/* =============================================
   TONARHA — Global Styles
   main.css: variables, reset, base typography
   ============================================= */

/* ===== CSS Custom Properties ===== */
:root {
  /* Colors */
  --color-bg:           #0A0A0A;
  --color-surface:      #111111;
  --color-surface-alt:  #141414;
  --color-orange:       #FF6500;
  --color-orange-hover: #FF8C00;
  --color-orange-dim:   rgba(255, 101, 0, 0.12);
  --color-text:         #F2F2F2;
  --color-text-muted:   #888888;
  --color-border:       #222222;
  --color-border-accent:#FF6500;

  /* Typography */
  --font-mono: 'Space Mono', monospace;
  --font-body: 'Inter', sans-serif;

  /* Spacing scale */
  --sp-xs:  0.5rem;   /*  8px */
  --sp-sm:  1rem;     /* 16px */
  --sp-md:  2rem;     /* 32px */
  --sp-lg:  4rem;     /* 64px */
  --sp-xl:  6rem;     /* 96px */
  --sp-2xl: 8rem;     /* 128px */

  /* Layout */
  --max-width:        1200px;
  --container-px:     1.5rem;

  /* Borders */
  --border-default:   2px solid var(--color-border);
  --border-accent:    2px solid var(--color-orange);

  /* Transitions */
  --t-fast:   all 0.15s ease;
  --t-medium: all 0.3s ease;
  --t-slow:   all 0.6s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

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

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

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

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

ul, ol {
  list-style: none;
}

/* ===== Background Grid Pattern ===== */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 101, 0, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 101, 0, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
}

main, nav, footer {
  position: relative;
  z-index: 1;
}

/* ===== Base Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-mono);
  line-height: 1.15;
  font-weight: 700;
}

p {
  font-family: var(--font-body);
  line-height: 1.75;
  color: var(--color-text-muted);
}

/* ===== Layout Utilities ===== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--container-px);
}

.section {
  padding: var(--sp-xl) 0;
}

/* ===== Section Header Pattern ===== */
.section-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-orange);
  margin-bottom: var(--sp-xs);
}

.section-title {
  font-family: var(--font-mono);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  color: var(--color-text);
  margin-bottom: var(--sp-sm);
}

.section-rule {
  width: 40px;
  height: 2px;
  background-color: var(--color-orange);
  margin-bottom: var(--sp-md);
}

.section-subtitle {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 560px;
  margin-bottom: var(--sp-lg);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: var(--border-accent);
  transition: var(--t-fast);
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-orange);
  color: #000000;
  box-shadow: 3px 3px 0 rgba(255, 101, 0, 0.35);
}

.btn-primary:hover {
  background-color: var(--color-orange-hover);
  box-shadow: 5px 5px 0 rgba(255, 101, 0, 0.35);
  transform: translate(-1px, -1px);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-orange);
  box-shadow: 3px 3px 0 var(--color-orange);
}

.btn-secondary:hover {
  background-color: var(--color-orange-dim);
  box-shadow: 5px 5px 0 var(--color-orange);
  transform: translate(-1px, -1px);
}

/* ===== Tag Pill ===== */
.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-orange);
  border: 1px solid var(--color-orange);
  padding: 0.2rem 0.55rem;
}

/* ===== Card Base ===== */
.card {
  background-color: var(--color-surface);
  border: var(--border-default);
  padding: var(--sp-md);
  transition: var(--t-medium);
}

.card:hover {
  border-color: var(--color-orange);
  box-shadow: 0 0 0 1px var(--color-orange), 4px 4px 0 rgba(255, 101, 0, 0.2);
}

/* ===== Scroll Fade-in Animation ===== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }

/* ===== Scroll offset for fixed nav ===== */
section[id] {
  scroll-margin-top: 80px;
}

/* ===== Custom scrollbar (webkit) ===== */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--color-bg);
}
::-webkit-scrollbar-thumb {
  background: var(--color-border);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-orange);
}

/* ===== Selection highlight ===== */
::selection {
  background-color: var(--color-orange);
  color: #000;
}

/* ===== Alternating section backgrounds for rhythm ===== */
#cases,
#contact {
  background-color: #0D0D0D;
}

/* ===== Responsive Breakpoints ===== */
@media (max-width: 1023px) {
  :root {
    --sp-xl: 4.5rem;
    --container-px: 1.25rem;
  }
}

@media (max-width: 767px) {
  :root {
    --sp-xl: 3.5rem;
    --sp-lg: 2.5rem;
    --container-px: 1rem;
  }
}