/* ClearCode Consultancy - Design System
   Based on brand guidelines from design-prompts.md
   ================================================ */

/* CSS Custom Properties (Design Tokens) */
:root {
    /* Colors */
    --color-black: #000000;
    --color-cyan: #00BFFF;
    --color-white: #FFFFFF;
    --color-offwhite: #F8F6F3;
    --color-gray: #595959; /* Darker for WCAG AA contrast on off-white */
    --color-lightgray: #E5E5E5;
    --color-darkgray: #333333;

    /* Typography */
    --font-stack: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Layout */
    --max-width: 1200px;
    --side-padding: 80px;
    --nav-height: 72px;
}

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

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

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

/* Skip link for keyboard navigation */
.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--color-black);
    color: var(--color-white);
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: 9999;
    text-decoration: none;
}

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

/* Global focus styles - visible for keyboard users */
:focus-visible {
    outline: 3px solid var(--color-cyan);
    outline-offset: 2px;
}

/* Remove outline only for mouse users */
:focus:not(:focus-visible) {
    outline: none;
}

body {
    font-family: var(--font-stack);
    line-height: var(--line-height-base);
    color: var(--color-black);
    background-color: var(--color-offwhite);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 600;
}

h3 {
    font-size: clamp(1.25rem, 2vw, 1.5rem);
    font-weight: 600;
}

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

p.lead {
    font-size: 1.25rem;
    line-height: 1.7;
}

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

/* Utility Classes */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--side-padding);
}

.text-cyan {
    color: var(--color-cyan);
}

.bg-black {
    background-color: var(--color-black);
    color: var(--color-white);
}

.bg-white {
    background-color: var(--color-white);
}

/* =====================
   Navigation
   ===================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-lightgray);
    z-index: 1000;
    display: flex;
    align-items: center;
}

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

.nav__logo {
    height: 56px;
    width: auto;
}

.nav__logo img {
    height: 100%;
    width: auto;
}

.nav__links {
    display: flex;
    gap: var(--spacing-lg);
    list-style: none;
}

.nav__link {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-black);
    transition: color 0.2s ease;
    position: relative;
}

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

.nav__link--active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-cyan);
}

/* Mobile menu toggle */
.nav__toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.nav__toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-black);
    margin: 5px 0;
    transition: all 0.3s ease;
}

/* =====================
   Hero Section
   ===================== */
.hero {
    min-height: 100vh;
    padding-top: var(--nav-height);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background-color: var(--color-offwhite);
}

.hero__background {
    position: absolute;
    top: 0;
    right: 0;
    width: 70%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.hero__background img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: left center;
}

/* Gradient overlay to fade image into background on left side */
.hero__background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 40%;
    height: 100%;
    background: linear-gradient(to right, var(--color-offwhite) 0%, var(--color-offwhite) 30%, transparent 100%);
    z-index: 1;
}

.hero__inner {
    display: flex;
    align-items: center;
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--side-padding);
    position: relative;
    z-index: 1;
}

.hero__content {
    max-width: 480px;
    z-index: 1;
    background-color: var(--color-offwhite);
    padding: var(--spacing-xl) var(--spacing-xl) var(--spacing-xl) 0;
}

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

.hero__title span {
    display: block;
}

.hero__subtitle {
    font-size: 1.125rem;
    color: var(--color-gray);
    max-width: 480px;
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

/* Legacy hero image (for backwards compatibility) */
.hero__image {
    position: relative;
    height: 70vh;
    max-height: 600px;
}

.hero__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

/* =====================
   Buttons
   ===================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: inherit;
    font-size: 0.9375rem;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    /* Sharp corners - no border-radius per brand guidelines */
}

.btn--primary {
    background-color: var(--color-black);
    color: var(--color-white);
}

.btn--primary:hover {
    background-color: var(--color-darkgray);
}

.btn--cyan {
    background-color: var(--color-cyan);
    color: var(--color-black);
    font-weight: 600;
}

.btn--cyan:hover {
    filter: brightness(1.1);
}

/* Primary button with cyan style (matching mockup) */
.btn--cta {
    background-color: var(--color-cyan);
    color: var(--color-black);
    font-weight: 600;
    padding: var(--spacing-md) var(--spacing-xl);
}

.btn--cta:hover {
    filter: brightness(0.95);
}

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

.btn--outline:hover {
    background-color: var(--color-black);
    color: var(--color-white);
}

/* =====================
   Sections
   ===================== */
.section {
    padding: var(--spacing-3xl) 0;
}

.section--gray {
    background-color: #F5F5F5;
}

.section__header {
    margin-bottom: var(--spacing-2xl);
}

.section__title {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-md);
}

.section__title::after {
    content: '';
    display: block;
    width: 200px;
    height: 3px;
    background-color: var(--color-black);
}

/* =====================
   Service Cards
   ===================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.service-card {
    background-color: var(--color-black);
    color: var(--color-white);
    padding: var(--spacing-lg);
    /* Sharp corners per brand guidelines */
}

.service-card__accent {
    width: 40px;
    height: 2px;
    margin-bottom: var(--spacing-md);
}

.service-card__accent--cyan {
    background-color: var(--color-cyan);
}

.service-card__accent--white {
    background-color: var(--color-white);
}

.service-card__title {
    color: var(--color-white);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.service-card__text {
    color: #999999;
    font-size: 0.9375rem;
    line-height: 1.6;
}

.service-card__list {
    list-style: none;
    margin-top: var(--spacing-sm);
}

.service-card__list li {
    color: #999999;
    font-size: 0.875rem;
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--color-darkgray);
}

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

/* =====================
   Stats Bar
   ===================== */
.stats {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--color-lightgray);
    border-bottom: 1px solid var(--color-lightgray);
}

.stat {
    text-align: center;
    padding: 0 var(--spacing-lg);
}

.stat:not(:last-child) {
    border-right: 2px solid var(--color-cyan);
}

.stat__number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-black);
    display: block;
}

.stat__label {
    font-size: 0.875rem;
    color: var(--color-gray);
    margin-top: var(--spacing-xs);
}

/* =====================
   About / Content Sections
   ===================== */
.content-grid {
    display: grid;
    grid-template-columns: 35% 1fr;
    gap: var(--spacing-2xl);
}

.content-grid__sidebar {
    position: relative;
}

.content-grid__main {
    max-width: 640px;
}

.big-number {
    font-size: clamp(6rem, 15vw, 12rem);
    font-weight: 100;
    line-height: 0.85;
    color: var(--color-black);
}

.big-number__label {
    font-size: 1.125rem;
    color: var(--color-gray);
    margin-top: var(--spacing-sm);
}

/* Pull quote */
.pull-quote {
    border-left: 4px solid var(--color-cyan);
    padding-left: var(--spacing-md);
    margin: var(--spacing-lg) 0;
    font-size: 1.125rem;
    font-style: italic;
    color: var(--color-black);
}

/* =====================
   Values Section
   ===================== */
.values {
    text-align: center;
    padding: var(--spacing-3xl) 0;
}

.values__statement {
    max-width: 800px;
    margin: 0 auto var(--spacing-2xl);
}

.values__small {
    font-size: 1.25rem;
    color: var(--color-gray);
    display: block;
    margin-bottom: var(--spacing-xs);
}

.values__big {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    color: var(--color-black);
    position: relative;
    display: inline-block;
}

.values__principles {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2xl);
    flex-wrap: wrap;
}

.values__principle {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-gray);
}

.values__principle::before {
    content: '';
    width: 8px;
    height: 8px;
    background-color: var(--color-cyan);
}

/* =====================
   Contact Section
   ===================== */
.contact-grid {
    display: grid;
    grid-template-columns: 45% 1fr;
    gap: var(--spacing-2xl);
}

.contact__info h2 {
    margin-bottom: var(--spacing-md);
}

.contact__email {
    display: inline-flex;
    align-items: center;
    background-color: var(--color-black);
    color: var(--color-white);
    padding: var(--spacing-sm) var(--spacing-md);
    margin: var(--spacing-lg) 0;
    font-size: 0.9375rem;
}

.contact__email:hover {
    background-color: var(--color-darkgray);
}

.contact__note {
    font-size: 0.875rem;
    color: var(--color-gray);
}

/* Contact Form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

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

.form-group label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-black);
}

.form-group input,
.form-group textarea {
    font-family: inherit;
    font-size: 1rem;
    padding: var(--spacing-sm);
    border: none;
    border-bottom: 2px solid var(--color-black);
    background-color: transparent;
    transition: border-color 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--color-cyan);
    box-shadow: 0 0 0 3px rgba(0, 191, 255, 0.2);
}

.form-group textarea {
    border: 2px solid var(--color-black);
    min-height: 120px;
    resize: vertical;
}

.form-group textarea:focus {
    border-color: var(--color-cyan);
}

/* =====================
   Footer
   ===================== */
.footer {
    background-color: var(--color-black);
    color: var(--color-white);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer__inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer__brand img {
    height: 32px;
    margin-bottom: var(--spacing-sm);
}

.footer__tagline {
    color: #888888;
    font-size: 0.875rem;
    max-width: 280px;
}

.footer__heading {
    color: var(--color-cyan);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-md);
}

.footer__links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.footer__link {
    color: var(--color-white);
    font-size: 0.9375rem;
    transition: color 0.2s ease;
}

.footer__link:hover {
    color: var(--color-cyan);
}

.footer__bottom {
    display: flex;
    justify-content: space-between;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-darkgray);
    font-size: 0.8125rem;
    color: #888888;
}

/* =====================
   Page Header (for inner pages)
   ===================== */
.page-header {
    padding: calc(var(--nav-height) + var(--spacing-3xl)) 0 var(--spacing-2xl);
    background-color: var(--color-white);
}

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

.page-header__subtitle {
    font-size: 1.125rem;
    color: var(--color-gray);
    max-width: 600px;
}

/* =====================
   Approach Page Specific
   ===================== */
.approach-item {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--spacing-xl);
    padding: var(--spacing-xl) 0;
    border-bottom: 1px solid var(--color-lightgray);
}

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

.approach-item__number {
    font-size: 3rem;
    font-weight: 100;
    color: var(--color-lightgray);
}

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

.approach-item__text {
    color: var(--color-gray);
}

/* =====================
   Differentiators
   ===================== */
.differentiators {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.differentiator {
    padding: var(--spacing-lg);
    border: 1px solid var(--color-lightgray);
    background-color: var(--color-white);
}

.differentiator__icon {
    width: 24px;
    height: 24px;
    background-color: var(--color-cyan);
    margin-bottom: var(--spacing-md);
}

.differentiator__title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.differentiator__text {
    font-size: 0.9375rem;
    color: var(--color-gray);
}

/* =====================
   Client List
   ===================== */
.clients {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.client-tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--color-lightgray);
    font-size: 0.875rem;
    color: var(--color-gray);
}

/* =====================
   Responsive Design
   ===================== */
@media (max-width: 1024px) {
    :root {
        --side-padding: 40px;
    }

    .hero__background {
        width: 60%;
        opacity: 0.7;
    }

    .hero__content {
        max-width: 420px;
    }

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

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

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

@media (max-width: 768px) {
    :root {
        --side-padding: 24px;
        --nav-height: 60px;
    }

    /* Mobile Navigation */
    .nav__logo {
        height: 40px;
    }

    .nav__links {
        display: none;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background-color: var(--color-white);
        flex-direction: column;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--color-lightgray);
        gap: var(--spacing-sm);
    }

    .nav__links--open {
        display: flex;
    }

    .nav__toggle {
        display: block;
    }

    /* Hero adjustments */
    .hero {
        min-height: auto;
        padding: calc(var(--nav-height) + var(--spacing-2xl)) 0 var(--spacing-2xl);
    }

    .hero__background {
        display: none;
    }

    .hero__content {
        background: none;
        padding: 0;
        max-width: 100%;
    }

    /* Services grid */
    .services-grid {
        grid-template-columns: 1fr;
    }

    /* Stats */
    .stats {
        flex-direction: column;
        gap: var(--spacing-lg);
    }

    .stat:not(:last-child) {
        border-right: none;
        border-bottom: 2px solid var(--color-cyan);
        padding-bottom: var(--spacing-lg);
    }

    /* Approach items */
    .approach-item {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .approach-item__number {
        font-size: 2rem;
    }

    /* Differentiators */
    .differentiators {
        grid-template-columns: 1fr;
    }

    /* Footer */
    .footer__inner {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .footer__bottom {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }

    /* Values */
    .values__principles {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2rem;
    }

    .big-number {
        font-size: 5rem;
    }

    .btn {
        width: 100%;
    }
}