/* ================================================================
   base.css — Design tokens, reset, shared utilities
   This file is the single source of truth for colors, fonts,
   spacing, and any class used across multiple sections.
   ================================================================ */


/* ── DESIGN TOKENS ── */
:root {
  /* Colors */
  --navy:        #0A0F1E;   /* page background */
  --navy-2:      #111827;   /* alternate section background */
  --navy-3:      #1C2539;   /* card background */
  --navy-4:      #243050;   /* card hover / deeper accent */
  --indigo:      #6366F1;   /* primary accent */
  --indigo-dim:  #4F52C4;   /* darker indigo (hover states) */
  --indigo-glow: #818CF8;   /* lighter indigo (text on dark) */
  --cream:       #F0EDE8;   /* primary text */
  --slate:       #94A3B8;   /* secondary text */
  --slate-dim:   #64748B;   /* muted text */
  --white:       #FFFFFF;
  --green:       #10B981;   /* success / available badge */
  --red:         #F43F5E;   /* danger */
  --amber:       #F59E0B;   /* certifications / warnings */

  /* Border radius */
  --radius-sm:  6px;
  --radius:     12px;
  --radius-lg:  20px;
}


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


/* ── BASE ── */
html {
  scroll-behavior: smooth;
}

body {
  background: var(--navy);
  color: var(--cream);
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}


/* ── SHARED SECTION LAYOUT ── */
section {
  padding: 100px 5vw;
}

/* Alternating background for visual rhythm between sections */
#projects,
#education {
  background: var(--navy-2);
}

#experience,
#skills,
#contact {
  background: var(--navy);
}

#about {
  background: var(--navy-2);
}


/* ── SHARED SECTION HEADER ── */
/* Used at the top of every section */
.section-header {
  margin-bottom: 56px;
}

.section-eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px;
  color: var(--indigo-glow);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 12px;
}

.section-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  color: var(--white);
  letter-spacing: -1px;
  line-height: 1.1;
}

/* Colored underline bar beneath section title */
.section-line {
  display: block;
  width: 48px;
  height: 3px;
  background: linear-gradient(90deg, var(--indigo), var(--green));
  border-radius: 2px;
  margin-top: 16px;
}


/* ── SHARED BUTTON STYLES ── */
/* Used in hero and potentially elsewhere */
.btn {
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  font-weight: 500;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-primary {
  background: var(--indigo);
  color: #fff;
}
.btn-primary:hover {
  background: var(--indigo-glow);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.35);
}

.btn-ghost {
  background: transparent;
  color: var(--cream);
  border: 1px solid rgba(240, 237, 232, 0.2);
}
.btn-ghost:hover {
  border-color: rgba(240, 237, 232, 0.5);
  transform: translateY(-2px);
}


/* ── SCROLL ANIMATION ── */
/* Elements start invisible; js/animations.js adds .visible when they enter view */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}


/* ── FOOTER ── */
footer {
  padding: 28px 5vw;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
footer p {
  font-size: 13px;
  color: var(--slate-dim);
}
footer a {
  color: var(--indigo-glow);
  text-decoration: none;
}


/* ── REDUCED MOTION ── */
/* Disables all transitions/animations for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }
  .fade-up {
    opacity: 1;
    transform: none;
  }
}


/* ── MOBILE SHARED ── */
@media (max-width: 768px) {
  section {
    padding: 72px 5vw;
  }
  footer {
    flex-direction: column;
    text-align: center;
  }
}