/* ==========================================================================
   AJAY UPADHYAY STUDIO — DESIGN SYSTEM & TOKENS
   Concept: "The Technical Broadsheet & Production Ledger"
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=JetBrains+Mono:ital,wght@0,400;0,500;0,600;1,400&family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap');

:root {
  /* Colors: Obsidian & Warm Newsprint System */
  --color-bg-root: #0D0F12;
  --color-bg-surface: #14171D;
  --color-bg-subtle: #1A1E26;
  --color-bg-elevated: #222732;
  
  --color-text-primary: #F3F1EC;
  --color-text-muted: #9B9FA8;
  --color-text-subtle: #616670;
  
  --color-border-hairline: rgba(243, 241, 236, 0.11);
  --color-border-medium: rgba(243, 241, 236, 0.22);
  --color-border-focus: #D95A2B;
  
  --color-accent: #D95A2B;             /* Industrial Signal Ochre */
  --color-accent-hover: #E86B3C;
  --color-accent-soft: rgba(217, 90, 43, 0.12);
  --color-accent-glow: rgba(217, 90, 43, 0.25);
  
  --color-signal-green: #2ECC71;        /* Operational pulse */
  --color-signal-green-soft: rgba(46, 204, 113, 0.15);

  /* Contrast Paper Band (Editorial Inset) */
  --color-paper-bg: #FAF8F5;
  --color-paper-ink: #121418;
  --color-paper-muted: #5A5E68;
  --color-paper-border: rgba(18, 20, 24, 0.12);
  --color-paper-subtle: #ECE8DF;

  /* Typography Families */
  --font-editorial: 'Instrument Serif', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Menlo, Monaco, Consolas, monospace;

  /* Typography Scales (Fluid Clamps) */
  --text-display-xl: clamp(2.5rem, 5.5vw, 4.5rem);
  --text-display-lg: clamp(2rem, 4vw, 3.25rem);
  --text-h2: clamp(1.65rem, 2.75vw, 2.25rem);
  --text-h3: clamp(1.25rem, 1.8vw, 1.5rem);
  --text-body: 1.0625rem;       /* 17px */
  --text-body-sm: 0.9375rem;    /* 15px */
  --text-meta: 0.8125rem;       /* 13px */
  --text-mono-xs: 0.75rem;      /* 12px */

  /* Layout & Spacing */
  --canvas-max-width: 1360px;
  --gutter-x: clamp(1.25rem, 4vw, 3.5rem);
  --section-spacing-y: clamp(5rem, 9vw, 9rem);
  --card-radius: 2px;          /* Minimalist architectural precision */
  --pill-radius: 9999px;

  /* Transitions */
  --ease-editorial: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 0.2s var(--ease-editorial);
  --transition-normal: 0.35s var(--ease-editorial);
  --transition-slow: 0.6s var(--ease-editorial);
}

/* ==========================================================================
   CSS Reset & Base Rules
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  background-color: var(--color-bg-root);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  background-color: var(--color-bg-root);
  color: var(--color-text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* Subtle architectural grid texture */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
}

img, svg, picture, video {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

button, input, textarea, select {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}

button {
  cursor: pointer;
}

ul, ol {
  list-style: none;
}

/* ==========================================================================
   Layout Containers & Architectural Hairlines
   ========================================================================== */

.canvas-container {
  width: 100%;
  max-width: var(--canvas-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--gutter-x);
  padding-right: var(--gutter-x);
  position: relative;
  z-index: 1;
}

.hairline-top {
  border-top: 1px solid var(--color-border-hairline);
}

.hairline-bottom {
  border-bottom: 1px solid var(--color-border-hairline);
}

.hairline-left {
  border-left: 1px solid var(--color-border-hairline);
}

.hairline-right {
  border-right: 1px solid var(--color-border-hairline);
}

.hairline-box {
  border: 1px solid var(--color-border-hairline);
}

/* ==========================================================================
   Typography Utilities
   ========================================================================== */

.font-editorial {
  font-family: var(--font-editorial);
  font-weight: 400;
  letter-spacing: -0.015em;
  line-height: 1.15;
}

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

.font-mono {
  font-family: var(--font-mono);
  letter-spacing: -0.01em;
}

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

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

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

.telemetry-tag {
  font-family: var(--font-mono);
  font-size: var(--text-mono-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-subtle);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.section-label {
  font-family: var(--font-mono);
  font-size: var(--text-mono-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.section-label::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 1px;
  background-color: var(--color-accent);
}

/* ==========================================================================
   Buttons, Badges & Interactive Controls
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  padding: 0.75rem 1.35rem;
  font-family: var(--font-mono);
  font-size: var(--text-meta);
  font-weight: 500;
  letter-spacing: 0.02em;
  border-radius: var(--card-radius);
  transition: all var(--transition-normal);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-accent);
  color: #FFFFFF;
  border: 1px solid var(--color-accent);
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px var(--color-accent-glow);
}

.btn-secondary {
  background-color: var(--color-bg-surface);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-hairline);
}

.btn-secondary:hover {
  background-color: var(--color-bg-subtle);
  border-color: var(--color-border-medium);
  color: #FFFFFF;
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-hairline);
}

.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn-whatsapp {
  background: rgba(37, 211, 102, 0.12);
  color: #25D366;
  border: 1px solid rgba(37, 211, 102, 0.28);
}

.btn-whatsapp:hover {
  background: #25D366;
  color: #0A120D;
  border-color: #25D366;
  box-shadow: 0 4px 16px rgba(37, 211, 102, 0.3);
}

.tag-pill {
  font-family: var(--font-mono);
  font-size: var(--text-mono-xs);
  padding: 0.25rem 0.625rem;
  background-color: var(--color-bg-subtle);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border-hairline);
  border-radius: 2px;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.tag-pill.active {
  background-color: var(--color-accent-soft);
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* Status Indicator Pulse */
.status-pulse {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--color-signal-green);
  position: relative;
}

.status-pulse::after {
  content: "";
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  border: 1px solid var(--color-signal-green);
  animation: pulse-wave 2.2s cubic-bezier(0.24, 0, 0.38, 1) infinite;
}

@keyframes pulse-wave {
  0% {
    transform: scale(0.8);
    opacity: 0.9;
  }
  70% {
    transform: scale(2.2);
    opacity: 0;
  }
  100% {
    transform: scale(2.2);
    opacity: 0;
  }
}

/* ==========================================================================
   Editorial Contrast Band (.paper-band)
   ========================================================================== */

.paper-band {
  background-color: var(--color-paper-bg);
  color: var(--color-paper-ink);
  position: relative;
  overflow: hidden;
}

.paper-band .text-muted {
  color: var(--color-paper-muted);
}

.paper-band .hairline-top,
.paper-band .hairline-bottom,
.paper-band .hairline-left,
.paper-band .hairline-right {
  border-color: var(--color-paper-border);
}

/* Accessibility */
@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;
  }
}