:root {
  --bg: #f8f9fc;
  --text: #222;
  --card: #ffffff;
  --accent: #8d96ff;
  --accent-dark: #9aa2ff;
  --nav: rgba(255,255,255,0.92);
  --shadow: 0 8px 24px rgba(0,0,0,0.08);
  --muted: #666;
  --border: #e6e8f0;
}

body.dark {
  --bg: #111218;
  --text: #f2f2f2;
  --card: #1b1d25;
  --accent: #8d96ff;
  --accent-dark: #9aa2ff;
  --nav: rgba(17,18,24,0.95);
  --shadow: 0 8px 24px rgba(0,0,0,0.35);
  --muted: #b7b7c2;
  --border: #2c2f3a;
}

* {
  box-sizing: border-box;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* NAV */

nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--nav);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 40px;
}

nav .logo {
  font-size: 24px;
  font-weight: bold;
  color: var(--accent);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 24px;
  margin: 0;
  padding: 0;
}

.nav-links li a {
  color: var(--text);
  font-weight: 500;
}

/* GLOBAL */

section {
  max-width: 1100px;
  margin: 80px auto;
  padding: 0 20px;
}

h1,
h2,
h3 {
  margin: 0;
}

h2 {
  font-size: 42px;
}

/* CARDS */

.about-box,
.card,
.skills-box,
.timeline-item,
.contact-box {
  background: var(--card);
  padding: 30px;
  border-radius: 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card p,
.about-box p,
.timeline-item p {
  color: var(--muted);
  line-height: 1.8;
}

/* BUTTONS */

.project-link {
  display: inline-block;
  margin-top: 12px;
  background: var(--accent);
  color: white;
  padding: 12px 18px;
  border-radius: 999px;
  font-weight: 600;
}

.project-link:hover {
  background: var(--accent-dark);
  text-decoration: none;
}

.project-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 20px;
  align-items: flex-start;
}

/* PLAYBOOK PAGE */

.playbook-page {
  width: min(900px, 90%);
  margin: 0 auto;
  padding: 70px 0 120px;
}

.playbook-label {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 24px;
  font-size: 0.85rem;
}

.back-link {
  display: inline-block;
  margin-bottom: 40px;
  color: var(--accent);
  font-weight: 600;
}

.back-link:hover {
  text-decoration: none;
}

.playbook-page h1 {
  font-size: clamp(3rem, 8vw, 5rem);
  line-height: 1;
  margin-bottom: 24px;
}

.playbook-page h2 {
  margin-top: 80px;
  margin-bottom: 20px;
  font-size: 2rem;
  text-align: left;
}

.playbook-page h3 {
  margin-top: 40px;
  margin-bottom: 12px;
  color: var(--accent);
}

.playbook-intro,
.playbook-page p,
.playbook-page li {
  color: var(--muted);
  line-height: 1.9;
  font-size: 1.05rem;
}

.playbook-intro {
  font-size: 1.2rem;
  max-width: 720px;
}

.playbook-image {
  width: 100%;
  margin: 50px 0;
  border-radius: 20px;
}

.playbook-page ul {
  padding-left: 20px;
}

/* TOOLS */

.tools-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.tools-grid span {
  background: var(--card);
  border: 1px solid var(--border);
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--text);
}

/* FOOTER */

footer {
  text-align: center;
  padding: 40px;
  color: var(--muted);
}

/* MOBILE */

@media (max-width: 768px) {
  nav {
    padding: 16px 20px;
  }

  nav .logo {
    font-size: 20px;
  }

  .nav-links {
    gap: 14px;
    flex-wrap: wrap;
  }

  .playbook-page {
    padding: 60px 20px;
  }

  .playbook-page h1 {
    font-size: 38px;
  }

  .playbook-page h2 {
    font-size: 28px;
  }

  .playbook-page h3 {
    font-size: 18px;
  }

  .playbook-intro {
    font-size: 18px;
  }
}