/* ==========================================================================
   CUSTOM PROPERTIES
   ========================================================================== */

:root {
    --color-primary: #381d92;
    --color-primary-dark: #1C0A63;
    --color-bg: #ffffff;
    --color-bg-alt: #F2F2FA;
    --color-text: #0B0620;
    --color-text-light: #5a5673;
    --color-border: #e2e0ec;

    --font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;

    --fs-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
    --fs-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
    --fs-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
    --fs-lg: clamp(1.125rem, 1rem + 0.5vw, 1.35rem);
    --fs-xl: clamp(1.5rem, 1.2rem + 1.5vw, 2.25rem);
    --fs-2xl: clamp(2rem, 1.5rem + 2.5vw, 3.25rem);

    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;

    --radius: 8px;
    --radius-lg: 12px;
    --shadow: 0 1px 3px rgba(11, 6, 32, 0.08);
    --shadow-lg: 0 8px 30px rgba(11, 6, 32, 0.1);
    --transition: 0.3s ease;

    --header-height: 72px;
    --container-max: 1140px;
}

/* ==========================================================================
   RESET & BASE
   ========================================================================== */

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

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

body {
    font-family: var(--font-family);
    font-size: var(--fs-base);
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--color-primary-dark);
}

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

ul {
    list-style: none;
}

/* ==========================================================================
   UTILITIES
   ========================================================================== */

.container {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--space-md);
}

.section__title {
    font-size: var(--fs-xl);
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: var(--space-xs);
}

.section__subtitle {
    font-size: var(--fs-lg);
    color: var(--color-text-light);
    margin-bottom: var(--space-xl);
    max-width: 600px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    font-family: var(--font-family);
    font-size: var(--fs-sm);
    font-weight: 600;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    line-height: 1;
}

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

.btn--primary:hover {
    background-color: var(--color-primary-dark);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

/* ==========================================================================
   HEADER
   ========================================================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: box-shadow var(--transition);
}

.header--scrolled {
    box-shadow: var(--shadow);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.header__logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    color: var(--color-text);
    text-decoration: none;
    flex-shrink: 0;
}

.header__logo:hover {
    color: var(--color-primary);
}

.header__logo-name {
    font-size: var(--fs-lg);
    font-weight: 700;
}

.header__logo-separator {
    color: var(--color-border);
    font-weight: 300;
}

.header__logo-tagline {
    font-size: var(--fs-sm);
    font-weight: 400;
    color: var(--color-text-light);
}

/* Hamburger */

.header__hamburger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1001;
}

.header__hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition);
    transform-origin: center;
}

.header__hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.header__hamburger.active span:nth-child(2) {
    opacity: 0;
}

.header__hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Navigation */

.header__nav {
    position: fixed;
    top: 0;
    right: 0;
    width: min(300px, 80vw);
    height: 100vh;
    height: 100dvh;
    background-color: var(--color-bg);
    padding: calc(var(--header-height) + var(--space-lg)) var(--space-lg) var(--space-lg);
    transform: translateX(100%);
    transition: transform var(--transition);
    box-shadow: -5px 0 30px rgba(0, 0, 0, 0.1);
    z-index: 999;
}

.header__nav.open {
    transform: translateX(0);
}

.header__nav-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.header__nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) 0;
    font-size: var(--fs-lg);
    font-weight: 500;
    color: var(--color-text);
    transition: color var(--transition);
}

.header__nav-link:hover,
.header__nav-link.active {
    color: var(--color-primary);
}

.header__nav-link--linkedin {
    color: var(--color-text-light);
}

.header__nav-link--linkedin:hover {
    color: #0A66C2;
}

/* Overlay */

.nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(11, 6, 32, 0.4);
    z-index: 998;
}

.nav-overlay.active {
    display: block;
}

/* ==========================================================================
   HERO
   ========================================================================== */

.hero {
    padding-top: calc(var(--header-height) + var(--space-2xl));
    padding-bottom: var(--space-2xl);
    background: linear-gradient(160deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
    text-align: center;
}

.hero__inner {
    max-width: 750px;
    margin-inline: auto;
}

.hero__title {
    font-size: var(--fs-2xl);
    font-weight: 700;
    color: var(--color-primary-dark);
    line-height: 1.2;
    margin-bottom: var(--space-md);
}

.hero__subtitle {
    font-size: var(--fs-lg);
    color: var(--color-text-light);
    line-height: 1.6;
    margin-bottom: var(--space-lg);
}

.hero__cta {
    font-size: var(--fs-base);
    padding: 1rem 2.5rem;
}

/* ==========================================================================
   SERVICES
   ========================================================================== */

.services {
    padding: var(--space-2xl) 0;
}

.pillars {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
}

.pillar {
    padding: var(--space-xl) var(--space-lg);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-top: 4px solid var(--color-primary);
    border-radius: var(--radius-lg);
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}

.pillar:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.pillar__icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    color: var(--color-primary);
    margin-bottom: var(--space-md);
}

.pillar__title {
    font-size: var(--fs-xl);
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: var(--space-sm);
}

.pillar__benefit {
    font-size: var(--fs-base);
    color: var(--color-text);
    line-height: 1.7;
    flex: 1;
    margin-bottom: var(--space-lg);
}

.pillar__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    margin-top: auto;
}

.pillar__tag {
    font-size: var(--fs-xs);
    color: var(--color-text-light);
    background-color: var(--color-bg-alt);
    padding: 0.25rem 0.75rem;
    border-radius: 100px;
}

/* ==========================================================================
   SERVICES V2 — pillars with sub-service list
   ========================================================================== */

.pillars--v2 {
    grid-template-columns: 1fr;
    gap: var(--space-md);
    align-items: stretch;
}

.pillar--v2 {
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
}

.pillar--v2:hover {
    transform: translateY(-3px);
}

.pillar__header {
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--color-border);
}

.pillar__header .pillar__icon {
    margin-bottom: var(--space-sm);
}

.pillar__header .pillar__title {
    margin-bottom: 0.25rem;
}

.pillar__header .pillar__benefit {
    margin-bottom: 0;
    font-size: var(--fs-sm);
    color: var(--color-text-light);
}

.pillar__services {
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.4s ease;
}

.pillar--open .pillar__services {
    max-height: 600px;
}

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

.service-item:first-child {
    padding-top: var(--space-md);
}

.service-item:last-child {
    border-bottom: none;
}

.service-item__name {
    font-size: var(--fs-sm);
    font-weight: 600;
    color: var(--color-primary-dark);
    margin-bottom: 0.2rem;
}

.service-item__desc {
    font-size: var(--fs-xs);
    color: var(--color-text-light);
    line-height: 1.6;
}

.pillar__toggle {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    margin-top: var(--space-md);
    font-size: var(--fs-xs);
    font-weight: 600;
    color: var(--color-primary);
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    font-family: var(--font-family);
    transition: color var(--transition);
    pointer-events: none;
}

.pillar--v2 {
    cursor: pointer;
}

.pillar--v2:hover .pillar__toggle {
    color: var(--color-primary-dark);
}

.pillar__toggle svg {
    transition: transform 0.35s ease;
    flex-shrink: 0;
}

.pillar--open .pillar__toggle svg {
    transform: rotate(180deg);
}


/* ==========================================================================
   CASES
   ========================================================================== */

.cases {
    padding: var(--space-2xl) 0;
    background-color: var(--color-bg-alt);
}

.cases__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
}

.case-card {
    padding: var(--space-lg);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition);
}

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

.case-card__tag {
    display: inline-block;
    font-size: var(--fs-xs);
    font-weight: 600;
    color: var(--color-primary);
    background-color: rgba(56, 29, 146, 0.08);
    padding: 0.2rem 0.65rem;
    border-radius: 100px;
    margin-bottom: var(--space-sm);
    letter-spacing: 0.03em;
}

.case-card__title {
    font-size: var(--fs-lg);
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: var(--space-xs);
}

.case-card__text {
    font-size: var(--fs-sm);
    color: var(--color-text-light);
    line-height: 1.7;
}

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

/* ==========================================================================
   AI
   ========================================================================== */

.ai {
    padding: var(--space-2xl) 0;
    background: linear-gradient(160deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    color: #fff;
}

.ai .section__title {
    color: #fff;
}

.ai .section__subtitle {
    color: rgba(255, 255, 255, 0.8);
}

.ai__text {
    font-size: var(--fs-base);
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.9);
    max-width: 750px;
    margin-bottom: var(--space-xl);
}

.ai__points {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
}

.ai__point {
    padding: var(--space-md);
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    border-left: 3px solid rgba(255, 255, 255, 0.4);
}

.ai__point-title {
    font-size: var(--fs-base);
    font-weight: 600;
    color: #fff;
    margin-bottom: 0.25rem;
}

.ai__point-text {
    font-size: var(--fs-sm);
    color: rgba(255, 255, 255, 0.8);
}

@media (min-width: 768px) {
    .ai__points {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ==========================================================================
   ABOUT
   ========================================================================== */

.about {
    padding: var(--space-2xl) 0;
    background-color: var(--color-bg-alt);
}

.about__content {
    max-width: 750px;
}

.about__text {
    font-size: var(--fs-base);
    color: var(--color-text);
    margin-bottom: var(--space-sm);
    line-height: 1.8;
}

.about__num {
    font-size: var(--fs-xl);
    font-weight: 700;
    color: var(--color-primary);
}

.about__employers {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
    margin-bottom: var(--space-lg);
}

@media (min-width: 600px) {
    .about__employers {
        grid-template-columns: repeat(3, 1fr);
    }
}

.employer {
    padding: var(--space-md);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-left: 3px solid var(--color-border);
    border-radius: var(--radius);
}

.employer--current {
    border-left-color: var(--color-primary);
}

.employer__years {
    font-size: var(--fs-xs);
    color: var(--color-text-light);
    margin-bottom: 0.25rem;
}

.employer__name {
    font-size: var(--fs-base);
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: 0.2rem;
}

.employer__role {
    font-size: var(--fs-xs);
    color: var(--color-text-light);
    margin-bottom: var(--space-xs);
}

.employer__scope {
    font-size: var(--fs-xs);
    font-weight: 500;
    color: var(--color-primary);
}

.about__tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.tech-badge {
    font-size: var(--fs-xs);
    font-weight: 500;
    color: var(--color-text-light);
    border: 1px solid var(--color-border);
    padding: 0.3rem 0.8rem;
    border-radius: 100px;
    background-color: var(--color-bg);
}

.about__motto {
    font-size: var(--fs-lg);
    color: var(--color-primary);
    margin-top: var(--space-md);
    margin-bottom: var(--space-xl);
}

.about__motto strong {
    color: var(--color-primary-dark);
}

.about__values {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
}

.value {
    padding: var(--space-md);
    background-color: var(--color-bg);
    border-radius: var(--radius);
    border-left: 3px solid var(--color-primary);
}

.value__title {
    font-size: var(--fs-base);
    font-weight: 600;
    color: var(--color-primary-dark);
    margin-bottom: 0.25rem;
}

.value__text {
    font-size: var(--fs-sm);
    color: var(--color-text-light);
}

/* ==========================================================================
   CONTACT
   ========================================================================== */

.contact {
    padding: var(--space-2xl) 0;
}

.contact__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
}

.contact__name {
    font-size: var(--fs-xl);
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: var(--space-md);
}

.contact__list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.contact__item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--fs-base);
    color: var(--color-text);
}

.contact__item svg {
    flex-shrink: 0;
    color: var(--color-primary);
}

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

.contact__item a:hover {
    color: var(--color-primary);
}

/* Form */

.contact__form {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.form__label {
    display: block;
    font-size: var(--fs-sm);
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 0.375rem;
}

.form__input {
    width: 100%;
    padding: 0.75rem 1rem;
    font-family: var(--font-family);
    font-size: var(--fs-base);
    color: var(--color-text);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
}

.form__input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(56, 29, 146, 0.1);
}

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

.form__submit {
    align-self: flex-start;
    min-width: 200px;
}

.form__counter {
    display: block;
    margin-top: 0.25rem;
    font-size: var(--fs-xs);
    color: var(--color-text-light);
    text-align: right;
}

.form__status {
    display: block;
    margin-top: var(--space-sm);
    font-size: var(--fs-sm);
    font-weight: 500;
    min-height: 1.5em;
}

.form__status--ok {
    color: #1a7a3c;
}

.form__status--err {
    color: #c0392b;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */

.footer {
    padding: var(--space-lg) 0;
    background-color: var(--color-primary-dark);
    color: rgba(255, 255, 255, 0.7);
    text-align: center;
}

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

.footer__copy {
    font-size: var(--fs-sm);
    color: #fff;
    font-weight: 500;
}

.footer__info {
    font-size: var(--fs-xs);
}

.footer__info a {
    color: rgba(255, 255, 255, 0.7);
}

.footer__info a:hover {
    color: #fff;
}

/* ==========================================================================
   RESPONSIVE — TABLET (768px+)
   ========================================================================== */

@media (min-width: 768px) {

    .pillars {
        grid-template-columns: repeat(3, 1fr);
    }

    .about__values {
        grid-template-columns: repeat(3, 1fr);
    }

    .contact__grid {
        grid-template-columns: 1fr 1fr;
        align-items: start;
    }
}

/* ==========================================================================
   RESPONSIVE — DESKTOP (1024px+)
   ========================================================================== */

@media (min-width: 1024px) {

    /* Header — inline nav */
    .header__hamburger {
        display: none;
    }

    .header__nav {
        position: static;
        width: auto;
        height: auto;
        background: none;
        padding: 0;
        transform: none;
        box-shadow: none;
    }

    .header__nav-list {
        flex-direction: row;
        align-items: center;
        gap: var(--space-md);
    }

    .header__nav-link {
        font-size: var(--fs-sm);
        padding: var(--space-xs) 0;
        position: relative;
    }

    .header__nav-link::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 0;
        height: 2px;
        background-color: var(--color-primary);
        transition: width var(--transition);
    }

    .header__nav-link:hover::after,
    .header__nav-link.active::after {
        width: 100%;
    }

    .header__nav-link--linkedin::after {
        display: none;
    }

    .nav-overlay {
        display: none !important;
    }


    /* Services v2 — 2x2 grid */
    .pillars--v2 {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Footer — row */
    .footer__inner {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

/* ==========================================================================
   ACCESSIBILITY
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ==========================================================================
   COOKIE BANNER
   ========================================================================== */

.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 9000;
    background: #fff;
    border-top: 1px solid var(--color-border);
    box-shadow: 0 -4px 20px rgba(11, 6, 32, 0.08);
    transform: translateY(100%);
    transition: transform 0.35s ease;
}

.cookie-banner.cookie-banner--visible {
    transform: translateY(0);
}

.cookie-banner__inner {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding-top: var(--space-sm);
    padding-bottom: var(--space-sm);
    flex-wrap: wrap;
}

.cookie-banner__text {
    flex: 1;
    font-size: var(--fs-sm);
    color: var(--color-text-light);
    min-width: 200px;
}

.cookie-banner__btn {
    flex-shrink: 0;
    padding: 0.6rem 1.5rem;
    font-size: var(--fs-sm);
}

@media (prefers-reduced-motion: reduce) {
    .cookie-banner {
        transition: none;
    }
}

/* Skip link (for screen readers) */
.skip-link {
    position: absolute;
    top: -100%;
    left: 0;
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-primary);
    color: #fff;
    z-index: 9999;
}

.skip-link:focus {
    top: 0;
}