/* ================= Core Variables & Reset ================= */
        :root {
            --color-bg-light: #FEFEEA;
            --color-text-dark: #333F48;
            --color-accent: #A18269;
            --color-warm-grey: #CBCBC4;
            --color-border: rgba(51, 63, 72, 0.12);
            --color-border-focus: rgba(161, 130, 105, 0.6);
            --font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
            --color-slate-blue: #333F48;
            --color-cream: #EBEBE1;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--color-bg-light);
            color: var(--color-text-dark);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* ================= Header (Light Theme) ================= */
        .main-header {
            position: fixed;
            top: 0; left: 0; width: 100%;
            height: 90px;
            display: flex;
            align-items: center;
            z-index: 100;
            background: rgba(254, 254, 234, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(51, 63, 72, 0.04);
        }

        .header-container {
            width: 100%;
            max-width: 1800px;
            margin: 0 auto;
            padding: 0 5vw;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo img {
            height: 28px;
            width: auto;
            filter: brightness(0.2) sepia(1) hue-rotate(180deg) saturate(0.5);
        }

        .nav-menu {
            display: flex;
            gap: 40px;
        }

        .nav-link {
            text-decoration: none;
            color: var(--color-text-dark);
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            position: relative;
            padding: 6px 0;
            opacity: 0.5;
            transition: opacity 0.4s ease;
        }

        .nav-link:hover { opacity: 1; }

        .header-right {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .lang-switch {
            display: flex;
            gap: 8px;
            font-size: 12px;
            font-weight: 500;
        }

        .lang-btn {
            background: none;
            border: none;
            color: var(--color-text-dark);
            font-family: var(--font-family);
            cursor: pointer;
            opacity: 0.4;
            transition: opacity 0.3s ease;
            font-size: 12px;
        }

        .lang-btn.active, .lang-btn:hover { opacity: 1; }
        .lang-sep { color: var(--color-text-dark); opacity: 0.15; }

        .nav-cta {
            padding: 12px 28px;
            border-radius: 100px;
            border: 1px solid rgba(161, 130, 105, 0.4);
            color: var(--color-accent);
            font-size: 11px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.15em;
            text-decoration: none;
            transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
        }

        .nav-cta:hover {
            background: var(--color-accent);
            color: var(--color-bg-light);
            border-color: var(--color-accent);
        }

        /* ================= Page Layout ================= */
        .briefing-page {
            padding-top: 180px;
            padding-bottom: 140px;
            max-width: 920px;
            margin: 0 auto;
            padding-left: 5vw;
            padding-right: 5vw;
        }

        /* ================= Intro Section ================= */
        .intro-section {
            margin-bottom: 64px;
            position: relative;
        }

        .intro-eyebrow {
            display: block;
            font-size: 11px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.25em;
            color: var(--color-accent);
            margin-bottom: 32px;
            opacity: 0.8;
        }

        .intro-headline {
            font-size: clamp(38px, 4.5vw, 60px);
            font-weight: 300;
            letter-spacing: -0.03em;
            color: var(--color-text-dark);
            margin-bottom: 32px;
            line-height: 1.08;
        }

        .intro-text {
            font-size: clamp(17px, 1.4vw, 20px);
            font-weight: 400;
            color: rgba(51, 63, 72, 0.55);
            max-width: 600px;
            line-height: 1.6;
        }

        /* ================= Progress Indicator ================= */
        .progress-bar {
            margin-bottom: 64px;
            position: relative;
        }

        .progress-steps {
            display: flex;
            align-items: center;
            justify-content: space-between;
            position: relative;
        }

        .progress-track {
            position: absolute;
            top: 50%;
            left: 0;
            right: 0;
            height: 1px;
            background: var(--color-border);
            transform: translateY(-50%);
            z-index: 0;
        }

        .progress-fill {
            position: absolute;
            top: 50%;
            left: 0;
            height: 1px;
            background: var(--color-accent);
            transform: translateY(-50%);
            z-index: 1;
            transition: width 0.7s cubic-bezier(0.16, 1, 0.3, 1);
            width: 0%;
        }

        .progress-step {
            position: relative;
            z-index: 2;
            display: flex;
            flex-direction: column;
            align-items: center;
            cursor: default;
        }

        .step-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--color-bg-light);
            border: 1.5px solid var(--color-border);
            transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
            position: relative;
        }

        .step-dot::after {
            content: '';
            position: absolute;
            inset: -6px;
            border-radius: 50%;
            background: rgba(161, 130, 105, 0);
            transition: background 0.5s ease;
        }

        .progress-step.active .step-dot {
            background: var(--color-accent);
            border-color: var(--color-accent);
            transform: scale(1.3);
        }

        .progress-step.active .step-dot::after {
            background: rgba(161, 130, 105, 0.12);
        }

        .progress-step.completed .step-dot {
            background: var(--color-accent);
            border-color: var(--color-accent);
        }

        .step-label {
            position: absolute;
            top: 24px;
            font-size: 10px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.14em;
            color: rgba(51, 63, 72, 0.25);
            white-space: nowrap;
            transition: color 0.5s ease, opacity 0.5s ease;
        }

        .progress-step.active .step-label {
            color: var(--color-accent);
        }

        .progress-step.completed .step-label {
            color: rgba(51, 63, 72, 0.45);
        }

        /* ================= Multi-Step Form ================= */
        .briefing-form {
            position: relative;
            min-height: 400px;
        }

        /* ================= Form Step ================= */
        .form-step {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            opacity: 0;
            visibility: hidden;
            transform: translateY(24px);
            transition: opacity 0.55s cubic-bezier(0.16, 1, 0.3, 1),
                        transform 0.55s cubic-bezier(0.16, 1, 0.3, 1),
                        visibility 0s linear 0.55s;
            pointer-events: none;
        }

        .form-step.active {
            position: relative;
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
            transition: opacity 0.55s cubic-bezier(0.16, 1, 0.3, 1),
                        transform 0.55s cubic-bezier(0.16, 1, 0.3, 1),
                        visibility 0s linear 0s;
            pointer-events: auto;
        }

        .form-step.exit-left {
            transform: translateX(-40px);
            opacity: 0;
        }

        .form-step.enter-right {
            transform: translateX(40px);
        }

        /* ================= Form Section Block ================= */
        .form-section {
            position: relative;
            padding: 0;
            border: none;
            display: flex;
            flex-direction: column;
            gap: 48px;
        }

        .form-section.dropdown-active {
            z-index: 10;
        }

        /* Section Header with extending line */
        .section-header {
            display: flex;
            align-items: center;
            gap: 24px;
            position: relative;
            margin-bottom: 12px;
        }

        .section-number {
            font-size: 11px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.25em;
            color: var(--color-accent);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .section-line {
            flex: 1;
            height: 1px;
            background: linear-gradient(90deg, rgba(161, 130, 105, 0.3), rgba(161, 130, 105, 0));
        }

        /* Background ghost numbers */
        .section-ghost {
            position: absolute;
            top: -20px;
            right: -20px;
            font-size: clamp(140px, 18vw, 220px);
            font-weight: 200;
            color: var(--color-text-dark);
            opacity: 0.025;
            line-height: 1;
            pointer-events: none;
            user-select: none;
            letter-spacing: -0.04em;
        }

        /* ================= Input Groups ================= */
        .fields-container {
            display: flex;
            flex-direction: column;
            gap: 44px;
            position: relative;
            z-index: 1;
        }

        .input-group {
            display: flex;
            flex-direction: column;
            position: relative;
        }

        .input-label {
            font-size: 12px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.14em;
            color: var(--color-text-dark);
            margin-bottom: 16px;
            opacity: 0.45;
            transition: opacity 0.4s ease, color 0.4s ease;
        }

        .input-group:focus-within .input-label {
            opacity: 0.9;
            color: var(--color-accent);
        }

        .input-group.has-error .input-label {
            color: #b85a4f;
            opacity: 0.92;
        }

        input[type="text"],
        input[type="email"],
        textarea,
        select {
            width: 100%;
            background: transparent;
            border: none;
            border-bottom: 1px solid var(--color-border);
            padding: 14px 0 16px 0;
            font-size: 17px;
            font-family: var(--font-family);
            color: var(--color-text-dark);
            outline: none;
            border-radius: 0;
            transition: border-color 0.5s ease;
            -webkit-appearance: none;
            appearance: none;
        }

        textarea {
            resize: none;
            min-height: 48px;
            line-height: 1.6;
            overflow-y: hidden;
        }

        input::placeholder,
        textarea::placeholder {
            color: rgba(51, 63, 72, 0.2);
            font-weight: 400;
            font-size: 17px;
        }

        /* Focus accent underline */
        input:focus,
        textarea:focus {
            border-bottom-color: var(--color-accent);
        }

        /* Animated underline on focus */
        .input-underline {
            display: block;
            width: 100%;
            height: 2px;
            background: var(--color-accent);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
            margin-top: -1px;
        }

        .input-group:focus-within .input-underline {
            transform: scaleX(1);
        }

        .input-group.has-error input,
        .input-group.has-error textarea,
        .input-group.has-error select {
            border-bottom-color: #b85a4f;
        }

        .input-group.has-error .input-underline {
            transform: scaleX(1);
            background: #b85a4f;
        }

        .custom-select.has-error .custom-select-trigger {
            border-bottom-color: #b85a4f;
        }

        .field-error-message {
            margin-top: 8px;
            font-size: 12px;
            line-height: 1.35;
            color: #b85a4f;
            letter-spacing: 0.01em;
        }

        /* ================= Custom Dropdown ================= */
        .custom-select {
            position: relative;
            width: 100%;
        }

        .custom-select-trigger {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 14px 0 16px 0;
            border-bottom: 1px solid var(--color-border);
            cursor: pointer;
            transition: border-color 0.4s ease;
            user-select: none;
        }

        .custom-select.open .custom-select-trigger {
            border-bottom-color: var(--color-accent);
        }

        .custom-select-trigger .trigger-text {
            font-size: 17px;
            font-family: var(--font-family);
            color: rgba(51, 63, 72, 0.3);
            transition: color 0.3s ease;
        }

        .custom-select.has-value .trigger-text {
            color: var(--color-text-dark);
        }

        .custom-select-trigger .trigger-arrow {
            font-size: 11px;
            color: rgba(51, 63, 72, 0.3);
            transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), color 0.3s ease;
        }

        .custom-select.open .trigger-arrow {
            transform: rotate(180deg);
            color: var(--color-accent);
        }

        .custom-select-options {
            position: absolute;
            top: calc(100% + 8px);
            left: -16px;
            right: -16px;
            background: #ffffff;
            border: 1px solid rgba(51, 63, 72, 0.1);
            border-radius: 12px;
            padding: 8px 0;
            opacity: 0;
            visibility: hidden;
            transform: translateY(-8px);
            transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
            z-index: 50;
            box-shadow: 0 16px 56px rgba(51, 63, 72, 0.14), 0 4px 12px rgba(51, 63, 72, 0.06);
            overflow: hidden;
        }

        .custom-select.open .custom-select-options {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .custom-option {
            padding: 14px 24px;
            font-size: 15px;
            font-family: var(--font-family);
            color: var(--color-text-dark);
            cursor: pointer;
            transition: background 0.25s ease, color 0.25s ease, padding-left 0.3s ease;
            position: relative;
        }

        .custom-option:hover {
            background: rgba(161, 130, 105, 0.1);
            color: var(--color-accent);
            padding-left: 30px;
        }

        .custom-option.selected {
            color: #ffffff;
            font-weight: 600;
            background: var(--color-accent);
            padding-left: 30px;
        }

        .custom-option.selected::before {
            content: '';
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background: #ffffff;
        }

        /* Hidden real select for form submission */
        .custom-select select {
            display: none;
        }

        /* ================= Grid Layouts ================= */
        .input-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
        }

        /* ================= Step Navigation ================= */
        .step-navigation {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 64px;
            gap: 20px;
        }

        .step-nav-left {
            display: flex;
            align-items: center;
            flex-direction: column;
            align-items: flex-start;
            gap: 8px;
        }

        .step-nav-right {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .btn-voltar {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 32px;
            border: 1px solid var(--color-border);
            border-radius: 100px;
            background: transparent;
            color: var(--color-text-dark);
            font-size: 12px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.14em;
            cursor: pointer;
            font-family: var(--font-family);
            transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
            opacity: 0.6;
        }

        .btn-voltar:hover {
            opacity: 1;
            border-color: var(--color-text-dark);
            transform: translateX(-4px);
        }

        .btn-voltar .arrow-back {
            display: inline-block;
            transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
            font-size: 14px;
        }

        .btn-voltar:hover .arrow-back {
            transform: translateX(-4px);
        }

        .btn-continuar {
            padding: 20px 48px;
            border: none;
            border-radius: 100px;
            background-color: var(--color-text-dark);
            color: var(--color-bg-light);
            font-size: 12px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.18em;
            cursor: pointer;
            font-family: var(--font-family);
            transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
            display: inline-flex;
            justify-content: center;
            align-items: center;
            position: relative;
            overflow: hidden;
        }

        .btn-continuar::before {
            content: '';
            position: absolute;
            inset: 0;
            background: var(--color-accent);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
            z-index: 0;
        }

        .btn-continuar:hover::before {
            transform: scaleX(1);
        }

        .btn-continuar span {
            position: relative;
            z-index: 1;
        }

        .btn-continuar:hover {
            transform: translateY(-2px);
            box-shadow: 0 14px 40px rgba(161, 130, 105, 0.18);
        }

        /* Submit button — same style as continuar, slightly larger */
        .submit-btn {
            padding: 22px 56px;
            border: none;
            border-radius: 100px;
            background-color: var(--color-text-dark);
            color: var(--color-bg-light);
            font-size: 12px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.18em;
            cursor: pointer;
            font-family: var(--font-family);
            transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
            display: inline-flex;
            justify-content: center;
            align-items: center;
            position: relative;
            overflow: hidden;
        }

        .submit-btn::before {
            content: '';
            position: absolute;
            inset: 0;
            background: var(--color-accent);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
            z-index: 0;
        }

        .submit-btn:hover::before {
            transform: scaleX(1);
        }

        .submit-btn span {
            position: relative;
            z-index: 1;
        }

        .submit-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 14px 40px rgba(161, 130, 105, 0.18);
        }

        .submit-note {
            font-size: 13px;
            color: rgba(51, 63, 72, 0.35);
            font-weight: 400;
            margin-top: 20px;
        }

        /* Step counter */
        .step-counter {
            font-size: 12px;
            font-weight: 500;
            color: rgba(51, 63, 72, 0.3);
            letter-spacing: 0.08em;
        }

        .step-counter .current-num {
            color: var(--color-accent);
            font-weight: 600;
        }

        .step-hint-message {
            margin: 0;
            font-size: 12px;
            line-height: 1.35;
            color: rgba(51, 63, 72, 0.46);
            letter-spacing: 0.01em;
            max-width: 320px;
        }

        .step-hint-message.is-error {
            color: #b85a4f;
        }

        .step-hint-message.is-success {
            color: #4e7a5d;
        }

        /* ================= Footer ================= */
        .site-footer {
            width: 100vw;
            max-width: 100%;
            background: var(--color-slate-blue);
            color: var(--color-cream);
        }

        .footer-bar {
            width: 100%;
            max-width: 1800px;
            margin: 0 auto;
            padding: 40px 5vw;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .footer-logo img {
            height: 31px;
            width: auto;
            opacity: 0.6;
            transition: opacity 0.4s ease;
            filter: brightness(0) invert(1);
        }

        .footer-logo:hover img { opacity: 1; }

        .footer-nav {
            display: flex;
            align-items: center;
            gap: 36px;
        }

        .footer-link {
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.14em;
            text-transform: uppercase;
            color: var(--color-warm-grey);
            text-decoration: none;
            position: relative;
            padding: 4px 0;
            transition: color 0.4s ease;
        }

        .footer-link:hover { color: var(--color-cream); }

        .footer-top-btn {
            font-size: 19px;
            color: var(--color-warm-grey);
            background: none;
            border: none;
            cursor: pointer;
            padding: 4px 0;
            line-height: 1;
            font-family: var(--font-family);
            transition: color 0.4s ease, transform 0.4s ease;
        }

        .footer-top-btn:hover {
            color: var(--color-cream);
            transform: translateY(-3px);
        }

        /* ================= Scroll Reveal ================= */
        .reveal {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.62s cubic-bezier(0.22, 1, 0.36, 1), transform 0.62s cubic-bezier(0.22, 1, 0.36, 1);
        }

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

        /* ================= Mobile ================= */
        @media (max-width: 768px) {
            .nav-menu { display: none; }
            .input-row { grid-template-columns: 1fr; gap: 44px; }
            .briefing-page { padding-top: 150px; padding-bottom: 100px; }
            .intro-section { margin-bottom: 52px; }
            .section-ghost { display: none; }

            .step-label { display: none; }
            .progress-bar { margin-bottom: 52px; }

            .step-navigation { 
                flex-direction: column-reverse; 
                gap: 16px; 
                padding-top: 52px; 
            }

            .step-nav-left, .step-nav-right { width: 100%; }
            .btn-voltar { width: 100%; justify-content: center; }
            .btn-continuar, .submit-btn { width: 100%; }
            .step-nav-left { align-items: center; }
            .step-counter { text-align: center; width: 100%; }
            .step-hint-message { text-align: center; max-width: 100%; }
        }

        @media (max-width: 480px) {
            .progress-steps { gap: 0; }
            .step-dot { width: 8px; height: 8px; }
        }