/*
  Caroline Hayes • Science Tutor
  Basic responsive, accessible styles
*/

:root {
  --bg: #f7f9fd;
  --surface: #ffffff;
  --surface-2: #f1f5fb;
  --text: #0b1020;
  --muted: #5c6478;
  --primary: #6ea8fe;
  --primary-600: #5c97f0;
  --accent: #7ae7c7;
  --danger: #ff6b6b;
  --shadow: 0 10px 30px rgba(0,0,0,.25);
}

* { box-sizing: border-box; }
html { 
  scroll-behavior: smooth; 
  scroll-padding-top: 60px; /* Account for fixed header */
}
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "Helvetica Neue", sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, var(--bg) 0%, #ffffff 100%);
  line-height: 1.6;
}

p {
  font-size: 1.2rem;
}

img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  width: min(1100px, 92%);
  margin: 0 auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(150%) blur(6px);
  border-bottom: 1px solid rgba(0,0,0,0.08);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 0;
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand-mark {
  display: inline-grid; place-items: center;
  width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #0a0f22;
  font-weight: 800;
}
.brand-text { letter-spacing: .3px; }

.nav-toggle { display: none; background: transparent; border: 0; cursor: pointer; }
.nav-toggle:focus-visible { outline: 2px solid var(--primary); outline-offset: 4px; }
.nav-toggle-bar { display: block; width: 24px; height: 2px; background: var(--text); margin: 5px 0; border-radius: 1px; }

.nav-list { display: flex; align-items: center; gap: 22px; list-style: none; padding: 0; margin: 0; }
.nav-list a { color: var(--text); opacity: .9; }
.nav-list a:hover { opacity: 1; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 16px; border-radius: 10px; border: 1px solid rgba(255,255,255,0.12); background: transparent; color: var(--text); font-weight: 600; text-decoration: none; cursor: pointer; transition: transform .06s ease, background .2s ease, box-shadow .2s ease; }
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-small { padding: 8px 12px; border-radius: 8px; font-size: .95rem; }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-600)); color: #0b1020; border-color: transparent; box-shadow: var(--shadow); }
.btn-ghost { background: rgba(255,255,255,0.06); }

/* Hero Title Section */
.hero-title-section {
  padding: 5px;
  text-align: center;
  max-height: 70px;
}

/* Hero */
.hero { padding: 0px 0 0px; border-bottom: 1px solid rgba(0,0,0,0.06); }
.hero-inner { 
  display: flex; 
  flex-direction: column;
  gap: 6px; 
  align-items: center; 
}
.hero h1 { 
  font-size: clamp(2rem, 4vw, 3rem); 
  line-height: 1; 
  margin: 0 0 0px; 
  text-align: center;
}
.hero p { margin: 18px 0 18px; color: var(--muted); }
.hero-subtitle { font-size: 1.3rem; line-height: 1.5; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-card { border-radius: 16px; background: radial-gradient(120% 120% at 0% 0%, rgba(110,168,254,.25) 0%, rgba(122,231,199,.12) 50%, rgba(0,0,0,.02) 100%), var(--surface); padding: 24px; box-shadow: var(--shadow); }
.metrics { display: grid; grid-template-columns: 1fr; gap: 12px; }
.metric { text-align: center; padding: 14px; border-radius: 12px; background: rgba(0,0,0,0.03); border: 1px solid rgba(0,0,0,0.06); }
.metric-value { display: block; font-size: 1.6rem; font-weight: 700; }
.metric-label { color: var(--muted); font-size: .95rem; }

/* Sections */
.section { padding: 64px 0; }
.section-alt { background: linear-gradient(180deg, rgba(0,0,0,0.02), rgba(0,0,0,0.00)); border-top: 1px solid rgba(0,0,0,0.06); border-bottom: 1px solid rgba(0,0,0,0.06); }
.section h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); margin: 0 0 18px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: start; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }

.card { background: var(--surface); border: 1px solid rgba(0,0,0,0.08); border-radius: 14px; padding: 18px; box-shadow: var(--shadow); }
.card h3 { margin-top: 0; }

.tags { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 10px 0 0; }
.tags li { padding: 6px 10px; border-radius: 999px; background: rgba(122,231,199,0.12); color: #bff3e3; border: 1px solid rgba(122,231,199,0.3); font-size: .9rem; }

.list-check { 
    list-style: none; 
    padding: 0; 
    margin: 12px 0 0; 
    font-size: 1.4rem;
}
.list-check li { position: relative; padding-left: 28px; margin: 8px 0; }
.list-check li::before { content: "✔"; position: absolute; left: 0; top: 0; color: var(--accent); }
.plain-list { list-style: none; padding: 0; margin: 0; color: var(--muted); }

/* Profile Picture */
.profile-picture { 
    display: flex; 
    flex-direction: column;
    justify-content: center; 
    align-items: center; 
}
.profile-image {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: var(--shadow);
    border: 4px solid var(--surface);
}

.profile-email {
    margin-top: 8px;
    text-align: center;
}

.profile-email a {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary);
}

/* Steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.step { display: grid; grid-template-columns: auto 1fr; gap: 12px; align-items: start; padding: 16px; border-radius: 12px; background: var(--surface-2); border: 1px solid rgba(0,0,0,0.08); }
.step-num { width: 36px; height: 36px; border-radius: 10px; display: grid; place-items: center; background: linear-gradient(135deg, var(--primary), var(--accent)); color: #0a0f22; font-weight: 800; }

/* Testimonials */
.testimonials blockquote { margin: 0; font-style: italic; }
.testimonials footer { margin-top: 10px; color: var(--muted); }

/* Contact */
.contact-details {
    display: grid;
    gap: 20px;
    margin-top: 20px;
}

.contact-item {
    margin-bottom: 20px;
}

.contact-item a {
    font-size: 1.2rem;
    font-weight: 600;
}

/* Footer */
.site-footer { border-top: 1px solid rgba(0,0,0,0.06); padding: 26px 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 12px; color: var(--muted); }
.back-to-top { color: var(--muted); }

/* Responsive */
@media (max-width: 900px) {
  .hero-inner { 
    flex-direction: column;
    gap: 5px;
  }
  .hero h1 { 
    font-size: clamp(1.8rem, 4vw, 2.5rem); 
    text-align: center; 
    padding: 10px;
  }
  .hero { padding: 0px 0 6px;}
  .metrics { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; }
  .nav-toggle { display: inline-block; }
  .nav-list { position: absolute; right: 4%; top: 64px; background: rgba(255,255,255,.98); border: 1px solid rgba(0,0,0,.10); border-radius: 12px; padding: 12px; display: none; flex-direction: column; gap: 10px; width: min(240px, 92vw); box-shadow: var(--shadow); }
  .nav-list.open { display: flex; }
}

@media (max-width: 560px) {
  .cards { grid-template-columns: 1fr; }
}