/* main stylesheet - harmony fitness website
   ISBS302 AT3 - Kaifan XIE */

:root {
  --clr-primary: #3d7a4f;
  --clr-primary-hover: #5aaa6e;
  --clr-primary-pale: #eaf5ee;
  --clr-dark: #1a2338;
  --clr-dark2: #243050;
  --clr-bg-warm: #f9f6f0;
  --clr-bg-light: #fdfaf5;
  --clr-txt: #1a2338;
  --clr-txt-grey: #6b7280;
  --clr-gold: #c9a84c;
  --clr-footer: #101520;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'DM Sans', sans-serif;
  background: var(--clr-bg-light);
  color: var(--clr-txt);
  line-height: 1.6;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; }
ul { list-style: none; }

.section-label {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--clr-primary);
  margin-bottom: 11px;
}
.section-title {
  font-family: 'Playfair Display', serif;
  font-size: 42px;
  font-weight: 700;
  color: var(--clr-txt);
  margin-bottom: 15px;
  line-height: 1.2;
}
.section-sub {
  color: var(--clr-txt-grey);
  font-size: 16px;
  line-height: 1.6;
  max-width: 520px;
  margin-bottom: 58px;
}

.btn-primary {
  background: var(--clr-primary);
  color: #fff;
  padding: 14px 32px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  transition: all 0.2s;
  display: inline-block;
  cursor: pointer;
  border: none;
  font-family: 'DM Sans', sans-serif;
}
.btn-primary:hover { background: var(--clr-primary-hover); transform: translateY(-2px); }

.btn-outline {
  border: 1.5px solid rgba(255,255,255,0.4);
  color: #fff;
  padding: 14px 32px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  transition: all 0.2s;
  display: inline-block;
  cursor: pointer;
  background: transparent;
  font-family: 'DM Sans', sans-serif;
}
.btn-outline:hover { border-color: var(--clr-primary-hover); color: var(--clr-primary-hover); }

.btn-green {
  background: var(--clr-primary);
  color: #fff;
  padding: 10px 26px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  transition: background 0.2s;
  display: inline-block;
  cursor: pointer;
  border: none;
  font-family: 'DM Sans', sans-serif;
}
.btn-green:hover { background: var(--clr-primary-hover); }

/* nav */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--clr-dark);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 48px;
  height: 68px;
  box-shadow: 0 2px 18px rgba(0,0,0,0.18);
}
.nav-logo {
  font-family: 'Playfair Display', serif;
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.5px;
}
.nav-logo span { color: var(--clr-primary-hover); }
.nav-links { display: flex; gap: 32px; }
.nav-links a {
  color: rgba(255,255,255,0.82);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.3px;
  transition: color 0.2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--clr-primary-hover); }
.nav-cta {
  background: var(--clr-primary);
  color: #fff;
  padding: 10px 22px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  transition: background 0.2s;
}
.nav-cta:hover { background: var(--clr-primary-hover); }

/* inner page hero */
.page-hero {
  background: linear-gradient(135deg, var(--clr-dark) 0%, var(--clr-dark2) 60%, #1e3a2f 100%);
  padding: 78px 80px 68px;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  top: -60px; right: -60px;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(61,122,79,0.2) 0%, transparent 70%);
  border-radius: 50%;
}
.page-hero-breadcrumb { color: rgba(255,255,255,0.45); font-size: 13px; margin-bottom: 14px; }
.page-hero-breadcrumb a { color: rgba(255,255,255,0.45); }
.page-hero-breadcrumb a:hover { color: var(--clr-primary-hover); }
.page-hero h1 {
  font-family: 'Playfair Display', serif;
  font-size: 52px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
}
.page-hero p { color: rgba(255,255,255,0.7); font-size: 17px; max-width: 560px; }

/* footer */
footer {
  background: var(--clr-footer);
  padding: 62px 80px 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 46px;
}
.footer-brand-name {
  font-family: 'Playfair Display', serif;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 11px;
}
.footer-brand-name span { color: var(--clr-primary-hover); }
.footer-desc { color: rgba(255,255,255,0.45); font-size: 14px; line-height: 1.7; margin-bottom: 18px; }
.footer-col h3 {
  color: #fff;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.footer-col ul li { margin-bottom: 9px; }
.footer-col ul li a { color: rgba(255,255,255,0.45); font-size: 14px; transition: color 0.2s; }
.footer-col ul li a:hover { color: var(--clr-primary-hover); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
}
.footer-copy { color: rgba(255,255,255,0.3); font-size: 13px; }
.social-links { display: flex; gap: 10px; }
.social-links a {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.5);
  font-size: 12px;
  font-weight: 700;
  transition: all 0.2s;
}
.social-links a:hover { background: var(--clr-primary); color: #fff; }

/* service cards */
.service-card {
  background: #fff;
  border-radius: 16px;
  padding: 34px 30px;
  border: 1px solid #e8ede9;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 4px;
  background: var(--clr-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s;
}
.service-card:hover { transform: translateY(-6px); box-shadow: 0 20px 40px rgba(0,0,0,0.09); }
.service-card:hover::before { transform: scaleX(1); }
.service-icon {
  width: 52px; height: 52px;
  background: var(--clr-primary-pale);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 19px;
  font-size: 24px;
}
.service-card h3 { font-family: 'Playfair Display', serif; font-size: 20px; font-weight: 700; margin-bottom: 11px; }
.service-card p { color: var(--clr-txt-grey); font-size: 14px; line-height: 1.7; }

/* testimonials */
.testi-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 16px;
  padding: 30px;
}
.testi-stars { color: var(--clr-gold); font-size: 14px; margin-bottom: 14px; }
.testi-text { color: rgba(255,255,255,0.8); font-size: 15px; line-height: 1.7; margin-bottom: 22px; font-style: italic; }
.testi-author { display: flex; align-items: center; gap: 12px; }
.testi-avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--clr-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  font-family: 'Playfair Display', serif;
  flex-shrink: 0;
}
.testi-name { font-weight: 500; color: #fff; font-size: 14px; }
.testi-role { font-size: 12px; color: rgba(255,255,255,0.45); }

/* trainer cards */
.trainer-card {
  background: #fff;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid #e8ede9;
  transition: all 0.3s;
}
.trainer-card:hover { transform: translateY(-5px); box-shadow: 0 18px 38px rgba(0,0,0,0.1); }
.trainer-photo {
  height: 220px;
  background: linear-gradient(135deg, var(--clr-primary-pale), var(--clr-bg-warm));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 72px;
}
.trainer-info { padding: 26px; }
.trainer-info h3 { font-family: 'Playfair Display', serif; font-size: 22px; font-weight: 700; margin-bottom: 4px; }
.trainer-role { color: var(--clr-primary); font-size: 13px; font-weight: 500; margin-bottom: 11px; }
.trainer-info p { color: var(--clr-txt-grey); font-size: 14px; line-height: 1.6; margin-bottom: 14px; }
.trainer-tags { display: flex; gap: 7px; flex-wrap: wrap; margin-bottom: 18px; }
.tag { background: var(--clr-primary-pale); color: var(--clr-primary); font-size: 11px; font-weight: 500; padding: 4px 10px; border-radius: 20px; }

/* plan cards */
.plan-card {
  background: #fff;
  border-radius: 20px;
  padding: 38px 34px;
  border: 2px solid #e8ede9;
  position: relative;
  transition: box-shadow 0.3s;
}
.plan-card.featured { border-color: var(--clr-primary); }
.plan-card:hover { box-shadow: 0 18px 40px rgba(0,0,0,0.09); }
.plan-badge {
  position: absolute;
  top: -13px; left: 50%; transform: translateX(-50%);
  background: var(--clr-primary);
  color: #fff;
  font-size: 11px; font-weight: 500; letter-spacing: 1px; text-transform: uppercase;
  padding: 4px 16px; border-radius: 20px;
}
.plan-name { font-size: 13px; font-weight: 500; text-transform: uppercase; letter-spacing: 1px; color: var(--clr-txt-grey); margin-bottom: 11px; }
.plan-price { font-family: 'Playfair Display', serif; font-size: 52px; font-weight: 700; color: var(--clr-txt); line-height: 1; margin-bottom: 4px; }
.plan-price span { font-size: 20px; }
.plan-period { color: var(--clr-txt-grey); font-size: 14px; margin-bottom: 26px; }
.plan-features { margin-bottom: 30px; }
.plan-features li { padding: 8px 0; font-size: 14px; border-bottom: 1px solid #f0f0f0; color: var(--clr-txt-grey); }
.plan-features li.included { color: var(--clr-txt); }
.plan-features li.included::before { content: '✓ '; color: var(--clr-primary); font-weight: 700; }
.plan-features li.excluded { color: #ccc; }
.plan-features li.excluded::before { content: '✗ '; }

/* forms */
.form-group { margin-bottom: 19px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; color: var(--clr-txt); margin-bottom: 6px; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 15px;
  border: 1.5px solid #e5e7eb;
  border-radius: 8px;
  font-size: 14px;
  font-family: 'DM Sans', sans-serif;
  color: var(--clr-txt);
  background: #fff;
  transition: border-color 0.2s;
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--clr-primary); }
.form-group input.error,
.form-group select.error,
.form-group textarea.error { border-color: #e74c3c; }
.error-msg { color: #e74c3c; font-size: 12px; margin-top: 4px; display: none; }
.error-msg.visible { display: block; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }

/* modal */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 999;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(4px);
  align-items: center;
  justify-content: center;
}
.modal-overlay.active { display: flex; }
.modal-box {
  background: #fff;
  border-radius: 20px;
  padding: 46px 38px;
  max-width: 480px;
  width: 90%;
  position: relative;
  text-align: center;
  box-shadow: 0 28px 70px rgba(0,0,0,0.22);
}
.modal-close { position: absolute; top: 15px; right: 19px; font-size: 22px; cursor: pointer; color: var(--clr-txt-grey); background: none; border: none; line-height: 1; }
.modal-close:hover { color: var(--clr-txt); }
.modal-icon { font-size: 48px; margin-bottom: 18px; }
.modal-box h3 { font-family: 'Playfair Display', serif; font-size: 26px; font-weight: 700; margin-bottom: 11px; color: var(--clr-txt); }
.modal-box p { color: var(--clr-txt-grey); font-size: 15px; line-height: 1.6; margin-bottom: 26px; }

/* schedule table */
.schedule-wrap { overflow-x: auto; }
.schedule-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.schedule-table th { background: var(--clr-dark); color: #fff; padding: 13px 18px; text-align: left; font-weight: 500; font-size: 13px; }
.schedule-table td { padding: 13px 18px; border-bottom: 1px solid #f0f0f0; }
.schedule-table tr:hover td { background: var(--clr-primary-pale); }
.badge-level { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: 11px; font-weight: 500; }
.badge-all { background: var(--clr-primary-pale); color: var(--clr-primary); }
.badge-int { background: #fff3cd; color: #856404; }
.badge-adv { background: #f8d7da; color: #721c24; }

@media screen and (max-width: 1024px) {
  nav { padding: 0 28px; }
  .nav-links { gap: 20px; }
  .page-hero { padding: 58px 40px 48px; }
  footer { padding: 46px 40px 26px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
}

@media screen and (max-width: 768px) {
  .nav-links { display: none; }
  nav { padding: 0 20px; }
  .page-hero h1 { font-size: 34px; }
  .page-hero { padding: 46px 22px 38px; }
  .section-title { font-size: 28px; }
  footer { padding: 38px 22px 22px; }
  .footer-grid { grid-template-columns: 1fr; gap: 22px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .form-row { grid-template-columns: 1fr; }
}

/* real image replacements */
.img-cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.img-contain {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}
.trainer-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.team-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
}
.class-banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.product-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.about-img-placeholder img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 20px;
}