@charset "UTF-8";

/* ==========================================================================
   Aero Elegance Design System
   エアラインスクール相談センター スタイルシート
   ========================================================================== */

:root {
  /* Color Palette */
  --color-primary: #1B365D;
  --color-secondary: #0066B2;
  --color-bg-base: #F4F8FC;
  --color-card-bg: #FFFFFF;
  --color-card-border: #D8E5F3;
  --color-alert: #D9386E;
  --color-alert-bg: #FDF2F4;
  --color-text-main: #212B36;
  --color-text-sub: #5A6E85;
  --color-footer-bg: #0F172A;
  --color-footer-text: #94A3B8;
  --color-footer-sub: #64748B;
  --color-required: #E11D48;

  /* Gradients */
  --grad-fv: linear-gradient(135deg, #1B365D 0%, #0066B2 70%, #38BDF8 100%);
  --grad-cta: linear-gradient(135deg, #FF8C00 0%, #FF5500 100%);
  --grad-cta-hover: linear-gradient(135deg, #E67300 0%, #E63D00 100%);
  --grad-icon-bg: linear-gradient(135deg, #E0F2FE 0%, #BAE6FD 100%);
  --grad-accent-bar: linear-gradient(90deg, #1B365D, #0066B2, #38BDF8);

  /* Typography */
  --font-family-base: 'Zen Kaku Gothic New', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-family-en: 'Poppins', 'Montserrat', sans-serif;

  /* Sizing & Radius */
  --radius-card: 14px;
  --radius-button: 12px;
  --radius-tag: 6px;
  --radius-input: 8px;

  /* Shadows */
  --shadow-card: 0 8px 24px rgba(27, 54, 93, 0.07);
  --shadow-card-hover: 0 12px 32px rgba(27, 54, 93, 0.12);
  --shadow-cta: 0 8px 20px rgba(255, 85, 0, 0.35);
  --shadow-cta-hover: 0 12px 28px rgba(255, 85, 0, 0.45);
  --shadow-box: 0 6px 18px rgba(27, 54, 93, 0.06);

  /* Max widths */
  --width-max: 1920px;
  --width-inner: 1080px;
  --width-form: 680px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family-base);
  color: var(--color-text-main);
  background-color: var(--color-bg-base);
  line-height: 1.75;
  letter-spacing: 0.02em;
  max-width: var(--width-max);
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.2s ease;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--width-inner);
  margin: 0 auto;
  padding: 0 16px;
}

@media (max-width: 480px) {
  .container {
    padding: 0 12px;
  }
}

/* ==========================================================================
   Header (完全レスポンシブ対応)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-card-border);
  box-shadow: 0 2px 10px rgba(27, 54, 93, 0.05);
}

/* モバイル初期状態（〜575px）: 4要素縦並び */
.header-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 12px 16px;
  gap: 8px;
  text-align: center;
}

.site-title {
  font-size: clamp(1rem, 4.5vw, 1.25rem); /* スマホで絶妙に改行されない流動サイズ */
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
  white-space: nowrap; /* 途中で改行させない */
}

.header-badge-group {
  display: flex;
  flex-direction: column; /* 最も狭い時は縦並び */
  align-items: center;
  gap: 6px;
  width: 100%;
}

.header-badge {
  font-size: 0.75rem; /* 12px */
  font-weight: 600;
  color: var(--color-secondary);
  background: var(--grad-icon-bg);
  padding: 3px 10px;
  border-radius: var(--radius-tag);
  border: 1px solid #BAE6FD;
  white-space: nowrap;
}

.header-cta {
  width: 100%;
  display: flex;
  justify-content: center;
}

.header-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--grad-cta);
  color: #FFFFFF;
  font-weight: 700;
  font-size: 0.875rem; /* 14px */
  padding: 8px 20px;
  border-radius: var(--radius-button);
  box-shadow: var(--shadow-cta);
  white-space: nowrap;
  min-height: 40px;
  width: 100%;
  max-width: 280px;
  border: none;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
}

/* 中間幅（576px〜1023px）: 折り返し調整 */
@media (min-width: 576px) {
  .header-inner {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-between;
    padding: 12px 20px;
  }

  .header-badge-group {
    flex-direction: row;
    width: auto;
  }

  .header-cta {
    width: auto;
  }

  .header-cta-btn {
    width: auto;
  }
}

/* PC幅（1024px〜）: 完全横一列並び */
@media (min-width: 1024px) {
  .header-inner {
    flex-wrap: nowrap;
    justify-content: space-between;
    padding: 14px 24px;
    gap: 16px;
  }

  .site-title {
    font-size: 1.35rem; /* 21.6px */
  }

  .header-badge-group {
    gap: 8px;
  }

  .header-badge {
    font-size: 0.8125rem; /* 13px */
  }
}

.header-cta-btn:hover {
  background: var(--grad-cta-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-cta-hover);
}

.header-cta-btn:active {
  transform: scale(0.98);
}

/* ==========================================================================
   First View (FV)
   ========================================================================== */
.fv-section {
  position: relative;
  background-image: url('./in-flight_3-on-1.webp');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  color: #FFFFFF;
  padding: 48px 16px 56px;
  text-align: center;
  overflow: hidden;
}

.fv-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-color: rgba(27, 54, 93, 0.4);
  z-index: 1;
}

@media (min-width: 768px) {
  .fv-section {
    padding: 72px 24px 80px;
  }
}

.fv-pattern {
  position: absolute;
  inset: 0;
  opacity: 0.08;
  background-image: radial-gradient(circle at 2px 2px, #FFFFFF 1px, transparent 0);
  background-size: 32px 32px;
  pointer-events: none;
}

.fv-content {
  position: relative;
  z-index: 2;
  max-width: 1000px;
  margin: 0 auto;
}

.fv-alert-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--color-alert);
  color: #FFFFFF;
  font-size: 0.8125rem;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 9999px;
  margin-bottom: 20px;
  box-shadow: 0 4px 12px rgba(217, 56, 110, 0.4);
}

.fv-alert-icon {
  width: 16px;
  height: 16px;
  stroke: currentColor;
}

.fv-title {
  font-size: 1.625rem; /* 26px */
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 20px;
  letter-spacing: -0.01em;
  color: #FFFFFF;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.fv-title-emphasis {
  display: block;
  font-size: 1.75rem; /* 28px */
  color: #FFE600;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
  margin-top: 4px;
}

@media (min-width: 768px) {
  .fv-title {
    font-size: 2.25rem; /* 36px */
  }
  .fv-title-emphasis {
    font-size: 2.5rem; /* 40px */
    display: inline;
    margin-top: 0;
  }
}

.fv-lead {
  font-size: 0.9375rem; /* 15px */
  font-weight: 500;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.95);
  background-color: rgba(15, 23, 42, 0.35);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: 16px 20px;
  border-radius: var(--radius-card);
  border: 1px solid rgba(255, 255, 255, 0.15);
  text-align: center;
  max-width: 820px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .fv-lead {
    font-size: 1.0625rem; /* 17px */
    padding: 20px 28px;
  }
}

/* ==========================================================================
   Section Common
   ========================================================================== */
.main-content {
  flex: 1 0 auto;
}

.content-section {
  padding: 48px 0;
}

@media (min-width: 768px) {
  .content-section {
    padding: 72px 0;
  }
}

.section-header {
  text-align: center;
  margin-bottom: 32px;
}

@media (min-width: 768px) {
  .section-header {
    margin-bottom: 48px;
  }
}

.section-title {
  font-size: 1.375rem; /* 22px */
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.4;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

@media (min-width: 768px) {
  .section-title {
    font-size: 1.875rem; /* 30px */
  }
}

.alert-subheading {
  display: inline-block;
  color: var(--color-alert);
  background-color: var(--color-alert-bg);
  border: 1px solid #FECDD3;
  padding: 6px 16px;
  border-radius: 9999px;
  font-weight: 700;
  font-size: 0.9375rem; /* 15px */
}

@media (min-width: 768px) {
  .alert-subheading {
    font-size: 1rem;
  }
}

/* ==========================================================================
   Content 1: 5つの特徴 (Cards)
   ========================================================================== */
.features-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  width: 100%;
}

@media (min-width: 601px) {
  .features-grid {
    gap: 24px;
  }
}

.feature-card {
  width: 100%;
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-card);
  padding: 20px;
  box-shadow: var(--shadow-card);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  display: flex;
  flex-direction: column;
}

@media (min-width: 768px) {
  .feature-card {
    padding: 24px;
  }
}

@media (min-width: 601px) and (max-width: 1023px) {
  .feature-card {
    width: calc(50% - 12px);
  }
}

@media (min-width: 1024px) {
  .feature-card {
    width: calc(33.333% - 16px);
  }
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: #BAE6FD;
}

.feature-card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid #EDF2F7;
}

.feature-icon-wrapper {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--grad-icon-bg);
  border: 1px solid #90CDF4;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.feature-icon {
  width: 24px;
  height: 24px;
  color: var(--color-secondary);
}

.feature-title {
  font-size: 1.125rem; /* 18px */
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.35;
}

@media (min-width: 768px) {
  .feature-title {
    font-size: 1.25rem; /* 20px */
  }
}

.feature-desc {
  font-size: 0.9375rem; /* 15px */
  color: var(--color-text-main);
  line-height: 1.75;
  flex: 1;
}

/* ==========================================================================
   Content 2: メッセージ
   ========================================================================== */
.message-section {
  background-color: #FFFFFF;
  border-top: 1px solid var(--color-card-border);
  border-bottom: 1px solid var(--color-card-border);
}

.message-box {
  background-color: #FFFFFF;
  border: 1px solid var(--color-card-border);
  border-left: 6px solid var(--color-secondary);
  border-radius: 12px;
  padding: 24px 20px;
  box-shadow: var(--shadow-box);
  margin-bottom: 32px;
}

@media (min-width: 768px) {
  .message-box {
    padding: 32px 36px;
    margin-bottom: 40px;
  }
}

.message-text {
  font-size: 1rem; /* 16px */
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.8;
  letter-spacing: 0.01em;
  text-align: center;
}

@media (min-width: 768px) {
  .message-text {
    font-size: 1.125rem; /* 18px */
  }
}

.recommend-container {
  background: linear-gradient(135deg, #F0F9FF 0%, #E0F2FE 100%);
  border: 1px solid #BAE6FD;
  border-radius: var(--radius-card);
  padding: 24px 20px;
  text-align: center;
  box-shadow: var(--shadow-box);
}

@media (min-width: 768px) {
  .recommend-container {
    padding: 32px 28px;
  }
}

.recommend-heading {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-secondary);
  margin-bottom: 8px;
  letter-spacing: 0.05em;
}

.recommend-school-name {
  font-size: 1.25rem; /* 20px */
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

@media (min-width: 768px) {
  .recommend-school-name {
    font-size: 1.5rem; /* 24px */
  }
}

.recommend-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-secondary);
  font-family: var(--font-family-en);
  font-weight: 600;
  font-size: 0.9375rem;
  word-break: break-all;
  border-bottom: 1.5px solid var(--color-secondary);
  padding-bottom: 2px;
}

.recommend-link:hover {
  color: #0369A1;
  border-color: #0369A1;
}

/* ==========================================================================
   Content 3: お問い合わせ窓口
   ========================================================================== */
.contact-lead-box {
  background-color: #FFFFFF;
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-card);
  padding: 20px;
  margin-bottom: 36px;
  text-align: center;
  box-shadow: var(--shadow-box);
}

@media (min-width: 768px) {
  .contact-lead-box {
    padding: 24px 32px;
  }
}

.contact-lead-text {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text-main);
  line-height: 1.8;
}

@media (min-width: 768px) {
  .contact-lead-text {
    font-size: 1.0625rem;
  }
}

.form-wrapper {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-card);
  padding: 24px 20px;
  box-shadow: var(--shadow-card);
  max-width: var(--width-form);
  margin: 0 auto 48px;
}

@media (min-width: 768px) {
  .form-wrapper {
    padding: 36px 40px;
  }
}

.form-title {
  font-size: 1.25rem; /* 20px */
  font-weight: 700;
  color: var(--color-primary);
  text-align: center;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--color-bg-base);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.form-group {
  margin-bottom: 22px;
}

.form-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--color-primary);
}

.required-badge {
  background-color: var(--color-required);
  color: #FFFFFF;
  font-size: 0.6875rem; /* 11px */
  font-weight: 700;
  padding: 2px 6px;
  border-radius: var(--radius-tag);
  letter-spacing: 0.05em;
}

.form-control {
  width: 100%;
  padding: 12px 14px;
  font-size: 1rem;
  font-family: inherit;
  color: var(--color-text-main);
  background-color: #FFFFFF;
  border: 1.5px solid var(--color-card-border);
  border-radius: var(--radius-input);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  min-height: 48px;
}

.form-control:focus {
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(0, 102, 178, 0.15);
}

.form-control.input-error {
  border-color: var(--color-required);
  background-color: #FFF5F5;
}

textarea.form-control {
  min-height: 120px;
  resize: vertical;
}

.error-message {
  color: var(--color-required);
  font-size: 0.8125rem; /* 13px */
  font-weight: 600;
  margin-top: 6px;
  display: none;
}

.form-submit-btn {
  width: 100%;
  padding: 14px 28px;
  font-size: 1.0625rem; /* 17px */
  font-weight: 700;
  color: #FFFFFF;
  background: var(--grad-cta);
  border: none;
  border-radius: var(--radius-button);
  cursor: pointer;
  box-shadow: var(--shadow-cta);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  min-height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.form-submit-btn:hover {
  background: var(--grad-cta-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-cta-hover);
}

.form-submit-btn:active {
  transform: scale(0.98);
}

.other-channels-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  max-width: var(--width-form);
  margin: 0 auto;
}

@media (min-width: 601px) {
  .other-channels-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.channel-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-card);
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow-box);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.channel-icon {
  width: 40px;
  height: 40px;
  margin-bottom: 12px;
  color: var(--color-secondary);
}

.channel-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.channel-email-link {
  color: var(--color-secondary);
  font-weight: 600;
  font-size: 0.9375rem;
  word-break: break-all;
  border-bottom: 1px dashed var(--color-secondary);
  padding-bottom: 2px;
}

.channel-email-link:hover {
  color: #0369A1;
}

.qr-code-image img {
  max-width: 150px;
  height: auto;
  display: block;
  margin: 0 auto;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding: 40px 16px 28px;
  margin-top: auto;
  font-size: 0.75rem; /* 12px */
  line-height: 1.6;
}

@media (min-width: 768px) {
  .site-footer {
    padding: 56px 24px 36px;
    font-size: 0.8125rem; /* 13px */
  }
}

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

.footer-company-box {
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 24px;
}

@media (min-width: 768px) {
  .footer-company-box {
    padding: 24px 28px;
  }
}

.footer-section-title {
  color: #FFFFFF;
  font-size: 0.9375rem;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}

.footer-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-list-item {
  color: var(--color-footer-text);
}

.footer-list-item a {
  color: #38BDF8;
  text-decoration: underline;
}

.footer-list-item a:hover {
  color: #7DD3FC;
}

.footer-copyright {
  text-align: center;
  color: var(--color-footer-sub);
  font-size: 0.75rem;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

/* ==========================================================================
   Spacer Image
   ========================================================================== */
.spacer-image {
  width: 100%;
  line-height: 0;
  background-color: var(--color-bg-base);
}

.spacer-image img {
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  display: block;
}

/* Utility */
@media (min-width: 1024px) {
  .br-sp {
    display: none;
  }
}