: #FACC15;
  --accent-pink: #F472B6;

  /* ==================== KNOWLEDGE GRAPH / MAP ==================== */
  --knowledge-graph-bg: radial-gradient(circle at 25% 20%, rgba(59, 130, 246, 0.08), transparent 45%),
    radial-gradient(circle at 70% 15%, rgba(236, 72, 153, 0.08), transparent 55%),
    linear-gradient(140deg, var(--background-white) 0%, var(--background-secondary) 60%, var(--background-white) 100%);
  --knowledge-graph-border: rgba(15, 23, 42, 0.06);
  --knowledge-graph-inner-shadow: inset 0 0 2.8125rem rgba(15, 23, 42, 0.04);
  --knowledge-graph-edge: rgba(148, 163, 184, 0.4);
  --knowledge-graph-edge-arrow: rgba(148, 163, 184, 0.5);
  --knowledge-graph-node-stroke: rgba(15, 23, 42, 0.2);
  --knowledge-graph-node-shadow: 0 0.1875rem 0.375rem rgba(15, 23, 42, 0.18);
  --knowledge-graph-node-text: rgba(71, 85, 105, 0.85);
  --knowledge-graph-node-selected-shadow: 0 0 0.625rem rgba(249, 115, 22, 0.4);
  --knowledge-graph-tooltip-border: rgba(15, 23, 42, 0.08);
  --knowledge-graph-tooltip-shadow: 0 0.75rem 2.1875rem rgba(15, 23, 42, 0.18);
  --knowledge-map-surface: linear-gradient(145deg, rgba(255, 255, 255, 0.98) 0%, rgba(238, 242, 248, 0.9) 100%);
  --knowledge-map-grid-line: rgba(209, 213, 219, 0.25);
  --knowledge-map-grid-line-strong: rgba(209, 213, 219, 0.2);
  --knowledge-map-detail-border: rgba(148, 163, 184, 0.2);
  --knowledge-map-tooltip-bg: var(--background-white);
  --knowledge-map-tooltip-shadow: 0 1.25rem 3.125rem rgba(41, 48, 66, 0.18);
  --knowledge-map-tooltip-border: var(--background-secondary);

  /* ==================== CONTROL SURFACES ==================== */
  --toggle-track-bg: var(--background-secondary);

  /* ==================== TABLE ==================== */
  --table-header-bg: #F5F6F8;
  --table-header-text: #585F69;
  --table-row-hover: #FBFBFB;
  --table-border: #E5E5E5;
  --table-selected: #F0ECFE;

  /* ==================== NEUTRAL SCALE ==================== */
  --neutral-50: #FEFEFE;
  --neutral-75: #FBFBFB;
  --neutral-100: #F5F5F5;
  --neutral-150: #EFEFEF;
  --neutral-200: #EAEAEA;
  --neutral-250: #E1E4EA;
  --neutral-300: #E5E7EB;
  --neutral-350: #F2F4F7;
  --neutral-400: #D1D5DB;
  --neutral-500: #A4A7AE;
  --neutral-600: #7E818D;
  --neutral-700: #585F69;
  --neutral-800: #414651;
  --neutral-900: #2A2D33;
  --neutral-950: #070707;

  /* ==================== CODE SYNTAX COLORS ==================== */
  --code-bg: #0F172A;
  --code-fg: #E2E8F0;
  --code-border: #0B1220;
  --code-inline-bg: #F3F4F6;
  --code-inline-fg: #1F2937;

  /* ==================== TYPOGRAPHY ==================== */
  --font-family-primary: 'Basier Square', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-family-heading: 'N27', sans-serif;
  --font-family-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', 'Droid Sans Mono', 'Source Code Pro', monospace;

  /* Font Sizes - Body */
  --font-size-body-md: 1rem;        /* 16px */
  --font-size-body-s: 0.875rem;     /* 14px */
  --font-size-body-xs: 0.75rem;     /* 12px */
  --font-size-body-xxs: 0.8125rem;  /* 13px */
  --font-size-body-sm: 0.9375rem;   /* 15px */
  --font-size-body-lg: 1.0625rem;   /* 17px */
  --font-size-body-xl: 1.25rem;     /* 20px */
  --font-size-caption: 0.625rem;    /* 10px - sidebar labels */

  /* Font Sizes - Display */
  --font-size-display-md: 2.25rem;  /* 36px */
  --font-size-display-ml: 2.5rem;  /* 40px */
  --font-size-display-s: 1.75rem;   /* 28px */
  --font-size-display-xs: 1.375rem; /* 22px */
  --font-size-display-lg: 3rem;     /* 48px */
  --font-size-display-xl: 4rem;     /* 64px */

  /* Font Sizes - Headings */
  --font-size-heading-sm: 1.5rem;   /* 24px */
  --font-size-heading-md: 1.6rem;   /* 25.6px */
  --font-size-heading-lg: 1.9rem;   /* 30.4px */

  /* Font Sizes - Interface */
  --font-size-interface-l: 1.125rem; /* 18px */

  /* Legacy Font Size Variables (for backwards compatibility) */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.375rem;
  --font-size-2xl: 1.75rem;
  --font-size-3xl: 2.25rem;

  /* Line Heights - Body */
  --line-height-body-md: 1.5;       /* 24px / 16px */
  --line-height-body-s: 1.4286;     /* 20px / 14px */
  --line-height-body-xs: 1.5;       /* 18px / 12px */
  --line-height-body-xs-tight: 1;   /* 100% */
  --line-height-body-xs-medium: 1.3333; /* 16px / 12px */
  --line-height-body-xs-tall: 1.6667; /* 20px / 12px */

  /* Line Heights - Display */
  --line-height-display-md: 1.2222; /* 44px / 36px */
  --line-height-display-s: 1.2857;  /* 36px / 28px */
  --line-height-display-xs: 1.2727; /* 28px / 22px */

  /* Line Heights - Interface */
  --line-height-interface-l: 1.5556; /* 28px / 18px */

  /* Legacy Line Height Variables (for backwards compatibility) */
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.6;
  --line-height-loose: 2;

  /* Font Weights */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Letter Spacing */
  --tracking-tight: 0.03125rem;
  --tracking-wide: 0.05em;
  --tracking-wider: 0.06em;
  --tracking-widest: 0.08em;
  --tracking-ultra: 0.12em;
  --tracking-max: 0.16em;

  /* ==================== SPACING (rem-based) ==================== */
  --space-0: 0;
  --space-0-5: 0.125rem;
  --space-1: 0.25rem;
  --space-1-25: 0.3125rem;
  --space-1-5: 0.375rem;
  --space-1-75: 0.4375rem;
  --space-2: 0.5rem;
  --space-2-25: 0.5625rem;
  --space-2-5: 0.625rem;
  --space-2-75: 0.6875rem;
  --space-3: 0.75rem;
  --space-3-5: 0.875rem;
  --space-4: 1rem;
  --space-4-5: 1.125rem;
  --space-5: 1.25rem;
  --space-5-75: 1.4375rem;
  --space-6: 1.5rem;
  --space-7: 1.75rem;
  --space-8: 2rem;
  --space-9: 2.25rem;
  --space-10: 2.5rem;
  --space-11: 2.75rem;
  --space-12: 3rem;
  --space-13: 3.25rem;
  --space-14: 3.5rem;
  --space-15: 3.75rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Semantic Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 2.5rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* ==================== BORDER RADIUS (rem-based) ==================== */
  --radius-none: 0;
  --radius-3xs: 0.1875rem;
  --radius-2xs: 0.375rem;
  --radius-xs: 0.25rem;
  --radius-sm: 0.5rem;
  --radius-base: 0.75rem;
  --radius-md: 1rem;
  --radius-lg: 2rem;
  --radius-xl: 3.125rem;
  --radius-2xl: 6.25rem;
  --radius-full: 50%;
  --radius-circle: 9999px;

  /* ==================== BORDER WIDTHS ==================== */
  --border-width-hairline: 0.03125rem;
  --border-width-xs: 0.0625rem;
  --border-width-sm: 0.125rem;
  --border-width-md: 0.1875rem;
  --border-width-lg: 0.25rem;

  /* ==================== STROKE WIDTHS ==================== */
  --stroke-width-sm: 1;
  --stroke-width-md: 1.5;
  --stroke-width-lg: 2;

  /* ==================== SHADOWS ==================== */
  --shadow-xs: 0 0.0625rem 0.125rem rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 0.25rem 0.75rem rgba(39, 35, 42, 0.08);
  --shadow-md: 0 0.75rem 2.5rem rgba(39, 35, 42, 0.15);
  --shadow-lg: 0 1.25rem 3.75rem rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 1.75rem 3rem rgba(15, 23, 42, 0.16);
  --shadow-card-soft: 0 0.125rem 0.5rem rgba(0, 0, 0, 0.04);
  --shadow-soft: 0 0.75rem 1.75rem rgba(23, 27, 41, 0.08);
  --shadow-medium: 0 1.125rem 2.5rem rgba(23, 27, 41, 0.12);
  --shadow-strong: 0 1.5rem 3.75rem rgba(23, 27, 41, 0.18);
  --shadow-map-surface: 0 1.125rem 2.375rem rgba(15, 23, 42, 0.12);
  --shadow-inner: inset 0 0.125rem 0.25rem rgba(0, 0, 0, 0.06);
  --shadow-inset-strong: inset 0 0.125rem 0.25rem rgba(0, 0, 0, 0.3);
  --surface-inset-shadow: inset 0 0 0 var(--border-width-xs) rgba(10, 13, 18, 0.18),
    inset 0 calc(var(--border-width-sm) * -1) 0 0 rgba(10, 13, 18, 0.05);
  --shadow-toggle-thumb: 0 0.0625rem 0.1875rem 0 rgba(10, 13, 18, 0.1),
    0 0.0625rem 0.125rem -0.0625rem rgba(10, 13, 18, 0.1);

  /* ==================== FOCUS RINGS ==================== */
  --focus-ring-primary: 0 0 0 0.1875rem rgba(var(--accent-primary-rgb), 0.12);
  --focus-ring-error: 0 0 0 0.1875rem rgba(var(--error-primary-rgb), 0.1);
  --focus-ring-inverse: 0 0 0 0.2rem rgba(255, 255, 255, 0.1);
  --focus-ring-glass: 0 0 0 0.1rem var(--glass-white-20), 0 0 0 0.25rem var(--glass-white-10);
  --focus-ring-toggle: 0 0.0625rem 0.125rem 0 rgba(10, 13, 18, 0.05),
    0 0 0 0.125rem var(--neutral-150),
    0 0 0 0.25rem var(--accent-primary);

  /* ==================== Z-INDEX ==================== */
  --z-base: 0;
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  --z-notification: 1080;
  --z-max: 9999;

  /* ==================== TRANSITIONS ==================== */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-medium: 0.5s ease;
  --transition-slow: 1s ease;

  /* Transition Properties */
  --transition-colors: color 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
  --transition-transform: transform 0.3s ease;
  --transition-opacity: opacity 0.3s ease;
  --transition-all: all 0.3s ease;

  /* ==================== LAYOUT ==================== */
  --layout-max-width: 80rem;
  --layout-max-width-narrow: 72.5rem;
  --layout-sidebar-width: 20rem;
  --layout-sidebar-collapsed: 4.25rem;
  --layout-header-height: 4rem;
  --layout-footer-height: 3.5rem;
  --layout-auth-card-width: 28rem;
  --layout-chat-main-max-width: 80rem;
  --layout-chat-sidebar-width: 20rem;
  --layout-chat-info-sidebar-width: 20rem;
  --layout-chat-panel-min-height: 58.5rem;
  --layout-chat-message-max-width: 48.75rem;
  --layout-chat-prompt-min-width: 15rem;
  --layout-chat-attachment-image-max-width: 17.5rem;
  --layout-chat-attachment-media-max-width: 22.5rem;
  --layout-chat-attachment-file-max-width: 13.75rem;
  --layout-chat-input-max-width: 48.75rem;
  --layout-chat-input-max-height: 18.75rem;
  --layout-chat-file-preview-width: 20rem;
  --layout-chat-file-preview-height: 3.625rem;
  --layout-chat-file-preview-image-size: 3.625rem;
  --layout-chat-file-preview-icon-size: 2.5rem;
  --layout-chat-menu-min-width: 10rem;
  --layout-chat-dropzone-width: 32.5rem;
  --layout-chat-dropzone-height: 18.75rem;
  --layout-member-picker-width: 32rem;
  --layout-member-picker-height: 34rem;
  --layout-member-picker-title-width: 18rem;
  --layout-tag-input-min-height: 3rem;
  --layout-tag-input-min-width: 7.5rem;
  --layout-knowledge-map-title-max-width: 33.75rem;
  --layout-knowledge-map-controls-max-width: 26.25rem;
  --layout-knowledge-map-sidebar-min: 20rem;
  --layout-knowledge-map-canvas-min-height: 22rem;
  --layout-knowledge-map-tooltip-min-width: 12rem;
  --layout-knowledge-graph-height: 72vh;
  --layout-knowledge-map-meta-min: 8.75rem;
  --layout-knowledge-map-grid-size: 6.875rem;
  --layout-dashboard-card-min-width: 18.75rem;
  --layout-dashboard-card-min-width-compact: 17.5rem;
  --layout-workflow-left-panel-width: 18rem;
  --layout-workflow-right-panel-width: 26.25rem;
  --layout-workflow-left-panel-width-compact: 16rem;
  --layout-workflow-right-panel-width-compact: 22rem;
  --layout-workflow-canvas-min-height: 56.9375rem;
  --layout-workflow-properties-max-height: 18.75rem;
  --layout-workflow-properties-max-height-compact: 15.625rem;
  --layout-workflow-node-width: 20rem;
  --layout-workflow-node-height: 5rem;
  --layout-workflows-empty-min-height: 25rem;
  --layout-slider-width: 16.25rem;
  --layout-dropdown-min-width: 10rem;
  --layout-dropdown-max-height: 20rem;
  --layout-folder-tree-indent-base: calc(var(--space-9) + var(--space-0-5));
  --layout-folder-tree-indent-step: calc(var(--space-6) + var(--space-0-5));
  --layout-folder-tree-item-padding-y: var(--space-2-5);
  --layout-folder-tree-item-padding-x: var(--space-3);
  --layout-sidepanel-icon: 1.35rem;

  /* ==================== DIMENSIONS ==================== */
  --size-6: 6rem;
  --size-7: 7rem;
  --size-7-5: 7.5rem;
  --size-8: 8rem;
  --size-8-75: 8.75rem;
  --size-9-375: 9.375rem;
  --size-10: 10rem;
  --size-11-25: 11.25rem;
  --size-12: 12rem;
  --size-12-125: 12.125rem;
  --size-12-5: 12.5rem;
  --size-15: 15rem;
  --size-16: 16rem;
  --size-17-5: 17.5rem;
  --size-18: 18rem;
  --size-18-75: 18.75rem;
  --size-20: 20rem;
  --size-25: 25rem;
  --size-28-125: 28.125rem;
  --size-31-25: 31.25rem;
  --size-32: 32rem;
  --size-32-5: 32.5rem;
  --size-36-375: 36.375rem;
  --size-37-5: 37.5rem;
  --size-45: 45rem;
  --size-48: 48rem;
  --size-50: 50rem;

  /* ==================== BREAKPOINTS (for reference in JS) ==================== */
  --breakpoint-sm: 40rem;
  --breakpoint-md: 48rem;
  --breakpoint-lg: 64rem;
  --breakpoint-xl: 80rem;
  --breakpoint-2xl: 96rem;
}

/* Error page */
.error-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  width: 100%;
  text-align: center;
  padding: 30px 20px;
  color: var(--text-secondary);
  background-color: var(--background-primary);
  font-family: var(--font-family-primary);
  font-weight: var(--font-weight-medium);
  line-height: 1;
}

.error-card {
  width: 100%;
  max-width: 1400px;
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  background-color: var(--panel-bg);
  padding: 24px;
  border: 1px solid var(--neutral-250);
  border-radius: 12px;
}

.error-code {
  position: relative;
  display: flex;
  flex-direction: column;
  font-size: 304px;
  margin: 0 301px;
  padding: 126px 279px 0;
  border-bottom: 1px solid var(--divider-strong);
  overflow: hidden;
}

.error-digit {
  display: inline-block;
}

.error-digit--left {
  position: absolute;
  top: 78px;
  left: 50%;
  transform: translateX(-50%) rotate(10deg);
  margin-left: -191px;
}

.error-digit--center {
  transform: rotate(1deg);
  margin-bottom: -127px;
}

.error-digit--right {
  position: absolute;
  top: 94px;
  left: 50%;
  transform: translateX(-50%) rotate(-11deg);
  margin-left: 203px;
}

.error-message {
  margin-top: 28px;
  font-size: var(--font-size-display-s);
  line-height: var(--line-height-display-s);
}

.error-action-button {
  align-self: center;
  padding: 10px 20px;
  border-radius: 12px;
  border: 1px solid var(--background-inverse);
  background-color: var(--background-inverse);
  color: var(--text-inverse);
  font-size: var(--font-size-body-md);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
}

/* Page template */
.page-shell {
  display: flex;
  flex-direction: column;
  gap: 32px;
  height: 100%;
}

.page-header {
  display: flex;
  align-items: flex-start;
  gap: 32px;
}

.page-header-text {
  display: flex;
  flex-direction: column;
  gap: 13px;
  flex: 1;
}

.page-title {
  margin: 0;
  color: var(--text-primary);
  font-size: var(--font-size-display-xs);
  line-height: var(--line-height-display-xs);
  font-weight: var(--font-weight-semibold);
}

.page-subtitle {
  margin: 0;
  color: var(--text-secondary);
  font-size: var(--font-size-body-s);
  line-height: var(--line-height-body-s);
}

.page-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.page-toolbar-left,
.page-toolbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

@media (max-width: 1280px) {
  .error-card {
    padding-inline: 16px;
  }

  .error-code {
    padding-inline: 32px;
    margin-inline: 0;
  }
}

@media (max-width: 576px) {
  .error-code {
    padding-inline: 16px;
  }
}

/* Global Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Base Styles */
body {
  font-family: var(--font-family-primary);
  color: var(--text-primary);
  background: var(--surface-background);
  line-height: var(--line-height-relaxed);
  min-height: 100vh;
  transition: background-color var(--transition-slow);
  overflow-x: hidden;
}

/* Typography Classes */
.title-text {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-normal);
  font-size: var(--font-size-2xl);
  line-height: var(--line-height-tight);
  background: linear-gradient(to right, var(--text-primary), var(--accent-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
  width: 100%;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.heading-large {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-3xl);
  line-height: 1;
  color: var(--text-primary);
}

.text-primary {
  color: var(--text-primary);
}

.text-secondary {
  color: var(--text-secondary);
}

.text-tertiary {
  color: var(--text-tertiary);
}

.text-inverse {
  color: var(--text-inverse);
}

/* Layout & Surface Utilities */
.page-shell {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  min-height: 0;
}

.page-shell.full-height {
  min-height: 100%;
}

.page-grid {
  display: grid;
  gap: var(--space-sm);
  align-items: flex-start;
}

.page-grid.two-columns {
  grid-template-columns: 20rem minmax(0, 1fr);
}

.page-grid.three-columns {
  grid-template-columns: 17.5rem minmax(0, 1fr) 20rem;
}

.panel-card {
  background: var(--panel-bg);
  border: var(--border-width-xs) solid var(--panel-border);
  border-radius: var(--radius-base);
  box-shadow: var(--panel-shadow);
  backdrop-filter: blur(var(--glass-blur-sm-plus));
}

.surface-solid {
  background: var(--container-solid-bg);
  border: 0.0625rem solid var(--border-soft);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
}

.surface-strong {
  background: var(--container-strong-bg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-medium);
}

.card-section {
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.scroll-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  overflow: auto;
}

/* Layout Components */
.container {
  width: 100%;
  max-width: var(--layout-max-width);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 3.75rem);
}

.container-narrow {
  max-width: var(--layout-max-width-narrow);
}

.section {
  width: 100%;
  padding: clamp(3.75rem, 8vw, 6rem) 0;
}

.section-large {
  padding: clamp(5rem, 12vw, 12.1875rem) 0;
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(18.75rem, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(15.625rem, 1fr));
}

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.flex-row {
  flex-direction: row;
}

.items-center {
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-sm {
  gap: var(--space-sm);
}

.gap-md {
  gap: var(--space-md);
}

.gap-lg {
  gap: var(--space-lg);
}

.gap-xl {
  gap: var(--space-xl);
}

/* Card Components */
.card {
  background: var(--card-background);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  box-shadow: var(--card-shadow);
  transition: var(--transition-all);
  border: 0.0625rem solid var(--card-border);
}

.card:hover {
  transform: translateY(-0.25rem);
  box-shadow: var(--card-shadow-hover);
  border-color: var(--card-hover-border);
}

.card-bordered {
  border: 0.125rem solid var(--border-default);
}

/* Button Components */
.btn {
  border-radius: var(--radius-base);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-body-md);
  padding: var(--space-2-5) var(--space-4);
  line-height: var(--line-height-body-md);
  gap: var(--space-1);
  font-family: var(--font-family-primary);
  cursor: pointer;
  border: var(--border-width-xs) solid transparent;
  transition: var(--transition-colors);
  box-sizing: border-box;
  width: fit-content;
  text-decoration: none;
}

.btn-icon {
  width: var(--space-4);
  height: var(--space-4);
}

.btn-icon-left {
  margin-right: var(--space-2);
}

.btn-icon-right {
  margin-left: var(--space-2);
}

.btn-primary {
  background: var(--button-primary-bg);
  color: var(--button-primary-text);
  border-color: transparent;
}

.btn-primary:hover:not(:disabled) {
  background: var(--button-primary-hover);
}

.btn-primary:active:not(:disabled) {
  background: var(--button-primary-hover);
  box-shadow: var(--shadow-inset-strong);
}

.btn-secondary {
  background: var(--button-secondary-bg);
  color: var(--button-secondary-text);
  border: var(--border-width-xs) solid var(--button-secondary-border);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--button-secondary-hover);
  color: var(--button-secondary-text);
}

.btn-primary:disabled {
  background: var(--button-disabled-bg);
  color: var(--button-disabled-text);
  opacity: 1;
  cursor: not-allowed;
  border-color: var(--button-disabled-border);
}

.btn-danger {
  background: var(--error-primary);
  color: var(--text-inverse);
  border-color: var(--error-primary);
}

.btn-danger:hover:not(:disabled) {
  background: var(--button-danger-hover);
  border-color: var(--button-danger-hover);
}

.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border: 0.0625rem solid transparent;
}

.btn-ghost:hover:not(:disabled) {
  background: var(--background-secondary);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Icon Buttons */
.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-base);
  border: 0.0625rem solid transparent;
  background: transparent;
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition-colors);
}

.icon-button--md {
  width: var(--space-8);
  height: var(--space-8);
}

.icon-button--sm {
  width: var(--space-6);
  height: var(--space-6);
}

.icon-button--lg {
  width: var(--space-10);
  height: var(--space-10);
}

.icon-button--default:hover:not(:disabled) {
  background: var(--background-secondary);
}

.icon-button--plain {
  border: none;
  background: transparent;
  transition: var(--transition-opacity);
}

.icon-button--plain:hover:not(:disabled) {
  opacity: 0.7;
  background: transparent;
}

.icon-button--danger {
  color: var(--error-primary);
}

.icon-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.icon-button img {
  width: var(--space-4);
  height: var(--space-4);
}

/* Form Controls */
.ui-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
}

.ui-input-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  width: 12px;
  height: 12px;
  z-index: 1;
  pointer-events: none;
  transform: translateY(-50%);
}

.ui-input,
.ui-textarea,
.ui-select {
  width: 100%;
  padding: 7px 11px 8px 12px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-base);
  background-color: var(--background-white);
  font-family: var(--font-family-primary);
  font-size: 16px;
  color: var(--text-primary);
  outline: none;
  transition: var(--transition-all);
  box-sizing: border-box;
}

.ui-input--with-icon {
  padding-left: 32px;
}

.ui-textarea {
  resize: vertical;
}

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

.ui-input:hover,
.ui-textarea:hover,
.ui-select:hover {
  border-color: var(--border-strong);
}

.ui-input:focus,
.ui-textarea:focus,
.ui-select:focus {
  border-color: var(--text-primary);
  box-shadow: none;
}

.ui-input:disabled,
.ui-textarea:disabled,
.ui-select:disabled {
  background: var(--background-secondary);
  color: var(--text-disabled);
}

.ui-input.error,
.ui-textarea.error,
.ui-select.error {
  border-color: var(--border-error);
  box-shadow: var(--focus-ring-error);
}

/* File Picker */
.ui-file-picker {
  position: relative;
}

.ui-file-picker.is-disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.w-full {
  width: 100%;
}

.h-full {
  height: 100%;
}

/* Margin Utilities */
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }
.mb-5 { margin-bottom: var(--space-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-xs); }
.mt-2 { margin-top: var(--space-sm); }
.mt-3 { margin-top: var(--space-md); }
.mt-4 { margin-top: var(--space-lg); }
.mt-5 { margin-top: var(--space-xl); }

/* Padding Utilities */
.p-0 { padding: 0; }
.p-1 { padding: var(--space-xs); }
.p-2 { padding: var(--space-sm); }
.p-3 { padding: var(--space-md); }
.p-4 { padding: var(--space-lg); }
.p-5 { padding: var(--space-xl); }

/* Focus Styles for Accessibility */
a:focus,
button:focus,
input:focus,
select:focus,
textarea:focus,
[contenteditable]:focus {
  outline: 0.125rem solid var(--border-focus);
  outline-offset: 0.125rem;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  outline: none !important;
}

h1:focus,
h2:focus,
h3:focus,
h4:focus,
h5:focus,
h6:focus {
  outline: none !important;
}

/* Background Variations */
.bg-primary {
  background-color: var(--background-inverse);
  color: var(--text-inverse);
}

.bg-light {
  background-color: var(--background-secondary);
}

.bg-warm {
  background-color: var(--background-warm);
}

.bg-cool {
  background-color: var(--background-cool);
}

/* Mobile Responsive Helpers */
@media (max-width: 48rem) {
  .mobile-hidden {
    display: none;
  }

  .mobile-block {
    display: block;
  }

  .mobile-text-center {
    text-align: center;
  }

  .mobile-full-width {
    width: 100%;
  }

  .title-text {
    text-align: center;
  }

  .btn-primary {
    width: 100%;
    max-width: 20rem;
    margin: 0 auto;
  }
}

/* Tablet Responsive */
@media (min-width: 48.0625rem) and (max-width: 64rem) {
  .tablet-text-center {
    text-align: center;
  }

  .tablet-full-width {
    width: 100%;
  }
}

/* Animation Classes */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(1.875rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeInUp 0.8s ease-out forwards;
}

.hover-lift {
  transition: var(--transition-transform);
}

.hover-lift:hover {
  transform: translateY(-0.25rem);
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  .title-text {
    background: none;
    -webkit-text-fill-color: var(--text-primary);
    color: var(--text-primary);
  }

  .btn:focus {
    outline: 0.1875rem solid var(--accent-primary);
    outline-offset: 0.1875rem;
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Print Styles */
@media print {
  body {
    background: var(--background-white);
    color: var(--neutral-900);
  }

  .title-text {
    background: none;
    -webkit-text-fill-color: var(--neutral-900);
    color: var(--neutral-900);
  }

  .btn {
    display: none !important;
  }
}