/**
 * ==============================================================================
 * DEEPAK KRISH PORTFOLIO — FOUNDATIONAL DESIGN SYSTEM & TOKENS
 * Premium, Restrained, Dark AI-Engineering Aesthetic
 * ==============================================================================
 */

/* ==============================================================================
   1. DESIGN TOKENS (ROOT - DARK THEME DEFAULT)
   ============================================================================== */
:root,
[data-theme="dark"] {
  /* ----------------------------------------------------------------------------
     Color Tokens — AI-Engineering Dark Palette
     ---------------------------------------------------------------------------- */
  --background: #0B0D10;             /* Main page background */
  --surface: #171A20;                /* Elevated surface / default card */
  --surface-elevated: #20242C;       /* Alternative surface / higher elevation */
  --accent: #C7F36B;                 /* Primary accent (Lime / Chartreuse) */
  --accent-foreground: #0B0D10;      /* Contrast text on accent backgrounds (15.3:1) */
  --accent-hover: #b5e855;           /* Interactive hover on accent */
  --accent-subtle: rgba(199, 243, 107, 0.08); /* Subtle accent tint */
  --accent-muted: rgba(199, 243, 107, 0.18);  /* Medium accent tint */

  --foreground: #F4F5F7;             /* Primary text (17.9:1 on bg) */
  --foreground-muted: #A1A7B3;       /* Secondary text (8.0:1 on bg) */
  --foreground-subtle: #858D9A;      /* Muted text & metadata (5.8:1 on bg) */

  --border: #303640;                 /* Default component & panel border */
  --border-strong: #454B56;          /* Emphasized or active border */
  --border-subtle: rgba(255, 255, 255, 0.06); /* Hairline internal dividers */

  --success: #86D99A;                /* Success status token */
  --success-subtle: rgba(134, 217, 154, 0.12);
  --error: #FF7777;                  /* Error status token */
  --error-subtle: rgba(255, 119, 119, 0.12);

  --ring-focus: var(--accent);       /* Keyboard navigation focus ring */

  /* ----------------------------------------------------------------------------
     Typography Tokens — Font Families & Fluid Sizing Scale
     ---------------------------------------------------------------------------- */
  --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  /* Fluid typography ranges: clamp(MIN, VAL, MAX) */
  --text-display: clamp(2.5rem, 4vw + 1rem, 4rem);           /* 40px – 64px */
  --text-section: clamp(1.75rem, 2vw + 1rem, 2.5rem);        /* 28px – 40px */
  --text-card: clamp(1.125rem, 1vw + 0.875rem, 1.5rem);      /* 18px – 24px */
  --text-body: clamp(1rem, 0.25vw + 0.9375rem, 1.125rem);    /* 16px – 18px */
  --text-secondary: clamp(0.875rem, 0.2vw + 0.825rem, 0.9375rem); /* 14px – 15px */
  --text-eyebrow: clamp(0.6875rem, 0.15vw + 0.65rem, 0.75rem);    /* 11px – 12px */
  --text-meta: clamp(0.75rem, 0.2vw + 0.7rem, 0.875rem);          /* 12px – 14px */

  /* Line Heights */
  --leading-none: 1;
  --leading-tight: 1.15;
  --leading-snug: 1.3;
  --leading-normal: 1.5;
  --leading-relaxed: 1.65;
  --leading-loose: 1.75;

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

  /* Tracking (Letter Spacing) */
  --tracking-tighter: -0.035em;
  --tracking-tight: -0.015em;
  --tracking-normal: 0em;
  --tracking-wide: 0.04em;
  --tracking-wider: 0.08em;
  --tracking-widest: 0.14em;

  /* ----------------------------------------------------------------------------
     Spacing Scale — 4px / 8px Rhythm
     ---------------------------------------------------------------------------- */
  --space-1: 0.25rem;   /* 4px: Minimal separation */
  --space-2: 0.5rem;    /* 8px: Compact element spacing */
  --space-3: 0.75rem;   /* 12px: Small component gaps */
  --space-4: 1rem;      /* 16px: Standard internal spacing */
  --space-6: 1.5rem;    /* 24px: Medium spacing */
  --space-8: 2rem;      /* 32px: Larger component spacing */
  --space-12: 3rem;     /* 48px: Section-related spacing */
  --space-16: 4rem;     /* 64px: Large layout spacing */
  --space-24: 6rem;     /* 96px: Generous desktop section spacing */

  /* Page Layout & Container */
  --container-max-width: 1200px;
  --container-padding: clamp(1rem, 4vw, 2rem);

  /* ----------------------------------------------------------------------------
     Borders, Corners & Shadows
     ---------------------------------------------------------------------------- */
  --radius-sm: 6px;     /* Small controls, tags, badges */
  --radius-md: 10px;    /* Standard controls, inputs, buttons */
  --radius-lg: 12px;    /* Standard cards */
  --radius-xl: 16px;    /* Larger panels & containers */
  --radius-full: 9999px;/* Pill buttons, avatars */

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.35);
  --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 12px 28px -4px rgba(0, 0, 0, 0.55);
  --shadow-surface: 0 20px 40px -15px rgba(0, 0, 0, 0.7);

  /* ----------------------------------------------------------------------------
     Motion Foundations
     ---------------------------------------------------------------------------- */
  --transition-fast: 150ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-base: 200ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 300ms cubic-bezier(0.16, 1, 0.3, 1);

  /* ----------------------------------------------------------------------------
     Component Compatibility Mapping (Bridges to Existing Markup)
     ---------------------------------------------------------------------------- */
  --bg-dark: var(--background);
  --bg-surface: var(--surface);
  --bg-panel: var(--surface-elevated);
  --text-main: var(--foreground);
  --text-muted: var(--foreground-muted);
  --text-strong: var(--foreground);

  --primary: var(--accent);
  --magenta: var(--accent);
  --accent-purple: var(--accent);
  --accent-violet: var(--accent);
  --accent-magenta: var(--accent);
  --blue-purple: var(--border-strong);

  --glass-bg: rgba(23, 26, 32, 0.7);
  --glass-bg-hover: rgba(32, 36, 44, 0.85);
  --glass-border: var(--border);
  --glass-border-hover: var(--border-strong);
  --glass-border-strong: var(--border-strong);

  --card-shadow: var(--shadow-md);
  --nav-bg: rgba(11, 13, 16, 0.85);

  --podium-grad-0: rgba(11, 13, 16, 0);
  --podium-grad-40: rgba(23, 26, 32, 0.85);
  --podium-grad-100: rgba(32, 36, 44, 0.95);
  --podium-hover-40: rgba(199, 243, 107, 0.04);
  --podium-hover-100: rgba(199, 243, 107, 0.08);
  --icon-shadow: rgba(0, 0, 0, 0.3);

  --btn-primary-bg: var(--accent);
  --btn-primary-text: var(--accent-foreground);
  --btn-primary-hover: var(--accent-hover);
  --btn-secondary-border: var(--border);
  --btn-secondary-text: var(--foreground);

  --input-bg: var(--surface);
  --input-border: var(--border);
  --input-focus: var(--surface-elevated);
  --form-success-bg: var(--surface);

  --logo-primary: var(--foreground);
  --logo-secondary: var(--foreground-muted);
  --logo-accent: var(--accent);
  --logo-muted: var(--foreground-subtle);

  --line-track: var(--border-subtle);
}

/* ==============================================================================
   2. LIGHT THEME OVERRIDES (Accessible & Contrast-Compliant)
   ============================================================================== */
[data-theme="light"] {
  --background: #F8F9FA;
  --surface: #FFFFFF;
  --surface-elevated: #F0F2F5;
  --accent: #2D6A1E;                 /* Forest/Olive green meeting WCAG AA (5.8:1 on #fff) */
  --accent-foreground: #FFFFFF;      /* Clean white on deep accent */
  --accent-hover: #225316;
  --accent-subtle: rgba(45, 106, 30, 0.08);
  --accent-muted: rgba(45, 106, 30, 0.16);

  --foreground: #0B0D10;             /* High contrast dark text (17.5:1) */
  --foreground-muted: #4B5563;       /* Contrast: 7.5:1 on white (WCAG AAA) */
  --foreground-subtle: #6B7280;      /* Contrast: 5.3:1 on white (WCAG AA) */

  --border: #E2E8F0;
  --border-strong: #CBD5E1;
  --border-subtle: rgba(0, 0, 0, 0.05);

  --success: #15803D;
  --success-subtle: rgba(21, 128, 61, 0.1);
  --error: #DC2626;
  --error-subtle: rgba(220, 38, 38, 0.1);

  --ring-focus: var(--accent);

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 12px 28px -4px rgba(0, 0, 0, 0.09);
  --shadow-surface: 0 20px 40px -15px rgba(0, 0, 0, 0.08);

  /* Component Compatibility Overrides */
  --bg-dark: var(--background);
  --bg-surface: var(--surface);
  --bg-panel: var(--surface-elevated);
  --text-main: var(--foreground);
  --text-muted: var(--foreground-muted);
  --text-strong: var(--foreground);

  --primary: var(--accent);
  --magenta: var(--accent);
  --accent-purple: var(--accent);
  --accent-violet: var(--accent);
  --accent-magenta: var(--accent);
  --blue-purple: var(--border-strong);

  --glass-bg: rgba(255, 255, 255, 0.85);
  --glass-bg-hover: rgba(240, 242, 245, 0.95);
  --glass-border: var(--border);
  --glass-border-hover: var(--border-strong);
  --glass-border-strong: var(--border-strong);
  --card-shadow: var(--shadow-md);
  --nav-bg: rgba(248, 249, 250, 0.88);

  --podium-grad-0: rgba(255, 255, 255, 0);
  --podium-grad-40: rgba(248, 249, 250, 0.9);
  --podium-grad-100: rgba(240, 242, 245, 1);
  --podium-hover-40: rgba(45, 106, 30, 0.03);
  --podium-hover-100: rgba(45, 106, 30, 0.06);
  --icon-shadow: rgba(0, 0, 0, 0.04);

  --btn-primary-bg: var(--accent);
  --btn-primary-text: var(--accent-foreground);
  --btn-primary-hover: var(--accent-hover);
  --btn-secondary-border: var(--border);
  --btn-secondary-text: var(--foreground);

  --input-bg: var(--surface);
  --input-border: var(--border);
  --input-focus: var(--surface-elevated);
  --form-success-bg: var(--surface);

  --logo-primary: var(--foreground);
  --logo-secondary: var(--foreground-muted);
  --logo-accent: var(--accent);
  --logo-muted: var(--foreground-subtle);

  --line-track: var(--border-subtle);
}

/* ==============================================================================
   3. GLOBAL BASELINE & ACCESSIBILITY STYLING
   ============================================================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background-color: var(--background);
  color: var(--foreground);
}

body {
  font-family: var(--font-body);
  background-color: var(--background);
  color: var(--foreground);
  line-height: var(--leading-relaxed);
  letter-spacing: var(--tracking-tight);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Clear Focus-Visible System */
:focus-visible {
  outline: 2px solid var(--ring-focus);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

/* High-Contrast Crisp Selection */
::selection {
  background-color: var(--accent);
  color: var(--accent-foreground);
}

::-moz-selection {
  background-color: var(--accent);
  color: var(--accent-foreground);
}

/* Restrained, Minimal Scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--background);
}

::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--foreground-subtle);
}

/* Full Accessibility: User Reduced-Motion Preference */
@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;
  }
}

/* ==============================================================================
   4. REUSABLE TYPOGRAPHY CLASSES
   ============================================================================== */
.text-display {
  font-family: var(--font-display);
  font-size: var(--text-display);
  line-height: var(--leading-tight);
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--tracking-tighter);
  color: var(--foreground);
}

.text-section {
  font-family: var(--font-display);
  font-size: var(--text-section);
  line-height: var(--leading-snug);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--tracking-tight);
  color: var(--foreground);
}

.text-card {
  font-family: var(--font-display);
  font-size: var(--text-card);
  line-height: var(--leading-snug);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--tracking-tight);
  color: var(--foreground);
}

.text-body {
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: var(--leading-relaxed);
  font-weight: var(--font-weight-regular);
  color: var(--foreground);
}

.text-secondary {
  font-family: var(--font-body);
  font-size: var(--text-secondary);
  line-height: var(--leading-normal);
  font-weight: var(--font-weight-regular);
  color: var(--foreground-muted);
}

.text-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-eyebrow);
  line-height: var(--leading-none);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--accent);
}

.text-meta {
  font-family: var(--font-mono);
  font-size: var(--text-meta);
  line-height: var(--leading-snug);
  font-weight: var(--font-weight-regular);
  color: var(--foreground-subtle);
}

.font-mono {
  font-family: var(--font-mono);
}

.font-display {
  font-family: var(--font-display);
}

.font-body {
  font-family: var(--font-body);
}

/* ==============================================================================
   5. REUSABLE CONTAINER & LAYOUT UTILITIES
   ============================================================================== */
.container,
.page-container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

/* ==============================================================================
   6. REUSABLE SURFACE & BORDER UTILITIES
   ============================================================================== */
.surface-base {
  background-color: var(--background);
}

.surface-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.surface-elevated {
  background-color: var(--surface-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
}

.border-default {
  border-color: var(--border);
}

.border-strong {
  border-color: var(--border-strong);
}

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

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

.badge-status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: var(--text-meta);
  font-weight: var(--font-weight-medium);
  background-color: var(--surface);
  border: 1px solid var(--border);
  color: var(--foreground);
}

.badge-status.is-active {
  border-color: rgba(199, 243, 107, 0.3);
  color: var(--accent);
  background-color: var(--accent-subtle);
}

/* ==============================================================================
   7. SHARED UI COMPONENT STYLES
   ============================================================================== */
/* Shared Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  background-color: var(--accent);
  color: var(--accent-foreground);
  border: 1px solid var(--accent);
  border-radius: var(--radius-full);
  padding: 0.75rem 1.75rem;
  font-family: var(--font-body);
  font-size: var(--text-secondary);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: 0 4px 14px -2px rgba(199, 243, 107, 0.25);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px -2px rgba(199, 243, 107, 0.35);
}

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

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  background-color: var(--surface);
  color: var(--foreground);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 0.75rem 1.75rem;
  font-family: var(--font-body);
  font-size: var(--text-secondary);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-base);
}

.btn-secondary:hover {
  background-color: var(--surface-elevated);
  border-color: var(--border-strong);
  color: var(--foreground);
  transform: translateY(-2px);
}

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

[data-theme="light"] .btn-primary {
  box-shadow: 0 4px 14px -2px rgba(45, 106, 30, 0.2);
}

[data-theme="light"] .btn-primary:hover {
  box-shadow: 0 8px 20px -2px rgba(45, 106, 30, 0.25);
}

/* Shared Cards & Panels */
.ui-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

.ui-card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

/* Shared Badges & Tech Pills */
.ui-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.375rem 0.75rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-meta);
  font-weight: var(--font-weight-medium);
  background-color: var(--surface);
  border: 1px solid var(--border);
  color: var(--foreground);
  transition: all var(--transition-fast);
}

.ui-badge:hover {
  background-color: var(--surface-elevated);
  border-color: var(--border-strong);
}

.ui-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: var(--text-meta);
  font-weight: var(--font-weight-medium);
  background-color: var(--surface-elevated);
  border: 1px solid var(--border);
  color: var(--foreground-muted);
}