/* ============================================================
   PORTFOLIO — Aisha Adam Opaluwa
   styles.css
   ============================================================
   To customise: change CSS variables in :root only.
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }

/* ── DARK THEME (default) ── */
:root {
  --bg:            #0a0a0f;
  --bg-2:          #111118;
  --bg-3:          #18181f;
  --bg-4:          #1e1e27;
  --border:        rgba(255,255,255,0.07);
  --border-bright: rgba(255,255,255,0.14);
  --text:          #e8e8f0;
  --text-2:        #9898aa;
  --text-3:        #5a5a6e;
  --accent:        #7c6aff;
  --accent-2:      #a594ff;
  --accent-dim:    rgba(124,106,255,0.12);
  --accent-border: rgba(124,106,255,0.3);
  --green:         #3ecf8e;
  --green-dim:     rgba(62,207,142,0.1);
  --nav-bg:        rgba(10,10,15,0.88);
}

/* ── LIGHT THEME ── */
[data-theme="light"] {
  --bg:            #f5f4f0;
  --bg-2:          #edece8;
  --bg-3:          #e4e2da;
  --bg-4:          #d8d6ce;
  --border:        rgba(0,0,0,0.08);
  --border-bright: rgba(0,0,0,0.16);
  --text:          #131215;
  --text-2:        #4a4858;
  --text-3:        #8a88a0;
  --accent:        #5b48e8;
  --accent-2:      #7060f0;
  --accent-dim:    rgba(91,72,232,0.1);
  --accent-border: rgba(91,72,232,0.28);
  --green:         #1a9e65;
  --green-dim:     rgba(26,158,101,0.1);
  --nav-bg:        rgba(245,244,240,0.92);
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
  transition: background 0.35s, color 0.35s;
}

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

::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-bright); border-radius: 2px; }

/* ── NAV ── */
#nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  display: flex; justify-content: space-between; align-items: center;
  padding: 1.1rem 3rem;
  background: var(--nav-bg);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: padding 0.3s, background 0.35s;
  isolation: isolate;
}
.nav-logo { font-family: 'Space Mono', monospace; font-size: 0.85rem; letter-spacing: 0.05em; color: var(--text-2); }
.nav-logo span { color: var(--accent-2); }
.nav-links { display: flex; gap: 2.5rem; list-style: none; }
.nav-links a { font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-3); font-weight: 500; transition: color 0.2s; }
.nav-links a:hover { color: var(--text); }
.nav-right { display: flex; align-items: center; gap: 1rem; }
.nav-cta { font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; padding: 0.45rem 1.1rem; border: 1px solid var(--accent-border); color: var(--accent-2); font-weight: 500; transition: all 0.2s; }
.nav-cta:hover { background: var(--accent-dim); }
.nav-resume {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.45rem 1.1rem;
  border: 1px solid var(--border-bright);
  color: var(--text-2); font-weight: 500;
  transition: all 0.2s;
}
.nav-resume:hover {
  border-color: var(--accent-border);
  color: var(--accent-2);
  background: var(--accent-dim);
}

/* theme toggle pill */
.theme-toggle {
  width: 40px; height: 22px;
  background: var(--bg-4);
  border: 1px solid var(--border-bright);
  border-radius: 11px;
  cursor: pointer;
  position: relative;
  transition: background 0.3s, border-color 0.3s;
  flex-shrink: 0;
}
.theme-toggle::after {
  content: '';
  position: absolute;
  left: 3px; top: 3px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--accent-2);
  transition: transform 0.3s;
}
[data-theme="light"] .theme-toggle::after { transform: translateX(18px); }

/* ── HERO ── */
#hero { min-height: 100vh; display: flex; flex-direction: column; justify-content: center; padding: 8rem 3rem 5rem; position: relative; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1fr 380px; gap: 5rem; align-items: center; max-width: 1200px; }
.hero-tag { display: inline-flex; align-items: center; gap: 0.6rem; font-family: 'Space Mono', monospace; font-size: 0.7rem; letter-spacing: 0.15em; text-transform: uppercase; color: var(--accent-2); margin-bottom: 1.75rem; }
.hero-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--green); animation: blink 2s infinite; }
@keyframes blink { 0%,100%{ opacity:1; } 50%{ opacity:0.35; } }

h1 { font-family: 'Instrument Serif', serif; font-size: clamp(3.5rem, 6vw, 6rem); line-height: 1.0; letter-spacing: -0.03em; color: var(--text); margin-bottom: 1.75rem; }
h1 em { font-style: italic; color: var(--accent-2); }
.hero-desc { font-size: 1rem; color: var(--text-2); max-width: 52ch; line-height: 1.85; margin-bottom: 2.5rem; }
.hero-ctas { display: flex; gap: 1rem; flex-wrap: wrap; }

.btn { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.7rem 1.4rem; font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 500; font-family: 'Space Grotesk', sans-serif; transition: all 0.22s; cursor: pointer; border: 1px solid transparent; }
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: var(--accent-2); }
.btn-ghost { border-color: var(--border-bright); color: var(--text-2); }
.btn-ghost:hover { border-color: var(--accent-border); color: var(--text); background: var(--accent-dim); }

.hero-card { background: var(--bg-3); border: 1px solid var(--border); padding: 2rem; display: flex; flex-direction: column; gap: 1.5rem; transition: background 0.35s, border-color 0.35s; }
.stat-val { font-family: 'Instrument Serif', serif; font-size: 2.2rem; line-height: 1; color: var(--text); margin-bottom: 0.25rem; }
.stat-label { font-size: 0.72rem; color: var(--text-3); letter-spacing: 0.06em; text-transform: uppercase; }
.hero-divider { height: 1px; background: var(--border); }
.open-to-label { font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-3); margin-bottom: 0.75rem; }
.open-to-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.open-tag { font-size: 0.68rem; padding: 0.3rem 0.7rem; border: 1px solid var(--accent-border); color: var(--accent-2); background: var(--accent-dim); letter-spacing: 0.04em; }

.bg-grid { position: absolute; inset: 0; z-index: -1; background-image: linear-gradient(var(--border) 1px, transparent 1px), linear-gradient(90deg, var(--border) 1px, transparent 1px); background-size: 80px 80px; }
.bg-glow { position: absolute; top: -200px; right: -200px; z-index: -1; width: 600px; height: 600px; border-radius: 50%; background: radial-gradient(circle, var(--accent-dim) 0%, transparent 70%); }

/* ── SECTIONS ── */
.section-wrap { border-top: 1px solid var(--border); }
section { padding: 6rem 3rem; max-width: 1200px; margin: 0 auto; }
.section-label { display: flex; align-items: center; gap: 1rem; margin-bottom: 3rem; }
.section-num { font-family: 'Space Mono', monospace; font-size: 0.65rem; color: var(--accent-2); letter-spacing: 0.1em; }
h2 { font-family: 'Instrument Serif', serif; font-size: clamp(2rem, 4vw, 3rem); letter-spacing: -0.03em; line-height: 1.1; }
.section-rule { flex: 1; height: 1px; background: var(--border); }

/* ── ABOUT ── */
.about-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 5rem; align-items: start; }
.about-text p { font-size: 0.95rem; color: var(--text-2); line-height: 1.9; margin-bottom: 1.25rem; }
.about-text strong { color: var(--text); font-weight: 500; }
.about-aside { display: flex; flex-direction: column; gap: 1.25rem; }
.info-card { background: var(--bg-3); border: 1px solid var(--border); padding: 1.25rem 1.5rem; transition: background 0.35s, border-color 0.35s; }
.info-card-label { font-size: 0.62rem; letter-spacing: 0.15em; text-transform: uppercase; color: var(--accent-2); margin-bottom: 0.75rem; font-weight: 500; }
.info-card p, .info-card a { font-size: 0.82rem; color: var(--text-2); line-height: 1.7; }
.info-card a { color: var(--accent-2); transition: color 0.2s; }
.info-card a:hover { color: var(--text); }
.info-card strong { color: var(--text); }

/* ── PROJECTS ── */
.projects-outer { border-top: 1px solid var(--border); }
#projects-header { padding: 6rem 3rem 0; max-width: 1200px; margin: 0 auto; }

/* filter bar */
.filter-bar { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 2rem; }
.filter-btn {
  font-family: 'Space Mono', monospace;
  font-size: 0.63rem; letter-spacing: 0.1em; text-transform: uppercase;
  padding: 0.38rem 1rem;
  border: 1px solid var(--border-bright);
  color: var(--text-3); background: transparent;
  cursor: pointer; border-radius: 20px;
  transition: all 0.2s;
}
.filter-btn:hover { border-color: var(--accent-border); color: var(--accent-2); }
.filter-btn.active { background: var(--accent-dim); border-color: var(--accent-border); color: var(--accent-2); }

.projects-container { display: flex; flex-direction: column; gap: 1px; background: var(--border); margin-top: 2rem; }

/* featured */
.project-featured { display: grid; grid-template-columns: 1fr 1fr; background: var(--bg-2); min-height: 420px; transition: background 0.3s; }
.project-featured:hover { background: var(--bg-3); }
.project-featured-content { padding: 3rem; border-right: 1px solid var(--border); }
.project-featured-preview { display: flex; align-items: center; justify-content: center; padding: 2rem; overflow: hidden; position: relative; }

/* rows */
.projects-row { display: grid; background: var(--border); gap: 1px; }
.projects-row-2 { grid-template-columns: repeat(2, 1fr); }
.projects-row-3 { grid-template-columns: repeat(3, 1fr); }

.project-card { background: var(--bg-2); padding: 2.25rem; position: relative; overflow: hidden; transition: background 0.3s; display: flex; flex-direction: column; }
.project-card:hover { background: var(--bg-3); }

/* filter animation */
.proj-item { transition: opacity 0.35s ease, transform 0.35s ease; }
.proj-item.proj-hidden { opacity: 0; pointer-events: none; position: absolute; visibility: hidden; }
.proj-item.proj-visible { opacity: 1; }
.row-hidden { display: none; }

.proj-category { font-family: 'Space Mono', monospace; font-size: 0.62rem; letter-spacing: 0.15em; text-transform: uppercase; color: var(--accent-2); margin-bottom: 1rem; }
.proj-title { font-family: 'Instrument Serif', serif; font-size: 1.5rem; line-height: 1.2; letter-spacing: -0.02em; color: var(--text); margin-bottom: 0.5rem; }
.project-featured-content .proj-title { font-size: 2.2rem; }
.proj-subtitle { font-size: 0.75rem; color: var(--text-3); margin-bottom: 1.25rem; letter-spacing: 0.04em; }
.proj-desc { font-size: 0.85rem; color: var(--text-2); line-height: 1.85; margin-bottom: 1.5rem; }
.proj-highlights { list-style: none; margin-bottom: 1.5rem; display: flex; flex-direction: column; gap: 0.5rem; flex: 1; }
.proj-highlights li { font-size: 0.78rem; color: var(--text-3); padding-left: 1.1rem; position: relative; line-height: 1.6; }
.proj-highlights li::before { content: '→'; position: absolute; left: 0; color: var(--accent); font-size: 0.7rem; }
.proj-stack { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1.5rem; }
.stack-tag { font-size: 0.62rem; letter-spacing: 0.06em; padding: 0.25rem 0.6rem; border: 1px solid var(--border-bright); color: var(--text-3); background: var(--bg-4); transition: background 0.35s, border-color 0.35s; }
.proj-links { display: flex; gap: 0.6rem; flex-wrap: wrap; margin-top: auto; }
.proj-link { display: inline-flex; align-items: center; gap: 0.35rem; font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase; padding: 0.4rem 0.9rem; font-weight: 500; border: 1px solid var(--border-bright); color: var(--text-2); transition: all 0.2s; }
.proj-link:hover { border-color: var(--accent-border); color: var(--accent-2); background: var(--accent-dim); }
.proj-link.live { border-color: var(--accent-border); color: var(--accent-2); }
.proj-link.live:hover { background: var(--accent); color: white; border-color: var(--accent); }
.proj-year { position: absolute; bottom: 1.5rem; right: 2rem; font-family: 'Space Mono', monospace; font-size: 0.62rem; color: var(--text-3); letter-spacing: 0.1em; }

.preview-placeholder { width: 100%; height: 100%; min-height: 300px; display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 1rem; background: var(--bg-4); border: 1px dashed var(--border-bright); color: var(--text-3); font-size: 0.75rem; text-align: center; letter-spacing: 0.06em; transition: background 0.35s; }
.preview-placeholder svg { opacity: 0.3; }
.preview-img { width: 100%; height: 100%; object-fit: cover; }
.preview-frame { width: 100%; min-height: 340px; border: 1px solid var(--border-bright); background: white; pointer-events: none; border-radius: 4px; }
.preview-label { position: absolute; top: 1rem; right: 1rem; font-size: 0.6rem; letter-spacing: 0.1em; text-transform: uppercase; padding: 0.25rem 0.6rem; background: var(--green-dim); border: 1px solid rgba(62,207,142,0.25); color: var(--green); }

/* ── EXPERIENCE ── */
.exp-wrap { background: var(--bg-2); border-top: 1px solid var(--border); padding: 6rem 3rem; transition: background 0.35s; }
.exp-inner { max-width: 1200px; margin: 0 auto; }
.exp-item { display: grid; grid-template-columns: 180px 1fr; gap: 3rem; padding: 2rem 0; border-bottom: 1px solid var(--border); }
.exp-item:first-child { padding-top: 0; }
.exp-period { font-family: 'Space Mono', monospace; font-size: 0.68rem; color: var(--accent-2); letter-spacing: 0.06em; margin-bottom: 0.3rem; }
.exp-org { font-size: 0.78rem; color: var(--text-3); }
.exp-role { font-size: 1rem; font-weight: 500; color: var(--text); margin-bottom: 0.75rem; }
.exp-desc { font-size: 0.83rem; color: var(--text-2); line-height: 1.85; }
.exp-desc ul { list-style: none; display: flex; flex-direction: column; gap: 0.35rem; margin-top: 0.5rem; }
.exp-desc ul li { padding-left: 1rem; position: relative; }
.exp-desc ul li::before { content: '—'; position: absolute; left: 0; color: var(--border-bright); }

/* ── SKILLS ── */
.skills-wrap { border-top: 1px solid var(--border); }
#skills { padding-bottom: 0; }
.skills-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--border); }
.skill-group { background: var(--bg-2); padding: 2rem; transition: background 0.35s; }
.skill-group-label { font-family: 'Space Mono', monospace; font-size: 0.62rem; letter-spacing: 0.15em; text-transform: uppercase; color: var(--accent-2); margin-bottom: 1.25rem; padding-bottom: 0.75rem; border-bottom: 1px solid var(--border); }
.skill-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.skill-tag { font-size: 0.72rem; padding: 0.3rem 0.7rem; background: var(--bg-4); border: 1px solid var(--border); color: var(--text-2); transition: background 0.35s, border-color 0.35s; }

/* ── CONTACT ── */
.contact-wrap { background: var(--bg-2); border-top: 1px solid var(--border); padding: 6rem 3rem; transition: background 0.35s; }
.contact-inner { max-width: 1200px; margin: 0 auto; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 5rem; align-items: start; margin-top: 3rem; }
.contact-text p { font-size: 0.95rem; color: var(--text-2); line-height: 1.9; margin-bottom: 1rem; }
.contact-links { display: flex; flex-direction: column; gap: 0.75rem; }
.contact-link { display: flex; align-items: center; justify-content: space-between; padding: 1rem 1.25rem; border: 1px solid var(--border); color: var(--text-2); font-size: 0.85rem; transition: all 0.22s; }
.contact-link:hover { border-color: var(--accent-border); background: var(--accent-dim); color: var(--text); }
.cl-meta { display: flex; flex-direction: column; }
.cl-type { font-size: 0.62rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-3); margin-bottom: 0.15rem; }
.cl-val { font-size: 0.85rem; }
.cl-arrow { color: var(--text-3); transition: color 0.2s; }
.contact-link:hover .cl-arrow { color: var(--accent-2); }

footer { text-align: center; padding: 1.5rem 3rem; border-top: 1px solid var(--border); font-family: 'Space Mono', monospace; font-size: 0.65rem; color: var(--text-3); letter-spacing: 0.08em; background: var(--bg); transition: background 0.35s; }

/* ── SCROLL ANIMATIONS ── */
.fade-in { opacity: 0; transform: translateY(28px); transition: opacity 0.65s ease, transform 0.65s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }
.fade-in-d1 { transition-delay: 0.1s; }
.fade-in-d2 { transition-delay: 0.2s; }
.fade-in-d3 { transition-delay: 0.3s; }

/* hero load animations */
.ha { opacity: 0; transform: translateY(18px); animation: ha 0.75s ease forwards; }
.ha-1 { animation-delay: 0.05s; }
.ha-2 { animation-delay: 0.2s; }
.ha-3 { animation-delay: 0.35s; }
.ha-4 { animation-delay: 0.5s; }
.ha-5 { animation-delay: 0.65s; }
@keyframes ha { to { opacity: 1; transform: none; } }

/* hamburger — hidden on desktop */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px; height: 36px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
  z-index: 201;
}
.hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text-2);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── RESPONSIVE ── */
@media (max-width: 960px) {
  #nav { padding: 1rem 1.5rem; }

  .nav-links {
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--bg);
    justify-content: center;
    align-items: center;
    gap: 2.5rem;
    transform: translateX(100%);
    transition: transform 0.35s ease;
    z-index: 300;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links a { font-size: 1.2rem; letter-spacing: 0.1em; }

  .hamburger {
    display: flex;
    position: relative;
    z-index: 301;
    margin-left: auto;
  }

  section, #projects-header { padding-left: 1.5rem; padding-right: 1.5rem; }
  .exp-wrap, .contact-wrap { padding: 4rem 1.5rem; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-card { display: none; }
  .about-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .project-featured { grid-template-columns: 1fr; }
  .project-featured-preview { display: none; }
  .projects-row, .projects-row-2, .projects-row-3 { grid-template-columns: 1fr; }
  .exp-item { grid-template-columns: 1fr; gap: 0.5rem; }
  .skills-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
}
@media (max-width: 600px) {
  .skills-grid { grid-template-columns: 1fr; }
  h1 { font-size: 3rem; }
}