/* ==========================================================================
   Carlos Riera — Jewelry
   Minimal, responsive, SEO-friendly stylesheet
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties
   -------------------------------------------------------------------------- */
:root {
    --color-bg: #faf9f7;
    --color-surface: #ffffff;
    --color-text: #1a1a1a;
    --color-muted: #6b6b6b;
    --color-accent: #b08d57;
    --color-accent-dark: #8a6b3d;
    --color-dark: #0f0f0f;
    --color-overlay: rgba(15, 15, 15, 0.45);

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

    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-xxl: 6rem;

    --radius: 2px;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --transition: 0.3s ease;

    --container: 1280px;
    --header-height: 72px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

button {
    font: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

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

h1, h2, h3, h4, p {
    margin: 0;
}

:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

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

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

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -0.02em;
    text-transform: uppercase;
    color: var(--color-text);
}

.section-subtitle {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.lead {
    font-size: clamp(1.05rem, 2vw, 1.25rem);
    line-height: 1.8;
    color: var(--color-muted);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 1000;
    height: var(--header-height);
    display: flex;
    align-items: center;
    transition: background-color var(--transition), box-shadow var(--transition);
}

.header--scrolled {
    background-color: rgba(250, 249, 247, 0.96);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
    backdrop-filter: blur(8px);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.logo__icon {
    width: 40px;
    height: 40px;
}

.logo__text {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-surface);
    transition: color var(--transition);
}

.header--scrolled .logo__text {
    color: var(--color-text);
}

.header--scrolled .logo__icon {
    filter: invert(1) brightness(0.15);
}

.nav {
    display: none;
}

.nav__list {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav__link {
    position: relative;
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-surface);
    padding-block: var(--space-xs);
}

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

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

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

.nav__cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-surface);
    background-color: var(--color-accent);
    border-radius: var(--radius);
    transition: background-color var(--transition), transform var(--transition);
}

.nav__cta:hover,
.nav__cta:focus {
    background-color: var(--color-accent-dark);
    transform: translateY(-1px);
}

/* Mobile menu toggle */
.menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    width: 44px;
    height: 44px;
    padding: 10px;
    z-index: 1001;
}

.menu-toggle__bar {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-surface);
    transition: background-color var(--transition), transform var(--transition), opacity var(--transition);
}

.header--scrolled .menu-toggle__bar {
    background-color: var(--color-text);
}

.menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(2) {
    opacity: 0;
}

.menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */
.hero {
    position: relative;
    min-height: 100svh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    color: var(--color-surface);
}

.hero__media {
    position: absolute;
    inset: 0;
    z-index: -2;
}

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

.hero__overlay {
    position: absolute;
    inset: 0;
    z-index: -1;
    background: linear-gradient(
        to bottom,
        rgba(15, 15, 15, 0.35) 0%,
        rgba(15, 15, 15, 0.25) 50%,
        rgba(15, 15, 15, 0.55) 100%
    );
}

.hero__content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    padding-inline: var(--space-md);
    padding-bottom: var(--space-xl);
}

.hero__logo {
    width: clamp(120px, 30vw, 220px);
    height: auto;
    margin-inline: auto;
    margin-bottom: var(--space-lg);
    filter: drop-shadow(0 4px 20px rgba(0, 0, 0, 0.25));
}

.hero__title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 6vw, 4.5rem);
    font-weight: 400;
    line-height: 1.05;
    letter-spacing: -0.02em;
    text-transform: uppercase;
    margin-bottom: var(--space-md);
}

.hero__tagline {
    font-size: clamp(1rem, 2vw, 1.35rem);
    font-weight: 300;
    letter-spacing: 0.04em;
    margin-bottom: var(--space-lg);
    opacity: 0.92;
}

.hero__meta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    opacity: 0.85;
}

.hero__meta::before,
.hero__meta::after {
    content: '';
    display: block;
    width: 40px;
    height: 1px;
    background-color: currentColor;
    opacity: 0.5;
}

.hero__scroll {
    position: absolute;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-surface);
    opacity: 0.7;
    animation: bounce 2s infinite;
}

.hero__scroll svg {
    width: 24px;
    height: 24px;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-8px); }
    60% { transform: translateX(-50%) translateY(-4px); }
}

/* --------------------------------------------------------------------------
   About
   -------------------------------------------------------------------------- */
.about {
    background-color: var(--color-surface);
}

.about__grid {
    display: grid;
    gap: var(--space-xl);
    align-items: center;
}

.about__content {
    max-width: 640px;
}

.about__title {
    margin-bottom: var(--space-md);
}

.about__text {
    margin-bottom: var(--space-md);
}

.about__text p + p {
    margin-top: var(--space-sm);
}

.about__signature {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-style: italic;
    color: var(--color-accent);
    margin-top: var(--space-md);
}

.about__media {
    position: relative;
}

.about__media img {
    width: 100%;
    aspect-ratio: 4 / 5;
    object-fit: cover;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

/* --------------------------------------------------------------------------
   Collection
   -------------------------------------------------------------------------- */
.collection {
    background-color: var(--color-bg);
}

.collection__header {
    text-align: center;
    max-width: 700px;
    margin-inline: auto;
    margin-bottom: var(--space-xl);
}

.collection__header .section-title {
    margin-bottom: var(--space-sm);
}

.gallery {
    display: grid;
    gap: var(--space-sm);
    grid-template-columns: 1fr;
}

.gallery__item {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius);
    background-color: var(--color-surface);
    box-shadow: var(--shadow);
}

.gallery__item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition);
}

.gallery__item:hover img,
.gallery__item:focus-within img {
    transform: scale(1.04);
}

.gallery__caption {
    position: absolute;
    inset: auto 0 0 0;
    padding: var(--space-md);
    background: linear-gradient(to top, rgba(15, 15, 15, 0.7), transparent);
    color: var(--color-surface);
    transform: translateY(100%);
    transition: transform var(--transition);
}

.gallery__item:hover .gallery__caption,
.gallery__item:focus-within .gallery__caption {
    transform: translateY(0);
}

.gallery__caption h3 {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.gallery__caption p {
    font-size: 0.8rem;
    opacity: 0.85;
    margin-top: 0.25rem;
}

/* --------------------------------------------------------------------------
   Philosophy
   -------------------------------------------------------------------------- */
.philosophy {
    background-color: var(--color-surface);
}

.philosophy__header {
    text-align: center;
    max-width: 760px;
    margin-inline: auto;
    margin-bottom: var(--space-xl);
}

.philosophy__grid {
    display: grid;
    gap: var(--space-md);
}

.philosophy__card {
    padding: var(--space-lg);
    background-color: var(--color-bg);
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: var(--radius);
    transition: transform var(--transition), box-shadow var(--transition);
}

.philosophy__card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.philosophy__number {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 400;
    line-height: 1;
    color: var(--color-accent);
    opacity: 0.35;
    margin-bottom: var(--space-sm);
}

.philosophy__card h3 {
    font-family: var(--font-serif);
    font-size: 1.35rem;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    margin-bottom: var(--space-xs);
}

.philosophy__card p {
    font-size: 0.95rem;
    color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   Waves
   -------------------------------------------------------------------------- */
.waves {
    position: relative;
    min-height: 80svh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--color-surface);
    overflow: hidden;
}

.waves__media {
    position: absolute;
    inset: 0;
    z-index: -2;
}

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

.waves__overlay {
    position: absolute;
    inset: 0;
    z-index: -1;
    background: rgba(15, 15, 15, 0.5);
}

.waves__content {
    position: relative;
    z-index: 1;
    max-width: 760px;
    padding-inline: var(--space-md);
}

.waves__title {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 7vw, 5.5rem);
    font-weight: 400;
    line-height: 1;
    text-transform: uppercase;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-md);
}

.waves__text {
    font-size: clamp(1rem, 2vw, 1.25rem);
    font-weight: 300;
    line-height: 1.8;
    opacity: 0.92;
}

/* --------------------------------------------------------------------------
   Contact
   -------------------------------------------------------------------------- */
.contact {
    background-color: var(--color-dark);
    color: var(--color-surface);
}

.contact__grid {
    display: grid;
    gap: var(--space-xl);
    align-items: start;
}

.contact__title {
    color: var(--color-surface);
    margin-bottom: var(--space-md);
}

.contact__lead {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--space-lg);
}

.contact__info {
    display: grid;
    gap: var(--space-md);
}

.contact__item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
}

.contact__item svg {
    width: 22px;
    height: 22px;
    flex-shrink: 0;
    margin-top: 0.2rem;
    color: var(--color-accent);
}

.contact__item strong {
    display: block;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: 0.2rem;
}

.contact__item a:hover {
    color: var(--color-accent);
}

.contact__form {
    display: grid;
    gap: var(--space-md);
}

.form-group {
    display: grid;
    gap: 0.35rem;
}

.form-group label {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: rgba(255, 255, 255, 0.7);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.85rem 1rem;
    font-size: 1rem;
    color: var(--color-surface);
    background-color: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius);
    transition: border-color var(--transition), background-color var(--transition);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.35);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--color-accent);
    background-color: rgba(255, 255, 255, 0.1);
    outline: none;
}

.form-group textarea {
    min-height: 140px;
    resize: vertical;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: 1rem 2rem;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-surface);
    background-color: var(--color-accent);
    border-radius: var(--radius);
    transition: background-color var(--transition), transform var(--transition);
}

.btn:hover,
.btn:focus {
    background-color: var(--color-accent-dark);
    transform: translateY(-2px);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    padding-block: var(--space-lg);
    background-color: var(--color-dark);
    color: rgba(255, 255, 255, 0.5);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer__inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    text-align: center;
}

.footer__logo {
    width: 48px;
    height: 48px;
    opacity: 0.7;
}

.footer__copy {
    font-size: 0.8rem;
}

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

.footer__links a {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.footer__links a:hover {
    color: var(--color-surface);
}

/* --------------------------------------------------------------------------
   Reveal on scroll
   -------------------------------------------------------------------------- */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (min-width: 768px) {
    :root {
        --header-height: 80px;
    }

    .section {
        padding-block: var(--space-xxl);
    }

    .nav {
        display: block;
    }

    .menu-toggle {
        display: none;
    }

    .about__grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-xxl);
    }

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

    .gallery__item--tall {
        grid-row: span 2;
    }

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

    .contact__grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-xxl);
    }

    .footer__inner {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
}

@media (min-width: 1024px) {
    .container {
        padding-inline: var(--space-xl);
    }

    .gallery {
        grid-template-columns: repeat(3, 1fr);
        grid-auto-rows: 320px;
    }

    .gallery__item--wide {
        grid-column: span 2;
    }

    .philosophy__grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* --------------------------------------------------------------------------
   Mobile navigation panel
   -------------------------------------------------------------------------- */
.mobile-nav {
    position: fixed;
    inset: 0;
    z-index: 999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
    background-color: var(--color-dark);
    color: var(--color-surface);
    transform: translateX(100%);
    transition: transform var(--transition);
}

.mobile-nav.is-open {
    transform: translateX(0);
}

.mobile-nav__link {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-surface);
}

.mobile-nav__link:hover,
.mobile-nav__link:focus {
    color: var(--color-accent);
}

.mobile-nav__cta {
    margin-top: var(--space-md);
}

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