/* Ichiki Design Styles - Border Frame and Header */

:root {
    --ichiki-padding-outside: 20px;
    --ichiki-padding-content: 3.5rem;
    --ichiki-font-ibm: "IBM Plex Mono", monospace;
    --ichiki-font-size-base: clamp(14px, 1.1111111111vw, 16px);
    --ichiki-font-size-small: 0.75rem;
    --ichiki-font-size-base-en: 0.9375rem;
    --ichiki-font-size-h2: 3.5625rem;
    --ichiki-color-white-1: #fff;
    --ichiki-color-white-2: #f3f3ff;
    --ichiki-color-white-3: #a4a4a4;
    --ichiki-color-black-1: #000;
    --ichiki-color-black-2: #101016;
    --ichiki-color-black-3: #565656;
    --ichiki-bg: var(--ichiki-color-white-2);
    --ichiki-text: var(--ichiki-color-black-2);
    --ichiki-border: var(--ichiki-color-black-3);
    --ichiki-z-index-outer-frame: 2000;
    --ichiki-z-index-header: 1000;
    --ichiki-z-index-hamburger-menu: 6000;
    --ichiki-ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ichiki-duration-base-transform: 0.4s;
    --ichiki-duration-base-material: 0.15s;
}

@media screen and (max-width: 1024px) {
    :root {
        --ichiki-padding-content: 2rem;
    }
}

@media screen and (max-width: 768px) {
    :root {
        --ichiki-padding-outside: 15px;
        --ichiki-padding-content: 0.875rem;
        --ichiki-font-size-small: 0.625rem;
        --ichiki-font-size-base-en: 0.8125rem;
        --ichiki-font-size-h2: 2.625rem;
    }
}

/* Base Styles */
.ichiki-home {
    width: 100%;
    height: 100dvh; /* Use dynamic viewport height for iPhone safe area */
    min-height: 100vh; /* Fallback for browsers that don't support dvh */
    font-family: var(--ichiki-font-ibm), sans-serif;
    font-size: var(--ichiki-font-size-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow: hidden;
    scrollbar-width: none;
    -ms-overflow-style: none;
    background-color: var(--ichiki-bg);
    color: var(--ichiki-text);
}

.ichiki-home::-webkit-scrollbar {
    display: none;
}

/* Border Frame */
.ichiki-frame {
    position: fixed;
    width: 100vw;
    height: 100dvh; /* Use dynamic viewport height for iPhone safe area */
    min-height: 100vh; /* Fallback for browsers that don't support dvh */
    max-height: 100dvh; /* Prevent height from changing on scroll */
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: var(--ichiki-z-index-outer-frame);
    opacity: 0;
    transition: opacity var(--ichiki-duration-base-material) ease-out;
}

.ichiki-frame[data-op-end="true"] {
    opacity: 1;
}

.ichiki-frame svg {
    display: block;
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

.ichiki-frame rect {
    transform-origin: center;
}

.ichiki-rect-bg {
    transition: opacity var(--ichiki-duration-base-material) ease-out;
}

.ichiki-rect-radius {
    rx: 8px;
}

@media screen and (max-width: 768px) {
    .ichiki-rect-radius {
        rx: 6px;
    }
}

.ichiki-rect-radius {
    transition: height var(--ichiki-duration-base-transform) var(--ichiki-ease-out-expo);
}

/* Top Right Info */
.ichiki-right-top {
    position: fixed;
    top: 0;
    right: var(--ichiki-padding-outside);
    display: flex;
    align-items: center;
    height: var(--ichiki-padding-outside);
    gap: 1.5rem;
    z-index: calc(var(--ichiki-z-index-outer-frame) + 1);
    opacity: 0;
    transition: opacity var(--ichiki-duration-base-material) ease-out;
}

.ichiki-right-top[data-op-end="true"] {
    opacity: 1;
}

@media screen and (max-width: 768px) {
    .ichiki-right-top {
        gap: 1rem;
    }
}

.ichiki-theme {
    display: flex;
    align-items: center;
    height: 100%;
    gap: 0.375rem;
}

@media screen and (max-width: 768px) {
    .ichiki-theme {
        gap: 0.25rem;
    }
}

.ichiki-theme-btn {
    display: flex;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: solid 1px;
    cursor: pointer;
    background: transparent;
}

@media screen and (max-width: 768px) {
    .ichiki-theme-btn {
        width: 10px;
        height: 10px;
    }
}

.ichiki-theme-btn[data-color="light"] {
    background-color: var(--ichiki-color-white-2);
    border-color: var(--ichiki-color-black-3);
}

.ichiki-theme-btn[data-color="dark"] {
    background-color: var(--ichiki-color-black-2);
    border-color: var(--ichiki-color-black-2);
}

.ichiki-clock {
    width: fit-content;
    font-size: 13px;
    line-height: 1.2;
    color: var(--ichiki-text);
}

@media screen and (max-width: 768px) {
    .ichiki-clock {
        font-size: 12px;
    }
}

.ichiki-clock-colon {
    position: relative;
    top: -0.08em;
    animation: ichiki-tick 1s step-end infinite;
}

@keyframes ichiki-tick {
    0% { visibility: visible; }
    50% { visibility: hidden; }
    100% { visibility: visible; }
}

/* Hamburger Menu Button */
.ichiki-hamburger-btn {
    position: fixed;
    right: calc(var(--ichiki-padding-outside) + var(--ichiki-padding-content));
    bottom: calc(var(--ichiki-padding-outside) + var(--ichiki-padding-content));
    width: 2.5rem;
    height: 2.5rem;
    border: solid 1px var(--ichiki-border);
    border-radius: 0.25rem;
    background-color: var(--ichiki-bg);
    z-index: calc(var(--ichiki-z-index-hamburger-menu) + 1);
    touch-action: manipulation;
    transition: opacity var(--ichiki-duration-base-transform) var(--ichiki-ease-out-expo),
                transform var(--ichiki-duration-base-transform) var(--ichiki-ease-out-expo);
    cursor: pointer;
}

@media not all and (max-width: 768px) {
    .ichiki-hamburger-btn {
        display: none;
    }
}

.ichiki-hamburger-line {
    display: block;
    position: absolute;
    width: 1.125rem;
    height: 1px;
    background-color: var(--ichiki-border);
    inset: 0;
    margin: auto;
}

.ichiki-hamburger-line:nth-of-type(1) {
    transform: translate3d(0, -0.375rem, 0);
}

.ichiki-hamburger-line:nth-of-type(3) {
    transform: translate3d(0, 0.375rem, 0);
}

.ichiki-hamburger-btn[aria-expanded="true"] .ichiki-hamburger-line:nth-of-type(1) {
    transform: rotate(45deg);
}

.ichiki-hamburger-btn[aria-expanded="true"] .ichiki-hamburger-line:nth-of-type(2) {
    opacity: 0;
}

.ichiki-hamburger-btn[aria-expanded="true"] .ichiki-hamburger-line:nth-of-type(3) {
    transform: rotate(-45deg);
}

/* Hamburger Menu */
.ichiki-hamburger-menu {
    position: fixed;
    left: 0;
    bottom: 0;
    width: 100vw;
    height: 8.75rem;
    padding-top: 0.9375rem;
    padding-left: calc(var(--ichiki-padding-outside) + var(--ichiki-padding-content));
    padding-right: calc((var(--ichiki-padding-outside) + var(--ichiki-padding-content)) * 2 + 2.5rem);
    z-index: var(--ichiki-z-index-hamburger-menu);
    background-color: var(--ichiki-bg);
}

.ichiki-hamburger-menu[aria-hidden="true"] {
    opacity: 0;
    visibility: hidden;
}

@media not all and (max-width: 768px) {
    .ichiki-hamburger-menu {
        display: none;
    }
}

.ichiki-hamburger-list,
.ichiki-hamburger-sns {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.46875rem 1.25rem;
    padding-right: 1.25rem;
}

.ichiki-hamburger-link {
    display: flex;
    align-items: baseline;
    font-size: 0.8125rem;
    text-transform: uppercase;
    white-space: nowrap;
    color: var(--ichiki-text);
    text-decoration: none;
}

.ichiki-hamburger-sns .ichiki-hamburger-link {
    text-transform: none;
}

.ichiki-hamburger-line-divider {
    margin: 0.9375rem 0;
}

.ichiki-line {
    display: block;
    width: 100%;
    height: 1px;
    background-image: repeating-linear-gradient(
        to right,
        var(--ichiki-border) 0,
        var(--ichiki-border) 0.3125rem,
        transparent 0.3125rem,
        transparent 0.625rem
    );
    background-size: 0.625rem 1px;
    background-position: calc(50% - 0.15625rem) center;
    background-repeat: repeat-x;
    backface-visibility: hidden;
    transform: translateZ(0);
}

/* Main Wrapper */
.ichiki-wrapper {
    width: 100vw;
    height: 100dvh; /* Use dynamic viewport height for iPhone safe area */
    min-height: 100vh; /* Fallback for browsers that don't support dvh */
    overflow-y: auto;
    overscroll-behavior-y: none;
    opacity: 0;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.ichiki-wrapper::-webkit-scrollbar {
    display: none;
}

.ichiki-content {
    position: relative;
    width: 100%;
    overflow: clip;
}

.ichiki-main {
    width: 100%;
    transition: opacity 1ms linear;
    transform-origin: center 50svh;
}

/* Header */
.ichiki-header {
    position: absolute;
    top: var(--ichiki-padding-outside);
    left: 0;
    right: 0;
    margin: 0 auto;
    width: calc(100% - var(--ichiki-padding-outside) * 2);
    z-index: var(--ichiki-z-index-header);
}

.ichiki-logo {
    position: relative;
    display: block;
    margin-top: 0.9375rem;
    margin-left: 0.9375rem;
    width: 2.5rem;
    color: var(--ichiki-text);
    z-index: var(--ichiki-z-index-header);
}

@media screen and (max-width: 768px) {
    .ichiki-logo {
        width: 2rem;
    }
}

/* Menu */
.ichiki-menu {
    position: fixed;
    width: fit-content;
    height: 3rem;
    left: 0;
    right: 0;
    top: calc(var(--ichiki-padding-outside) + 1.40625rem);
    margin: 0 auto;
    border: solid 1px var(--ichiki-border);
    border-radius: 0.375rem;
    background-color: var(--ichiki-bg);
    z-index: var(--ichiki-z-index-header);
}

@media screen and (max-width: 768px) {
    .ichiki-menu {
        display: none;
    }
}

.ichiki-menu-list {
    height: 100%;
    display: flex;
    align-items: center;
    gap: 1.125rem;
    padding: 0.5rem;
}

.ichiki-menu-item {
    height: 100%;
    padding: 0 1rem;
}

.ichiki-menu-link {
    display: flex;
    align-items: center;
    height: 100%;
    font-size: var(--ichiki-font-size-base-en);
    text-transform: uppercase;
    color: var(--ichiki-text);
    text-decoration: none;
}

.ichiki-menu-current {
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 0;
    background-color: var(--ichiki-color-white-1);
    border-radius: 0.25rem;
    z-index: 1;
    pointer-events: none;
    mix-blend-mode: difference;
    transition: width var(--ichiki-duration-base-transform) var(--ichiki-ease-out-expo),
                height var(--ichiki-duration-base-transform) var(--ichiki-ease-out-expo),
                transform var(--ichiki-duration-base-transform) var(--ichiki-ease-out-expo);
}

/* SNS Links */
.ichiki-sns {
    position: fixed;
    display: flex;
    align-items: center;
    gap: 0.46875rem;
    right: calc(var(--ichiki-padding-outside) + 1.40625rem);
    top: calc(var(--ichiki-padding-outside) + 1.40625rem);
    z-index: var(--ichiki-z-index-header);
}

@media screen and (max-width: 1024px) {
    .ichiki-sns {
        flex-direction: column;
        align-items: flex-end;
    }
}

@media screen and (max-width: 768px) {
    .ichiki-sns {
        display: none;
    }
}

.ichiki-sns-link {
    display: block;
    border-radius: 100vh;
    color: var(--ichiki-text);
    background-color: var(--ichiki-bg);
    border: solid 1px var(--ichiki-border);
    transition: background-color var(--ichiki-duration-base-material) ease-out,
                color var(--ichiki-duration-base-material) ease-out;
    text-decoration: none;
}

@media (hover: hover) and (pointer: fine) {
    .ichiki-sns-link:hover {
        background-color: var(--ichiki-text);
        color: var(--ichiki-bg);
    }
}

.ichiki-sns-link[data-invert="true"] {
    border-color: var(--ichiki-text);
    background-color: var(--ichiki-text);
    color: var(--ichiki-bg);
}

@media (hover: hover) and (pointer: fine) {
    .ichiki-sns-link[data-invert="true"]:hover {
        background-color: var(--ichiki-bg);
        color: var(--ichiki-text);
    }
}

.ichiki-sns-inner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5em;
    padding: 0.25em 1.2em 0.3em;
}

.ichiki-sns-arrow {
    width: 0.8em;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 0.16em;
}

[target="_blank"] .ichiki-sns-arrow {
    transform: rotate(-45deg);
}

/* Page Content */
.ichiki-page {
    position: relative;
    width: 100%;
    padding: var(--ichiki-padding-outside) var(--ichiki-padding-outside) 0;
}

.ichiki-title {
    font-size: var(--ichiki-font-size-h2);
    text-transform: uppercase;
    margin: 0;
    padding: 9.84375rem var(--ichiki-padding-content) 3.75rem;
}

@media screen and (max-width: 768px) {
    .ichiki-title {
        padding: 6.09375rem var(--ichiki-padding-content) 3.75rem;
        font-size: var(--ichiki-font-size-h2);
    }
}

.ichiki-subtitle {
    font-size: var(--ichiki-font-size-base-en);
    text-transform: uppercase;
    padding: 0 var(--ichiki-padding-content);
    margin: 0;
}

.ichiki-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 3.75rem var(--ichiki-padding-content);
}