@font-face {
    font-family: 'Paragon';
    src: url('fonts/Paragon-Regular.otf') format('opentype');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'NV Nerivo';
    src: url('fonts/NVNerivoDemo-Light-BF69822565adc10.ttf') format('truetype');
    font-weight: 300;
    font-style: normal;
    font-display: swap;
}

:root {
    --bg-color: #0f0f0f;
    --text-color: #f0f4f6;
    --secondary-text: #adbac2;
    --line-color: #27272a;
    --paper: #fbf7ef;
    --paper-ink: #28231e;
    --accent: #4e895d;
    --font-main: 'Inter', sans-serif;
    --font-nerivo: 'NV Nerivo', 'Times New Roman', Times, serif;
    --header-height: 52px;
    --layout-max-width: 1440px;
    --header-glass-bg: rgba(15, 15, 15, 0.38);
    --header-glass-blur: 18px;
    --grid-line-color: rgba(255, 255, 255, 0.05);
}

[data-theme="light"] {
    --bg-color: #ffffff;
    --text-color: #21262a;
    --secondary-text: #4c555b;
    --line-color: #e4e4e7;
    --header-glass-bg: rgba(255, 255, 255, 0.46);
    --grid-line-color: rgba(0, 0, 0, 0.05);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100svh;
    background: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-main);
}

.grid-background {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    width: var(--layout-max-width);
    max-width: 100%;
    margin: 0 auto;
    left: 50%;
    transform: translateX(-50%);
    background-image:
        repeating-linear-gradient(to bottom, transparent, transparent 3px, var(--grid-line-color) 3px, var(--grid-line-color) 6px),
        repeating-linear-gradient(to bottom, transparent, transparent 3px, var(--grid-line-color) 3px, var(--grid-line-color) 6px),
        repeating-linear-gradient(to bottom, transparent, transparent 3px, var(--grid-line-color) 3px, var(--grid-line-color) 6px),
        repeating-linear-gradient(to bottom, transparent, transparent 3px, var(--grid-line-color) 3px, var(--grid-line-color) 6px),
        repeating-linear-gradient(to bottom, transparent, transparent 3px, var(--grid-line-color) 3px, var(--grid-line-color) 6px);
    background-size: 1px 100%, 1px 100%, 1px 100%, 1px 100%, 1px 100%;
    background-position: 0 0, 25% 0, 50% 0, 75% 0, 100% 0;
    background-repeat: no-repeat;
}

.header,
.creator-page {
    position: relative;
    z-index: 1;
}

button,
input,
textarea {
    font: inherit;
}

.header-bg {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: var(--header-glass-bg);
    backdrop-filter: blur(var(--header-glass-blur)) saturate(1.25);
    -webkit-backdrop-filter: blur(var(--header-glass-blur)) saturate(1.25);
    z-index: 100;
    pointer-events: none;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    z-index: 101;
    display: flex;
    align-items: center;
}

.container {
    max-width: var(--layout-max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.nav {
    display: flex;
    align-items: center;
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    margin-right: 24px;
    color: var(--text-color);
}

.logo-img {
    display: block;
    width: 32px;
    height: 32px;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
}

.nav-links a:hover {
    opacity: 0.7;
}

.creator-secondary,
.creator-primary {
    min-height: 46px;
    border: 1.5px solid var(--text-color);
    border-radius: 999px;
    padding: 0.78rem 1.1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    color: var(--text-color);
    background: transparent;
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 700;
    line-height: 1;
    cursor: pointer;
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.08);
    transition: transform 0.2s ease, border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.creator-secondary ion-icon,
.creator-primary ion-icon {
    width: 1.15rem;
    height: 1.15rem;
    flex: 0 0 auto;
}

.creator-primary {
    border-color: var(--text-color);
    background: var(--text-color);
    color: var(--bg-color);
    box-shadow: 0 14px 30px rgba(0, 0, 0, 0.14);
}

.creator-secondary:hover,
.creator-primary:hover {
    transform: translateY(-2px);
    border-color: var(--text-color);
    box-shadow: 0 18px 34px rgba(0, 0, 0, 0.16);
}

.creator-secondary:hover {
    background: color-mix(in srgb, var(--text-color) 7%, transparent);
}

.creator-primary:hover {
    background: color-mix(in srgb, var(--text-color) 88%, var(--bg-color));
}

.preview-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.8rem;
    flex-wrap: wrap;
    width: min(100%, 520px);
    margin-top: 0.35rem;
}

.preview-actions .creator-secondary,
.preview-actions .creator-primary {
    flex: 1 1 0;
    min-width: 0;
}

.postcard-mobile-unavailable {
    display: none;
}

.creator-page {
    width: min(1440px, 100%);
    margin: 0 auto;
    padding: calc(var(--header-height) + clamp(1.25rem, 3vw, 3rem)) clamp(1rem, 4vw, 2rem) clamp(3rem, 7vw, 6rem);
}

.creator-builder {
    min-height: calc(100svh - var(--header-height) - 4rem);
    display: grid;
    grid-template-columns: minmax(280px, 0.74fr) minmax(520px, 1.26fr);
    gap: clamp(1.25rem, 2.5vw, 2rem) clamp(2rem, 4vw, 4rem);
    align-items: start;
}

.creator-form {
    display: grid;
    gap: 0;
    max-height: calc(100svh - var(--header-height) - clamp(7rem, 12vw, 12rem));
    overflow: auto;
    padding-right: 0.5rem;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.creator-form::-webkit-scrollbar {
    display: none;
}

.creator-heading {
    grid-column: 1 / -1;
    display: grid;
    gap: 0.35rem;
}

.creator-kicker {
    display: block;
    margin: 0;
    color: var(--text-color);
    font-family: 'Montserrat', var(--font-main);
    font-size: clamp(0.78rem, 1.1vw, 1.25rem);
    font-weight: 400;
    line-height: 1;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.creator-heading h1,
.wall-heading h2 {
    margin: 0;
    color: var(--text-color);
    font-family: var(--font-nerivo);
    font-weight: 300;
    letter-spacing: 0;
    line-height: 1.05;
}

.creator-heading h1 {
    max-width: 100%;
    font-size: clamp(2.1rem, 4.8vw, 4.8rem);
}

.creator-field {
    display: grid;
    gap: 0.55rem;
}

.creator-field span,
.creator-choice-group legend {
    color: var(--text-color);
    font-size: 0.95rem;
    font-weight: 800;
}

.creator-choice-group legend {
    margin-bottom: 12px;
}

.creator-choice-note {
    color: var(--secondary-text);
    font-weight: 400;
}

.creator-field em {
    margin-left: 0.35rem;
    border-radius: 999px;
    padding: 0.12rem 0.45rem;
    background: color-mix(in srgb, var(--secondary-text) 14%, transparent);
    color: var(--secondary-text);
    font-size: 0.74rem;
    font-style: normal;
    font-weight: 700;
}

.creator-field input,
.creator-field textarea {
    width: 100%;
    border: 2px solid var(--text-color);
    border-radius: 16px;
    padding: 0.85rem 0.95rem;
    background: transparent;
    color: var(--text-color);
    outline: none;
    resize: vertical;
    box-shadow: none;
}

.creator-field textarea {
    min-height: 120px;
}

.creator-field input:focus,
.creator-field textarea:focus {
    border-color: var(--text-color);
    background: transparent;
    box-shadow: none;
    outline: none;
}

.creator-field input::placeholder,
.creator-field textarea::placeholder {
    color: color-mix(in srgb, var(--secondary-text) 72%, transparent);
}

.creator-field small {
    justify-self: end;
    color: var(--secondary-text);
    font-size: 0.8rem;
}

.creator-choice-group {
    display: grid;
    gap: 1rem;
    border: 0;
    padding: 0;
    margin: 0;
}

.creator-choice-group + .creator-choice-group {
    margin-top: 0.35rem;
}

.creator-accordion {
    border-top: 1px dashed var(--line-color);
}

.creator-accordion:last-of-type {
    border-bottom: 1px dashed var(--line-color);
}

.creator-accordion-header {
    width: 100%;
    min-height: 72px;
    border: 0;
    padding: 1rem 0;
    background: transparent;
    color: var(--text-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    text-align: left;
    cursor: pointer;
}

.creator-accordion-title {
    font-family: 'Montserrat', var(--font-main);
    font-size: clamp(0.78rem, 1.1vw, 1.25rem);
    font-weight: 400;
    letter-spacing: 0.02em;
    line-height: 1;
    text-transform: uppercase;
}

.creator-accordion-icon {
    position: relative;
    width: 38px;
    height: 38px;
    border-radius: 999px;
    background: var(--text-color);
    flex: 0 0 auto;
    transition: transform 0.24s ease, opacity 0.2s ease, background-color 0.2s ease;
}

.creator-accordion-header:hover .creator-accordion-icon {
    opacity: 0.82;
}

.creator-accordion-icon::before,
.creator-accordion-icon::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    border-radius: 999px;
    background: var(--bg-color);
    transform: translate(-50%, -50%);
    transition: opacity 0.26s ease, transform 0.26s ease;
}

.creator-accordion-icon::before {
    width: 14px;
    height: 2px;
}

.creator-accordion-icon::after {
    width: 2px;
    height: 14px;
}

.creator-accordion-header[aria-expanded="true"] .creator-accordion-icon::after {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(90deg);
}

.creator-accordion-content {
    display: grid;
    grid-template-rows: 0fr;
    overflow: hidden;
    transition: grid-template-rows 0.42s cubic-bezier(0.4, 0, 0.2, 1);
}

.creator-accordion-content.is-expanded {
    grid-template-rows: 1fr;
}

.creator-accordion-inner {
    min-height: 0;
    overflow: hidden;
    display: grid;
    gap: 1.25rem;
    padding-bottom: 0;
    transition: padding-bottom 0.42s cubic-bezier(0.4, 0, 0.2, 1);
}

.creator-accordion-content.is-expanded .creator-accordion-inner {
    padding-bottom: 1.35rem;
}

.mark-options,
.front-image-options {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.7rem;
}

.stamp-option {
    flex: 0 0 92px;
    width: 92px;
    aspect-ratio: 0.78;
    border: 1px solid transparent;
    border-radius: 8px;
    padding: 0;
    background: transparent;
    display: grid;
    place-items: center;
    cursor: pointer;
}

.stamp-option-round {
    aspect-ratio: 1;
}

.stamp-option img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.mark-option {
    width: 44px;
    height: 44px;
    border: 1px solid var(--line-color);
    border-radius: 999px;
    background: transparent;
    color: var(--text-color);
    font-size: 1.35rem;
    line-height: 1;
    cursor: pointer;
}

.mark-option-year {
    display: inline-grid;
    place-content: center;
    gap: 0;
    font-family: 'Montserrat', var(--font-main);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0;
    line-height: 0.9;
}

.mark-option-icon {
    display: inline-grid;
    place-items: center;
}

.mark-option-icon i,
.mark-option-icon svg {
    width: 16px;
    height: 16px;
    display: block;
    color: currentColor;
}

.mark-option-icon svg path,
.mark-option-icon svg circle,
.mark-option-icon svg line {
    stroke: currentColor;
    fill: none;
}

.stamp-option:hover,
.mark-option:hover {
    transform: translateY(-2px);
}

.stamp-option.is-selected,
.mark-option.is-selected {
    border-color: transparent;
    box-shadow: none;
    transform: translateY(-2px);
}

.stamp-option.is-selected img {
    filter: drop-shadow(0 10px 18px rgba(78, 137, 93, 0.28));
}

.mark-option.is-selected {
    background: color-mix(in srgb, var(--accent) 14%, transparent);
    color: var(--accent);
}

.stamp-options,
.front-image-options {
    display: flex;
    flex-wrap: nowrap;
    gap: 0.8rem;
    min-width: 0;
    padding: 0 0 0.35rem;
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    scroll-snap-type: x proximity;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.stamp-options {
    align-items: center;
}

.front-image-options {
    align-items: stretch;
}

.stamp-options::-webkit-scrollbar,
.front-image-options::-webkit-scrollbar {
    display: none;
}

.stamp-carousel,
.front-image-carousel {
    display: grid;
    gap: 0.65rem;
    min-width: 0;
}

.front-image-option {
    flex: 0 0 min(42%, 180px);
    aspect-ratio: 1.40625;
    border: 0;
    border-radius: 10px;
    padding: 0;
    background: color-mix(in srgb, var(--text-color) 6%, transparent);
    cursor: pointer;
    overflow: hidden;
    transition: transform 0.2s ease, opacity 0.2s ease, box-shadow 0.2s ease;
}

.front-image-option img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.front-image-option[data-front-position="center top"] img {
    object-position: center top;
}

.front-image-option:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

.front-image-option.is-selected {
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.16);
    transform: translateY(-2px);
}

.stamp-dots,
.front-image-dots {
    display: flex;
    justify-content: center;
    gap: 0.38rem;
}

.stamp-dot,
.front-image-dot {
    width: 6px;
    height: 6px;
    border-radius: 999px;
    background: color-mix(in srgb, var(--text-color) 22%, transparent);
    transition: width 0.2s ease, background-color 0.2s ease;
}

.stamp-dot.is-active,
.front-image-dot.is-active {
    width: 16px;
    background: var(--text-color);
}

.font-options {
    display: grid;
    gap: 0.65rem;
}

.font-option {
    width: 100%;
    border: 1px solid var(--line-color);
    border-radius: 10px;
    padding: 0.85rem 1rem;
    background: transparent;
    color: var(--text-color);
    text-align: left;
    font-size: 1.05rem;
    cursor: pointer;
}

.font-option[data-font="script"] {
    font-family: 'Homemade Apple', cursive;
}

.font-option[data-font="serif"] {
    font-family: var(--font-nerivo);
    font-size: 1.25rem;
}

.font-option.is-selected,
.font-option:hover {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 14%, transparent);
}

.creator-status {
    order: 4;
    min-height: 1.4rem;
    margin: 0;
    color: var(--secondary-text);
    font-size: 0.9rem;
}

.creator-accordion-decoration {
    order: 1;
}

.creator-accordion-text {
    order: 2;
}

.creator-accordion-typography {
    order: 3;
}

.preview-column {
    position: sticky;
    top: calc(var(--header-height) + 1.5rem);
    display: grid;
    justify-items: center;
    gap: 0.85rem;
    align-self: start;
}

.preview-card {
    width: min(100%, 820px, calc(100svh * 1.03));
    aspect-ratio: 1.40625;
    border: 0;
    padding: 0;
    background: transparent;
    perspective: 1400px;
    cursor: pointer;
}

.preview-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    display: block;
    transform-style: preserve-3d;
    transition: transform 0.72s cubic-bezier(0.22, 1, 0.36, 1);
}

.preview-card.is-flipped .preview-card-inner {
    transform: rotateY(180deg);
}

.preview-face {
    position: absolute;
    inset: 0;
    display: block;
    border-radius: 7px;
    overflow: hidden;
    backface-visibility: hidden;
    background:
        linear-gradient(rgba(255, 252, 246, 0.88), rgba(255, 252, 246, 0.88)),
        url('assets/letter/paper-texture-2-web.jpg') center / cover;
    color: var(--paper-ink);
    box-shadow: 0 24px 54px rgba(0, 0, 0, 0.18);
}

.preview-face-front {
    padding: clamp(1.1rem, 3vw, 2rem);
}

.preview-face-back {
    transform: rotateY(180deg);
    padding: clamp(0.85rem, 2.4vw, 1.55rem);
}

.preview-front-image-frame {
    position: absolute;
    inset: clamp(0.55rem, 1.7vw, 1.1rem) clamp(0.85rem, 2.4vw, 1.55rem);
    display: block;
    overflow: hidden;
    border-radius: 3px;
    background: #f7efe2;
    box-shadow: inset 0 0 0 1px rgba(39, 34, 29, 0.08);
}

.preview-front-image {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform-origin: center;
    transition: transform 0.2s ease;
}

.preview-front-image.is-hidden {
    display: none;
}

.preview-front-placeholder {
    position: absolute;
    inset: 0;
    display: grid;
    place-content: center;
    gap: 0.2rem;
    padding: 1.5rem;
    color: #2f2a25;
    text-align: center;
    background:
        linear-gradient(rgba(255, 252, 246, 0.76), rgba(255, 252, 246, 0.76)),
        url('assets/letter/paper-texture-2-web.jpg') center / cover;
}

.preview-front-placeholder span:first-child {
    font-family: var(--font-nerivo);
    font-size: clamp(2.4rem, 6vw, 5rem);
    line-height: 0.95;
}

.preview-front-placeholder span:last-child {
    font-family: var(--font-nerivo);
    font-size: clamp(1.15rem, 2.7vw, 2.2rem);
    line-height: 1;
}

.preview-front-placeholder.is-hidden {
    display: none;
}

.preview-label {
    position: absolute;
    top: 8%;
    left: 50%;
    transform: translateX(-50%);
    color: #7d756a;
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.preview-stamp {
    position: absolute;
    top: 9%;
    right: 7%;
    width: 14%;
    height: auto;
}

.preview-stamp.is-hidden {
    display: none;
}

.preview-stamp-placeholder {
    position: absolute;
    top: 9%;
    right: 7%;
    width: 14%;
    aspect-ratio: 0.82;
    border: 1.5px dashed rgba(39, 34, 29, 0.38);
    border-radius: 3px;
    background:
        radial-gradient(circle, rgba(39, 34, 29, 0.18) 0 1px, transparent 1.5px) center / 12px 12px;
}

.preview-stamp-placeholder.is-hidden {
    display: none;
}

.preview-to,
.preview-message,
.preview-from {
    font-family: var(--font-nerivo);
}

.preview-to {
    position: absolute;
    top: 43.5%;
    left: 57%;
    right: 9%;
    font-size: clamp(0.9rem, 1.7vw, 1.18rem);
    line-height: 1.4;
    text-align: left;
}

.preview-to strong,
.preview-from strong {
    font-weight: inherit;
}

.preview-mark {
    position: absolute;
    left: 9%;
    top: 67%;
    color: var(--accent);
    font-size: clamp(2.5rem, 6.8vw, 4.35rem);
    opacity: 0.84;
}

.preview-divider {
    position: absolute;
    top: 28%;
    bottom: 14%;
    left: 50%;
    border-left: 1px solid rgba(39, 34, 29, 0.35);
}

.preview-lines {
    position: absolute;
    top: 47%;
    right: 7%;
    width: 38%;
    height: 34%;
    background: repeating-linear-gradient(to bottom, rgba(39, 34, 29, 0.23) 0 1px, transparent 1px 25%);
}

.preview-message {
    position: absolute;
    top: 35%;
    left: 9%;
    width: 35%;
    color: #2f2a25;
    font-size: clamp(1rem, 2.35vw, 1.48rem);
    line-height: 1.55;
    text-align: left;
    overflow-wrap: anywhere;
}

.preview-message[data-length="medium"] {
    font-size: clamp(0.86rem, 1.95vw, 1.2rem);
}

.preview-message[data-length="long"] {
    font-size: clamp(0.76rem, 1.62vw, 1rem);
}

.preview-from {
    position: absolute;
    right: 9%;
    top: 69%;
    width: 34%;
    font-size: clamp(0.82rem, 1.6vw, 1.05rem);
    text-align: left;
}

.preview-card-inner[data-font="serif"] .preview-to,
.preview-card-inner[data-font="serif"] .preview-message,
.preview-card-inner[data-font="serif"] .preview-from {
    font-family: var(--font-nerivo);
}

.preview-card-inner[data-font="script"] .preview-to,
.preview-card-inner[data-font="script"] .preview-message,
.preview-card-inner[data-font="script"] .preview-from {
    font-family: 'Homemade Apple', cursive;
}

.preview-card-inner[data-font="clean"] .preview-to,
.preview-card-inner[data-font="clean"] .preview-message,
.preview-card-inner[data-font="clean"] .preview-from {
    font-family: var(--font-main);
}

.preview-hint {
    margin: 0;
    color: var(--secondary-text);
    font-size: 0.9rem;
}

.wall-section {
    display: grid;
    gap: clamp(1.5rem, 3vw, 2.5rem);
    padding-top: clamp(4rem, 9vw, 7rem);
}

.wall-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 1rem;
}

.wall-heading h2 {
    max-width: 10ch;
    font-size: clamp(2.4rem, 6vw, 5.4rem);
}

.wall-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(1rem, 2vw, 1.5rem);
}

.wall-empty {
    grid-column: 1 / -1;
    margin: 0;
    color: var(--secondary-text);
}

.wall-card {
    aspect-ratio: 1.58;
    border-radius: 7px;
    padding: clamp(0.95rem, 2vw, 1.35rem);
    background:
        linear-gradient(rgba(255, 252, 246, 0.9), rgba(255, 252, 246, 0.9)),
        url('assets/letter/paper-texture-2-web.jpg') center / cover;
    color: var(--paper-ink);
    box-shadow: 0 18px 44px rgba(0, 0, 0, 0.12);
    position: relative;
    overflow: hidden;
}

.wall-card img {
    position: absolute;
    top: 10%;
    right: 8%;
    width: 16%;
}

.wall-card-to,
.wall-card-message,
.wall-card-from {
    display: block;
    max-width: 62%;
    overflow-wrap: anywhere;
}

.wall-card-to {
    margin-bottom: 0.75rem;
    color: #6f675d;
    font-size: 0.82rem;
}

.wall-card-message {
    font-size: clamp(0.95rem, 1.5vw, 1.25rem);
    line-height: 1.45;
}

.wall-card-from {
    position: absolute;
    left: clamp(0.95rem, 2vw, 1.35rem);
    bottom: clamp(0.95rem, 2vw, 1.35rem);
    color: #6f675d;
    font-size: 0.82rem;
}

.wall-card[data-font="script"] .wall-card-message,
.wall-card[data-font="script"] .wall-card-from {
    font-family: 'Homemade Apple', cursive;
}

.wall-card[data-font="serif"] .wall-card-message,
.wall-card[data-font="serif"] .wall-card-from {
    font-family: var(--font-nerivo);
}

@media (max-width: 900px) {
    .creator-builder {
        grid-template-columns: 1fr;
        min-height: 0;
    }

    .creator-form {
        max-height: none;
        overflow: visible;
        padding-right: 0;
    }

    .preview-column {
        order: -1;
        position: static;
    }

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

@media (max-width: 768px) {
    .creator-builder {
        display: none;
    }

    .postcard-mobile-unavailable {
        min-height: calc(100svh - var(--header-height) - 6rem);
        display: grid;
        place-content: center;
        justify-items: center;
        gap: 0.75rem;
        text-align: center;
    }

    .postcard-mobile-unavailable h1 {
        margin: 0;
        color: var(--text-color);
        font-family: var(--font-nerivo);
        font-size: clamp(2.4rem, 12vw, 4rem);
        font-weight: 300;
        line-height: 1;
    }

    .postcard-mobile-unavailable p {
        margin: 0;
        color: var(--secondary-text);
        font-size: 1rem;
    }

    .postcard-mobile-unavailable a {
        margin-top: 0.5rem;
        color: var(--text-color);
        font-weight: 700;
        text-decoration: none;
        border-bottom: 1px solid currentColor;
    }
}

@media (max-width: 640px) {
    .nav-links {
        display: none;
    }

    .container {
        padding: 0 1rem;
    }

    .preview-actions,
    .wall-heading {
        align-items: stretch;
        flex-direction: column;
    }

    .creator-secondary,
    .creator-primary {
        width: 100%;
    }

    .wall-grid {
        grid-template-columns: 1fr;
    }
}