/* =============================================
   THE PHYSIO INSTITUTE — STYLESHEET
   Theme: Black / Teal (#2DD4BF) / Sky Blue (#0EA5E9)
   ============================================= */

:root {
  --black:        #000000;
  --black-soft:   #0a0a0a;
  --black-card:   #111111;
  --black-border: #1c1c1c;
  --gray-mid:     #888888;
  --gray-light:   #b0b0b0;
  --white:        #ffffff;
  --teal:         #2DD4BF;
  --cyan:         #0EA5E9;
  --gradient:     linear-gradient(135deg, #2DD4BF 0%, #0EA5E9 100%);
  --gradient-text: linear-gradient(135deg, #2DD4BF, #0EA5E9);
  --nav-height:   72px;
  --transition:   0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: Calibri, Arial, 'Helvetica Neue', sans-serif;
  background: var(--black);
  color: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ---- Utility ---- */
.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 20px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
}

.section-sub {
  font-size: 1.05rem;
  color: var(--gray-light);
  max-width: 620px;
  margin-bottom: 60px;
  line-height: 1.7;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 700;
  font-family: Calibri, Arial, 'Helvetica Neue', sans-serif;
  letter-spacing: 0.02em;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--gradient);
  color: var(--black);
}
.btn-primary:hover { opacity: 0.88; transform: translateY(-1px); }

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 1.5px solid rgba(255, 255, 255, 0.25);
}
.btn-outline:hover {
  border-color: var(--teal);
  color: var(--teal);
  transform: translateY(-1px);
}

.btn-full { width: 100%; }

/* =============================================
   NAVIGATION
   ============================================= */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--black-border);
  transition: var(--transition);
}

#navbar.scrolled {
  background: rgba(0, 0, 0, 0.95);
  border-bottom-color: rgba(45, 212, 191, 0.15);
}

.nav-container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav-logo {
  display: flex;
  align-items: baseline;
  gap: 5px;
  flex-shrink: 0;
}

.nav-logo-img {
  height: 44px;
  width: auto;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--gray-light);
  border-radius: 6px;
  transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active { color: var(--white); }

.nav-links .nav-cta {
  background: var(--gradient);
  color: var(--black);
  padding: 8px 20px;
  font-weight: 700;
}

.nav-links .nav-cta:hover { opacity: 0.85; color: var(--black); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}

/* =============================================
   HERO
   ============================================= */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--nav-height) 24px 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: var(--black);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero-logo { margin-bottom: 32px; }

.hero-logo-img {
  max-width: 760px;
  width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
  mix-blend-mode: lighten;
}

.hero-tagline {
  font-size: clamp(1.2rem, 2.5vw, 1.5rem);
  font-weight: 700;
  color: var(--white);
  max-width: 560px;
  margin: 0 auto 16px;
  line-height: 1.4;
}

.hero-sub {
  font-size: clamp(0.95rem, 1.8vw, 1.1rem);
  color: var(--gray-light);
  max-width: 520px;
  margin: 0 auto 40px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--gray-mid);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  z-index: 1;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--gray-mid), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; }
  50%       { opacity: 1; }
}

/* =============================================
   ABOUT
   ============================================= */
#about {
  padding: 120px 0;
  background: var(--black-soft);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.about-text h2 {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 24px;
}

.about-text p {
  color: var(--gray-light);
  margin-bottom: 20px;
  line-height: 1.75;
  font-size: 1.05rem;
}

.about-stats {
  display: flex;
  gap: 40px;
  margin-top: 40px;
  padding-top: 40px;
  border-top: 1px solid var(--black-border);
}

.stat { display: flex; flex-direction: column; gap: 4px; }

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1;
}

.stat-label {
  font-size: 0.78rem;
  color: var(--gray-mid);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-weight: 600;
}

.about-photo {
  position: sticky;
  top: calc(var(--nav-height) + 24px);
}

.about-photo-img {
  width: 100%;
  height: auto;
  border-radius: 16px;
  display: block;
  object-fit: cover;
}

.card-inner {
  background: var(--black-card);
  border: 1px solid var(--black-border);
  border-radius: 16px;
  padding: 40px;
}

.card-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6rem;
  color: var(--black);
  margin-bottom: 28px;
}

.card-inner h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.card-inner p {
  color: var(--gray-light);
  font-size: 0.93rem;
  line-height: 1.7;
}

.card-divider {
  border: none;
  border-top: 1px solid var(--black-border);
  margin: 24px 0;
}

/* =============================================
   SERVICES
   ============================================= */
#services {
  padding: 120px 0;
  background: var(--black);
}

.services-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.service-card {
  background: var(--black-card);
  border: 1px solid var(--black-border);
  border-radius: 16px;
  padding: 40px;
  position: relative;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.service-card:hover {
  border-color: rgba(45, 212, 191, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(45, 212, 191, 0.08);
}

.service-featured {
  border-color: rgba(45, 212, 191, 0.4);
  box-shadow: 0 0 0 1px rgba(45, 212, 191, 0.15), 0 24px 64px rgba(45, 212, 191, 0.1);
}

.service-badge {
  position: absolute;
  top: -14px;
  left: 32px;
  background: var(--gradient);
  color: var(--black);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 16px;
  border-radius: 100px;
  white-space: nowrap;
}

.service-icon {
  font-size: 1.8rem;
  margin-bottom: 16px;
  line-height: 1;
}

.service-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.service-card > p {
  font-size: 0.95rem;
  color: var(--gray-light);
  line-height: 1.7;
  margin-bottom: 24px;
}

.service-features {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 32px;
  flex: 1;
}

.service-features li {
  font-size: 0.88rem;
  color: var(--gray-light);
  padding-left: 22px;
  position: relative;
  line-height: 1.5;
}

.service-features li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--teal);
  font-size: 0.8rem;
  top: 1px;
}

.service-btn {
  width: 100%;
  text-align: center;
}

/* =============================================
   BOOK / CONTACT
   ============================================= */
#book {
  padding: 120px 0;
  background: var(--black-soft);
}

.book-block {
  margin-bottom: 80px;
}

.book-block-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--black-border);
}

.calendly-wrapper {
  background: #ffffff;
  border: 1px solid var(--black-border);
  border-radius: 16px;
  overflow: hidden;
}

.enquiry-block { margin-bottom: 0; }

.enquiry-form-solo {
  max-width: 720px;
  margin: 0 auto;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 80px;
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.contact-icon {
  font-size: 1.1rem;
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  background: var(--black-card);
  border: 1px solid var(--black-border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-item h4 {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray-mid);
  margin-bottom: 4px;
}

.contact-item p {
  font-size: 0.95rem;
  color: var(--white);
  line-height: 1.5;
}

/* Contact / Enquiry Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--gray-light);
  letter-spacing: 0.03em;
}

.form-group input,
.form-group textarea,
.form-group select {
  background: var(--black-card);
  border: 1px solid var(--black-border);
  border-radius: 8px;
  padding: 13px 16px;
  font-size: 0.95rem;
  font-family: Calibri, Arial, 'Helvetica Neue', sans-serif;
  color: var(--white);
  transition: border-color var(--transition);
  width: 100%;
}

.form-group textarea { resize: vertical; }

.form-group select {
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23888888' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
}

.form-group select option { background: var(--black-card); color: var(--white); }

.form-group input::placeholder,
.form-group textarea::placeholder { color: #3a3a3a; }

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: rgba(45, 212, 191, 0.5);
  box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.08);
}

.form-privacy {
  font-size: 0.8rem;
  color: var(--gray-mid);
  text-align: center;
  line-height: 1.5;
}

/* =============================================
   FOOTER
   ============================================= */
#footer {
  background: var(--black-soft);
  border-top: 1px solid var(--black-border);
  padding: 80px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 64px;
}

.footer-brand .footer-logo {
  margin-bottom: 16px;
}

.footer-logo-img {
  height: 48px;
  width: auto;
  display: block;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--gray-mid);
  line-height: 1.6;
  max-width: 260px;
}

.footer-links h4 {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray-mid);
  margin-bottom: 20px;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links ul a {
  font-size: 0.9rem;
  color: var(--gray-light);
  transition: color var(--transition);
}

.footer-links ul a:hover { color: var(--teal); }

.footer-bottom {
  border-top: 1px solid var(--black-border);
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.footer-bottom p {
  font-size: 0.83rem;
  color: var(--gray-mid);
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 1024px) {
  .about-grid    { grid-template-columns: 1fr; gap: 48px; }
  .about-photo   { position: static; }
  .footer-grid   { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .hamburger { display: flex; }

  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px;
    gap: 4px;
    border-bottom: 1px solid var(--black-border);
  }

  .nav-links.open    { display: flex; }
  .nav-links a       { padding: 12px 16px; width: 100%; }
  .nav-links .nav-cta { text-align: center; margin-top: 8px; }

  .services-grid  { grid-template-columns: 1fr; }
  .contact-grid   { grid-template-columns: 1fr; gap: 48px; }
  .form-row       { grid-template-columns: 1fr; }
  .footer-grid    { grid-template-columns: 1fr; gap: 32px; }
  .about-stats    { gap: 24px; }

  #about, #services, #book { padding: 80px 0; }
}

@media (max-width: 480px) {
  .hero-actions          { flex-direction: column; }
  .hero-actions .btn     { width: 100%; max-width: 320px; }
  .about-stats           { flex-direction: column; gap: 20px; }
}

/* =============================================
   SCROLL ANIMATIONS
   ============================================= */
.fade-up {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}