/* ============================================
   BELVIE — CONCIERGERIE LOCATIVE PARIS
   Style: Elegant / Premium / Parisian Luxury
   ============================================ */

/* --- DESIGN TOKENS --- */
:root {
  /* Typography */
  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body: 'Satoshi', 'Helvetica Neue', sans-serif;

  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transition */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
}

/* --- COLOR: BELVIE PALETTE --- */
/* Warm cream + deep navy/gold — Parisian luxury */
:root, [data-theme="light"] {
  --color-bg: #FAF9F6;
  --color-surface: #FFFFFF;
  --color-surface-2: #F5F3EF;
  --color-border: #E0DCD4;
  --color-divider: #EBE8E2;

  --color-text: #1A1A18;
  --color-text-muted: #6B6860;
  --color-text-faint: #A9A69E;
  --color-text-inverse: #FAF9F6;

  --color-primary: #1B2E4A;
  --color-primary-hover: #2A4570;
  --color-primary-light: #E8ECF2;

  --color-accent: #C5964A;
  --color-accent-hover: #B0843E;

  --shadow-sm: 0 1px 3px rgba(26, 26, 24, 0.06);
  --shadow-md: 0 4px 16px rgba(26, 26, 24, 0.08);
  --shadow-lg: 0 12px 40px rgba(26, 26, 24, 0.12);
}

[data-theme="dark"] {
  --color-bg: #141312;
  --color-surface: #1C1B19;
  --color-surface-2: #232220;
  --color-border: #3A3835;
  --color-divider: #2A2927;

  --color-text: #E5E3DF;
  --color-text-muted: #8A877F;
  --color-text-faint: #5A5852;
  --color-text-inverse: #1A1A18;

  --color-primary: #8DADD4;
  --color-primary-hover: #A5C0E0;
  --color-primary-light: #1F2938;

  --color-accent: #D4A85A;
  --color-accent-hover: #E0BA70;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.35);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.45);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg: #141312;
    --color-surface: #1C1B19;
    --color-surface-2: #232220;
    --color-border: #3A3835;
    --color-divider: #2A2927;
    --color-text: #E5E3DF;
    --color-text-muted: #8A877F;
    --color-text-faint: #5A5852;
    --color-text-inverse: #1A1A18;
    --color-primary: #8DADD4;
    --color-primary-hover: #A5C0E0;
    --color-primary-light: #1F2938;
    --color-accent: #D4A85A;
    --color-accent-hover: #E0BA70;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.35);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.45);
  }
}

/* --- HEADER --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: oklch(from var(--color-bg) l c h / 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.header__inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header__logo {
  color: var(--color-text);
  text-decoration: none;
}

.header__logo svg {
  height: 32px;
  width: auto;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.header__link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: -0.01em;
}

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

.header__cta-link {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-inverse);
  background: var(--color-primary);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full);
  text-decoration: none;
}

.header__cta-link:hover {
  background: var(--color-primary-hover);
}

.header__mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
}

.header__mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all 0.3s ease;
}

@media (max-width: 768px) {
  .header__nav { display: none; }
  .header__mobile-toggle { display: flex; }
}

/* --- MOBILE NAV --- */
.mobile-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 99;
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.mobile-nav.is-open {
  opacity: 1;
  pointer-events: all;
}

.mobile-nav__link {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  text-decoration: none;
}

.mobile-nav__cta {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text-inverse);
  background: var(--color-primary);
  padding: var(--space-3) var(--space-8);
  border-radius: var(--radius-full);
  text-decoration: none;
  margin-top: var(--space-4);
}

/* --- HERO --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
}

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

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(26, 26, 24, 0.35) 0%,
    rgba(26, 26, 24, 0.65) 60%,
    rgba(26, 26, 24, 0.85) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: var(--content-default);
  padding: var(--space-32) var(--space-6) var(--space-16);
  text-align: center;
}

.hero__eyebrow {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--space-6);
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 400;
  color: #FFFFFF;
  line-height: 1.1;
  margin-bottom: var(--space-6);
}

.hero__subtitle {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.8);
  max-width: 600px;
  margin: 0 auto var(--space-10);
  line-height: 1.6;
}

.hero__actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* --- BUTTONS --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-3) var(--space-8);
  border-radius: var(--radius-full);
  text-decoration: none;
  cursor: pointer;
  border: none;
  letter-spacing: -0.01em;
  min-height: 48px;
}

.btn--primary {
  background: var(--color-accent);
  color: #FFFFFF;
}

.btn--primary:hover {
  background: var(--color-accent-hover);
}

.btn--ghost {
  background: transparent;
  color: #FFFFFF;
  border: 1px solid rgba(255, 255, 255, 0.35);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.6);
}

.btn--full {
  width: 100%;
}

/* --- TRUST BAR --- */
.trust-bar {
  background: var(--color-primary);
  padding: var(--space-8) var(--space-6);
}

.trust-bar__inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-12);
}

.trust-bar__item {
  text-align: center;
}

.trust-bar__number {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: #FFFFFF;
  display: inline;
}

.trust-bar__suffix {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: rgba(255, 255, 255, 0.7);
}

.trust-bar__label {
  display: block;
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.65);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: var(--space-1);
}

.trust-bar__divider {
  width: 1px;
  height: 48px;
  background: rgba(255, 255, 255, 0.2);
}

@media (max-width: 640px) {
  .trust-bar__inner {
    flex-direction: column;
    gap: var(--space-6);
  }
  .trust-bar__divider {
    width: 48px;
    height: 1px;
  }
}

/* --- SECTION COMMON --- */
.section-eyebrow {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--space-4);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  color: var(--color-text);
  line-height: 1.1;
}

/* --- ADVANTAGES --- */
.advantages {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) var(--space-6);
  background: var(--color-bg);
}

.advantages__inner {
  max-width: var(--content-wide);
  margin: 0 auto;
}

.advantages__header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.advantages__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

@media (max-width: 768px) {
  .advantages__grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}

.advantage-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.advantage-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.advantage-card__icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-light);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-6);
  color: var(--color-primary);
}

.advantage-card__title {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.advantage-card__text {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* --- HOW IT WORKS --- */
.how-it-works {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) var(--space-6);
  background: var(--color-surface-2);
}

.how-it-works__inner {
  max-width: var(--content-default);
  margin: 0 auto;
}

.how-it-works__header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.how-it-works__steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-10);
}

.step {
  display: flex;
  gap: var(--space-8);
  align-items: flex-start;
}

.step__number {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-accent);
  flex-shrink: 0;
  width: 72px;
  line-height: 1;
}

.step__title {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.step__text {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.6;
}

@media (max-width: 480px) {
  .step {
    flex-direction: column;
    gap: var(--space-3);
  }
  .step__number {
    width: auto;
  }
}

/* --- IMAGE BREAK --- */
.image-break {
  position: relative;
  height: 50vh;
  min-height: 360px;
  overflow: hidden;
}

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

.image-break__overlay {
  position: absolute;
  inset: 0;
  background: rgba(26, 26, 24, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
}

.image-break__quote {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-xl);
  color: #FFFFFF;
  text-align: center;
  max-width: 700px;
  line-height: 1.4;
}

/* --- NUMBERS --- */
.numbers {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) var(--space-6);
  background: var(--color-bg);
}

.numbers__inner {
  max-width: var(--content-wide);
  margin: 0 auto;
}

.numbers__header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.numbers__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

@media (max-width: 768px) {
  .numbers__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .numbers__grid {
    grid-template-columns: 1fr;
  }
}

.number-card {
  text-align: center;
  padding: var(--space-8) var(--space-4);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
}

.number-card__value {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.number-card__label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.number-card__detail {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* --- TENANTS --- */
.tenants {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) var(--space-6);
  background: var(--color-surface-2);
}

.tenants__inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

@media (max-width: 768px) {
  .tenants__inner {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

.tenants__desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-top: var(--space-6);
  margin-bottom: var(--space-8);
}

.tenants__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.tenants__list li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-base);
  color: var(--color-text);
  font-weight: 500;
}

.tenants__list svg {
  flex-shrink: 0;
  color: var(--color-accent);
}

.tenants__image {
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.tenants__image img {
  width: 100%;
  height: 400px;
  object-fit: cover;
}

@media (max-width: 768px) {
  .tenants__image img {
    height: 280px;
  }
}

/* --- FAQ --- */
.faq {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) var(--space-6);
  background: var(--color-bg);
}

.faq__inner {
  max-width: var(--content-default);
  margin: 0 auto;
}

.faq__header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.faq__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.faq__item {
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
}

.faq__question {
  padding: var(--space-5) var(--space-6);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.faq__question::after {
  content: '+';
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  flex-shrink: 0;
  margin-left: var(--space-4);
  transition: transform 0.3s ease;
}

.faq__item[open] .faq__question::after {
  content: '−';
}

.faq__question::-webkit-details-marker {
  display: none;
}

.faq__answer {
  padding: 0 var(--space-6) var(--space-5);
}

.faq__answer p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* --- CONTACT --- */
.contact {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) var(--space-6);
  background: var(--color-primary);
  color: #FFFFFF;
}

.contact__inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

@media (max-width: 768px) {
  .contact__inner {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }
}

.contact .section-eyebrow {
  color: var(--color-accent);
}

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

.contact__desc {
  font-size: var(--text-base);
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.6;
  margin-top: var(--space-6);
  margin-bottom: var(--space-8);
}

.contact__direct {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.contact__phone,
.contact__email {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-base);
  font-weight: 500;
  color: #FFFFFF;
  text-decoration: none;
}

.contact__phone:hover,
.contact__email:hover {
  color: var(--color-accent);
}

/* Form */
.contact__form {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-group label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  color: var(--color-text);
  background: var(--color-bg);
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(27, 46, 74, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-faint);
}

.contact__form .btn--primary {
  margin-top: var(--space-2);
}

.form-note {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-align: center;
}

/* Form success state */
.form-success {
  text-align: center;
  padding: var(--space-8) var(--space-4);
}

.form-success__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-4);
  color: var(--color-accent);
}

.form-success__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.form-success__text {
  font-size: var(--text-base);
  color: var(--color-text-muted);
}

/* --- FOOTER --- */
.footer {
  background: var(--color-surface-2);
  padding: var(--space-12) var(--space-6);
  border-top: 1px solid var(--color-divider);
}

.footer__inner {
  max-width: var(--content-wide);
  margin: 0 auto;
}

.footer__brand {
  margin-bottom: var(--space-6);
}

.footer__brand svg {
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.footer__tagline {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.footer__links {
  display: flex;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

.footer__links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
}

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

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
}

.footer__bottom p,
.footer__bottom a {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-decoration: none;
}

.footer__bottom a:hover {
  color: var(--color-text-muted);
}

@media (max-width: 640px) {
  .footer__bottom {
    flex-direction: column;
    gap: var(--space-2);
    text-align: center;
  }
  .footer__links {
    flex-direction: column;
    gap: var(--space-3);
  }
}

/* --- SCROLL ANIMATIONS --- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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