/* ═══════════════════════════════════════════════
                       FUNCTIONAL: Mobile Navigation Overlay
                       ═══════════════════════════════════════════════ */
                    .mobile-nav {
                      position: fixed;
                      inset: 0;
                      z-index: 500;
                      background: rgba(10,10,10,0.97);
                      backdrop-filter: blur(24px);
                      -webkit-backdrop-filter: blur(24px);
                      display: flex;
                      flex-direction: column;
                      align-items: center;
                      justify-content: center;
                      gap: 2rem;
                      opacity: 0;
                      pointer-events: none;
                      transition: opacity 0.5s var(--ease-out-expo);
                    }
                    .mobile-nav.active {
                      opacity: 1;
                      pointer-events: all;
                    }
                    .mobile-nav__close {
                      position: absolute;
                      top: 1.5rem;
                      right: 1.5rem;
                      width: 44px;
                      height: 44px;
                      display: flex;
                      align-items: center;
                      justify-content: center;
                      color: #8E8E93;
                      font-size: 1.5rem;
                      cursor: pointer;
                      transition: color 0.3s ease, transform 0.3s ease;
                    }
                    .mobile-nav__close:hover { color: #F2F2F7; transform: rotate(90deg); }
                    .mobile-nav__link {
                      font-family: var(--font-display);
                      font-size: clamp(1.5rem, 5vw, 2.2rem);
                      font-weight: 700;
                      color: rgba(242,242,247,0.6);
                      transition: color 0.3s ease, transform 0.3s var(--ease-out-expo);
                      opacity: 0;
                      transform: translateY(20px);
                    }
                    .mobile-nav.active .mobile-nav__link {
                      opacity: 1;
                      transform: translateY(0);
                    }
                    .mobile-nav.active .mobile-nav__link:nth-child(1) { transition-delay: 0.1s; }
                    .mobile-nav.active .mobile-nav__link:nth-child(2) { transition-delay: 0.15s; }
                    .mobile-nav.active .mobile-nav__link:nth-child(3) { transition-delay: 0.2s; }
                    .mobile-nav.active .mobile-nav__link:nth-child(4) { transition-delay: 0.25s; }
                    .mobile-nav.active .mobile-nav__link:nth-child(5) { transition-delay: 0.3s; }
                    .mobile-nav__link:hover { color: var(--accent); transform: translateX(8px); }
                    .mobile-nav__cta {
                      margin-top: 1rem;
                      font-family: var(--font-body);
                      font-size: 0.7rem;
                      font-weight: 500;
                      letter-spacing: 0.25em;
                      text-transform: uppercase;
                      color: #FFFFFF;
                      background: var(--accent);
                      padding: 1rem 2.5rem;
                      clip-path: none;
                      border-radius: var(--radius-pill);
                      transition: background 0.4s var(--ease-out-expo), transform 0.4s var(--ease-out-expo);
                      opacity: 0;
                      transform: translateY(20px);
                    }
                    .mobile-nav.active .mobile-nav__cta {
                      opacity: 1;
                      transform: translateY(0);
                      transition-delay: 0.35s;
                    }
                    .mobile-nav__cta:hover { background: var(--accent-light); transform: translateY(-2px); }
                    @media (min-width: 769px) {
                      .mobile-nav { display: none !important; }
                    }

                    /* ═══════════════════════════════════════════════
                       FUNCTIONAL: Booking Modal
                       ═══════════════════════════════════════════════ */
                    .booking-backdrop {
                      position: fixed;
                      inset: 0;
                      z-index: 600;
                      background: rgba(10,10,10,0.7);
                      backdrop-filter: blur(12px);
                      -webkit-backdrop-filter: blur(12px);
                      opacity: 0;
                      pointer-events: none;
                      transition: opacity 0.5s var(--ease-out-expo);
                    }
                    .booking-backdrop.active {
                      opacity: 1;
                      pointer-events: all;
                    }
                    .booking-modal {
                      position: fixed;
                      inset: 0;
                      z-index: 601;
                      display: flex;
                      align-items: center;
                      justify-content: center;
                      opacity: 0;
                      pointer-events: none;
                      padding: 1rem;
                    }
                    .booking-modal.active {
                      opacity: 1;
                      pointer-events: all;
                    }
                    .booking-modal__container {
                      position: relative;
                      background: var(--bg-card);
                      width: 100%;
                      max-width: 720px;
                      max-height: 92vh;
                      border-radius: 2px;
                      overflow: hidden;
                      transform: scale(0.92);
                      opacity: 0;
                      transition: transform 0.5s var(--ease-out-expo), opacity 0.4s ease;
                      box-shadow: 0 40px 100px rgba(10,10,10,0.25), 0 10px 40px rgba(10,10,10,0.12);
                    }
                    .booking-modal.active .booking-modal__container {
                      transform: scale(1);
                      opacity: 1;
                    }
                    .booking-modal__header {
                      padding: 1.5rem 2rem 1rem;
                      display: flex;
                      align-items: center;
                      justify-content: space-between;
                      border-bottom: 1px solid var(--border-light);
                    }
                    .booking-modal__step-title {
                      font-family: var(--font-display);
                      font-size: 1.2rem;
                      font-weight: 700;
                      color: var(--fg-primary);
                    }
                    .booking-modal__close {
                      width: 40px;
                      height: 40px;
                      display: flex;
                      align-items: center;
                      justify-content: center;
                      font-size: 1.3rem;
                      color: var(--fg-muted);
                      cursor: pointer;
                      transition: color 0.3s ease, transform 0.3s ease;
                      border-radius: 2px;
                    }
                    .booking-modal__close:hover { color: var(--fg-primary); transform: rotate(90deg); }

                    /* Progress bar */
                    .booking-modal__progress {
                      display: flex;
                      align-items: center;
                      justify-content: center;
                      padding: 1rem 2rem;
                      gap: 0;
                    }
                    .booking-modal__dot {
                      width: 10px;
                      height: 10px;
                      border-radius: 50%;
                      background: var(--border);
                      transition: background 0.4s ease, transform 0.4s ease, box-shadow 0.4s ease;
                      flex-shrink: 0;
                    }
                    .booking-modal__dot.active {
                      background: var(--accent);
                      transform: scale(1.2);
                      box-shadow: 0 0 12px rgba(142,153,164,0.3);
                    }
                    .booking-modal__dot.completed {
                      background: var(--accent-dim);
                    }
                    .booking-modal__line {
                      width: 40px;
                      height: 2px;
                      background: var(--border);
                      transition: background 0.4s ease;
                    }
                    .booking-modal__line.completed {
                      background: var(--accent-dim);
                    }

                    /* Modal body */
                    .booking-modal__body {
                      padding: 1.5rem 2rem;
                      overflow-y: auto;
                      max-height: calc(92vh - 180px);
                      min-height: 300px;
                    }
                    .booking-modal__step {
                      display: none;
                      animation: bookingStepIn 0.4s var(--ease-out-expo);
                    }
                    .booking-modal__step.active { display: block; }
                    @keyframes bookingStepIn {
                      from { opacity: 0; transform: translateX(30px); }
                      to { opacity: 1; transform: translateX(0); }
                    }

                    /* Footer nav */
                    .booking-modal__footer {
                      padding: 1rem 2rem 1.5rem;
                      display: flex;
                      justify-content: space-between;
                      gap: 1rem;
                      border-top: 1px solid var(--border-light);
                    }
                    .booking-btn {
                      font-family: var(--font-body);
                      font-size: 0.7rem;
                      font-weight: 500;
                      letter-spacing: 0.2em;
                      text-transform: uppercase;
                      padding: 0.9rem 2rem;
                      transition: all 0.4s var(--ease-out-expo);
                      clip-path: none;
                      border-radius: var(--radius-pill);
                      cursor: pointer;
                    }
                    .booking-btn--back {
                      background: transparent;
                      color: var(--fg-muted);
                      border: 1px solid var(--border);
                      clip-path: none;
                    }
                    .booking-btn--back:hover { color: var(--fg-primary); border-color: var(--fg-muted); }
                    .booking-btn--next {
                      background: var(--accent);
                      color: #FFFFFF;
                    }
                    .booking-btn--next:hover { background: var(--accent-light); transform: translateY(-1px); }
                    .booking-btn--next:disabled {
                      background: var(--border);
                      color: var(--fg-dim);
                      cursor: not-allowed;
                      transform: none;
                    }
                    .booking-btn--confirm {
                      background: var(--accent);
                      color: #FFFFFF;
                    }
                    .booking-btn--confirm:hover { background: var(--accent-light); transform: translateY(-1px); }

                    /* Step 1: Service cards */
                    .booking-services {
                      display: grid;
                      grid-template-columns: repeat(2, 1fr);
                      gap: 0.75rem;
                    }
                    .booking-service-card {
                      padding: 1.2rem;
                      background: var(--bg-primary);
                      border: 2px solid transparent;
                      cursor: pointer;
                      transition: border-color 0.3s ease, background 0.3s ease, transform 0.3s var(--ease-out-expo);
                      border-radius: 2px;
                    }
                    .booking-service-card:hover {
                      background: var(--bg-secondary);
                      transform: translateY(-2px);
                    }
                    .booking-service-card.selected {
                      border-color: var(--accent);
                      background: rgba(142,153,164,0.06);
                    }
                    .booking-service-card__name {
                      font-family: var(--font-display);
                      font-size: 0.95rem;
                      font-weight: 700;
                      color: var(--fg-primary);
                      margin-bottom: 0.3rem;
                    }
                    .booking-service-card__price {
                      font-family: var(--font-body);
                      font-size: 0.65rem;
                      font-weight: 500;
                      letter-spacing: 0.15em;
                      text-transform: uppercase;
                      color: var(--accent);
                    }

                    /* Step 2: Stylist cards */
                    .booking-stylists {
                      display: flex;
                      flex-direction: column;
                      gap: 0.75rem;
                    }
                    .booking-stylist-card {
                      display: flex;
                      align-items: center;
                      gap: 1rem;
                      padding: 1rem 1.2rem;
                      background: var(--bg-primary);
                      border: 2px solid transparent;
                      cursor: pointer;
                      transition: border-color 0.3s ease, background 0.3s ease;
                      border-radius: 2px;
                    }
                    .booking-stylist-card:hover { background: var(--bg-secondary); }
                    .booking-stylist-card.selected {
                      border-color: var(--accent);
                      background: rgba(142,153,164,0.06);
                    }
                    .booking-stylist-card__avatar {
                      width: 48px;
                      height: 48px;
                      border-radius: 50%;
                      background: var(--bg-tertiary);
                      display: flex;
                      align-items: center;
                      justify-content: center;
                      font-family: var(--font-display);
                      font-size: 0.8rem;
                      font-weight: 700;
                      color: var(--accent);
                      flex-shrink: 0;
                    }
                    .booking-stylist-card__info { flex: 1; }
                    .booking-stylist-card__name {
                      font-family: var(--font-display);
                      font-size: 0.95rem;
                      font-weight: 700;
                      color: var(--fg-primary);
                    }
                    .booking-stylist-card__role {
                      font-family: var(--font-body);
                      font-size: 0.6rem;
                      font-weight: 500;
                      letter-spacing: 0.15em;
                      text-transform: uppercase;
                      color: var(--accent);
                    }
                    .booking-stylist-card__quote {
                      font-family: var(--font-accent);
                      font-size: 0.8rem;
                      font-style: italic;
                      color: var(--fg-muted);
                      margin-top: 0.3rem;
                    }

                    /* Step 3: Date/Time */
                    .booking-datetime {
                      display: grid;
                      grid-template-columns: 1fr 1fr;
                      gap: 1.5rem;
                    }
                    .booking-calendar__month-nav {
                      display: flex;
                      align-items: center;
                      justify-content: space-between;
                      margin-bottom: 1rem;
                    }
                    .booking-calendar__month {
                      font-family: var(--font-display);
                      font-size: 1rem;
                      font-weight: 700;
                      color: var(--fg-primary);
                    }
                    .booking-calendar__nav-btn {
                      width: 32px;
                      height: 32px;
                      display: flex;
                      align-items: center;
                      justify-content: center;
                      color: var(--fg-muted);
                      cursor: pointer;
                      transition: color 0.3s ease;
                    }
                    .booking-calendar__nav-btn:hover { color: var(--accent); }
                    .booking-calendar__weekdays {
                      display: grid;
                      grid-template-columns: repeat(7, 1fr);
                      gap: 0;
                      margin-bottom: 0.5rem;
                    }
                    .booking-calendar__weekday {
                      text-align: center;
                      font-family: var(--font-body);
                      font-size: 0.55rem;
                      font-weight: 500;
                      letter-spacing: 0.1em;
                      text-transform: uppercase;
                      color: var(--fg-dim);
                      padding: 0.3rem;
                    }
                    .booking-calendar__days {
                      display: grid;
                      grid-template-columns: repeat(7, 1fr);
                      gap: 2px;
                    }
                    .booking-calendar__day {
                      text-align: center;
                      padding: 0.5rem 0.25rem;
                      font-family: var(--font-body);
                      font-size: 0.8rem;
                      color: var(--fg-secondary);
                      cursor: pointer;
                      border-radius: 2px;
                      transition: background 0.3s ease, color 0.3s ease;
                    }
                    .booking-calendar__day:hover:not(.disabled):not(.empty) {
                      background: var(--bg-elevated);
                    }
                    .booking-calendar__day.selected {
                      background: var(--accent);
                      color: #FFFFFF;
                    }
                    .booking-calendar__day.disabled {
                      color: var(--fg-dim);
                      opacity: 0.35;
                      cursor: default;
                    }
                    .booking-calendar__day.empty { cursor: default; }
                    .booking-time-slots {
                      display: grid;
                      grid-template-columns: repeat(3, 1fr);
                      gap: 0.5rem;
                    }
                    .booking-time-slot {
                      padding: 0.6rem;
                      text-align: center;
                      font-family: var(--font-body);
                      font-size: 0.75rem;
                      color: var(--fg-secondary);
                      background: var(--bg-primary);
                      border: 1px solid var(--border-light);
                      cursor: pointer;
                      border-radius: 2px;
                      transition: all 0.3s ease;
                    }
                    .booking-time-slot:hover:not(.unavailable) {
                      background: var(--bg-secondary);
                      border-color: var(--accent-dim);
                    }
                    .booking-time-slot.selected {
                      background: var(--accent);
                      color: #FFFFFF;
                      border-color: var(--accent);
                    }
                    .booking-time-slot.unavailable {
                      color: var(--fg-dim);
                      opacity: 0.4;
                      cursor: default;
                      text-decoration: line-through;
                    }

                    /* Step 4: Form */
                    .booking-form { display: flex; flex-direction: column; gap: 1.25rem; }
                    .booking-form__group { display: flex; flex-direction: column; gap: 0.35rem; }
                    .booking-form__label {
                      font-family: var(--font-body);
                      font-size: 0.6rem;
                      font-weight: 500;
                      letter-spacing: 0.2em;
                      text-transform: uppercase;
                      color: var(--fg-muted);
                    }
                    .booking-form__input,
                    .booking-form__textarea {
                      font-family: var(--font-body);
                      font-size: 0.9rem;
                      padding: 0.85rem 1rem;
                      background: var(--bg-primary);
                      border: 1px solid var(--border);
                      color: var(--fg-primary);
                      border-radius: 2px;
                      transition: border-color 0.3s ease, box-shadow 0.3s ease;
                      outline: none;
                    }
                    .booking-form__input:focus,
                    .booking-form__textarea:focus {
                      border-color: var(--accent);
                      box-shadow: 0 0 0 3px rgba(142,153,164,0.12);
                    }
                    .booking-form__input.error,
                    .booking-form__textarea.error {
                      border-color: #C0392B;
                    }
                    .booking-form__error {
                      font-family: var(--font-body);
                      font-size: 0.7rem;
                      color: #C0392B;
                      min-height: 1rem;
                    }
                    .booking-form__textarea { resize: vertical; min-height: 80px; }

                    /* Step 5: Review */
                    .booking-review { display: flex; flex-direction: column; gap: 1rem; }
                    .booking-review__row {
                      display: flex;
                      justify-content: space-between;
                      align-items: center;
                      padding: 0.8rem 0;
                      border-bottom: 1px solid var(--border-light);
                    }
                    .booking-review__label {
                      font-family: var(--font-body);
                      font-size: 0.6rem;
                      font-weight: 500;
                      letter-spacing: 0.2em;
                      text-transform: uppercase;
                      color: var(--fg-muted);
                    }
                    .booking-review__value {
                      font-family: var(--font-accent);
                      font-size: 0.95rem;
                      color: var(--fg-primary);
                      text-align: right;
                    }
                    .booking-review__total {
                      display: flex;
                      justify-content: space-between;
                      align-items: center;
                      padding: 1rem 0;
                      margin-top: 0.5rem;
                      border-top: 2px solid var(--accent);
                    }
                    .booking-review__total-label {
                      font-family: var(--font-body);
                      font-size: 0.7rem;
                      font-weight: 500;
                      letter-spacing: 0.2em;
                      text-transform: uppercase;
                      color: var(--fg-muted);
                    }
                    .booking-review__total-price {
                      font-family: var(--font-display);
                      font-size: 1.5rem;
                      font-weight: 700;
                      color: var(--accent);
                    }

                    /* Success state */
                    .booking-success {
                      text-align: center;
                      padding: 2rem 1rem;
                    }
                    .booking-success__checkmark {
                      width: 80px;
                      height: 80px;
                      margin: 0 auto 1.5rem;
                      position: relative;
                    }
                    .booking-success__checkmark-circle {
                      width: 80px;
                      height: 80px;
                      border-radius: 50%;
                      border: 3px solid var(--accent);
                      display: flex;
                      align-items: center;
                      justify-content: center;
                      animation: successScale 0.6s var(--ease-out-expo);
                    }
                    @keyframes successScale {
                      0% { transform: scale(0); opacity: 0; }
                      60% { transform: scale(1.15); }
                      100% { transform: scale(1); opacity: 1; }
                    }
                    .booking-success__checkmark-svg {
                      width: 36px;
                      height: 36px;
                      stroke: var(--accent);
                      fill: none;
                      stroke-width: 3;
                      stroke-linecap: round;
                      stroke-linejoin: round;
                      stroke-dasharray: 50;
                      stroke-dashoffset: 50;
                      animation: successCheck 0.6s 0.3s var(--ease-out-expo) forwards;
                    }
                    @keyframes successCheck {
                      to { stroke-dashoffset: 0; }
                    }
                    .booking-success__title {
                      font-family: var(--font-display);
                      font-size: 1.5rem;
                      font-weight: 700;
                      color: var(--fg-primary);
                      margin-bottom: 0.5rem;
                    }
                    .booking-success__ref {
                      font-family: var(--font-body);
                      font-size: 0.8rem;
                      letter-spacing: 0.15em;
                      color: var(--accent);
                      margin-bottom: 1rem;
                    }
                    .booking-success__details {
                      font-family: var(--font-accent);
                      font-size: 0.95rem;
                      color: var(--fg-secondary);
                      margin-bottom: 0.3rem;
                    }
                    .booking-success__email-note {
                      font-family: var(--font-body);
                      font-size: 0.75rem;
                      color: var(--fg-muted);
                      margin-top: 1rem;
                    }

                    /* ═══════════════════════════════════════════════
                       FUNCTIONAL: Toast Notifications
                       ═══════════════════════════════════════════════ */
                    .toast-container {
                      position: fixed;
                      bottom: 1.5rem;
                      right: 1.5rem;
                      z-index: 900;
                      display: flex;
                      flex-direction: column-reverse;
                      gap: 0.75rem;
                      pointer-events: none;
                    }
                    .toast {
                      background: var(--bg-card);
                      border-radius: 2px;
                      padding: 1rem 1.5rem;
                      box-shadow: 0 10px 40px rgba(10,10,10,0.15);
                      pointer-events: all;
                      overflow: hidden;
                      position: relative;
                      min-width: 280px;
                      max-width: 400px;
                      animation: toastIn 0.4s var(--ease-out-expo);
                      border-left: 3px solid var(--accent);
                    }
                    .toast--success { border-left-color: #27AE60; }
                    .toast--error { border-left-color: #C0392B; }
                    .toast--info { border-left-color: var(--accent); }
                    .toast.removing {
                      animation: toastOut 0.3s var(--ease-out-expo) forwards;
                    }
                    @keyframes toastIn {
                      from { opacity: 0; transform: translateX(40px); }
                      to { opacity: 1; transform: translateX(0); }
                    }
                    @keyframes toastOut {
                      to { opacity: 0; transform: translateX(40px); }
                    }
                    .toast__title {
                      font-family: var(--font-body);
                      font-size: 0.8rem;
                      font-weight: 500;
                      color: var(--fg-primary);
                      margin-bottom: 0.2rem;
                    }
                    .toast__message {
                      font-family: var(--font-body);
                      font-size: 0.75rem;
                      color: var(--fg-muted);
                    }
                    .toast__progress {
                      position: absolute;
                      bottom: 0;
                      left: 0;
                      height: 2px;
                      background: var(--accent);
                      animation: toastProgress 4s linear forwards;
                    }
                    .toast--success .toast__progress { background: #27AE60; }
                    .toast--error .toast__progress { background: #C0392B; }
                    @keyframes toastProgress {
                      from { width: 100%; }
                      to { width: 0%; }
                    }

                    /* ═══════════════════════════════════════════════
                       FUNCTIONAL: Active Nav Highlighting
                       ═══════════════════════════════════════════════ */
                    .nav__link.nav__link--active {
                      color: var(--accent) !important;
                    }
                    .nav__link.nav__link--active::after {
                      width: 100% !important;
                    }
                    .nav.scrolled .nav__link.nav__link--active {
                      color: var(--accent) !important;
                    }

                    /* ═══════════════════════════════════════════════
                       FUNCTIONAL: Scroll padding for fixed nav
                       ═══════════════════════════════════════════════ */
                    html {
                      scroll-padding-top: 80px;
                    }

                    /* ═══════════════════════════════════════════════
                       FUNCTIONAL: Responsive booking modal
                       ═══════════════════════════════════════════════ */
                    @media (max-width: 768px) {
                      .booking-modal__container {
                        max-height: 100vh;
                        height: 100vh;
                        max-width: 100%;
                        border-radius: 0;
                      }
                      .booking-modal__body {
                        max-height: calc(100vh - 200px);
                      }
                      .booking-services {
                        grid-template-columns: 1fr 1fr;
                        gap: 0.5rem;
                      }
                      .booking-datetime {
                        grid-template-columns: 1fr;
                      }
                      .booking-time-slots {
                        grid-template-columns: repeat(3, 1fr);
                      }
                      .booking-modal__footer {
                        position: absolute;
                        bottom: 0;
                        left: 0;
                        right: 0;
                        background: var(--bg-card);
                        padding: 1rem 1.5rem;
                      }
                      .toast-container {
                        right: 0.75rem;
                        bottom: 0.75rem;
                        left: 0.75rem;
                      }
                      .toast {
                        min-width: unset;
                        max-width: unset;
                      }
                    }
                    @media (max-width: 480px) {
                      .booking-services {
                        grid-template-columns: 1fr;
                      }
                    }

                    /* Focus visible for accessibility */
                    .booking-service-card:focus-visible,
                    .booking-stylist-card:focus-visible,
                    .booking-calendar__day:focus-visible,
                    .booking-time-slot:focus-visible,
                    .booking-btn:focus-visible,
                    .booking-form__input:focus-visible,
                    .booking-form__textarea:focus-visible {
                      outline: 2px solid var(--accent);
                      outline-offset: 2px;
                    }