/* Dark background for gallery and contact pages */
.dark-bg {
    background: #a6ad94;
}
/* ============================================
   RIVERBEND ART — Stylesheet
   A clean, gallery-level artist website
   ============================================ */

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

:root {
    --color-bg: #f0ebe4;
    --color-bg-warm: #e8e1d8;
    --color-text: #2c2a26;
    --color-text-light: #5e5850;
    --color-text-muted: #8c857b;
    --color-accent: #7a6e5a;
    --color-border: #d4cdc3;
    --color-white: #ffffff;
    --color-overlay: rgba(44, 42, 38, 0.55);

    --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --max-width: 1280px;
    --nav-height: 80px;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
}

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

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

/* --- Typography --- */
h1, h2, h3, h4 {
    font-family: var(--font-serif);
    font-weight: 400;
    line-height: 1.3;
}

h1 {
    font-size: 3rem;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 2rem;
    letter-spacing: -0.01em;
}

h3 {
    font-size: 1.25rem;
}

p {
    max-width: 640px;
}

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--nav-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 3rem;
    background: rgba(240, 235, 228, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    transition: background 0.3s ease;
}

.nav--transparent {
    background: transparent;
    border-bottom: none;
}

.nav--transparent .nav__brand,
.nav--transparent .nav__link {
    color: var(--color-white);
}

.nav--scrolled {
    background: rgba(240, 235, 228, 0.97);
    border-bottom: 1px solid var(--color-border);
}

.nav--scrolled .nav__brand,
.nav--scrolled .nav__link {
    color: var(--color-text);
}

.nav__brand {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    font-weight: 400;
    letter-spacing: 0.04em;
    color: var(--color-text);
    transition: color 0.3s ease;
}

/* Always-on brand link for mobile */
.nav__brand--fixed {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 2000;
    padding: 0.7rem 1.5rem;
    background: none;
    color: var(--color-white);
    pointer-events: auto;
}

@media (min-width: 769px) {
    .nav__brand--fixed {
        display: none;
    }
}

/* Always-on brand link for mobile, all pages */
.nav__brand--fixed {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 2000;
    padding: 0.7rem 0.7rem 0.7rem 1.5rem;
    background: rgba(44, 42, 38, 0.85);
    color: var(--color-white);
    pointer-events: auto;
    font-family: var(--font-serif);
    font-size: 1.4rem;
    font-weight: 400;
    letter-spacing: 0.04em;
    transition: color 0.3s ease;
    text-align: left;
    border-bottom-right-radius: 12px;
}
@media (min-width: 769px) {
    .nav__brand--fixed {
        display: none;
    }
}

.nav__links {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav__link {
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-text-light);
    transition: color 0.3s ease;
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: currentColor;
    transition: width 0.3s ease;
}

.nav__link:hover::after,
.nav__link--active::after {
    width: 100%;
}

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

/* Mobile menu toggle */
.nav__toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav__toggle span {
    display: block;
    width: 24px;
    height: 1.5px;
    background: var(--color-text);
    margin: 6px 0;
    transition: all 0.3s ease;
}

/* --- Hero Section --- */
.hero {
    position: relative;
    width: 100%;
    height: 100vh;
    min-height: 600px;
    overflow: hidden;
}

.hero__image {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 30%;
}

.hero__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        rgba(0,0,0,0.15) 0%,
        rgba(0,0,0,0.05) 40%,
        rgba(0,0,0,0.35) 100%
    );
}

.hero__content {
    position: absolute;
    bottom: 8%;
    left: 3rem;
    right: 3rem;
    max-width: 640px;
    color: var(--color-white);
}

.hero__title {
    font-size: 3.5rem;
    font-weight: 400;
    line-height: 1.15;
    margin-bottom: 1.25rem;
    text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.hero__subtitle {
    font-size: 1.05rem;
    line-height: 1.8;
    font-weight: 300;
    opacity: 0.92;
    text-shadow: 0 1px 10px rgba(0,0,0,0.3);
}

/* --- Sections --- */
.section {
    padding: 6rem 3rem;
}

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

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

.section__header {
    margin-bottom: 3.5rem;
}

.section__title {
    margin-bottom: 1rem;
    color: var(--color-text);
}

.section__subtitle {
    color: var(--color-text-light);
    font-size: 1rem;
}

.section__divider {
    display: block;
    width: 48px;
    height: 1px;
    background: var(--color-accent);
    margin: 1.5rem auto;
    border: none;
}

/* --- Image Grid (Home selected works) --- */
.grid {
    display: grid;
    gap: 1.5rem;
}

.grid--home {
    grid-template-columns: repeat(3, 1fr);
}

.grid--gallery {
    grid-template-columns: repeat(3, 1fr);
}

.grid__item {
    position: relative;
    overflow: hidden;
    background: var(--color-bg-warm);
    cursor: pointer;
}

.grid__item::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0);
    transition: background 0.4s ease;
}

.grid__item:hover::after {
    background: rgba(0,0,0,0.08);
}

.grid__image-wrapper {
    position: relative;
    width: 100%;
    padding-top: 120%;
    overflow: hidden;
}

.grid__image-wrapper--landscape {
    padding-top: 75%;
}

.grid__image {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.grid__item:hover .grid__image {
    transform: scale(1.03);
}

.grid__caption {
    padding: 1rem 0.25rem;
}

.grid__title {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 400;
    color: var(--color-text);
}

.grid__meta {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-top: 0.25rem;
}

.grid__status {
    font-size: 0.7rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-top: 0.35rem;
    color: var(--color-accent);
    font-style: italic;
}

/* Fade transition for filtering */
.grid__item {
    transition: opacity 0.35s ease, transform 0.35s ease;
}

.grid__item--hidden {
    display: none;
}

/* --- Filter Tabs --- */
.filters {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filters__btn {
    font-family: var(--font-sans);
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem 0.25rem;
    position: relative;
    transition: color 0.3s ease;
}

.filters__btn::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: width 0.3s ease;
}

.filters__btn:hover {
    color: var(--color-text-light);
}

.filters__btn--active {
    color: var(--color-text);
}

.filters__btn--active::after {
    width: 100%;
}

/* --- View More Link --- */
.view-more {
    display: inline-block;
    margin-top: 3rem;
    font-size: 0.85rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-accent);
    border-bottom: 1px solid var(--color-accent);
    padding-bottom: 2px;
    transition: color 0.3s ease, border-color 0.3s ease;
}

.view-more:hover {
    color: var(--color-text);
    border-color: var(--color-text);
}

/* --- About Page --- */
.about {
    padding-top: calc(var(--nav-height) + 4rem);
}

.about__layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: start;
    max-width: var(--max-width);
    margin: 0 auto;
}

.about__image-col {
    position: sticky;
    top: calc(var(--nav-height) + 2rem);
}

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

.about__content {
    padding: 2rem 0;
}

.about__label {
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
}

.about__heading {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    line-height: 1.2;
}

.about__text {
    margin-bottom: 1.5rem;
    color: var(--color-text-light);
    font-size: 1rem;
    line-height: 1.85;
    max-width: 540px;
}

.about__text:last-of-type {
    margin-bottom: 0;
}

.about__signature {
    margin-top: 2.5rem;
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 1.1rem;
    color: var(--color-accent);
}

/* --- Contact Page --- */
.contact {
    padding-top: calc(var(--nav-height) + 4rem);
}

.contact__layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    max-width: var(--max-width);
    margin: 0 auto;
}

.contact__info {
    padding: 2rem 0;
}

.contact__heading {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.contact__text {
    color: var(--color-text-light);
    margin-bottom: 2.5rem;
    line-height: 1.8;
    max-width: 420px;
}

.contact__detail {
    margin-bottom: 1.5rem;
}

.contact__detail-label {
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: 0.35rem;
}

.contact__detail-value {
    font-size: 1rem;
    color: var(--color-text);
}

.contact__detail-value a {
    border-bottom: 1px solid var(--color-border);
    transition: border-color 0.3s ease;
}

.contact__detail-value a:hover {
    border-color: var(--color-text);
}

/* --- Form --- */
.form {
    padding: 2rem 0;
}

.form__group {
    margin-bottom: 1.75rem;
}

.form__label {
    display: block;
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
}

.form__input,
.form__textarea {
    width: 100%;
    padding: 0.85rem 0;
    font-family: var(--font-sans);
    font-size: 1rem;
    color: var(--color-text);
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--color-border);
    outline: none;
    transition: border-color 0.3s ease;
}

.form__input:focus,
.form__textarea:focus {
    border-color: var(--color-accent);
}

.form__input::placeholder,
.form__textarea::placeholder {
    color: var(--color-text-muted);
}

.form__textarea {
    resize: vertical;
    min-height: 120px;
    line-height: 1.6;
}

.form__select {
    width: 100%;
    padding: 0.85rem 0;
    font-family: var(--font-sans);
    font-size: 1rem;
    color: var(--color-text);
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--color-border);
    outline: none;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    transition: border-color 0.3s ease;
}

.form__select:focus {
    border-color: var(--color-accent);
}

.form__submit {
    display: inline-block;
    margin-top: 1rem;
    padding: 0.9rem 2.5rem;
    font-family: var(--font-sans);
    font-size: 0.85rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-white);
    background: var(--color-text);
    border: 1px solid var(--color-text);
    cursor: pointer;
    transition: all 0.3s ease;
}

.form__submit:hover {
    background: transparent;
    color: var(--color-text);
}

/* --- Gallery Page Header --- */
.page-header {
    padding-top: calc(var(--nav-height) + 4rem);
    padding-bottom: 3rem;
    text-align: center;
}

.page-header__title {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
}

.page-header__subtitle {
    color: var(--color-text-light);
    font-size: 1rem;
}

/* --- Lightbox / Detail Modal --- */
.lightbox {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: rgba(240, 235, 228, 0.97);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    overflow-y: auto;
}

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

.lightbox__inner {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 3rem;
    max-width: 1100px;
    width: 90%;
    max-height: 90vh;
    padding: 2rem;
}

.lightbox__image-col {
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.lightbox__image {
    max-width: 100%;
    max-height: 80vh;
    object-fit: contain;
}

.lightbox__info {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 2rem 0;
}

.lightbox__title {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
}

.lightbox__detail {
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

.lightbox__detail-label {
    color: var(--color-text-muted);
    font-size: 0.8rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    display: block;
    margin-bottom: 0.2rem;
}

.lightbox__detail-value {
    color: var(--color-text);
}

.lightbox__close {
    position: fixed;
    top: 1.5rem;
    right: 2rem;
    z-index: 2001;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-text-light);
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.3s ease;
}

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

/* --- Footer --- */
.footer {
    padding: 3rem;
    text-align: center;
    border-top: 1px solid var(--color-border);
}

.footer__text {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    letter-spacing: 0.04em;
}

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

/* --- Utility --- */
.spacer { height: var(--nav-height); }

/* --- Responsive --- */
@media (max-width: 1024px) {
    .grid--home,
    .grid--gallery {
        grid-template-columns: repeat(2, 1fr);
    }

    .about__layout,
    .contact__layout {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .about__image-col {
        position: static;
    }

    .lightbox__inner {
        grid-template-columns: 1fr;
        max-height: none;
    }

    .lightbox__image {
        max-height: 50vh;
    }

    .hero__title {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    :root {
        --nav-height: 64px;
    }

    .section {
        padding: 4rem 1.5rem;
    }

    .nav {
        padding: 0 1.5rem;
    }

    .nav__links {
        display: none;
        position: fixed;
        top: 3.2rem;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 999;
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        gap: 2rem;
        background: rgba(44, 42, 38, 0.95);
        padding-top: 2.5rem;
    }

    .nav__links--open {
        display: flex;
    }

    .nav__links .nav__link {
        color: var(--color-white);
        font-size: 1.1rem;
    }

    .nav__toggle {
        display: block;
        z-index: 1001;
        position: fixed;
        top: 0.5rem;
        right: 0.5rem;
        left: auto;
        background: none;
    }

    .nav__brand {
        z-index: 1001;
        position: relative;
    }

    /* Transform hamburger into X when open */
    .nav__toggle--open span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 6px);
        background: var(--color-white);
    }

    .nav__toggle--open span:nth-child(2) {
        opacity: 0;
    }

    .nav__toggle--open span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -6px);
        background: var(--color-white);
    }

    .nav--transparent .nav__toggle span {
        background: var(--color-white);
    }

    .nav--scrolled .nav__toggle span {
        background: var(--color-text);
    }

    .nav__link {
        font-size: 1rem;
    }

    .grid--home,
    .grid--gallery {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .hero__content {
        left: 1.5rem;
        right: 1.5rem;
    }

    .hero__title {
        font-size: 2rem;
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }

    .about__heading,
    .contact__heading,
    .page-header__title {
        font-size: 1.8rem;
    }

    .lightbox__inner {
        width: 95%;
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    .hero__title {
        font-size: 1.6rem;
    }

    .hero__subtitle {
        font-size: 0.95rem;
    }
}