/* ========================================
   1. DESIGN SYSTEM & RESET
======================================== */

:root {
    --color-bg: #f8f7f4;
    --color-surface: #ffffff;
    --color-text: #292c28;
    --color-muted: #777a72;
    --color-accent: #788675;
    --color-accent-dark: #5e6b5b;
    --color-accent-light: #e9ede6;
    --color-border: #e7e5df;

    --font-heading: "Manrope", sans-serif;
    --font-body: "DM Sans", sans-serif;

    --container-width: 1160px;
    --section-spacing: clamp(64px, 9vw, 120px);

    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;

    --shadow-soft: 0 12px 40px rgba(41, 44, 40, 0.06);
    --transition: 220ms ease;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 90px;
}

body {
    margin: 0;
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}

body,
button,
a {
    font-family: var(--font-body);
}

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

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

button {
    color: inherit;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 5px;
}

ul {
    padding: 0;
    margin: 0;
    list-style: none;
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

h1,
h2,
h3 {
    font-family: var(--font-heading);
    line-height: 1.2;
    letter-spacing: -0.045em;
}

h2 {
    font-size: clamp(30px, 4vw, 44px);
    font-weight: 600;
}

h3 {
    font-size: 20px;
    font-weight: 600;
}

::selection {
    color: var(--color-text);
    background: #dce5d6;
}


/* ========================================
   2. HEADER & NAVIGATION
======================================== */

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(248, 247, 244, 0.92);
    border-bottom: 1px solid rgba(231, 229, 223, 0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.header__container {
    width: min(var(--container-width), calc(100% - 64px));
    min-height: 84px;
    margin-inline: auto;

    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

.site-logo {
    font-family: var(--font-heading);
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -0.08em;
}

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

.nav__list {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav__link {
    position: relative;
    display: inline-block;
    padding: 8px 0;

    color: var(--color-muted);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.025em;

    transition: color var(--transition);
}

.nav__link::after {
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;

    height: 2px;
    content: "";
    background: var(--color-accent);

    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

.nav__link:hover,
.nav__link--active {
    color: var(--color-text);
}

.nav__link:hover::after,
.nav__link--active::after {
    transform: scaleX(1);
}

/* Mobile navigation button */

.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    padding: 10px;

    align-items: center;
    justify-content: center;

    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.hamburger,
.hamburger::before,
.hamburger::after {
    display: block;
    width: 19px;
    height: 2px;

    background: var(--color-text);
    border-radius: 2px;
    transition: transform var(--transition);
}

.hamburger {
    position: relative;
}

.hamburger::before,
.hamburger::after {
    position: absolute;
    left: 0;
    content: "";
}

.hamburger::before {
    top: -6px;
}

.hamburger::after {
    top: 6px;
}


/* ========================================
   3. PROJECT HERO
======================================== */

.project-hero {
    width: min(var(--container-width), calc(100% - 64px));
    margin-inline: auto;
    padding-block: clamp(56px, 8vw, 100px);

    display: grid;
    grid-template-columns: 0.95fr 1.05fr;
    align-items: center;
    gap: clamp(40px, 7vw, 90px);
}

.project-hero__content {
    min-width: 0;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;

    margin-bottom: 46px;

    color: var(--color-muted);
    font-size: 13px;
    font-weight: 500;

    transition: color var(--transition);
}

.back-link:hover {
    color: var(--color-accent-dark);
}

.back-link i {
    font-size: 12px;
    transition: transform var(--transition);
}

.back-link:hover i {
    transform: translateX(-4px);
}

.project-eyebrow,
.section-eyebrow {
    margin-bottom: 20px;

    color: var(--color-accent-dark);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.17em;
    line-height: 1.6;
    text-transform: uppercase;
}

.project-title {
    margin-bottom: 24px;

    font-size: clamp(48px, 6.5vw, 78px);
    font-weight: 700;
    letter-spacing: -0.075em;
    line-height: 1.03;
}

.project-title span {
    display: block;
    color: var(--color-accent);
}

.project-subtitle {
    max-width: 470px;
    margin-bottom: 28px;

    color: var(--color-muted);
    font-size: clamp(16px, 1.8vw, 18px);
    line-height: 1.85;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 9px;
    margin-bottom: 34px;
}

.project-tags span {
    padding: 7px 12px;

    color: #555c52;
    background: var(--color-accent-light);
    border: 1px solid #dfe5da;
    border-radius: 5px;

    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.025em;
}

.project-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.project-button {
    min-height: 50px;
    padding: 13px 20px;

    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;

    border: 1px solid transparent;
    border-radius: var(--radius-sm);

    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.015em;

    transition:
        background var(--transition),
        color var(--transition),
        border-color var(--transition),
        transform var(--transition);
}

.project-button:hover {
    transform: translateY(-2px);
}

.project-button--primary {
    color: #ffffff;
    background: var(--color-text);
}

.project-button--primary:hover {
    background: var(--color-accent-dark);
}

.project-button--secondary {
    color: var(--color-text);
    background: transparent;
    border-color: #d9d7d0;
}

.project-button--secondary:hover {
    background: var(--color-surface);
    border-color: var(--color-accent);
}

.project-button i {
    font-size: 14px;
}


/* ========================================
   4. PROJECT PREVIEW IMAGE
======================================== */

.project-hero__image {
    position: relative;
    min-width: 0;
    padding: 18px;

    background: #eeece6;
    border: 1px solid #e5e2da;
    border-radius: var(--radius-lg);
}

.project-hero__image::before {
    position: absolute;
    top: -15px;
    right: -15px;
    z-index: -1;

    width: 42%;
    height: 42%;

    content: "";
    background: #e5e9df;
    border-radius: var(--radius-lg);
}

.project-preview {
    width: 100%;
    aspect-ratio: 4 / 3;

    object-fit: cover;
    object-position: top center;

    background: #ffffff;
    border: 1px solid rgba(41, 44, 40, 0.08);
    border-radius: 12px;

    box-shadow: var(--shadow-soft);
}


/* ========================================
   5. PROJECT DETAILS
======================================== */

.project-details {
    width: min(var(--container-width), calc(100% - 64px));
    margin-inline: auto;
    padding-block: var(--section-spacing);

    display: grid;
    grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.75fr);
    align-items: start;
    gap: clamp(48px, 9vw, 120px);

    border-top: 1px solid var(--color-border);
}

.project-details__main h2 {
    max-width: 580px;
    margin-bottom: 28px;
}

.project-details__main > p:not(.section-eyebrow) {
    max-width: 680px;
    margin-bottom: 22px;

    color: #65675f;
    font-size: 15px;
    line-height: 1.95;
}

.project-details__main > p:last-child {
    margin-bottom: 0;
}

.project-details__sidebar {
    padding: 30px;

    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.project-details__sidebar .section-eyebrow {
    margin-bottom: 24px;
}

.feature-list {
    display: grid;
    gap: 19px;
}

.feature-list li {
    display: flex;
    align-items: flex-start;
    gap: 13px;

    color: #555850;
    font-size: 13px;
    line-height: 1.65;
}

.feature-list li i {
    width: 18px;
    margin-top: 4px;

    color: var(--color-accent);
    font-size: 14px;
    text-align: center;
}

.project-tech {
    margin-top: 32px;
    padding-top: 26px;
    border-top: 1px solid var(--color-border);
}

.project-tech .section-eyebrow {
    margin-bottom: 10px;
}

.project-tech p:last-child {
    margin-bottom: 0;
    color: var(--color-muted);
    font-size: 12px;
    line-height: 1.9;
}


/* ========================================
   6. DEVELOPMENT REFLECTION
======================================== */

.project-reflection {
    padding: var(--section-spacing) max(32px, calc((100% - var(--container-width)) / 2));

    background: #f0efe9;
}

.project-reflection > .section-eyebrow,
.project-reflection > h2 {
    text-align: center;
}

.project-reflection > .section-eyebrow {
    margin-bottom: 16px;
}

.project-reflection > h2 {
    margin-bottom: 48px;
}

.reflection-grid {
    width: 100%;
    max-width: var(--container-width);
    margin-inline: auto;

    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.reflection-card {
    min-width: 0;
    padding: 30px;

    background: rgba(255, 255, 255, 0.75);
    border: 1px solid #e6e4dc;
    border-radius: var(--radius-md);

    transition:
        transform var(--transition),
        box-shadow var(--transition),
        border-color var(--transition);
}

.reflection-card:hover {
    transform: translateY(-5px);
    border-color: #d4dccc;
    box-shadow: var(--shadow-soft);
}

.reflection-number {
    display: inline-block;
    margin-bottom: 28px;

    color: var(--color-accent);
    font-family: var(--font-heading);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.08em;
}

.reflection-card h3 {
    margin-bottom: 14px;
    font-size: 19px;
}

.reflection-card p {
    margin-bottom: 0;

    color: var(--color-muted);
    font-size: 13px;
    line-height: 1.9;
}


/* ========================================
   7. NEXT PROJECT SECTION
======================================== */

.next-project {
    padding: var(--section-spacing) 24px;
    text-align: center;
}

.next-project .section-eyebrow {
    margin-bottom: 18px;
}

.next-project h2 {
    max-width: 620px;
    margin: 0 auto 28px;
}

.next-project__link {
    display: inline-flex;
    align-items: center;
    gap: 12px;

    padding-bottom: 5px;
    border-bottom: 1px solid var(--color-accent);

    font-size: 13px;
    font-weight: 700;

    transition: color var(--transition);
}

.next-project__link:hover {
    color: var(--color-accent-dark);
}

.next-project__link i {
    transition: transform var(--transition);
}

.next-project__link:hover i {
    transform: translateX(5px);
}


/* ========================================
   8. FOOTER
======================================== */

.site-footer {
    padding: 60px 0 0;

    color: #e9e9e3;
    background: #292c28;
}

.footer__container {
    width: min(var(--container-width), calc(100% - 64px));
    margin-inline: auto;
    padding-bottom: 50px;

    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 50px;
}

.site-logo--footer {
    display: inline-block;
    margin-bottom: 16px;
    color: #ffffff;
}

.site-logo--footer span {
    color: #a8b5a0;
}

.footer__intro {
    max-width: 340px;
}

.footer__intro p {
    max-width: 300px;
    margin-bottom: 0;

    color: #b4b7af;
    font-size: 13px;
    line-height: 1.9;
}

.footer__contact {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.footer__label {
    margin-bottom: 12px;

    color: #a8b5a0;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.footer__email {
    font-size: 14px;
    transition: color var(--transition);
}

.footer__email:hover {
    color: #b8c5b0;
}

.social-list {
    display: flex;
    gap: 12px;
    margin-top: 22px;
}

.social-list a {
    width: 40px;
    height: 40px;

    display: flex;
    align-items: center;
    justify-content: center;

    color: #e9e9e3;
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;

    transition:
        background var(--transition),
        color var(--transition),
        transform var(--transition);
}

.social-list a:hover {
    color: #ffffff;
    background: var(--color-accent-dark);
    transform: translateY(-3px);
}

.social-list i {
    font-size: 14px;
}

.footer__bottom {
    width: min(var(--container-width), calc(100% - 64px));
    margin-inline: auto;
    padding: 20px 0;

    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;

    border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.footer__bottom p {
    margin-bottom: 0;
    color: #a9aca4;
    font-size: 11px;
}


/* ========================================
   9. RESPONSIVE: TABLETS
======================================== */

@media (max-width: 900px) {
    .project-hero {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .project-hero__content {
        max-width: 680px;
    }

    .project-hero__image {
        width: 100%;
        max-width: 700px;
    }

    .project-preview {
        aspect-ratio: 16 / 10;
    }

    .project-details {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .project-details__main {
        max-width: 760px;
    }

    .project-details__sidebar {
        width: 100%;
    }

    .reflection-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .reflection-card:last-child:nth-child(odd) {
        grid-column: 1 / -1;
    }
}


/* ========================================
   10. RESPONSIVE: MOBILE
======================================== */

@media (max-width: 600px) {
    .header__container {
        width: calc(100% - 40px);
        min-height: 72px;
    }

    .site-logo {
        font-size: 25px;
    }

    .nav-toggle {
        display: flex;
    }

    .nav {
        position: absolute;
        top: 100%;
        right: 0;
        left: 0;

        padding: 0 20px;
        overflow: hidden;

        background: var(--color-bg);
        border-bottom: 1px solid var(--color-border);

        visibility: hidden;
        opacity: 0;
        transform: translateY(-8px);

        transition:
            opacity var(--transition),
            transform var(--transition),
            visibility var(--transition);
    }

    /* Add .nav--visible when the menu button is clicked. */
    .nav.nav--visible {
        padding-block: 12px 22px;
        visibility: visible;
        opacity: 1;
        transform: translateY(0);
    }

    .nav__list {
        align-items: stretch;
        flex-direction: column;
        gap: 0;
    }

    .nav__link {
        display: block;
        padding: 12px 4px;
    }

    .nav__link::after {
        display: none;
    }

    .nav-toggle[aria-expanded="true"] .hamburger {
        background: transparent;
    }

    .nav-toggle[aria-expanded="true"] .hamburger::before {
        top: 0;
        transform: rotate(45deg);
    }

    .nav-toggle[aria-expanded="true"] .hamburger::after {
        top: 0;
        transform: rotate(-45deg);
    }

    .project-hero,
    .project-details {
        width: calc(100% - 40px);
    }

    .project-hero {
        padding-block: 35px 65px;
        gap: 36px;
    }

    .back-link {
        margin-bottom: 36px;
    }

    .project-eyebrow,
    .section-eyebrow {
        font-size: 10px;
        letter-spacing: 0.13em;
    }

    .project-title {
        font-size: clamp(46px, 12vw, 64px);
    }

    .project-subtitle {
        font-size: 15px;
    }

    .project-tags {
        gap: 7px;
    }

    .project-tags span {
        padding: 6px 9px;
        font-size: 10px;
    }

    .project-actions {
        align-items: stretch;
    }

    .project-button {
        flex: 1;
        padding-inline: 12px;
        font-size: 11px;
    }

    .project-hero__image {
        padding: 10px;
        border-radius: var(--radius-md);
    }

    .project-preview {
        aspect-ratio: 4 / 3;
        border-radius: 9px;
    }

    .project-details {
        padding-block: 65px;
    }

    .project-details__main h2 {
        font-size: 32px;
    }

    .project-details__main > p:not(.section-eyebrow) {
        font-size: 14px;
        line-height: 1.9;
    }

    .project-details__sidebar {
        padding: 24px;
    }

    .project-reflection {
        padding: 65px 20px;
    }

    .project-reflection > h2 {
        margin-bottom: 32px;
        font-size: 32px;
    }

    .reflection-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .reflection-card,
    .reflection-card:last-child:nth-child(odd) {
        grid-column: auto;
        padding: 25px;
    }

    .reflection-number {
        margin-bottom: 18px;
    }

    .next-project {
        padding-block: 70px;
    }

    .next-project h2 {
        font-size: 31px;
    }

    .site-footer {
        padding-top: 45px;
    }

    .footer__container {
        width: calc(100% - 40px);
        padding-bottom: 35px;

        flex-direction: column;
        gap: 32px;
    }

    .footer__bottom {
        width: calc(100% - 40px);

        align-items: flex-start;
        flex-direction: column;
        gap: 8px;
    }
}


/* ========================================
   11. REDUCED MOTION ACCESSIBILITY
======================================== */

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