/* ============================================
   綠色療育 · 樂齡手作工坊
   主樣式表
   ============================================ */

/* --- CSS Variables --- */
:root {
  --clr-bg:         #F7F3EC;
  --clr-surface:    #FDFAF4;
  --clr-primary:    #5C7A4E;
  --clr-primary-dk: #3E5534;
  --clr-primary-lt: #A8C49A;
  --clr-accent:     #C4956A;
  --clr-accent-lt:  #F0E0CC;
  --clr-text:       #3D3529;
  --clr-muted:      #7A6E63;
  --clr-border:     #DDD4C2;
  --clr-white:      #FFFFFF;

  --ff-heading: 'Noto Serif TC', 'Georgia', serif;
  --ff-body:    'Noto Sans TC', 'Arial', sans-serif;

  --fs-xs:   0.75rem;
  --fs-sm:   0.875rem;
  --fs-base: 1rem;
  --fs-lg:   1.125rem;
  --fs-xl:   1.375rem;
  --fs-2xl:  1.75rem;
  --fs-3xl:  2.25rem;
  --fs-4xl:  3rem;

  --radius-sm: 8px;
  --radius:    16px;
  --radius-lg: 28px;

  --shadow-sm: 0 1px 6px rgba(61,53,41,0.07);
  --shadow:    0 4px 20px rgba(61,53,41,0.10);
  --shadow-lg: 0 8px 40px rgba(61,53,41,0.13);

  --transition: 0.25s ease;
  --max-width: 1080px;
}

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

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

body {
  font-family: var(--ff-body);
  background-color: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

ul {
  list-style: none;
}

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--ff-heading);
  font-weight: 700;
  line-height: 1.3;
  color: var(--clr-text);
}

h1 { font-size: var(--fs-4xl); }
h2 { font-size: var(--fs-3xl); }
h3 { font-size: var(--fs-2xl); }
h4 { font-size: var(--fs-xl); }

p {
  color: var(--clr-muted);
  line-height: 1.8;
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 5rem 0;
}

.section-sm {
  padding: 3rem 0;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border-radius: 50px;
  font-family: var(--ff-body);
  font-size: var(--fs-base);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
}

.btn-primary {
  background-color: var(--clr-primary);
  color: var(--clr-white);
  border-color: var(--clr-primary);
}

.btn-primary:hover {
  background-color: var(--clr-primary-dk);
  border-color: var(--clr-primary-dk);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.btn-outline {
  background-color: transparent;
  color: var(--clr-primary);
  border-color: var(--clr-primary);
}

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

/* --- Section Labels --- */
.section-label {
  display: inline-block;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--clr-primary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  padding: 0.3rem 0.9rem;
  background-color: rgba(92,122,78,0.12);
  border-radius: 50px;
}

.section-title {
  font-size: var(--fs-3xl);
  color: var(--clr-text);
  margin-bottom: 1rem;
}

.section-desc {
  font-size: var(--fs-lg);
  color: var(--clr-muted);
  max-width: 560px;
  margin-bottom: 2.5rem;
}

.text-center { text-align: center; }
.text-center .section-desc { margin-left: auto; margin-right: auto; }

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(247,243,236,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--clr-border);
  padding: 1rem 0;
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--ff-heading);
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--clr-primary-dk);
  transition: var(--transition);
}

.navbar-brand:hover {
  color: var(--clr-primary);
}

.navbar-brand-icon {
  width: 36px;
  height: 36px;
}

.navbar-links {
  display: flex;
  gap: 0.25rem;
  align-items: center;
}

.navbar-links a {
  font-size: var(--fs-base);
  color: var(--clr-muted);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  font-weight: 500;
}

.navbar-links a:hover,
.navbar-links a.active {
  color: var(--clr-primary-dk);
  background-color: rgba(92,122,78,0.1);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 0.5rem;
  border: none;
  background: none;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--clr-text);
  border-radius: 2px;
  transition: var(--transition);
}

/* Mobile nav */
.mobile-nav {
  display: none;
  flex-direction: column;
  padding: 1rem 0;
  border-top: 1px solid var(--clr-border);
  margin-top: 1rem;
}

.mobile-nav.open {
  display: flex;
}

.mobile-nav a {
  padding: 0.75rem 0;
  font-size: var(--fs-lg);
  color: var(--clr-muted);
  border-bottom: 1px solid var(--clr-border);
  transition: var(--transition);
}

.mobile-nav a:hover,
.mobile-nav a.active {
  color: var(--clr-primary);
}

/* ============================================
   HERO
   ============================================ */
.hero {
  background: linear-gradient(150deg, #E4EEE0 0%, #F2EDE5 45%, #EDE7DA 100%);
  padding: 6rem 0 5rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(92,122,78,0.12) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -40px;
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(196,149,106,0.10) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-eyebrow {
  display: inline-block;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--clr-primary);
  letter-spacing: 0.12em;
  margin-bottom: 1rem;
  padding: 0.35rem 1rem;
  background-color: rgba(92,122,78,0.12);
  border-radius: 50px;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  color: var(--clr-text);
  margin-bottom: 1.25rem;
  line-height: 1.25;
}

.hero h1 em {
  font-style: normal;
  color: var(--clr-primary);
}

.hero-desc {
  font-size: var(--fs-lg);
  color: var(--clr-muted);
  margin-bottom: 2rem;
  max-width: 460px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Hero visual */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-illustration {
  width: 100%;
  max-width: 400px;
  aspect-ratio: 1;
  background: linear-gradient(135deg, #D4E6C8 0%, #E8F0E0 50%, #C8DCBA 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  position: relative;
}

.hero-illustration img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-illustration-placeholder {
  text-align: center;
  color: var(--clr-primary);
  opacity: 0.5;
}

.hero-illustration-placeholder svg {
  width: 80px;
  height: 80px;
  margin-bottom: 0.5rem;
}

.hero-illustration-placeholder p {
  font-size: var(--fs-sm);
  color: var(--clr-primary);
}

/* ============================================
   PAGE HERO (inner pages)
   ============================================ */
.page-hero {
  background: linear-gradient(150deg, #E4EEE0 0%, #F2EDE5 100%);
  padding: 4rem 0 3rem;
  text-align: center;
}

.page-hero h1 {
  font-size: var(--fs-3xl);
  margin-bottom: 0.75rem;
}

.page-hero p {
  font-size: var(--fs-lg);
  max-width: 500px;
  margin: 0 auto;
}

/* ============================================
   CARDS
   ============================================ */
.card {
  background-color: var(--clr-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--clr-border);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.card-image {
  width: 100%;
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, #C8DCBA 0%, #D4E6C8 100%);
  overflow: hidden;
  position: relative;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-image-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-primary);
  opacity: 0.4;
}

.card-body {
  padding: 1.5rem;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

.card-date {
  font-size: var(--fs-sm);
  color: var(--clr-muted);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.card-tag {
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--clr-primary);
  background-color: rgba(92,122,78,0.12);
  padding: 0.2rem 0.6rem;
  border-radius: 50px;
}

.card h3 {
  font-size: var(--fs-xl);
  margin-bottom: 0.5rem;
  color: var(--clr-text);
}

.card p {
  font-size: var(--fs-sm);
  color: var(--clr-muted);
  margin-bottom: 1.25rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-link {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--clr-primary);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: var(--transition);
}

.card-link:hover {
  color: var(--clr-primary-dk);
  gap: 0.5rem;
}

/* --- Grid layouts --- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
}

/* ============================================
   HOME - INTRO SECTION
   ============================================ */
.intro-section {
  background-color: var(--clr-surface);
}

.intro-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}

.intro-image {
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, #D4E6C8 0%, #E8F0E0 100%);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-primary);
}

.intro-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.intro-content .section-desc {
  max-width: 100%;
}

.intro-stats {
  display: flex;
  gap: 2rem;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--clr-border);
}

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

.stat-number {
  font-family: var(--ff-heading);
  font-size: var(--fs-3xl);
  font-weight: 700;
  color: var(--clr-primary);
  line-height: 1;
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: var(--fs-sm);
  color: var(--clr-muted);
}

/* ============================================
   HOME - VALUES
   ============================================ */
.values-section {
  background-color: var(--clr-bg);
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.value-card {
  background-color: var(--clr-surface);
  border-radius: var(--radius);
  padding: 2rem 1.75rem;
  border: 1px solid var(--clr-border);
  transition: var(--transition);
}

.value-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}

.value-icon {
  width: 52px;
  height: 52px;
  background-color: rgba(92,122,78,0.12);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--clr-primary);
}

.value-card h4 {
  font-size: var(--fs-xl);
  margin-bottom: 0.5rem;
}

.value-card p {
  font-size: var(--fs-sm);
}

/* ============================================
   ABOUT PAGE
   ============================================ */
.about-story {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}

.about-image {
  aspect-ratio: 3/4;
  background: linear-gradient(160deg, #D4E6C8, #E8D8C0);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-primary);
}

.about-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.team-card {
  text-align: center;
  background-color: var(--clr-surface);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  border: 1px solid var(--clr-border);
}

.team-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, #A8C49A, #C8DCBA);
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  overflow: hidden;
}

.team-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.team-card h4 {
  font-size: var(--fs-lg);
  margin-bottom: 0.25rem;
}

.team-card .role {
  font-size: var(--fs-sm);
  color: var(--clr-primary);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.team-card p {
  font-size: var(--fs-sm);
}

/* ============================================
   ACTIVITIES PAGE
   ============================================ */
.activities-filter {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.filter-btn {
  padding: 0.4rem 1.1rem;
  border-radius: 50px;
  font-size: var(--fs-sm);
  font-weight: 600;
  border: 1.5px solid var(--clr-border);
  background: transparent;
  color: var(--clr-muted);
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--ff-body);
}

.filter-btn:hover,
.filter-btn.active {
  border-color: var(--clr-primary);
  color: var(--clr-primary);
  background-color: rgba(92,122,78,0.08);
}

/* ============================================
   CONTACT PAGE
   ============================================ */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 4rem;
  align-items: start;
}

.contact-info h3 {
  font-size: var(--fs-2xl);
  margin-bottom: 1rem;
}

.contact-info > p {
  margin-bottom: 2rem;
}

.contact-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 1.5rem;
}

.contact-item-icon {
  width: 44px;
  height: 44px;
  background-color: rgba(92,122,78,0.12);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-primary);
  flex-shrink: 0;
}

.contact-item-body h4 {
  font-size: var(--fs-base);
  margin-bottom: 0.2rem;
}

.contact-item-body p {
  font-size: var(--fs-sm);
}

/* Form */
.form-card {
  background-color: var(--clr-surface);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  border: 1px solid var(--clr-border);
  box-shadow: var(--shadow);
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--clr-text);
  margin-bottom: 0.4rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--clr-border);
  border-radius: var(--radius-sm);
  background-color: var(--clr-bg);
  color: var(--clr-text);
  font-size: var(--fs-base);
  font-family: var(--ff-body);
  transition: var(--transition);
  outline: none;
}

.form-control:focus {
  border-color: var(--clr-primary);
  background-color: var(--clr-white);
  box-shadow: 0 0 0 3px rgba(92,122,78,0.12);
}

.form-control::placeholder {
  color: var(--clr-border);
}

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

select.form-control {
  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='%237A6E63' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

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

/* ============================================
   FOOTER
   ============================================ */
footer {
  background-color: var(--clr-primary-dk);
  color: rgba(255,255,255,0.85);
  margin-top: auto;
}

.footer-main {
  padding: 4rem 0 3rem;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 3rem;
}

.footer-brand-name {
  font-family: var(--ff-heading);
  font-size: var(--fs-xl);
  color: var(--clr-white);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-desc {
  font-size: var(--fs-sm);
  color: rgba(255,255,255,0.6);
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.footer-social {
  display: flex;
  gap: 0.75rem;
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background-color: rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.7);
  transition: var(--transition);
}

.footer-social a:hover {
  background-color: rgba(255,255,255,0.2);
  color: var(--clr-white);
}

.footer-col h4 {
  font-size: var(--fs-base);
  color: var(--clr-white);
  margin-bottom: 1rem;
}

.footer-col ul li {
  margin-bottom: 0.6rem;
}

.footer-col ul li a {
  font-size: var(--fs-sm);
  color: rgba(255,255,255,0.6);
  transition: var(--transition);
}

.footer-col ul li a:hover {
  color: var(--clr-white);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 1.25rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--fs-sm);
  color: rgba(255,255,255,0.4);
}

/* ============================================
   DIVIDER
   ============================================ */
.divider {
  height: 1px;
  background-color: var(--clr-border);
  margin: 0;
}

/* ============================================
   SCROLL ANIMATIONS
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 900px) {
  h1 { font-size: var(--fs-3xl); }
  h2 { font-size: var(--fs-2xl); }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .hero-visual {
    order: -1;
  }

  .hero-illustration {
    max-width: 280px;
  }

  .intro-inner,
  .about-story,
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .footer-main {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .footer-main > *:first-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 600px) {
  :root {
    --fs-4xl: 2.25rem;
    --fs-3xl: 1.75rem;
  }

  .section { padding: 3.5rem 0; }

  .navbar-links { display: none; }
  .hamburger { display: flex; }

  .grid-3,
  .values-grid,
  .team-grid {
    grid-template-columns: 1fr;
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
  }

  .intro-stats {
    gap: 1.25rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-main {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }
}