/* ============================================
   B Y B GROUP — Landing Page Styles
   Aesthetic: Dark Editorial / Tech-Luxe
   ============================================ */

/* --- Custom Properties --- */
:root {
    --c-bg:        #0a0a0b;
    --c-bg-elevated: #111113;
    --c-bg-card:   #16161a;
    --c-surface:   #1e1e23;
    --c-border:    #2a2a30;
    --c-text:      #e8e6e3;
    --c-text-dim:  #8a8a8f;
    --c-text-muted:#5a5a5f;
    --c-accent:    #b8935a;
    --c-accent-light: #cda876;
    --c-accent-glow: rgba(184, 147, 90, 0.15);
    --c-white:     #f5f4f1;

    --ff-display: 'DM Serif Display', Georgia, serif;
    --ff-body:    'Outfit', -apple-system, sans-serif;

    --fs-hero:   clamp(2rem, 4vw, 3.8rem);
    --fs-h2:     clamp(2rem, 4.5vw, 3.8rem);
    --fs-h3:     clamp(1.25rem, 2vw, 1.6rem);
    --fs-body:   clamp(0.95rem, 1.1vw, 1.1rem);
    --fs-small:  0.85rem;
    --fs-label:  0.75rem;

    --space-xs:  0.5rem;
    --space-sm:  1rem;
    --space-md:  2rem;
    --space-lg:  4rem;
    --space-xl:  8rem;
    --space-2xl: 12rem;

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;

    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);

    --nav-height: 72px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

body {
    font-family: var(--ff-body);
    font-size: var(--fs-body);
    color: var(--c-text);
    background: var(--c-bg);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

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

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

button, input, select, textarea {
    font: inherit;
    color: inherit;
}

::selection {
    background: var(--c-accent);
    color: var(--c-bg);
}

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: var(--nav-height);
    transition: background 0.4s ease, box-shadow 0.4s ease;
}

.nav--scrolled {
    background: rgba(10, 10, 11, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 var(--c-border);
}

.nav__inner {
    max-width: 1320px;
    margin: 0 auto;
    height: 100%;
    padding: 0 var(--space-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    z-index: 101;
}

.nav__logo-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--c-accent);
    color: var(--c-bg);
    font-family: var(--ff-display);
    font-size: 1.2rem;
    border-radius: var(--radius-sm);
}

.nav__logo-text {
    font-family: var(--ff-display);
    font-size: 1.35rem;
    color: var(--c-white);
    letter-spacing: -0.02em;
}

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

.nav__link {
    font-size: var(--fs-small);
    font-weight: 500;
    color: var(--c-text-dim);
    letter-spacing: 0.03em;
    text-transform: uppercase;
    position: relative;
    transition: color 0.3s ease;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--c-accent);
    transition: width 0.3s var(--ease-out);
}

.nav__link:hover {
    color: var(--c-white);
}

.nav__link:hover::after {
    width: 100%;
}

.nav__link--cta {
    background: var(--c-accent);
    color: var(--c-bg);
    padding: 0.5rem 1.2rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    transition: background 0.3s ease, transform 0.2s ease;
}

.nav__link--cta::after {
    display: none;
}

.nav__link--cta:hover {
    background: var(--c-accent-light);
    color: var(--c-bg);
    transform: translateY(-1px);
}

.nav__burger {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 101;
}

.nav__burger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--c-white);
    transition: transform 0.3s ease, opacity 0.3s ease;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--ff-body);
    font-size: var(--fs-small);
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    padding: 0.9rem 2rem;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: all 0.3s var(--ease-out);
    white-space: nowrap;
}

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

.btn--primary:hover {
    background: var(--c-accent-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(201, 168, 76, 0.25);
}

.btn--ghost {
    background: transparent;
    color: var(--c-text-dim);
    border: 1px solid var(--c-border);
}

.btn--ghost:hover {
    color: var(--c-white);
    border-color: var(--c-text-dim);
    transform: translateY(-2px);
}

.btn--full {
    width: 100%;
    justify-content: center;
}

/* --- Hero --- */
.hero {
    position: relative;
    min-height: 50vh;
    display: flex;
    align-items: flex-start;
    padding: calc(var(--nav-height) + var(--space-xl)) var(--space-md) var(--space-lg);
    overflow: hidden;
}

.hero__grid-bg {
    position: absolute;
    inset: 0;
    opacity: 0.08;
    pointer-events: none;
    background-image:
        linear-gradient(var(--c-accent) 1px, transparent 1px),
        linear-gradient(90deg, var(--c-accent) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 70%);
    transform: perspective(600px) rotateX(2deg);
    transition: transform 0.1s linear;
}

.hero__content {
    max-width: 1320px;
    margin: 0 auto;
    width: 100%;
    position: relative;
    z-index: 1;
}

.hero__badge {
    display: inline-block;
    font-size: var(--fs-label);
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--c-accent);
    padding: 0.4rem 1rem;
    border: 1px solid rgba(201, 168, 76, 0.3);
    border-radius: 100px;
    margin-bottom: var(--space-md);
}

.hero__title {
    font-family: var(--ff-display);
    font-size: var(--fs-hero);
    font-weight: 400;
    line-height: 1.05;
    letter-spacing: -0.03em;
    color: var(--c-white);
    margin-bottom: var(--space-md);
}

.hero__title-accent {
    color: var(--c-accent);
    font-style: italic;
}

.hero__sub {
    max-width: 540px;
    font-size: clamp(1rem, 1.3vw, 1.2rem);
    color: var(--c-text-dim);
    line-height: 1.7;
    margin-bottom: var(--space-lg);
}

.hero__actions {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.hero__scroll-hint {
    position: absolute;
    bottom: var(--space-md);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--c-text-muted);
    font-size: var(--fs-label);
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.hero__scroll-line {
    width: 1px;
    height: 48px;
    background: linear-gradient(to bottom, var(--c-accent), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
    50% { opacity: 1; transform: scaleY(1); }
}

/* --- Section Shared --- */
.section__header {
    max-width: 1320px;
    margin: 0 auto var(--space-lg);
    padding: 0 var(--space-md);
}

.section__label {
    display: block;
    font-size: var(--fs-label);
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--c-accent);
    margin-bottom: var(--space-sm);
}

.section__title {
    font-family: var(--ff-display);
    font-size: var(--fs-h2);
    font-weight: 400;
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: var(--c-white);
}

/* --- Services --- */
.services {
    padding: var(--space-xl) 0;
    position: relative;
}

.services::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: min(80%, 900px);
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--c-border), transparent);
}

.services__grid {
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 var(--space-md);
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.service-card {
    background: var(--c-bg-card);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    padding: var(--space-md) var(--space-md) var(--space-md);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    transition: transform 0.4s var(--ease-out), border-color 0.4s ease, box-shadow 0.4s ease;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--c-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s var(--ease-out);
}

.service-card:hover {
    transform: translateY(-4px);
    border-color: rgba(201, 168, 76, 0.25);
    box-shadow: 0 16px 64px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(201, 168, 76, 0.08);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card__number {
    font-family: var(--ff-display);
    font-size: 3rem;
    color: var(--c-surface);
    position: absolute;
    top: var(--space-sm);
    right: var(--space-md);
    line-height: 1;
    transition: color 0.4s ease;
}

.service-card:hover .service-card__number {
    color: var(--c-accent-glow);
}

.service-card__icon {
    width: 48px;
    height: 48px;
    color: var(--c-accent);
    margin-bottom: var(--space-md);
    transition: transform 0.4s var(--ease-out);
}

.service-card:hover .service-card__icon {
    transform: scale(1.08);
}

.service-card__title {
    font-family: var(--ff-display);
    font-size: var(--fs-h3);
    font-weight: 400;
    color: var(--c-white);
    margin-bottom: var(--space-sm);
    line-height: 1.3;
}

.service-card__desc {
    color: var(--c-text-dim);
    font-size: var(--fs-small);
    line-height: 1.7;
    margin-bottom: var(--space-md);
    flex-grow: 1;
}

.service-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    list-style: none;
    margin-bottom: var(--space-md);
}

.service-card__tags li {
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--c-text-muted);
    padding: 0.3rem 0.7rem;
    border: 1px solid var(--c-border);
    border-radius: 100px;
    transition: border-color 0.3s ease, color 0.3s ease;
}

.service-card:hover .service-card__tags li {
    border-color: rgba(201, 168, 76, 0.2);
    color: var(--c-text-dim);
}

.service-card__link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: var(--fs-small);
    font-weight: 600;
    color: var(--c-accent);
    letter-spacing: 0.03em;
    transition: gap 0.3s var(--ease-out);
}

.service-card__link:hover {
    gap: 0.8rem;
}

/* --- About --- */
.about {
    padding: var(--space-xl) 0;
    background: var(--c-bg-elevated);
    position: relative;
}

.about::before,
.about::after {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: min(80%, 900px);
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--c-border), transparent);
}

.about::before { top: 0; }
.about::after { bottom: 0; }

.about__inner {
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 var(--space-md);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: start;
}

.about__title {
    font-family: var(--ff-display);
    font-size: var(--fs-h2);
    font-weight: 400;
    line-height: 1.15;
    color: var(--c-white);
    letter-spacing: -0.02em;
    margin-top: var(--space-sm);
}

.about__text {
    color: var(--c-text-dim);
    font-size: clamp(1rem, 1.2vw, 1.1rem);
    line-height: 1.8;
    margin-bottom: var(--space-lg);
    text-align: justify;
}

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

.about__stat {
    display: flex;
    flex-direction: column;
}

.about__stat-number {
    font-family: var(--ff-display);
    font-size: clamp(2rem, 3.5vw, 3rem);
    color: var(--c-accent);
    line-height: 1;
}

.about__stat-suffix {
    font-family: var(--ff-display);
    font-size: clamp(1.5rem, 2.5vw, 2rem);
    color: var(--c-accent);
}

.about__stat-label {
    font-size: var(--fs-small);
    color: var(--c-text-muted);
    margin-top: 0.3rem;
}

/* --- Process --- */
.process {
    padding: var(--space-xl) 0;
}

.process__steps {
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 var(--space-md);
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
    position: relative;
}

.process__steps::before {
    content: '';
    position: absolute;
    top: 28px;
    left: calc(var(--space-md) + 20px);
    right: calc(var(--space-md) + 20px);
    height: 1px;
    background: repeating-linear-gradient(90deg, var(--c-border) 0, var(--c-border) 8px, transparent 8px, transparent 16px);
}

.process__step {
    text-align: center;
    position: relative;
}

.process__step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border: 1px solid var(--c-border);
    border-radius: 50%;
    font-family: var(--ff-display);
    font-size: 1.1rem;
    color: var(--c-accent);
    background: var(--c-bg);
    margin-bottom: var(--space-md);
    position: relative;
    z-index: 1;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.process__step:hover .process__step-num {
    border-color: var(--c-accent);
    box-shadow: 0 0 24px var(--c-accent-glow);
}

.process__step-title {
    font-family: var(--ff-display);
    font-size: var(--fs-h3);
    color: var(--c-white);
    margin-bottom: var(--space-xs);
}

.process__step-desc {
    font-size: var(--fs-small);
    color: var(--c-text-dim);
    line-height: 1.65;
    max-width: 240px;
    margin: 0 auto;
}

/* --- Contact --- */
.contact {
    padding: var(--space-xl) 0;
    background: var(--c-bg-elevated);
    position: relative;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: min(80%, 900px);
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--c-border), transparent);
}

.contact__inner {
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 var(--space-md);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: start;
}

.contact__title {
    font-family: var(--ff-display);
    font-size: var(--fs-h2);
    font-weight: 400;
    line-height: 1.15;
    color: var(--c-white);
    margin: var(--space-sm) 0 var(--space-md);
    letter-spacing: -0.02em;
}

.contact__title-accent {
    color: var(--c-accent);
    font-style: italic;
}

.contact__desc {
    color: var(--c-text-dim);
    line-height: 1.75;
    max-width: 440px;
}

/* --- Form --- */
.contact__form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-sm);
}

.form__group {
    position: relative;
}

.form__group--full {
    grid-column: 1 / -1;
}

.form__group input,
.form__group select,
.form__group textarea {
    width: 100%;
    background: var(--c-bg);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-sm);
    padding: 1rem 1rem 0.6rem;
    color: var(--c-white);
    font-size: var(--fs-body);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    outline: none;
}

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

.form__group select {
    appearance: none;
    cursor: pointer;
    padding-top: 1.2rem;
}

.form__group label {
    position: absolute;
    top: 50%;
    left: 1rem;
    transform: translateY(-50%);
    font-size: var(--fs-small);
    color: var(--c-text-muted);
    pointer-events: none;
    transition: all 0.2s ease;
}

.form__group textarea ~ label {
    top: 1rem;
    transform: none;
}

.form__group input:focus ~ label,
.form__group input:not(:placeholder-shown) ~ label,
.form__group select:focus ~ label,
.form__group select:valid ~ label,
.form__group textarea:focus ~ label,
.form__group textarea:not(:placeholder-shown) ~ label {
    top: 0.35rem;
    transform: none;
    font-size: 0.65rem;
    color: var(--c-accent);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.form__group input:focus,
.form__group select:focus,
.form__group textarea:focus {
    border-color: var(--c-accent);
    box-shadow: 0 0 0 3px var(--c-accent-glow);
}

.contact__form .btn {
    grid-column: 1 / -1;
    margin-top: var(--space-xs);
}

/* --- Footer --- */
.footer {
    padding: var(--space-lg) 0 var(--space-md);
    border-top: 1px solid var(--c-border);
}

.footer__inner {
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 var(--space-md) var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: start;
}

.footer__tagline {
    color: var(--c-text-muted);
    font-size: var(--fs-small);
    margin-top: 0.5rem;
}

.footer__links {
    display: flex;
    gap: var(--space-xl);
}

.footer__col {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer__col h4 {
    font-size: var(--fs-label);
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--c-text-dim);
    margin-bottom: 0.3rem;
}

.footer__col a {
    font-size: var(--fs-small);
    color: var(--c-text-muted);
    transition: color 0.3s ease;
}

.footer__col a:hover {
    color: var(--c-accent);
}

.footer__bottom {
    max-width: 1320px;
    margin: 0 auto;
    padding: var(--space-md) var(--space-md) 0;
    border-top: 1px solid var(--c-border);
}

.footer__bottom p {
    font-size: var(--fs-small);
    color: var(--c-text-muted);
}

/* --- Animations --- */
.anim-fade-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s var(--ease-out) forwards;
    animation-delay: var(--delay, 0s);
}

@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.anim-reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
    transition-delay: var(--delay, 0s);
}

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

/* --- Responsive --- */
@media (max-width: 1024px) {
    .services__grid {
        grid-template-columns: 1fr;
        max-width: 600px;
    }

    .about__inner {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }

    .contact__inner {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }

    .process__steps {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-lg) var(--space-md);
    }

    .process__steps::before {
        display: none;
    }
}

@media (max-width: 768px) {
    .nav__links {
        position: fixed;
        inset: 0;
        background: rgba(10, 10, 11, 0.97);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: var(--space-md);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.4s ease;
    }

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

    .nav__links .nav__link {
        font-size: 1.2rem;
    }

    .nav__burger {
        display: flex;
    }

    .nav__burger.is-open span:first-child {
        transform: rotate(45deg) translate(3px, 3px);
    }

    .nav__burger.is-open span:last-child {
        transform: rotate(-45deg) translate(3px, -3px);
    }

    .hero__actions {
        flex-direction: column;
    }

    .hero__actions .btn {
        justify-content: center;
    }

    .about__stats {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-sm);
    }

    .process__steps {
        grid-template-columns: 1fr;
        max-width: 360px;
    }

    .contact__form {
        grid-template-columns: 1fr;
    }

    .footer__inner {
        flex-direction: column;
        gap: var(--space-lg);
    }
}

@media (max-width: 480px) {
    :root {
        --space-xl: 5rem;
    }
}

/* --- WhatsApp Floating Button --- */
.whatsapp-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 99;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: #25d366;
    color: #fff;
    border-radius: 50%;
    box-shadow: 0 4px 16px rgba(37, 211, 102, 0.35);
    transition: transform 0.3s var(--ease-out), box-shadow 0.3s ease;
}

.whatsapp-btn svg {
    width: 30px;
    height: 30px;
}

.whatsapp-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 24px rgba(37, 211, 102, 0.5);
}