/* ===================================================
   CESAR CEBREROS — PORTFOLIO
   Aesthetic: Editorial dark + warm accents
   Fonts: Syne (display) + DM Sans (body)
   =================================================== */

:root {
    --color-bg: #0a0a0b;
    --color-bg-alt: #111113;
    --color-surface: #18181b;
    --color-surface-hover: #1f1f23;
    --color-border: rgba(255, 255, 255, 0.08);
    --color-text: #f0f0f2;
    --color-text-muted: #a8a8b3;
    --color-text-dim: #71717a;
    --color-heading: #ffffff;
    --color-accent: #c084fc;
    --color-accent-secondary: #38bdf8;
    --color-accent-warm: #fb923c;
    --font-display: 'Syne', sans-serif;
    --font-body: 'DM Sans', sans-serif;
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
}

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

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

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
}

::selection {
    background: var(--color-accent);
    color: var(--color-bg);
}

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

/* ---- Grain Overlay ---- */
.grain-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9000;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 128px 128px;
}

/* ---- Preloader ---- */
#preloader {
    position: fixed;
    inset: 0;
    background: var(--color-bg);
    z-index: 10000;
    display: flex;
    align-items: flex-end;
    transition: opacity 0.6s var(--ease-out-expo), visibility 0.6s;
}

#preloader.loaded {
    opacity: 0;
    visibility: hidden;
}

.loader-bar {
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-secondary));
    transition: width 0.4s var(--ease-out-expo);
}

#preloader.loading .loader-bar {
    width: 70%;
}

#preloader.loaded .loader-bar {
    width: 100%;
}

/* ---- Container ---- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 clamp(1.5rem, 5vw, 4rem);
}

/* ---- Language Toggle ---- */
.lang-btn {
    position: fixed;
    bottom: 2rem;
    left: 2rem;
    z-index: 8000;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    padding: 0.6rem 1rem;
    border-radius: 100px;
    cursor: pointer;
    transition: all 0.3s var(--ease-out-quart);
    backdrop-filter: blur(12px);
}

.lang-btn:hover {
    background: var(--color-surface-hover);
    color: var(--color-text);
    border-color: rgba(255, 255, 255, 0.15);
}

/* ---- Navigation ---- */
.nav-main {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 7000;
    padding: 1.5rem 0;
    transition: all 0.4s var(--ease-out-quart);
}

.nav-main.scrolled {
    padding: 0.75rem 0;
    background: rgba(10, 10, 11, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--color-border);
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 clamp(1.5rem, 5vw, 4rem);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--color-heading);
    letter-spacing: -0.02em;
    transition: opacity 0.3s;
}

.nav-logo:hover {
    opacity: 0.7;
}

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

.nav-link {
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-muted);
    letter-spacing: 0.02em;
    position: relative;
    transition: color 0.3s;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: width 0.4s var(--ease-out-expo);
}

.nav-link:hover {
    color: var(--color-heading);
}

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

/* ---- Mobile Nav ---- */
.nav-menu-btn {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all 0.3s var(--ease-out-quart);
    transform-origin: center;
}

.nav-menu-btn.active span:first-child {
    transform: translateY(4px) rotate(45deg);
}

.nav-menu-btn.active span:last-child {
    transform: translateY(-4px) rotate(-45deg);
}

.mobile-menu {
    position: fixed;
    inset: 0;
    z-index: 6500;
    background: rgba(10, 10, 11, 0.97);
    backdrop-filter: blur(24px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.5s var(--ease-out-expo);
}

.mobile-menu.open {
    opacity: 1;
    visibility: visible;
}

.mobile-menu-links {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.mobile-menu-links a {
    font-family: var(--font-display);
    font-size: clamp(2rem, 6vw, 3.5rem);
    font-weight: 700;
    color: var(--color-text-muted);
    transition: color 0.3s, transform 0.3s;
    transform: translateY(20px);
    opacity: 0;
}

.mobile-menu.open .mobile-menu-links a {
    transform: translateY(0);
    opacity: 1;
}

.mobile-menu-links a:nth-child(1) { transition-delay: 0.1s; }
.mobile-menu-links a:nth-child(2) { transition-delay: 0.15s; }
.mobile-menu-links a:nth-child(3) { transition-delay: 0.2s; }
.mobile-menu-links a:nth-child(4) { transition-delay: 0.25s; }
.mobile-menu-links a:nth-child(5) { transition-delay: 0.3s; }

.mobile-menu-links a:hover {
    color: var(--color-heading);
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-menu-btn { display: flex; }
}

/* ---- Hero Section ---- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding: 8rem 0 4rem;
}

#particles {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.hero-bg-shapes {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.15;
}

.shape-1 {
    width: 600px;
    height: 600px;
    background: var(--color-accent);
    top: -15%;
    right: -10%;
    animation: float-slow 20s ease-in-out infinite;
}

.shape-2 {
    width: 400px;
    height: 400px;
    background: var(--color-accent-secondary);
    bottom: -10%;
    left: -5%;
    animation: float-slow 25s ease-in-out infinite reverse;
}

.shape-3 {
    width: 300px;
    height: 300px;
    background: var(--color-accent-warm);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: float-slow 18s ease-in-out infinite;
}

@keyframes float-slow {
    0%, 100% { transform: translate(0, 0); }
    33% { transform: translate(30px, -40px); }
    66% { transform: translate(-20px, 20px); }
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 clamp(1.5rem, 5vw, 4rem);
    position: relative;
    z-index: 1;
}

.hero-greeting {
    font-family: var(--font-body);
    font-size: clamp(0.9rem, 1.5vw, 1.1rem);
    color: var(--color-accent);
    font-weight: 500;
    margin-bottom: 1rem;
    letter-spacing: 0.05em;
}

.hero-name {
    font-family: var(--font-display);
    font-weight: 800;
    line-height: 1;
    letter-spacing: -0.04em;
    margin-bottom: 1.5rem;
}

.name-line {
    display: block;
    font-size: clamp(3.5rem, 10vw, 8rem);
    color: var(--color-heading);
}

.accent-dot {
    color: var(--color-accent);
}

.hero-role {
    font-family: var(--font-body);
    font-size: clamp(1rem, 2vw, 1.35rem);
    color: var(--color-text-muted);
    font-weight: 400;
    margin-bottom: 0.75rem;
}

.hero-location {
    font-size: 0.9rem;
    color: var(--color-text-dim);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 2.5rem;
}

.location-pin {
    color: var(--color-accent-warm);
    font-size: 0.8rem;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* ---- Buttons ---- */
.btn-primary-custom {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 2rem;
    background: var(--color-accent);
    color: var(--color-bg);
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 100px;
    border: none;
    cursor: pointer;
    transition: all 0.35s var(--ease-out-quart);
    text-decoration: none;
}

.btn-primary-custom:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(192, 132, 252, 0.3);
}

.btn-outline-custom {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 2rem;
    background: transparent;
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: 100px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    cursor: pointer;
    transition: all 0.35s var(--ease-out-quart);
    text-decoration: none;
}

.btn-outline-custom:hover {
    border-color: rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.06);
    transform: translateY(-2px);
}

/* ---- Scroll Indicator ---- */
.hero-scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    animation: scroll-pulse 2s ease-in-out infinite;
}

@keyframes scroll-pulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.6); transform-origin: top; }
    50% { opacity: 1; transform: scaleY(1); }
}

/* ---- Sections ---- */
.section {
    padding: clamp(5rem, 12vw, 9rem) 0;
    position: relative;
}

.section-alt {
    background-color: var(--color-bg-alt);
}

.section-label {
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-accent);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--color-heading);
    line-height: 1.2;
    letter-spacing: -0.02em;
    max-width: 700px;
    margin-bottom: 3.5rem;
}

/* ---- Reveal Animations ---- */
.reveal-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s var(--ease-out-expo), transform 0.8s var(--ease-out-expo);
}

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

.reveal-text {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s var(--ease-out-expo), transform 0.7s var(--ease-out-expo);
    transition-delay: var(--delay, 0s);
}

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

/* ---- About Section ---- */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-description {
    font-size: 1.05rem;
    color: var(--color-text);
    line-height: 1.75;
    margin-bottom: 1.25rem;
}

.about-stats {
    display: grid;
    gap: 2.5rem;
    padding: 2.5rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 16px;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-heading);
    line-height: 1;
    display: inline;
}

.stat-suffix {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-accent);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-top: 0.5rem;
}

@media (max-width: 768px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
}

/* ---- Speaking Section ---- */
.speaking-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.speaking-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.4s var(--ease-out-quart);
    position: relative;
}

.speaking-card:hover {
    border-color: rgba(255, 255, 255, 0.12);
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.speaking-card-accent {
    height: 4px;
    width: 100%;
}

.talent-land-accent {
    background: linear-gradient(90deg, #6366f1, #a855f7, #ec4899);
}

.cis-accent {
    background: linear-gradient(90deg, #059669, #38bdf8);
}

.speaking-card-content {
    padding: 2rem;
}

.speaking-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
}

.speaking-event-badge {
    font-family: var(--font-display);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-bg);
    background: linear-gradient(135deg, #a855f7, #6366f1);
    padding: 0.35rem 0.85rem;
    border-radius: 100px;
}

.cis-badge {
    background: linear-gradient(135deg, #10b981, #38bdf8);
}

.speaking-location {
    font-size: 0.8rem;
    color: var(--color-text-dim);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.speaking-location i {
    color: var(--color-accent-warm);
    font-size: 0.7rem;
}

.speaking-title {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-heading);
    line-height: 1.3;
    margin-bottom: 0.75rem;
}

.speaking-desc {
    font-size: 0.9rem;
    color: var(--color-text);
    line-height: 1.7;
    margin-bottom: 1.25rem;
}

.speaking-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.speaking-tags span {
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--color-text-muted);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border);
    padding: 0.25rem 0.65rem;
    border-radius: 100px;
}

@media (max-width: 768px) {
    .speaking-grid {
        grid-template-columns: 1fr;
    }
}

/* ---- Skills Grid ---- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

.skill-card-modern {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 14px;
    padding: 2rem;
    transition: all 0.4s var(--ease-out-quart);
    transition-delay: var(--delay, 0s);
}

.skill-card-modern:hover {
    border-color: rgba(255, 255, 255, 0.12);
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.skill-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: rgba(192, 132, 252, 0.1);
    margin-bottom: 1.25rem;
    font-size: 1.25rem;
    color: var(--color-accent);
    transition: background 0.3s;
}

.skill-card-modern:hover .skill-icon {
    background: rgba(192, 132, 252, 0.18);
}

.skill-card-modern h3 {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-heading);
    margin-bottom: 0.5rem;
}

.skill-card-modern p {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
    line-height: 1.5;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.skill-tags span {
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--color-text-muted);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border);
    padding: 0.25rem 0.65rem;
    border-radius: 100px;
}

@media (max-width: 1024px) {
    .skills-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
    .skills-grid { grid-template-columns: 1fr; }
}

/* ---- Portfolio Filters ---- */
.portfolio-filters {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
}

.filter-btn {
    font-family: var(--font-body);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-text-dim);
    background: transparent;
    border: 1px solid var(--color-border);
    padding: 0.5rem 1.25rem;
    border-radius: 100px;
    cursor: pointer;
    transition: all 0.3s var(--ease-out-quart);
}

.filter-btn:hover {
    color: var(--color-text);
    border-color: rgba(255, 255, 255, 0.2);
}

.filter-btn.active {
    color: var(--color-bg);
    background: var(--color-accent);
    border-color: var(--color-accent);
}

/* ---- Work Grid ---- */
.work-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.work-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.4s var(--ease-out-quart);
}

.work-card:hover {
    border-color: rgba(255, 255, 255, 0.12);
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.work-card.hidden {
    display: none;
}

.work-card-visual {
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: rgba(255, 255, 255, 0.9);
    position: relative;
    overflow: hidden;
}

.web-gradient { background: linear-gradient(135deg, #6366f1, #a855f7, #ec4899); }
.web-gradient-alt { background: linear-gradient(135deg, #0ea5e9, #6366f1); }
.ios-gradient { background: linear-gradient(135deg, #1e1e1e, #3b3b3b); }
.ios-gradient-alt { background: linear-gradient(135deg, #f59e0b, #ef4444); }
.android-gradient { background: linear-gradient(135deg, #059669, #10b981); }
.android-gradient-alt { background: linear-gradient(135deg, #dc2626, #f97316); }

.work-card-visual::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, var(--color-surface) 0%, transparent 50%);
}

.work-card-info {
    padding: 1.5rem;
}

.work-tag {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.work-card-info h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-heading);
    margin: 0.5rem 0;
}

.work-card-info p {
    font-size: 0.85rem;
    color: var(--color-text);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.work-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-accent);
    transition: gap 0.3s var(--ease-out-quart);
}

.work-link:hover {
    gap: 0.75rem;
}

@media (max-width: 768px) {
    .work-grid {
        grid-template-columns: 1fr;
    }
}

/* ---- Contact Section ---- */
.contact-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    color: var(--color-heading);
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
}

.contact-subtitle {
    font-size: 1.05rem;
    color: var(--color-text);
    max-width: 500px;
    margin-bottom: 2.5rem;
    line-height: 1.7;
}

.contact-actions {
    margin-bottom: 2.5rem;
}

.social-row {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--color-border);
    border-radius: 50%;
    font-size: 1.15rem;
    color: var(--color-text-muted);
    transition: all 0.3s var(--ease-out-quart);
}

.social-link:hover {
    color: var(--color-heading);
    border-color: rgba(255, 255, 255, 0.25);
    transform: translateY(-3px);
}

/* ---- Footer ---- */
.footer {
    padding: 2.5rem 0;
    border-top: 1px solid var(--color-border);
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--color-text-dim);
}

.footer-year {
    color: var(--color-text-dim);
}

@media (max-width: 600px) {
    .footer-inner {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
}

/* ---- Back to Top ---- */
#back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 8000;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.4s var(--ease-out-quart);
}

#back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

#back-to-top:hover {
    background: var(--color-surface-hover);
    color: var(--color-heading);
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-3px);
}

/* ---- Responsive Fine-Tuning ---- */
@media (max-width: 480px) {
    .hero { padding: 6rem 0 3rem; }
    .hero-cta { flex-direction: column; }
    .hero-cta a { text-align: center; justify-content: center; }
    .lang-btn { bottom: 1rem; left: 1rem; }
    #back-to-top { bottom: 1rem; right: 1rem; }
}