/* ============================================
   KoruAnalytics - Landing Page Styles
   Refined minimalism | Mobile-first | WCAG AA
   ============================================ */

/* --------------------------------------------
   CSS Variables
   -------------------------------------------- */
:root {
    /* Colors */
    --color-primary: #1a9bba;
    --color-primary-dark: #147a94;
    --color-text: #1a1a1a;
    --color-text-light: #5a5a5a;
    --color-bg: #ffffff;
    --color-bg-alt: #f8f9fa;
    --color-border: #e5e7eb;

    /* Typography */
    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    /* Layout */
    --max-width: 1200px;
    --nav-height: 80px;

    /* Transitions */
    --transition-base: 0.3s ease;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
}

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

* {
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
}

body.nav-open {
    overflow: hidden;
}

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

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

ul,
ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* --------------------------------------------
   Typography
   -------------------------------------------- */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-text);
}

h1 {
    font-size: 2.5rem;
    font-family: var(--font-display);
}

h2 {
    font-size: 2rem;
    font-family: var(--font-display);
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: var(--spacing-sm);
}

/* --------------------------------------------
   Navigation
   -------------------------------------------- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--nav-height);
    background-color: transparent;
    transition: all var(--transition-base);
}

.nav--scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
}

.nav__container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--max-width);
    height: 100%;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.nav__logo-img {
    height: 32px;
    width: auto;
}

.nav__toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-xs);
    z-index: 1001;
}

.nav__toggle-bar {
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    transition: all 0.25s ease;
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(2) {
    opacity: 0;
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.nav__menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    background-color: var(--color-bg);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.nav__menu--open {
    opacity: 1;
    visibility: visible;
}

.nav__link {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--color-text);
    padding: var(--spacing-xs);
    transition: color var(--transition-base);
}

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

.nav__link--cta {
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--color-primary);
    color: var(--color-bg);
    border-radius: 4px;
    transition: background-color var(--transition-base);
}

.nav__link--cta:hover {
    background-color: var(--color-primary-dark);
    color: var(--color-bg);
}

/* Desktop Navigation */
@media (min-width: 768px) {
    .nav__container {
        padding: 0 var(--spacing-md);
    }

    .nav__toggle {
        display: none;
    }

    .nav__menu {
        position: static;
        flex-direction: row;
        gap: var(--spacing-md);
        background-color: transparent;
        opacity: 1;
        visibility: visible;
    }

    .nav__link {
        font-size: 0.9375rem;
        position: relative;
    }

    .nav__link:not(.nav__link--cta)::after {
        content: '';
        position: absolute;
        bottom: -4px;
        left: 0;
        width: 0;
        height: 2px;
        background-color: var(--color-primary);
        transition: width var(--transition-base);
    }

    .nav__link:not(.nav__link--cta):hover::after {
        width: 100%;
    }
}

/* --------------------------------------------
   Hero Section
   -------------------------------------------- */
.hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    padding: calc(var(--nav-height) + var(--spacing-md)) var(--spacing-sm) var(--spacing-lg);
    background-color: var(--color-bg);
    position: relative;
}

.hero__container {
    max-width: var(--max-width);
    margin: 0 auto;
    width: 100%;
}

.hero__content {
    max-width: 640px;
}

.hero__title {
    margin-bottom: var(--spacing-sm);
}

.hero__title-line {
    display: block;
    font-size: 2.5rem;
    color: var(--color-text);
}

.hero__title-accent {
    display: block;
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-top: var(--spacing-xs);
}

.hero__subtitle {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
    max-width: 560px;
}

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

.hero__visual {
    display: none;
}

.hero__scroll {
    position: absolute;
    bottom: var(--spacing-md);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.hero__scroll-text {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-light);
}

.hero__scroll-line {
    width: 1px;
    height: 32px;
    background: linear-gradient(to bottom, var(--color-primary), transparent);
    animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
    0% {
        transform: scaleY(0);
        transform-origin: top;
    }
    50% {
        transform: scaleY(1);
        transform-origin: top;
    }
    50.1% {
        transform-origin: bottom;
    }
    100% {
        transform: scaleY(0);
        transform-origin: bottom;
    }
}

/* Desktop Hero */
@media (min-width: 768px) {
    .hero {
        padding: calc(var(--nav-height) + var(--spacing-lg)) var(--spacing-md) var(--spacing-xl);
    }

    .hero__container {
        justify-content: center;
        text-align: center;
    }

    .hero__content {
        max-width: 720px;
        margin: 0 auto;
    }

    .hero__title-line,
    .hero__title-accent {
        font-size: 3.5rem;
    }

    .hero__actions {
        justify-content: center;
    }

    /* Uncomment when hero visual is available */
    /*
    .hero__container {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-lg);
        align-items: center;
        text-align: left;
        justify-content: start;
    }

    .hero__content {
        margin: 0;
    }

    .hero__actions {
        justify-content: flex-start;
    }

    .hero__visual {
        display: flex;
        justify-content: center;
        align-items: center;
    }

    .hero__globe {
        width: 100%;
        max-width: 400px;
    }

    .hero__globe-img {
        width: 100%;
        animation: float 6s ease-in-out infinite;
    }
    */
}

@media (min-width: 1024px) {
    .hero__title-line,
    .hero__title-accent {
        font-size: 4rem;
    }

    .hero__subtitle {
        font-size: 1.25rem;
    }
}

@keyframes float {
    0%,
    100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-16px);
    }
}

/* --------------------------------------------
   Buttons
   -------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 1.75rem;
    font-size: 0.9375rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    border-radius: 4px;
    transition: all var(--transition-base);
    cursor: pointer;
}

.btn--primary {
    background-color: var(--color-primary);
    color: var(--color-bg);
    border: 2px solid var(--color-primary);
}

.btn--primary:hover {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.btn--secondary {
    background-color: transparent;
    color: var(--color-text);
    border: 2px solid var(--color-border);
}

.btn--secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* --------------------------------------------
   Section Header
   -------------------------------------------- */
.section-header {
    margin-bottom: var(--spacing-lg);
}

.section-header--center {
    text-align: center;
}

.section-header--light .section-header__label,
.section-header--light .section-header__title {
    color: var(--color-bg);
}

.section-header__label {
    display: block;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.section-header__title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 600;
}

@media (min-width: 768px) {
    .section-header__title {
        font-size: 2.5rem;
    }
}

/* --------------------------------------------
   Services Section
   -------------------------------------------- */
.services {
    padding: var(--spacing-lg) var(--spacing-sm);
    background-color: var(--color-bg);
}

.services__container {
    max-width: var(--max-width);
    margin: 0 auto;
}

.services__grid {
    display: grid;
    gap: var(--spacing-md);
}

.service-card {
    padding: var(--spacing-md);
    background-color: var(--color-bg-alt);
    border-radius: 8px;
    transition: transform var(--transition-base);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.service-card__icon {
    width: 56px;
    height: 56px;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.service-card__icon svg {
    width: 100%;
    height: 100%;
}

.service-card__title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

.service-card__description {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.service-card__list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.service-card__list li {
    position: relative;
    padding-left: 1.25rem;
    font-size: 0.9375rem;
    color: var(--color-text-light);
    line-height: 1.6;
}

.service-card__list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.6em;
    width: 6px;
    height: 6px;
    background-color: var(--color-primary);
    border-radius: 50%;
}

/* Desktop Services */
@media (min-width: 768px) {
    .services {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .services__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }

    .service-card {
        padding: var(--spacing-lg);
    }
}

/* --------------------------------------------
   Process Section
   -------------------------------------------- */
.process {
    padding: var(--spacing-lg) var(--spacing-sm);
    background-color: var(--color-bg-alt);
}

.process__container {
    max-width: var(--max-width);
    margin: 0 auto;
}

.process__steps {
    display: grid;
    gap: var(--spacing-md);
}

.process-step {
    text-align: center;
}

.process-step__number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
    background-color: var(--color-bg);
    border: 2px solid var(--color-primary);
    border-radius: 50%;
}

.process-step__title {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
}

.process-step__description {
    font-size: 0.9375rem;
    color: var(--color-text-light);
    line-height: 1.6;
}

/* Process Description */
.process__description {
    max-width: 800px;
    margin: var(--spacing-lg) auto 0;
    text-align: center;
}

.process__description p {
    font-size: 0.9375rem;
    color: var(--color-text-light);
    line-height: 1.7;
    margin: 0;
}

/* Desktop Process */
@media (min-width: 768px) {
    .process {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .process__steps {
        grid-template-columns: repeat(2, 1fr);
    }

    .process__description p {
        font-size: 1rem;
    }
}

@media (min-width: 1024px) {
    .process__steps {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--spacing-lg);
    }

    .process-step {
        position: relative;
    }

    .process-step::after {
        content: '';
        position: absolute;
        top: 28px;
        right: -50%;
        width: 100%;
        height: 2px;
        background: linear-gradient(to right, var(--color-primary) 0%, var(--color-border) 100%);
    }

    .process-step:last-child::after {
        display: none;
    }
}

/* --------------------------------------------
   Work Section
   -------------------------------------------- */
.work {
    padding: var(--spacing-lg) var(--spacing-sm);
    background-color: var(--color-bg);
}

.work__container {
    max-width: var(--max-width);
    margin: 0 auto;
}

.work__metrics {
    display: grid;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background-color: var(--color-bg-alt);
    border-radius: 8px;
}

.metric {
    text-align: center;
}

.metric__number {
    display: block;
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.metric__label {
    font-size: 0.875rem;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.work__map {
    margin-bottom: var(--spacing-lg);
}

.work__map-container {
    background-color: var(--color-bg-alt);
    border-radius: 8px;
    overflow: hidden;
    padding: var(--spacing-md);
}

.work__map-img {
    width: 100%;
    height: auto;
}

.work__showcase {
    margin-bottom: var(--spacing-lg);
}

.work__showcase-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.work__showcase-grid {
    display: grid;
    gap: var(--spacing-md);
}

.showcase-item {
    border-radius: 8px;
    overflow: hidden;
    background-color: var(--color-bg-alt);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.showcase-item__image {
    overflow: hidden;
}

.showcase-item__image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s ease;
}

.showcase-item:hover .showcase-item__image img {
    transform: scale(1.02);
}

.work__description {
    max-width: 800px;
    margin: var(--spacing-md) auto 0;
    text-align: center;
}

.work__description p {
    font-size: 0.9375rem;
    color: var(--color-text-light);
    line-height: 1.7;
    margin: 0;
}

/* Desktop Work */
@media (min-width: 768px) {
    .work {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .work__metrics {
        grid-template-columns: repeat(3, 1fr);
        padding: var(--spacing-lg);
    }

    .metric__number {
        font-size: 3rem;
    }

    .work__showcase-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }

    .work__clients-logos {
        gap: var(--spacing-lg);
    }
}

/* --------------------------------------------
   About Section
   -------------------------------------------- */
.about {
    padding: var(--spacing-lg) var(--spacing-sm);
    background-color: var(--color-bg-alt);
}

.about__container {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about__text {
    margin-bottom: 0;
}

.about__text p {
    font-size: 1rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* Desktop About */
@media (min-width: 768px) {
    .about {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .about__text p {
        font-size: 1.125rem;
    }
}

/* --------------------------------------------
   Contact Section
   -------------------------------------------- */
.contact {
    padding: var(--spacing-lg) var(--spacing-sm);
    background-color: var(--color-primary);
    color: var(--color-bg);
}

.contact__container {
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
}

.contact__intro {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-md);
}

.contact__actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    align-items: center;
}

.contact__link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    min-width: 280px;
    transition: background-color var(--transition-base);
}

.contact__link:hover {
    background-color: rgba(255, 255, 255, 0.15);
}

.contact__link-label {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.7);
}

.contact__link-value {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--color-bg);
}

.contact__link-icon {
    width: 20px;
    height: 20px;
    color: rgba(255, 255, 255, 0.7);
    margin-top: var(--spacing-xs);
}

.contact__link--linkedin {
    flex-direction: row;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
    justify-content: center;
}

.contact__link--linkedin .contact__link-label {
    width: 100%;
}

/* Desktop Contact */
@media (min-width: 768px) {
    .contact {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .contact__actions {
        flex-direction: row;
        justify-content: center;
    }

    .contact__link {
        min-width: 320px;
        padding: var(--spacing-md) var(--spacing-lg);
    }
}

/* --------------------------------------------
   Footer
   -------------------------------------------- */
.footer {
    padding: var(--spacing-md) var(--spacing-sm) var(--spacing-sm);
    background-color: #111827;
    color: var(--color-bg);
}

.footer__container {
    max-width: var(--max-width);
    margin: 0 auto;
}

.footer__brand {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.footer__logo {
    height: 28px;
    width: auto;
    margin: 0 auto var(--spacing-xs);
}

.footer__tagline {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
    margin: 0;
}

.footer__nav {
    margin-bottom: var(--spacing-md);
}

.footer__links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.footer__links a {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--transition-base);
}

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

.footer__bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding-top: var(--spacing-sm);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__copyright,
.footer__location {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.4);
    margin: 0;
}

/* Desktop Footer */
@media (min-width: 768px) {
    .footer {
        padding: var(--spacing-lg) var(--spacing-md) var(--spacing-md);
    }

    .footer__links {
        gap: var(--spacing-md);
    }

    .footer__bottom {
        flex-direction: row;
        justify-content: space-between;
    }
}

/* --------------------------------------------
   Accessibility & Utilities
   -------------------------------------------- */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

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

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -100%;
    left: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--color-primary);
    color: var(--color-bg);
    border-radius: 4px;
    z-index: 9999;
}

.skip-link:focus {
    top: var(--spacing-sm);
}

/* --------------------------------------------
   Font Display Optimization
   -------------------------------------------- */
@font-face {
    font-family: 'DM Sans';
    font-style: normal;
    font-weight: 400;
    font-display: swap;
}

@font-face {
    font-family: 'Playfair Display';
    font-style: normal;
    font-weight: 600;
    font-display: swap;
}