/* ============================================================
   LP-19: Strategos — Executive Strategy Consulting
   Design: Extreme minimalism. Black × White × Gold (sparingly).
   Typography: Playfair Display (headings) + Inter (body).
   ============================================================ */

/* --- Tokens --- */
:root {
  --color-primary: #000000;
  --color-accent: #D4AF37;
  --color-bg: #FFFFFF;
  --color-bg-alt: #FAFAFA;
  --color-text: #111111;
  --color-text-muted: #6B7280;
  --color-border: #E5E7EB;

  --font-heading: "Playfair Display", "Georgia", serif;
  --font-body: "Inter", "Helvetica Neue", Arial, sans-serif;

  --section-padding: 140px 0;
  --container-width: 1080px;
  --container-narrow: 640px;
  --transition: 0.5s cubic-bezier(0.23, 1, 0.32, 1);
}

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

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

body {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 300;
  line-height: 1.9;
  color: var(--color-text);
  background-color: var(--color-bg);
  opacity: 0;
  animation: bodyFadeIn 1s ease forwards;
}

@keyframes bodyFadeIn {
  to { opacity: 1; }
}

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

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

ul {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

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

/* --- Layout --- */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 40px;
}

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

/* --- Hamburger & Mobile Menu --- */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 4px;
  z-index: 10;
}

.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: all 0.3s;
}

.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
  z-index: 1000;
}

.overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 80%;
  max-width: 360px;
  height: 100vh;
  background: var(--color-bg);
  transition: right 0.3s ease;
  z-index: 1001;
  padding: 24px;
  display: flex;
  flex-direction: column;
}

.mobile-menu.open {
  right: 0;
}

.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}

.mobile-menu-logo {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--color-text);
}

.mobile-close {
  background: none;
  border: none;
  color: var(--color-text);
  padding: 4px;
}

.mobile-link {
  display: block;
  padding: 14px 0;
  font-size: 15px;
  font-weight: 400;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  letter-spacing: 0.04em;
}

.mobile-link:hover {
  color: var(--color-accent);
}

.mobile-cta {
  margin-top: 24px;
  background: var(--color-primary);
  color: #fff;
  text-align: center;
  border-bottom: none;
  padding: 14px;
}

.mobile-cta:hover {
  color: #fff;
  opacity: 0.75;
}

/* --- Scroll animation --- */
.fade-in {
  opacity: 0;
  transition: opacity 0.8s ease;
}

.fade-in.is-visible {
  opacity: 1;
}

/* --- Section title --- */
.section-title {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 400;
  letter-spacing: 0.04em;
  text-align: center;
  margin-bottom: 72px;
  color: var(--color-text);
}

.section-title--light {
  color: #FFFFFF;
}

/* ============================================================
   ① Hero
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: var(--color-bg);
}

.hero__header {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  padding: 40px 48px;
}

.hero__logo {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--color-text);
}

.hero__content {
  text-align: center;
  padding: 0 40px;
}

.hero__accent-line {
  width: 40px;
  height: 1px;
  background: var(--color-accent);
  margin: 0 auto 48px;
}

.hero__authority {
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 24px;
}

.hero__title {
  font-family: var(--font-heading);
  font-size: 36px;
  font-weight: 400;
  line-height: 1.7;
  letter-spacing: 0.06em;
  color: var(--color-text);
  margin-bottom: 28px;
}

.hero__sub {
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: 48px;
}

.hero__cta {
  display: inline-block;
  padding: 14px 40px;
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: #FFFFFF;
  background: var(--color-primary);
  transition: opacity var(--transition);
}

.hero__cta:hover {
  opacity: 0.75;
}

/* ============================================================
   ② Target
   ============================================================ */
.target {
  padding: var(--section-padding);
  background: var(--color-bg-alt);
}

.target__list {
  max-width: 720px;
  margin: 0 auto;
}

.target__item {
  padding: 24px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 15px;
  font-weight: 300;
  line-height: 1.8;
  letter-spacing: 0.02em;
  color: var(--color-text);
}

.target__item:first-child {
  border-top: 1px solid var(--color-border);
}

/* ============================================================
   ③ Consultants
   ============================================================ */
.consultants {
  padding: var(--section-padding);
  background: var(--color-bg);
}

.consultants__grid {
  display: flex;
  gap: 80px;
  justify-content: center;
}

.consultant {
  display: flex;
  gap: 32px;
  align-items: flex-start;
  max-width: 480px;
}

.consultant__portrait {
  width: 140px;
  min-width: 140px;
  height: 180px;
  overflow: hidden;
}

.consultant__portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%);
  transition: filter 0.6s ease;
}

.consultant:hover .consultant__portrait img {
  filter: grayscale(30%);
}

.consultant__info {
  padding-top: 4px;
}

.consultant__name {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 500;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}

.consultant__role {
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

.consultant__bio {
  font-size: 13px;
  font-weight: 300;
  line-height: 2;
  color: var(--color-text);
}

/* ============================================================
   ④ Services
   ============================================================ */
.services {
  padding: var(--section-padding);
  background: var(--color-bg-alt);
}

.services__grid {
  display: flex;
  gap: 1px;
  background: var(--color-border);
  max-width: 960px;
  margin: 0 auto;
}

.service {
  flex: 1;
  background: var(--color-bg-alt);
  padding: 48px 32px;
  text-align: center;
}

.service__title {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 0.06em;
  margin-bottom: 20px;
  color: var(--color-text);
}

.service__desc {
  font-size: 13px;
  font-weight: 300;
  line-height: 2;
  color: var(--color-text-muted);
}

/* ============================================================
   ⑤ Track Record
   ============================================================ */
.track-record {
  padding: var(--section-padding);
  background: #0A0A0A;
  color: #FFFFFF;
}

.track-record__grid {
  display: flex;
  justify-content: center;
  gap: 100px;
  margin-bottom: 64px;
}

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

.track-record__number {
  font-family: var(--font-heading);
  font-size: 56px;
  font-weight: 400;
  letter-spacing: 0.02em;
  display: block;
  line-height: 1.2;
}

.track-record__suffix {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 400;
  letter-spacing: 0.04em;
  display: inline-block;
  margin-top: 4px;
}

.track-record__label {
  display: block;
  font-size: 12px;
  font-weight: 300;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.5);
  margin-top: 16px;
}

.track-record__note {
  text-align: center;
  font-size: 11px;
  font-weight: 300;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.35);
}

/* ============================================================
   ⑥ Why Free
   ============================================================ */
.why-free {
  padding: var(--section-padding);
  background: var(--color-bg);
}

.why-free__body p {
  font-size: 15px;
  font-weight: 300;
  line-height: 2.2;
  color: var(--color-text);
  margin-bottom: 24px;
  text-align: center;
}

.why-free__body p:last-child {
  margin-bottom: 0;
}

.why-free__body strong {
  font-weight: 500;
  color: var(--color-accent);
}

.why-free__faq {
  margin-top: 56px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.why-free__item h3 {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--color-text);
}

.why-free__item p {
  font-size: 14px;
  font-weight: 300;
  line-height: 2;
  color: var(--color-text-muted);
}

/* ============================================================
   ⑦ Contact Form
   ============================================================ */
.contact {
  padding: var(--section-padding);
  background: var(--color-bg-alt);
}

.form {
  margin-top: 0;
}

.form__group {
  margin-bottom: 36px;
}

.form__label {
  display: block;
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: 10px;
}

.form__input,
.form__textarea {
  width: 100%;
  padding: 14px 0;
  font-size: 15px;
  font-weight: 300;
  color: var(--color-text);
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--color-border);
  outline: none;
  transition: border-color 0.3s ease;
  border-radius: 0;
  -webkit-appearance: none;
}

.form__input:focus,
.form__textarea:focus {
  border-bottom-color: var(--color-primary);
}

.form__textarea {
  resize: vertical;
  min-height: 120px;
  line-height: 1.8;
}

.form__submit-wrapper {
  text-align: center;
  margin-top: 56px;
}

.form__submit {
  display: inline-block;
  padding: 16px 56px;
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: #FFFFFF;
  background: var(--color-primary);
  border: 1px solid var(--color-primary);
  cursor: pointer;
  transition: all 0.3s ease;
}

.form__submit:hover {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-accent);
}

.form__note {
  text-align: center;
  font-size: 12px;
  font-weight: 300;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  margin-top: 32px;
}

/* Thanks */
.form__thanks {
  text-align: center;
  padding: 80px 0;
}

.form__thanks-title {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 400;
  letter-spacing: 0.04em;
  margin-bottom: 16px;
}

.form__thanks-text {
  font-size: 14px;
  font-weight: 300;
  color: var(--color-text-muted);
}

/* --- Thanks note --- */
.form__thanks-note {
  font-size: 12px;
  font-weight: 300;
  color: var(--color-text-muted);
  margin-top: 16px;
}

/* ============================================================
   Hero Urgency Badge
   ============================================================ */
.hero__urgency {
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  margin-top: 16px;
  margin-bottom: 8px;
}

/* ============================================================
   ④-b Case Studies
   ============================================================ */
.case-studies {
  padding: var(--section-padding);
  background: var(--color-bg-alt);
}

.case-studies__grid {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.case-study {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: 48px;
}

.case-study__label {
  display: inline-block;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  padding: 4px 16px;
  margin-bottom: 20px;
}

.case-study__title {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 500;
  letter-spacing: 0.02em;
  margin-bottom: 16px;
  color: var(--color-text);
}

.case-study__desc {
  font-size: 14px;
  font-weight: 300;
  line-height: 2;
  color: var(--color-text-muted);
  margin-bottom: 28px;
}

.case-study__result {
  display: flex;
  gap: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.case-study__metric {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.case-study__metric-value {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.02em;
}

.case-study__metric-label {
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
}

.case-studies__note {
  font-size: 12px;
  font-weight: 300;
  color: var(--color-text-muted);
  text-align: center;
  margin-top: 40px;
}

/* --- Case Studies responsive --- */
@media (max-width: 768px) {
  .case-study {
    padding: 32px 24px;
  }

  .case-study__title {
    font-size: 17px;
  }

  .case-study__result {
    gap: 32px;
  }

  .case-study__metric-value {
    font-size: 24px;
  }
}

@media (max-width: 480px) {
  .case-study {
    padding: 28px 20px;
  }

  .case-study__title {
    font-size: 16px;
  }

  .case-study__result {
    flex-wrap: wrap;
    gap: 24px;
  }

  .case-study__metric-value {
    font-size: 22px;
  }
}

/* ============================================================
   ⑧ Footer
   ============================================================ */
.footer {
  padding: 64px 0;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.footer__company {
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-align: center;
  margin-bottom: 24px;
  color: var(--color-text);
}

.footer__bottom {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 32px;
}

.footer__copy {
  font-size: 11px;
  font-weight: 300;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

.footer__link {
  font-size: 11px;
  font-weight: 300;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  transition: color 0.3s ease;
}

.footer__link:hover {
  color: var(--color-text);
}

/* ============================================================
   Back to top
   ============================================================ */
.back-to-top {
  position: fixed;
  bottom: 40px;
  right: 40px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease, visibility 0.4s ease;
  z-index: 100;
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  opacity: 0.7;
}

/* ============================================================
   Utility
   ============================================================ */
.sp-only {
  display: none;
}

/* ============================================================
   Responsive — 1024px
   ============================================================ */
@media (max-width: 1024px) {
  :root {
    --section-padding: 120px 0;
  }

  .consultants__grid {
    flex-direction: column;
    align-items: center;
    gap: 64px;
  }

  .consultant {
    max-width: 520px;
  }

  .services__grid {
    flex-wrap: wrap;
  }

  .service {
    flex: 1 1 calc(50% - 1px);
  }

  .track-record__grid {
    gap: 60px;
  }

  .track-record__number {
    font-size: 48px;
  }
}

/* ============================================================
   Responsive — 768px
   ============================================================ */
@media (max-width: 768px) {
  :root {
    --section-padding: 100px 0;
  }

  body {
    font-size: 14px;
  }

  .container {
    padding: 0 28px;
  }

  .section-title {
    font-size: 24px;
    margin-bottom: 56px;
  }

  .hamburger {
    display: flex;
  }

  .hero__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 28px 32px;
  }

  .hero__logo {
    font-size: 20px;
  }

  .hero__title {
    font-size: 28px;
    line-height: 1.8;
  }

  .hero__sub {
    font-size: 12px;
    margin-bottom: 40px;
  }

  .hero__accent-line {
    margin-bottom: 40px;
  }

  .sp-only {
    display: inline;
  }

  .consultant {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 24px;
  }

  .consultant__portrait {
    width: 120px;
    min-width: 120px;
    height: 155px;
  }

  .services__grid {
    flex-direction: column;
    background: transparent;
    gap: 0;
  }

  .service {
    padding: 36px 0;
    border-bottom: 1px solid var(--color-border);
  }

  .service:first-child {
    border-top: 1px solid var(--color-border);
  }

  .track-record__grid {
    flex-direction: column;
    gap: 48px;
    margin-bottom: 48px;
  }

  .track-record__number {
    font-size: 44px;
  }

  .footer__bottom {
    flex-direction: column;
    gap: 12px;
  }

  .back-to-top {
    bottom: 24px;
    right: 24px;
    width: 40px;
    height: 40px;
  }
}

/* ============================================================
   Responsive — 480px
   ============================================================ */
@media (max-width: 480px) {
  :root {
    --section-padding: 80px 0;
  }

  .container {
    padding: 0 20px;
  }

  .section-title {
    font-size: 21px;
    margin-bottom: 48px;
  }

  .hero__header {
    padding: 24px 20px;
  }

  .hero__title {
    font-size: 23px;
  }

  .hero__cta {
    padding: 12px 32px;
    font-size: 12px;
  }

  .target__item {
    padding: 20px 0;
    font-size: 14px;
  }

  .consultant__name {
    font-size: 18px;
  }

  .consultant__bio {
    font-size: 12px;
  }

  .service__title {
    font-size: 16px;
  }

  .service__desc {
    font-size: 12px;
  }

  .form__submit {
    width: 100%;
    padding: 14px 0;
  }

  .why-free__body p {
    font-size: 14px;
    text-align: left;
    line-height: 2;
  }
}