/* =========================================================================
   VARIABLES & DESIGN SYSTEM
   ========================================================================= */
:root {
    /* Color Palette */
    --color-bg: #EAEAEA;
    --color-bg-alt: #F4F4F4;
    --color-text: #111111;
    --color-text-mutated: #555555;
    --color-border: #D1D1D1;
    --color-white: #FFFFFF;
    
    /* Typography */
    --font-heading: 'Syne', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Spacing */
    --space-xs: 0.5rem;   /* 8px */
    --space-sm: 1rem;     /* 16px */
    --space-md: 2rem;     /* 32px */
    --space-lg: 4rem;     /* 64px */
    --space-xl: 8rem;     /* 128px */
    --space-xxl: 12rem;   /* 192px */

    /* Fluid Typography (Clamp) */
    --text-h1: clamp(3rem, 8vw, 8rem);
    --text-h2: clamp(2.5rem, 5vw, 5rem);
    --text-h3: clamp(1.5rem, 3vw, 2.5rem);
    --text-body: 1.125rem;
    --text-small: 0.875rem;

    /* Metrics */
    --container-width: 1400px;
    --transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Dark Mode Override (optional if we want to default to dark or toggle it)
   For now, we stick to white/grey background with bold black text. */
@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #0D0D0D;
        --color-bg-alt: #161616;
        --color-text: #F2F2F2;
        --color-text-mutated: #A1A1A1;
        --color-border: #333333;
    }
}

/* =========================================================================
   RESET & BASE
   ========================================================================= */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    font-size: var(--text-body);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.1;
    text-transform: uppercase;
    letter-spacing: -0.02em;
}

img, picture, video, canvas, svg {
    display: block;
    max-width: 100%;
    height: auto;
}

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

ul, ol {
    list-style: none;
}

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

/* =========================================================================
   UTILITIES
   ========================================================================= */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.section {
    padding-top: var(--space-xl);
    padding-bottom: var(--space-xl);
}

/* =========================================================================
   HEADER & NAVIGATION
   ========================================================================= */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: var(--space-md) 0;
    z-index: 100;
    transition: var(--transition);
    /* Inverted mix-blend-mode looks amazing on scrolling over images */
    mix-blend-mode: difference;
    color: #fff; /* Always white inside mix-blend-mode so it inverts */
}

.header--scrolled {
    padding: var(--space-sm) 0;
    background: transparent;
}

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

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 2px;
}

.nav__list {
    display: flex;
    gap: var(--space-md);
}

.nav__link {
    font-size: var(--text-small);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    position: relative;
    padding: 0.5rem 0;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0%;
    height: 1px;
    background-color: currentColor;
    transition: var(--transition);
}

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

/* =========================================================================
   HERO SECTION
   ========================================================================= */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero__image-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    /* initial scale down for animation later */
    transform: scale(1.05);
}

.hero__image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0,0,0,0.1) 0%, rgba(0,0,0,0.6) 100%);
    z-index: 2;
}

.hero__content-container {
    position: relative;
    z-index: 10;
    height: 100%;
    display: flex;
    align-items: flex-end;
    padding-bottom: var(--space-xl);
}

.hero__content {
    color: var(--color-white);
    max-width: 900px;
}

.hero__title {
    font-size: var(--text-h1);
    margin-bottom: var(--space-md);
    display: flex;
    flex-direction: column;
}

.reveal-text {
    line-height: 0.95;
    overflow: hidden;
}

.hero__slogan {
    font-size: clamp(1.125rem, 2vw, 1.5rem);
    max-width: 600px;
    opacity: 0.9;
    font-weight: 300;
}

/* =========================================================================
   SECTION HEADERS
   ========================================================================= */
.section__header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    border-bottom: 2px solid var(--color-border);
    padding-bottom: var(--space-sm);
    margin-bottom: var(--space-xl);
}

.section__title {
    font-size: var(--text-h2);
}

.section__subtitle {
    font-size: var(--text-body);
    font-weight: 500;
    color: var(--color-text-mutated);
}

/* =========================================================================
   PORTFOLIO SECTION
   ========================================================================= */
.portfolio__grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--space-lg) var(--space-md);
}

.project-card {
    grid-column: span 6;
}

/* Offset for alternating rhythm */
.project-card--offset {
    margin-top: var(--space-xl);
}

@media (max-width: 900px) {
    .project-card {
        grid-column: span 12;
    }
    .project-card--offset {
        margin-top: 0;
    }
}

.project-card__link {
    display: block;
    cursor: none; /* custom cursor maybe? */
}

.project-card__image-wrapper {
    overflow: hidden;
    margin-bottom: var(--space-md);
    aspect-ratio: 4/5;
    background-color: var(--color-bg-alt);
}

.project-card__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.project-card:hover .project-card__image {
    transform: scale(1.05);
}

.project-card__title {
    font-size: var(--text-h3);
    margin-bottom: var(--space-xs);
}

.project-card__category {
    color: var(--color-text-mutated);
    font-size: var(--text-small);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* =========================================================================
   ABOUT SECTION
   ========================================================================= */
.about__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: center;
}

@media (max-width: 900px) {
    .about__content {
        grid-template-columns: 1fr;
    }
}

.about__headline {
    font-size: var(--text-h3);
    margin-bottom: var(--space-md);
    line-height: 1.2;
}

.about__description {
    color: var(--color-text-mutated);
    margin-bottom: var(--space-lg);
    font-size: 1.125rem;
}

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

.fact__number {
    display: block;
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 4vw, 4rem);
    font-weight: 800;
    line-height: 1;
    margin-bottom: var(--space-xs);
}

.fact__label {
    font-size: var(--text-small);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-mutated);
}

.about__image-wrapper {
    aspect-ratio: 3/4;
    overflow: hidden;
    background-color: var(--color-bg-alt);
}

.about__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* =========================================================================
   SERVICES SECTION
   ========================================================================= */
.services__list {
    border-top: 1px solid var(--color-border);
}

.services__item {
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--color-border);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    align-items: center;
    transition: var(--transition);
}

.services__item:hover {
    padding-left: var(--space-md);
    background-color: var(--color-bg-alt);
}

@media (max-width: 768px) {
    .services__item {
        grid-template-columns: 1fr;
        gap: var(--space-xs);
    }
}

.services__name {
    font-size: clamp(1.25rem, 2.5vw, 2rem);
}

.services__desc {
    color: var(--color-text-mutated);
    font-size: 1.125rem;
}

/* =========================================================================
   CONTACT SECTION
   ========================================================================= */
.contact__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
}

@media (max-width: 900px) {
    .contact__inner {
        grid-template-columns: 1fr;
    }
}

.contact__title {
    font-size: clamp(3rem, 6vw, 6rem);
    line-height: 0.95;
    margin-bottom: var(--space-lg);
}

.contact__details {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.contact__link {
    font-size: 1.25rem;
    font-weight: 500;
}

.contact__link:hover {
    color: var(--color-text-mutated);
}

.socials {
    display: flex;
    gap: var(--space-md);
}

.socials__link {
    font-size: var(--text-small);
    text-transform: uppercase;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-decoration: underline;
}

.socials__link:hover {
    color: var(--color-text-mutated);
}

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

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

.form-label {
    font-size: var(--text-small);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

.form-input, .form-textarea {
    width: 100%;
    padding: 1rem 0;
    border: none;
    border-bottom: 2px solid var(--color-border);
    background: transparent;
    color: var(--color-text);
    outline: none;
    transition: var(--transition);
}

.form-input:focus, .form-textarea:focus {
    border-bottom-color: var(--color-text);
}

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

.btn {
    display: inline-block;
    padding: 1.25rem 2.5rem;
    cursor: pointer;
    font-family: var(--font-body);
    font-size: var(--text-body);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: none;
    background-color: var(--color-text);
    color: var(--color-bg);
    transition: var(--transition);
}

.btn:hover {
    background-color: var(--color-text-mutated);
    transform: translateY(-4px);
}

/* =========================================================================
   FOOTER
   ========================================================================= */
.footer {
    padding: var(--space-md) 0;
    border-top: 1px solid var(--color-border);
    margin-top: var(--space-xl);
}

.footer__inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer__copy {
    color: var(--color-text-mutated);
    font-size: var(--text-small);
}

.scroll-top {
    font-size: var(--text-small);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 500;
}

.scroll-top:hover {
    color: var(--color-text-mutated);
}

/* =========================================================================
   ANIMATIONS
   ========================================================================= */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-up.is-visible {
    opacity: 1;
    transform: translateY(0);
}