/* ============================================
   SARA NUTRITIONAL CONSULTING
   Global Design System — Stone & Moss Palette
   ============================================ */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,500;0,600;0,700;0,800;1,400;1,500;1,600&family=Inter:wght@300;400;500;600;700&display=swap');

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Colors — Stone & Moss */
  --color-bg: #F2F0EB;
  --color-bg-alt: #E5E2D9;
  --color-heading: #2D2926;
  --color-body: #5A5550;
  --color-body-light: #8A8580;
  --color-primary: rgb(145, 178, 77);
  --color-primary-dark: rgb(120, 150, 60);
  --color-primary-light: rgba(145, 178, 77, 0.15);
  --color-white: #FFFFFF;
  --color-border: rgba(45, 41, 38, 0.08);
  --color-border-strong: rgba(45, 41, 38, 0.15);
  --color-overlay: rgba(45, 41, 38, 0.55);

  /* Typography */
  --font-heading: 'Playfair Display', 'Georgia', serif;
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;

  /* Spacing scale */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 8rem;
  --space-4xl: 10rem;

  /* Layout */
  --max-width: 1200px;
  --max-width-narrow: 800px;
  --nav-height: 80px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(45, 41, 38, 0.06);
  --shadow-md: 0 4px 20px rgba(45, 41, 38, 0.08);
  --shadow-lg: 0 8px 40px rgba(45, 41, 38, 0.10);
  --shadow-xl: 0 16px 60px rgba(45, 41, 38, 0.12);

  /* Borders */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 30px;

  /* Transitions */
  --ease-smooth: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --transition-fast: 0.2s var(--ease-smooth);
  --transition-base: 0.35s var(--ease-smooth);
  --transition-slow: 0.6s var(--ease-smooth);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--color-body);
  background-color: var(--color-bg);
  line-height: 1.7;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-fast);
}

ul, ol {
  list-style: none;
}

button {
  font-family: var(--font-body);
  cursor: pointer;
  border: none;
  outline: none;
  background: none;
}

input, textarea {
  font-family: var(--font-body);
  border: none;
  outline: none;
}

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5 {
  font-family: var(--font-heading);
  color: var(--color-heading);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 700;
  line-height: 1.08;
}

h2 {
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 600;
}

h3 {
  font-size: clamp(1.4rem, 2.5vw, 1.8rem);
  font-weight: 600;
}

h4 {
  font-size: clamp(1.1rem, 1.5vw, 1.3rem);
  font-weight: 600;
}

p {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--color-body);
}

.overline {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-primary);
  display: block;
  margin-bottom: var(--space-sm);
}

/* ---------- Layout Containers ---------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container--narrow {
  max-width: var(--max-width-narrow);
}

.section {
  padding: var(--space-3xl) 0;
}

.section--alt {
  background-color: var(--color-bg-alt);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 1rem 2.2rem;
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 4px 15px rgba(145, 178, 77, 0.25);
}

.btn--primary:hover {
  background-color: var(--color-primary-dark);
  box-shadow: 0 6px 25px rgba(145, 178, 77, 0.4);
  transform: translateY(-2px);
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-heading);
  border: 1.5px solid var(--color-border-strong);
}

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

.btn--outline-white {
  background-color: transparent;
  color: var(--color-white);
  border: 1.5px solid rgba(255, 255, 255, 0.4);
}

.btn--outline-white:hover {
  background-color: var(--color-white);
  color: var(--color-heading);
  transform: translateY(-2px);
}

/* ---------- NAVBAR ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: 1000;
  transition: all var(--transition-base);
  background-color: rgba(242, 240, 235, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.navbar.scrolled {
  background-color: rgba(242, 240, 235, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 20px rgba(45, 41, 38, 0.06);
}

.navbar__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar__logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
}

.navbar__logo-icon {
  width: 36px;
  height: 36px;
  background-color: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.navbar__logo-icon svg {
  width: 20px;
  height: 20px;
  fill: var(--color-white);
}

.navbar__logo-text {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-heading);
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.navbar__logo-text span {
  display: block;
  font-family: var(--font-body);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-body-light);
  margin-top: 1px;
}

.navbar__links {
  display: flex;
  align-items: center;
  gap: 2.2rem;
}

.navbar__link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-body);
  position: relative;
  padding: 0.3rem 0;
  transition: color var(--transition-fast);
}

.navbar__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-base);
  border-radius: 2px;
}

.navbar__link:hover,
.navbar__link.active {
  color: var(--color-heading);
}

.navbar__link:hover::after,
.navbar__link.active::after {
  width: 100%;
}

.navbar__cta {
  margin-left: 1rem;
}

/* Mobile Menu Toggle */
.navbar__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
  cursor: pointer;
  z-index: 1001;
}

.navbar__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-heading);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.navbar__toggle.active span:nth-child(1) {
  transform: rotate(45deg) translateY(5px) translateX(5px);
}

.navbar__toggle.active span:nth-child(2) {
  opacity: 0;
}

.navbar__toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translateY(-5px) translateX(5px);
}

/* ---------- FOOTER ---------- */
.footer {
  background-color: var(--color-heading);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-3xl) 0 var(--space-lg) 0;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
}

.footer__brand p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-top: var(--space-sm);
}

.footer__logo {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--color-white);
}

.footer__logo span {
  display: block;
  font-family: var(--font-body);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.4);
  margin-top: 2px;
}

.footer__heading {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

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

.footer__links a {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.6);
  transition: all var(--transition-fast);
}

.footer__links a:hover {
  color: var(--color-primary);
  padding-left: 4px;
}

.footer__contact-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 0.8rem;
  font-size: 0.95rem;
}

.footer__contact-item svg {
  width: 18px;
  height: 18px;
  fill: var(--color-primary);
  flex-shrink: 0;
  margin-top: 3px;
}

.footer__social {
  display: flex;
  gap: 0.8rem;
  margin-top: var(--space-md);
}

.footer__social a {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
}

.footer__social a:hover {
  background-color: var(--color-primary);
  transform: translateY(-3px);
}

.footer__social svg {
  width: 18px;
  height: 18px;
  fill: rgba(255, 255, 255, 0.7);
}

.footer__social a:hover svg {
  fill: var(--color-white);
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
}

/* ---------- Animations ---------- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s var(--ease-smooth), transform 0.8s var(--ease-smooth);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.8s var(--ease-smooth), transform 0.8s var(--ease-smooth);
}

.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.8s var(--ease-smooth), transform 0.8s var(--ease-smooth);
}

.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.95);
  transition: opacity 0.8s var(--ease-smooth), transform 0.8s var(--ease-smooth);
}

.reveal-scale.visible {
  opacity: 1;
  transform: scale(1);
}

/* Staggered children */
.stagger-children .reveal:nth-child(1) { transition-delay: 0s; }
.stagger-children .reveal:nth-child(2) { transition-delay: 0.12s; }
.stagger-children .reveal:nth-child(3) { transition-delay: 0.24s; }
.stagger-children .reveal:nth-child(4) { transition-delay: 0.36s; }
.stagger-children .reveal:nth-child(5) { transition-delay: 0.48s; }
.stagger-children .reveal:nth-child(6) { transition-delay: 0.6s; }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 1024px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 70px;
  }

  .section {
    padding: var(--space-2xl) 0;
  }

  .container {
    padding: 0 var(--space-md);
  }

  /* Mobile Nav */
  .navbar__links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 380px;
    height: 100vh;
    background-color: var(--color-bg);
    flex-direction: column;
    align-items: flex-start;
    padding: calc(var(--nav-height) + 2rem) var(--space-lg) var(--space-lg);
    gap: 1.2rem;
    box-shadow: -10px 0 40px rgba(0, 0, 0, 0.1);
    transition: right var(--transition-base);
  }

  .navbar__links.open {
    right: 0;
  }

  .navbar__link {
    font-size: 1.1rem;
  }

  .navbar__cta {
    margin-left: 0;
    margin-top: 1rem;
  }

  .navbar__toggle {
    display: flex;
  }

  /* Footer */
  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .btn {
    padding: 0.85rem 1.6rem;
    font-size: 0.9rem;
  }
}