/* ========================================
   Common CSS - 知心会
   Author: SOEL design
======================================== */

/* ----------------------------------------
   Variables
---------------------------------------- */
:root {
  /* Colors */
  --c-shironeri: #F3F3F2;
  --c-sumi: #343434;
  --c-ainezu: #6A7F8F;
  --c-shiraai: #C1D8E5;
  --c-dark: #2a3a4a;
  --c-white: #ffffff;
  --c-border: #e5e5e5;
  --c-gray: #666666;
  --c-gray-lt: #888888;
  --c-gray-ltr: #999999;

  /* Typography */
  --ff-sans: 'Noto Sans JP', sans-serif;
  --ff-serif: 'Shippori Mincho', serif;
  --fs-xs: 11px;
  --fs-sm: 13px;
  --fs-base: 15px;
  --fs-md: 17px;
  --fs-lg: 20px;
  --fs-xl: 24px;
  --fs-2xl: 28px;
  --fs-3xl: 32px;
  --fs-4xl: 38px;

  /* Spacing */
  --sp-xs: 10px;
  --sp-sm: 15px;
  --sp-md: 20px;
  --sp-lg: 30px;
  --sp-xl: 40px;
  --sp-2xl: 60px;
  --sp-3xl: 80px;
  --sp-4xl: 120px;

  /* Layout */
  --w-cont: 1100px;
  --w-narrow: 800px;

  /* Transition */
  --tr-fast: 0.2s ease;
  --tr-base: 0.3s ease;
  --tr-slow: 0.4s ease;
}

/* ----------------------------------------
   Base
---------------------------------------- */
body {
  font-family: var(--ff-sans);
  font-size: var(--fs-base);
  line-height: 2;
  color: var(--c-sumi);
  background: var(--c-shironeri);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--ff-serif);
  font-weight: 500;
  line-height: 1.6;
}

a {
  transition: var(--tr-base);
}

a:hover {
  opacity: 0.8;
}

/* ----------------------------------------
   Layout
---------------------------------------- */
.l-wrap {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.l-main {
  flex: 1;
  padding-top: 80px;
}

.l-cont {
  max-width: var(--w-cont);
  margin: 0 auto;
  padding: 0 var(--sp-xl);
}

.l-cont-narrow {
  max-width: var(--w-narrow);
  margin: 0 auto;
  padding: 0 var(--sp-xl);
}

/* Container (alias) */
.container {
  max-width: var(--w-cont);
  margin: 0 auto;
  padding: 0 var(--sp-xl);
}

/* ----------------------------------------
   Header
---------------------------------------- */
.l-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--sp-md) var(--sp-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 rgba(0,0,0,0.05);
}

.l-header-logo {
  font-family: var(--ff-serif);
  font-size: 22px;
  letter-spacing: 0.15em;
  color: var(--c-sumi);
}

.l-header-logo:hover {
  opacity: 1;
}

.l-header-nav {
  display: flex;
  gap: var(--sp-lg);
  align-items: center;
}

/* WordPress メニュー対応 */
.l-header-nav > ul,
.l-header-nav .menu {
  display: flex;
  gap: var(--sp-lg);
  list-style: none;
  margin: 0;
  padding: 0;
  align-items: center;
}

.l-header-nav li,
.l-header-nav .menu-item {
  position: relative;
  list-style: none;
}

.l-header-nav a {
  font-size: var(--fs-sm);
  color: var(--c-sumi);
  opacity: 0.8;
  white-space: nowrap;
}

.l-header-nav a:hover {
  opacity: 1;
}

/* サブメニュー（ドロップダウン） */
.l-header-nav .sub-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 180px;
  background: #fff;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
  padding: 10px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.3s ease;
  z-index: 100;
  display: block;
}

.l-header-nav .menu-item:hover > .sub-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.l-header-nav .sub-menu li {
  display: block;
}

.l-header-nav .sub-menu a {
  display: block;
  padding: 8px 20px;
  font-size: 13px;
}

.l-header-nav .sub-menu a:hover {
  background: var(--c-shironeri);
}

/* Mobile Menu Toggle */
.l-header-toggle {
  display: none;
  width: 30px;
  height: 24px;
  flex-direction: column;
  justify-content: space-between;
}

.l-header-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--c-sumi);
  transition: var(--tr-base);
}

.l-header-toggle.is-active span:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
}

.l-header-toggle.is-active span:nth-child(2) {
  opacity: 0;
}

.l-header-toggle.is-active span:nth-child(3) {
  transform: rotate(-45deg) translate(8px, -8px);
}

/* ----------------------------------------
   Footer
---------------------------------------- */
.l-footer {
  background: var(--c-sumi);
  color: var(--c-shironeri);
  padding: 90px var(--sp-xl) var(--sp-xl);
  position: relative;
}

.l-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, transparent 0%, var(--c-ainezu) 20%, var(--c-shiraai) 50%, var(--c-ainezu) 80%, transparent 100%);
  opacity: 0.6;
}

.l-footer-inner {
  max-width: var(--w-cont);
  margin: 0 auto;
}

.l-footer-main {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--sp-3xl);
  padding-bottom: var(--sp-2xl);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.l-footer-brand h3 {
  font-size: var(--fs-xl);
  letter-spacing: 0.2em;
  margin-bottom: 25px;
}

.l-footer-brand p {
  font-size: var(--fs-sm);
  opacity: 0.65;
  line-height: 2.1;
}

.l-footer-nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-xl);
}

.l-footer-nav-group h4 {
  font-size: var(--fs-xs);
  letter-spacing: 0.15em;
  margin-bottom: 22px;
  opacity: 0.5;
}

.l-footer-nav-group li {
  margin-bottom: 14px;
}

.l-footer-nav-group a {
  font-size: 14px;
  opacity: 0.75;
}

.l-footer-nav-group a:hover {
  opacity: 1;
}

.l-footer-bottom {
  padding-top: var(--sp-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.l-footer-copy {
  font-size: var(--fs-xs);
  opacity: 0.4;
}

.l-footer-sns {
  display: flex;
  gap: var(--sp-sm);
}

.l-footer-sns a {
  width: 38px;
  height: 38px;
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-xs);
}

.l-footer-sns a:hover {
  background: var(--c-shironeri);
  color: var(--c-sumi);
  opacity: 1;
}

/* ----------------------------------------
   Section
---------------------------------------- */
.sec {
  padding: var(--sp-4xl) var(--sp-xl);
  position: relative;
}

.sec-header {
  text-align: center;
  margin-bottom: 70px;
}

.sec-lbl {
  font-size: var(--fs-xs);
  letter-spacing: 0.3em;
  color: var(--c-ainezu);
  margin-bottom: var(--sp-sm);
}

.sec-ttl {
  font-size: clamp(var(--fs-xl), 3vw, var(--fs-3xl));
  letter-spacing: 0.15em;
}

.sec-lead {
  margin-top: 25px;
  font-size: var(--fs-base);
  color: var(--c-gray);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Section BG */
.sec--white {
  background: var(--c-white);
}

.sec--dark {
  background: var(--c-dark);
  color: var(--c-shironeri);
}

.sec--dark .sec-lbl {
  color: var(--c-shiraai);
}

/* ----------------------------------------
   Page Header
---------------------------------------- */
.pg-header {
  padding: var(--sp-4xl) var(--sp-xl) var(--sp-3xl);
  text-align: center;
  background: var(--c-white);
  position: relative;
}

.pg-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--c-ainezu), transparent);
}

.pg-lbl {
  font-size: var(--fs-xs);
  letter-spacing: 0.3em;
  color: var(--c-ainezu);
  margin-bottom: var(--sp-sm);
}

.pg-ttl {
  font-size: clamp(var(--fs-2xl), 4vw, var(--fs-4xl));
  letter-spacing: 0.15em;
}

.pg-lead {
  margin-top: var(--sp-md);
  font-size: 14px;
  color: var(--c-gray);
}

/* ----------------------------------------
   Buttons
---------------------------------------- */
.btn {
  display: inline-block;
  padding: 18px 50px;
  font-family: var(--ff-serif);
  font-size: 14px;
  letter-spacing: 0.2em;
  text-align: center;
  cursor: pointer;
  transition: var(--tr-slow);
  position: relative;
  overflow: hidden;
}

.btn-ol {
  color: var(--c-ainezu);
  border: 1px solid var(--c-ainezu);
  background: transparent;
}

.btn-ol::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background: var(--c-ainezu);
  transition: var(--tr-slow);
  z-index: -1;
}

.btn-ol:hover {
  color: var(--c-white);
  opacity: 1;
}

.btn-ol:hover::before {
  width: 100%;
}

.btn-fill {
  color: var(--c-white);
  background: var(--c-ainezu);
  border: 1px solid var(--c-ainezu);
}

.btn-fill:hover {
  background: var(--c-dark);
  border-color: var(--c-dark);
  opacity: 1;
}

/* Button White (for dark bg) */
.btn-ol--white {
  color: var(--c-shironeri);
  border-color: rgba(255,255,255,0.4);
}

.btn-ol--white::before {
  background: var(--c-shironeri);
}

.btn-ol--white:hover {
  color: var(--c-dark);
}

/* ----------------------------------------
   Cards
---------------------------------------- */
.card {
  background: var(--c-white);
  transition: var(--tr-slow);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.1);
}

.card-img {
  overflow: hidden;
}

.card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--tr-slow);
}

.card:hover .card-img img {
  transform: scale(1.05);
}

.card-body {
  padding: 25px;
}

.card-ttl {
  font-size: var(--fs-md);
  letter-spacing: 0.03em;
  line-height: 1.6;
  margin-bottom: 12px;
}

.card-txt {
  font-size: var(--fs-sm);
  color: var(--c-gray);
}

.card-meta {
  font-size: var(--fs-xs);
  color: var(--c-gray-ltr);
}

/* ----------------------------------------
   Form
---------------------------------------- */
.form-group {
  margin-bottom: var(--sp-lg);
}

.form-lbl {
  display: block;
  font-size: var(--fs-sm);
  font-weight: 500;
  margin-bottom: var(--sp-xs);
}

.form-lbl .req {
  color: #c77;
  font-size: var(--fs-xs);
  margin-left: 5px;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 15px 20px;
  font-size: var(--fs-base);
  border: 1px solid var(--c-border);
  background: var(--c-white);
  transition: var(--tr-base);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--c-ainezu);
  box-shadow: 0 0 0 3px rgba(106, 127, 143, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--c-gray-ltr);
  font-weight: 300;
}

.form-textarea {
  min-height: 200px;
  resize: vertical;
}

.form-note {
  font-size: var(--fs-xs);
  color: var(--c-gray-lt);
  margin-top: 8px;
}

/* Radio & Checkbox */
.form-radio,
.form-check {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}

.form-radio input,
.form-check input {
  width: 18px;
  height: 18px;
  accent-color: var(--c-ainezu);
}

/* ----------------------------------------
   Table
---------------------------------------- */
.tbl {
  width: 100%;
  background: var(--c-white);
}

.tbl th,
.tbl td {
  padding: 20px 25px;
  border-bottom: 1px solid var(--c-border);
  text-align: left;
  vertical-align: top;
}

.tbl th {
  width: 200px;
  background: var(--c-shironeri);
  font-size: var(--fs-sm);
  font-weight: 500;
}

.tbl td {
  font-size: var(--fs-base);
}

/* ----------------------------------------
   Tags
---------------------------------------- */
.tag {
  display: inline-block;
  font-size: var(--fs-xs);
  letter-spacing: 0.1em;
  padding: 4px 14px;
  background: var(--c-shiraai);
  color: var(--c-ainezu);
}

/* ----------------------------------------
   Utilities
---------------------------------------- */
.u-tac { text-align: center; }
.u-tar { text-align: right; }
.u-mt0 { margin-top: 0; }
.u-mt20 { margin-top: 20px; }
.u-mt30 { margin-top: 30px; }
.u-mt40 { margin-top: 40px; }
.u-mt50 { margin-top: 50px; }
.u-mt60 { margin-top: 60px; }
.u-mt80 { margin-top: 80px; }
.u-mb0 { margin-bottom: 0; }
.u-mb20 { margin-bottom: 20px; }
.u-mb30 { margin-bottom: 30px; }
.u-mb40 { margin-bottom: 40px; }

/* ----------------------------------------
   Animation
---------------------------------------- */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.fade-delay-1 { transition-delay: 0.1s; }
.fade-delay-2 { transition-delay: 0.2s; }
.fade-delay-3 { transition-delay: 0.3s; }

/* ----------------------------------------
   Responsive
---------------------------------------- */
@media (max-width: 1000px) {
  .l-footer-main {
    grid-template-columns: 1fr;
    gap: var(--sp-xl);
  }
}

@media (max-width: 768px) {
  :root {
    --sp-xl: 20px;
  }

  .sec {
    padding: var(--sp-3xl) var(--sp-md);
  }

  .pg-header {
    padding: 140px var(--sp-md) var(--sp-2xl);
  }

  .l-header {
    padding: var(--sp-sm) var(--sp-md);
  }

  .l-header-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--c-white);
    flex-direction: column;
    padding: var(--sp-md);
    gap: 0;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  }

  .l-header-nav.is-active {
    display: flex;
  }

  .l-header-nav > ul,
  .l-header-nav .menu {
    flex-direction: column;
    gap: 0;
    width: 100%;
  }

  .l-header-nav li,
  .l-header-nav .menu-item {
    width: 100%;
  }

  .l-header-nav a {
    padding: var(--sp-sm) 0;
    border-bottom: 1px solid var(--c-border);
    display: block;
  }

  .l-header-nav .sub-menu {
    position: static;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    transform: none;
    padding: 0;
    padding-left: 15px;
    background: transparent;
  }

  .l-header-nav .sub-menu a {
    padding: var(--sp-sm) 0;
    font-size: var(--fs-sm);
  }

  .l-header-toggle {
    display: flex;
  }

  .l-footer {
    padding: var(--sp-2xl) var(--sp-md) var(--sp-lg);
  }

  .l-footer-nav {
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-lg);
  }

  .l-footer-bottom {
    flex-direction: column;
    gap: var(--sp-md);
  }

  .tbl th,
  .tbl td {
    display: block;
    width: 100%;
  }

  .tbl th {
    border-bottom: none;
    padding-bottom: 10px;
  }

  .tbl td {
    padding-top: 0;
  }
}