/* =========================================
   SerenFlow Yoga London — Shared Stylesheet
   File: style.css
========================================= */

/* ========= CSS VARIABLES ========= */
:root {
  --color-bg: #f7f3eb;
  --color-bg-alt: #efe7db;
  --color-dark: #1f2a24;
  --color-dark-alt: #2f3a33;
  --color-sage: #667560;
  --color-sage-light: #87937f;
  --color-gold: #c6a46a;
  --color-gold-light: #dcc08f;
  --color-white: #ffffff;
  --color-text: #3e433f;
  --color-border: rgba(31, 42, 36, 0.1);

  --font-heading: "Cormorant Garamond", serif;
  --font-body: "DM Sans", sans-serif;

  --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.08);
  --shadow-card: 0 18px 45px rgba(0, 0, 0, 0.12);

  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 30px;

  --transition: all 0.35s ease;

  --container: 1200px;

  --space-xs: 0.5rem;
  --space-sm: 0.875rem;
  --space-md: 1.25rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
}

/* ========= RESET ========= */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  overflow-x: hidden;
}

img {
  width: 100%;
  display: block;
}

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

ul {
  list-style: none;
}

button,
input,
textarea {
  font-family: inherit;
}

section {
  padding: var(--space-2xl) 1.5rem;
  position: relative;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
}

/* ========= TYPOGRAPHY ========= */
h1,
h2,
h3,
h4,
h5 {
  font-family: var(--font-heading);
  color: var(--color-dark);
  line-height: 1.1;
  font-weight: 600;
}

h1 {
  font-size: clamp(3rem, 7vw, 6rem);
}

h2 {
  font-size: clamp(2.3rem, 5vw, 4rem);
  margin-bottom: 1rem;
}

h3 {
  font-size: 1.8rem;
  margin-bottom: 0.75rem;
}

p {
  margin-bottom: 1rem;
  color: var(--color-text);
}

.section-tag {
  display: inline-block;
  margin-bottom: 1rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-gold);
  font-size: 0.8rem;
  font-weight: 600;
}

/* ========= NAVIGATION ========= */
.navbar {
  position: sticky;
  top: 0;
  z-index: 999;
  background: rgba(247, 243, 235, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  min-height: 80px;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  color: var(--color-dark);
  font-weight: 700;
  letter-spacing: 0.5px;
}

.nav-menu {
  position: fixed;
  top: 80px;
  right: -100%;
  width: 100%;
  height: calc(100vh - 80px);
  background: var(--color-dark);
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  padding: 3rem 2rem;
  gap: 1.5rem;
  transition: var(--transition);
}

.nav-menu.active {
  right: 0;
}

.nav-menu a {
  color: var(--color-white);
  font-size: 1.1rem;
  transition: var(--transition);
}

.nav-menu a:hover {
  color: var(--color-gold-light);
}

.nav-cta {
  margin-top: 1rem;
}

.hamburger {
  width: 28px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.hamburger span {
  width: 100%;
  height: 2px;
  background: var(--color-dark);
  transition: var(--transition);
}

/* ========= BUTTONS ========= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.95rem 1.75rem;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  font-weight: 600;
  letter-spacing: 0.3px;
  gap: 0.5rem;
}

.btn-primary {
  background: var(--color-gold);
  color: var(--color-dark);
  box-shadow: var(--shadow-soft);
}

.btn-primary:hover {
  background: var(--color-gold-light);
  transform: translateY(-2px);
}

.btn-secondary {
  background: transparent;
  border: 1px solid var(--color-gold);
  color: var(--color-gold);
}

.btn-secondary:hover {
  background: var(--color-gold);
  color: var(--color-dark);
}

/* ========= HERO ========= */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(15, 15, 15, 0.35),
    rgba(15, 15, 15, 0.65)
  );
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
}

.hero h1,
.hero p {
  color: var(--color-white);
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

/* ========= CARDS ========= */
.card-grid {
  display: grid;
  gap: 1.5rem;
}

.card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card);
}

.card-content {
  padding: 1.5rem;
}

.card img {
  height: 280px;
  object-fit: cover;
}

/* ========= TRUST BAR ========= */
.trust-bar {
  background: var(--color-dark);
  color: var(--color-white);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: 2rem;
  text-align: center;
}

.trust-item h3 {
  color: var(--color-gold);
  margin-bottom: 0.25rem;
}

/* ========= SPLIT SECTION ========= */
.split-layout {
  display: grid;
  gap: 3rem;
  align-items: center;
}

.split-image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

/* ========= ICON FEATURES ========= */
.feature-grid {
  display: grid;
  gap: 1.5rem;
}

.feature-card {
  background: var(--color-white);
  padding: 2rem;
  border-radius: var(--radius-md);
  text-align: center;
  box-shadow: var(--shadow-soft);
}

.feature-icon {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background: rgba(198, 164, 106, 0.15);
  color: var(--color-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  font-size: 1.8rem;
}

/* ========= TESTIMONIALS ========= */
.testimonial-card {
  background: var(--color-white);
  padding: 2rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
  position: relative;
}

.testimonial-card::before {
  content: "“";
  position: absolute;
  top: 20px;
  right: 25px;
  font-size: 5rem;
  color: rgba(198, 164, 106, 0.15);
  font-family: var(--font-heading);
}

/* ========= FORMS ========= */
.form-group {
  margin-bottom: 1rem;
}

.form-control {
  width: 100%;
  padding: 1rem 1.2rem;
  border-radius: 14px;
  border: 1px solid rgba(31, 42, 36, 0.12);
  background: var(--color-white);
  font-size: 1rem;
  outline: none;
  transition: var(--transition);
}

.form-control:focus {
  border-color: var(--color-gold);
  box-shadow: 0 0 0 4px rgba(198, 164, 106, 0.12);
}

textarea.form-control {
  resize: vertical;
  min-height: 140px;
}

.inline-form {
  background: var(--color-dark);
  padding: 2rem;
  border-radius: var(--radius-lg);
}

.inline-form h2,
.inline-form p {
  color: var(--color-white);
}

/* ========= MODAL ========= */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 1000;
}

.modal.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  width: 100%;
  max-width: 540px;
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: 2rem;
  position: relative;
  animation: modalFade 0.4s ease;
}

.modal-close {
  position: absolute;
  top: 18px;
  right: 20px;
  background: transparent;
  border: none;
  font-size: 1.6rem;
  cursor: pointer;
  color: var(--color-dark);
}

.success-message {
  display: none;
  margin-top: 1rem;
  padding: 1rem;
  border-radius: var(--radius-sm);
  background: rgba(102, 117, 96, 0.12);
  color: var(--color-dark);
}

/* ========= FOOTER ========= */
.footer {
  background: var(--color-dark);
  color: rgba(255, 255, 255, 0.8);
  padding: 5rem 1.5rem 2rem;
}

.footer-grid {
  display: grid;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer h3,
.footer h4 {
  color: var(--color-white);
  margin-bottom: 1rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.footer-links a:hover {
  color: var(--color-gold-light);
}

.social-icons {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.social-icons a {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.social-icons a:hover {
  background: var(--color-gold);
  color: var(--color-dark);
  border-color: var(--color-gold);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.95rem;
}

/* ========= GRID UTILITIES ========= */
.grid-2 {
  display: grid;
  gap: 2rem;
}

.grid-3 {
  display: grid;
  gap: 2rem;
}

.grid-4 {
  display: grid;
  gap: 2rem;
}

/* ========= SPACING UTILITIES ========= */
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }

.text-center {
  text-align: center;
}

/* ========= ANIMATIONS ========= */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.8s ease;
}

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

.slide-up {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s ease;
}

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

@keyframes modalFade {
  from {
    transform: translateY(30px);
    opacity: 0;
  }

  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* ========= RESPONSIVE ========= */
@media (min-width: 768px) {
  .nav-menu {
    position: static;
    width: auto;
    height: auto;
    background: transparent;
    flex-direction: row;
    align-items: center;
    padding: 0;
    gap: 2rem;
  }

  .nav-menu a {
    color: var(--color-dark);
    font-size: 0.98rem;
  }

  .hamburger {
    display: none;
  }

  .trust-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .split-layout {
    grid-template-columns: repeat(2, 1fr);
  }

  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
  }

  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }

  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 1024px) {
  section {
    padding: 7rem 2rem;
  }

  .feature-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .hero-content {
    max-width: 820px;
  }
}