/* ==========================================================================
   CSS VARIABLES & RESET
   ========================================================================== */
:root {
    --bg-color: #f5f5f0;
    --text-primary: #121212;
    --text-secondary: #5a5a5a;
    --accent: #b8860b; 
    --surface: #ffffff;
    --surface-hover: #eaeaea;
    --border: #d4d4d4;
    --nav-bg: rgba(245, 245, 240, 0.85);
    
    --font-sans: 'Inter', sans-serif;
    --font-serif: 'Playfair Display', serif;
    
    --container-width: 1280px;
    --transition: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="dark"] {
    --bg-color: #0a0a0a;
    --text-primary: #f5f5f5;
    --text-secondary: #999999;
    --accent: #d4af37; 
    --surface: #141414;
    --surface-hover: #1f1f1f;
    --border: #2a2a2a;
    --nav-bg: rgba(10, 10, 10, 0.8);
}

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

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
    cursor: none;
    transition: background-color 0.4s ease, color 0.4s ease;
}

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

/* ==========================================================================
   CUSTOM CURSOR
   ========================================================================== */
.cursor-dot, .cursor-outline {
    position: fixed;
    top: 0;
    left: 0;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    z-index: 9999;
    pointer-events: none;
}

.cursor-dot {
    width: 6px;
    height: 6px;
    background-color: var(--accent);
}

.cursor-outline {
    width: 40px;
    height: 40px;
    border: 1px solid var(--text-secondary);
    transition: width 0.2s, height 0.2s, background-color 0.2s;
}

.cursor-outline.hover {
    width: 60px;
    height: 60px;
    background-color: var(--border);
    opacity: 0.5;
}

/* ==========================================================================
   LAYOUT & TYPOGRAPHY
   ========================================================================== */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 5vw;
}

.italic {
    font-family: var(--font-serif);
    font-style: italic;
    font-weight: 400;
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 400;
    margin-bottom: 4rem;
    line-height: 1.2;
}

.works-intro {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin-top: -2rem;
    margin-bottom: 4rem;
    line-height: 1.8;
}

/* ==========================================================================
   NAVIGATION
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 2rem 0;
    z-index: 100;
    transition: padding var(--transition), background-color var(--transition);
}

.navbar.scrolled {
    padding: 1rem 0;
    background-color: var(--nav-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}

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

.logo {
    font-family: var(--font-sans);
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.logo span {
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--text-primary);
    transition: width var(--transition);
}

.nav-link:hover::after {
    width: 100%;
}

.lang-switch {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-left: 2rem;
}

.lang-switch a {
    transition: color 0.3s;
}

.lang-switch a:hover, .lang-switch a.active {
    color: var(--text-primary);
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: none;
    margin-left: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.3s, transform 0.3s;
}

.theme-toggle:hover {
    color: var(--accent);
    transform: rotate(15deg);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 5rem;
}

.hero-subtitle {
    font-size: clamp(0.9rem, 2vw, 1.1rem);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.hero-title {
    font-size: clamp(3.5rem, 8vw, 7.5rem);
    font-weight: 500;
    line-height: 1.05;
    letter-spacing: -0.02em;
}

.hero-scroll {
    position: absolute;
    bottom: 3rem;
    left: 5vw;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
}

.scroll-text {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    writing-mode: vertical-rl;
    transform: rotate(180deg);
}

.scroll-line {
    width: 1px;
    height: 60px;
    background-color: var(--border);
    position: relative;
    overflow: hidden;
    margin-left: 6px;
}

.scroll-line::after {
    content: '';
    position: absolute;
    top: -100%;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--text-primary);
    animation: scrollLine 2s infinite cubic-bezier(0.645, 0.045, 0.355, 1);
}

@keyframes scrollLine {
    0% { top: -100%; }
    50% { top: 0%; }
    100% { top: 100%; }
}

/* ==========================================================================
   SELECTED WORKS
   ========================================================================== */
.works {
    padding: 8rem 0;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 4rem;
}

.project-card:nth-child(even) {
    margin-top: 8rem;
}

.project-image-wrapper {
    width: 100%;
    overflow: hidden;
    margin-bottom: 2rem;
    background-color: var(--surface);
    position: relative;
    border: 1px solid var(--border);
}

.project-img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.project-category {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    display: block;
    margin-bottom: 0.5rem;
}

.project-title {
    font-size: 2rem;
    font-weight: 500;
    margin-bottom: 1rem;
}

.project-desc {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
}

@media (max-width: 768px) {
    .projects-grid {
        grid-template-columns: 1fr;
        gap: 4rem;
    }
    .project-card:nth-child(even) {
        margin-top: 0;
    }
    .project-image-wrapper {
        /* aspect-ratio removed for mobile as well */
    }
}

/* ==========================================================================
   ABOUT SECTION
   ========================================================================== */
.about {
    padding: 8rem 0;
    background-color: var(--surface);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.about-container {
    display: flex;
    justify-content: flex-end;
}

.about-content {
    max-width: 800px;
}

.about-text {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    line-height: 1.5;
    margin-bottom: 2rem;
    color: var(--text-secondary);
}

.about-text strong {
    color: var(--text-primary);
    font-weight: 500;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 3rem;
}

.tech-item {
    padding: 0.6rem 1.2rem;
    border: 1px solid var(--border);
    border-radius: 40px;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    transition: all 0.3s;
}

.tech-item:hover {
    border-color: var(--text-primary);
    color: var(--text-primary);
}

/* ==========================================================================
   CONTACT FORM
   ========================================================================== */
.form-wrapper {
    margin: 6rem 0 8rem;
    max-width: 900px;
}

.bespoke-form {
    display: flex;
    flex-direction: column;
    gap: 4rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.form-group {
    position: relative;
    width: 100%;
}

.form-group input,
.form-group textarea {
    width: 100%;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
    font-size: 1.5rem;
    font-family: var(--font-sans);
    color: var(--text-primary);
    transition: border-color 0.3s;
    resize: none;
    border-radius: 0;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-bottom-color: var(--text-primary);
}

.form-group label {
    position: absolute;
    top: 1rem;
    left: 0;
    font-size: 1.5rem;
    color: var(--text-secondary);
    pointer-events: none;
    transition: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.form-group input:focus ~ label,
.form-group input:not(:placeholder-shown) ~ label,
.form-group textarea:focus ~ label,
.form-group textarea:not(:placeholder-shown) ~ label {
    top: -1.5rem;
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent);
}

.form-submit-btn {
    align-self: flex-start;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 2.5rem;
    font-family: var(--font-serif);
    font-style: italic;
    cursor: none;
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.form-submit-btn:hover {
    color: var(--accent);
    gap: 2rem;
}

.form-submit-btn .btn-icon {
    font-style: normal;
    font-size: 2rem;
    transition: transform 0.4s;
}

.form-submit-btn:hover .btn-icon {
    transform: translate(5px, 5px);
}

/* ==========================================================================
   TOAST NOTIFICATION
   ========================================================================== */
.toast-notification {
    position: fixed;
    bottom: -100px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--surface);
    border: 1px solid var(--border);
    padding: 1.2rem 2.5rem;
    border-radius: 50px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.15);
    z-index: 9999;
    opacity: 0;
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    pointer-events: none;
}

.toast-notification.show {
    bottom: 3rem;
    opacity: 1;
}

.toast-content {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.toast-icon {
    font-size: 1.2rem;
    font-weight: bold;
}

.toast-notification.success .toast-icon {
    color: var(--accent);
}

.toast-notification.error .toast-icon {
    color: #ff4444;
}

.toast-message {
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 500;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
    padding: 8rem 0 3rem;
}

.footer-cta {
    margin-bottom: 8rem;
}

.footer-cta h2 {
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 500;
    line-height: 1.1;
    margin-bottom: 3rem;
}

.btn-primary {
    display: inline-block;
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 300;
    border-bottom: 1px solid var(--text-primary);
    padding-bottom: 5px;
    transition: color 0.3s, border-color 0.3s;
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.social-links {
    display: flex;
    gap: 2rem;
}

.social-links a {
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.85rem;
    transition: color 0.3s;
}

.social-links a:hover {
    color: var(--text-primary);
}

@media (max-width: 600px) {
    .footer-bottom {
        flex-direction: column;
        gap: 1.5rem;
        align-items: flex-start;
    }
    .form-row {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    .form-group input,
    .form-group textarea,
    .form-group label {
        font-size: 1.2rem;
    }
    .form-submit-btn {
        font-size: 2rem;
    }
}

/* ==========================================================================
   ANIMATIONS (REVEAL)
   ========================================================================== */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.reveal-text {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-text.active {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   MOBILE RESPONSIVENESS & MENU
   ========================================================================== */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 101;
}

.mobile-menu-btn .bar {
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: transform 0.3s ease, background-color 0.3s ease;
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100vw;
        height: 100vh;
        background-color: var(--bg-color);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 3rem;
        transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1);
        z-index: 100;
    }

    .nav-links.active {
        right: 0;
    }

    .nav-link {
        font-size: 1.5rem;
    }

    .lang-switch {
        margin-left: 0;
        font-size: 1.2rem;
    }

    .theme-toggle {
        margin-left: 0;
        font-size: 1.8rem;
    }

    .mobile-menu-btn.open .bar:nth-child(1) {
        transform: translateY(4px) rotate(45deg);
    }
    
    .mobile-menu-btn.open .bar:nth-child(2) {
        transform: translateY(-4px) rotate(-45deg);
    }

    .hero-scroll {
        display: none;
    }
}

/* ==========================================================================
   SERVICE SELECTION (Contact Form)
   ========================================================================== */
.service-selection {
    margin-bottom: 3rem;
}
.service-selection h3 {
    font-size: 1.2rem;
    font-weight: 300;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}
.service-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}
.service-pill {
    position: relative;
    cursor: pointer;
}
.service-pill input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}
.service-pill .pill-text {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border: 1px solid var(--border);
    border-radius: 40px;
    font-size: 0.95rem;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    user-select: none;
}
.service-pill:hover .pill-text {
    border-color: var(--text-primary);
}
.service-pill input[type="checkbox"]:checked ~ .pill-text {
    background-color: var(--text-primary);
    color: var(--background);
    border-color: var(--text-primary);
}

/* ==========================================================================
   FEATURED CASE STUDY (SMO.KIRKYAMA.UK)
   ========================================================================== */
.case-study {
    margin-top: 8rem;
    padding-top: 5rem;
    border-top: 1px solid var(--border);
}

.case-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 4rem;
}

.case-title {
    font-size: clamp(2rem, 4vw, 3.2rem);
    font-weight: 500;
    line-height: 1.15;
    margin-top: 0.5rem;
}

.case-link {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 1.1rem;
    color: var(--text-primary);
    border-bottom: 1px solid var(--text-primary);
    padding-bottom: 4px;
    transition: color 0.3s, border-color 0.3s;
}

.case-link:hover {
    color: var(--accent);
    border-color: var(--accent);
}

.case-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 5rem;
    align-items: start;
}

.case-narrative p {
    font-size: 1.15rem;
    line-height: 1.75;
    color: var(--text-secondary);
    margin-bottom: 1.8rem;
}

.case-narrative p strong {
    color: var(--text-primary);
    font-weight: 500;
}

.case-principles {
    display: flex;
    flex-direction: column;
    gap: 2.2rem;
    border-left: 1px solid var(--border);
    padding-left: 3rem;
}

.principle-item h4 {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: baseline;
    gap: 0.8rem;
}

.principle-num {
    font-family: var(--font-serif);
    font-style: italic;
    color: var(--accent);
    font-size: 1.05rem;
}

.principle-item p {
    font-size: 0.95rem;
    line-height: 1.65;
    color: var(--text-secondary);
}

@media (max-width: 900px) {
    .case-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    .case-principles {
        border-left: none;
        padding-left: 0;
        border-top: 1px solid var(--border);
        padding-top: 2.5rem;
    }
}