/*
 * base.css — Reset, Typography, Global
 * rizvee.github.io | Hasan Rizvee Portfolio
 * ==========================================
 */

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg-void);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

input, button, textarea, select {
  font: inherit;
}

p, h1, h2, h3, h4, h5, h6 {
  overflow-wrap: break-word;
}

ol, ul {
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  cursor: pointer;
  background: none;
  border: none;
}

/* ── Skip to content (accessibility) ────────── */
.skip-link {
  position: fixed;
  top: -100%;
  left: var(--space-4);
  z-index: 9999;
  padding: var(--space-3) var(--space-6);
  background: var(--accent);
  color: var(--bg-void);
  font-weight: 700;
  border-radius: var(--radius);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
}

/* ── Typography Scale ─────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

/* Display — hero name */
.text-display {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.8rem, 8vw, 7rem);
  line-height: 1.0;
  letter-spacing: -0.03em;
}

/* Headline — section titles */
.text-headline {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.75rem, 3vw, 2.75rem);
  line-height: 1.18;
  letter-spacing: -0.025em;
}

/* Sub-headline — card titles, case study headers */
.text-subheadline {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  line-height: 1.3;
}

/* Eyebrow / section label — mono small caps */
.text-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

/* Body */
.text-body {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-secondary);
}

/* Lead — hero sub-copy */
.text-lead {
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  line-height: 1.7;
  color: var(--text-secondary);
}

/* Caption / metadata */
.text-caption {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

/* ── Selection ────────────────────────────── */
::selection {
  background-color: var(--accent-dim);
  color: var(--accent);
}

/* ── Focus styles ─────────────────────────── */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ── Scroll reveal — progressive enhancement ── */
/* Visible by default if JS is disabled */
.reveal {
  opacity: 1;
  transform: none;
}

/* Hidden initial state when JS is running */
.js .reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-reveal), transform var(--transition-reveal);
}

.js .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 80ms; }
.reveal-delay-2 { transition-delay: 160ms; }
.reveal-delay-3 { transition-delay: 240ms; }
.reveal-delay-4 { transition-delay: 320ms; }
.reveal-delay-5 { transition-delay: 400ms; }