/*
 * VK
*/

@import url("../fonts/fonts.css");

:root {
    --font-title: "Montserrat", system-ui, sans-serif;
    --font-mono: "IoseVKa", "PT Mono", monospace;
    --page-margin: 3rem;
    --v-spacing: 2rem;
}

* {
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    height: 100%;
}

body {
    height: 100%;
    margin: 0;
    background-color: var(--bg);
    color: var(--txt);
    font-family: var(--font-mono);
    -webkit-user-select: none;
    user-select: none;
}

.page-container {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: 0 var(--page-margin);
}

/* Banner */
.banner {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--acc);
    overflow: hidden;
    flex-shrink: 0;
    mask-image: linear-gradient(
        to right,
        transparent,
        black var(--page-margin),
        black calc(100% - var(--page-margin)),
        transparent
    );
    -webkit-mask-image: linear-gradient(
        to right,
        transparent,
        black var(--page-margin),
        black calc(100% - var(--page-margin)),
        transparent
    );
}

.banner-track {
    display: flex;
    width: fit-content;
    will-change: transform;
    animation: marquee var(--marquee-duration) linear infinite;
    /* gap: 2rem; */
}

.banner-group {
    display: flex;
    flex-shrink: 0;
    gap: 2rem;
}

.banner-group span {
    white-space: nowrap;
    color: var(--txt);
    font-family: var(--font-title);
    font-size: 0.625rem;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    padding: 0 1rem;
}

@keyframes marquee {
    from {
        transform: translateX(0%);
    }
    to {
        transform: translateX(calc(-1 * var(--marquee-width)));
    }
}

/* Header 'n Footer */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--v-spacing);
    flex-shrink: 0;
}

.whoami .name {
    font-family: var(--font-title);
    font-size: 1.6rem;
    font-weight: 700;
}

.whoami .degree {
    font-size: 1rem;
    opacity: 0.7;
}

.lang-switch {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.lang-switch button {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--acc);
    font-size: 0.8rem;
    text-transform: uppercase;
}

.lang-divider {
    width: 100%;
    height: 1px;
    background-color: var(--acc);
    opacity: 0.3;
}

.footer {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding-bottom: var(--v-spacing);
    flex-shrink: 0;
}

#theme-toggle {
    background: transparent;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--acc);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border-color: var(--acc);
    display: grid;
    place-items: center;
    transition:
        transform 0.2s ease,
        filter 0.2s ease;
}

#theme-toggle:active {
    transform: scale(0.95);
    filter: brightness(0.9);
}

/* Body */
.main {
    flex-grow: 1;
    display: flex;
    align-items: center;
    gap: 3rem;
    padding: var(--v-spacing) 0;
}

.icon-nav {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.icon-button {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--txt);
    background: transparent;
    color: var(--txt);
    cursor: pointer;
    display: grid;
    place-items: center;
    padding: 0;
    transition:
        background-color 0.2s,
        color 0.2s;
}

.icon-button.active {
    background-color: var(--txt);
    color: var(--bg);
}

.icon-button svg {
    width: 1.25rem;
    height: 1.25rem;
    fill: currentColor;
}

.content-panels-wrapper {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 250px;
}

.content-panel {
    display: none;
    line-height: 1.6;
    font-size: 0.9rem;
}

.content-panel a {
    color: var(--acc);
    text-decoration: underline;
    text-underline-offset: 4px;
    transition: color 0.2s;
}

.content-panel.active {
    display: block;
    animation: slide-up-fade 0.5s cubic-bezier(0.25, 1, 0.5, 1) forwards;
}

.content-panel.exiting {
    display: block;
    animation: fade-out 0.4s ease-out forwards;
}

@keyframes slide-up-fade {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fade-out {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}

.content-panel h2 {
    font-size: 1.1rem;
    margin: 0 0 0.5rem 0;
}

.content-panel p {
    margin: 0;
}

.qr-container {
    margin-top: 0.75rem;
}

.qr-container img {
    width: 150px;
    height: 150px;
    display: block;
    border-radius: 0.5rem;
    border: 2px solid var(--acc);
}

/* Welcome screen */
.welcome-screen {
    position: fixed;
    inset: 0;
    background-color: var(--bg);
    color: var(--txt);
    display: grid;
    place-items: center;
    z-index: 9999;
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.welcome-screen.hidden {
    opacity: 0;
    pointer-events: none;
}

.welcome-content {
    text-align: center;
    font-family: var(--font-title);
    letter-spacing: 0.08em;
    padding: 1.5rem;
    transition:
        opacity 0.3s ease-out,
        transform 0.3s ease-out;
}

.welcome-content.exiting {
    opacity: 0;
    transform: scale(0.95);
}

.welcome-heading {
    font-size: clamp(1.5rem, 5vw, 2.2rem);
    font-weight: 600;
    line-height: 1.4;
}

#welcome-anim {
    display: block;
    overflow: hidden;
}

.welcome-line {
    display: block;
    opacity: 0;
    transform: translateY(100%);
    animation: slide-up 0.8s cubic-bezier(0.25, 1, 0.5, 1) forwards;
}

#welcome-anim.no-animation .welcome-line {
    opacity: 1;
    transform: translateY(0);
    animation: none;
}

@keyframes slide-up {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@media (prefers-reduced-motion: reduce) {
    .welcome-screen {
        transition: none;
    }
    .availability-track {
        animation: none;
    }
}

/* Loader */
.page-loader {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: grid;
    place-items: center;
    background-color: rgba(var(--bg-rgb), 0.5);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    opacity: 1;
    transition: opacity 0.3s ease;
}

.page-loader.hidden {
    opacity: 0;
    pointer-events: none;
}

.loader,
.loader::before,
.loader::after {
    border-width: 2px;
    border-style: solid;
    border-radius: 10px;
    animation: rotate 3s linear infinite;
}

.loader {
    position: relative;
    width: 40px;
    height: 40px;
    border-color: var(--txt);
}

.loader::before,
.loader::after {
    position: absolute;
    content: "";
}

.loader::before {
    border-color: var(--acc);
    width: 120%;
    height: 120%;
    animation-delay: 0.2s;
}

.loader::after {
    border-color: var(--acc);
    width: 140%;
    height: 140%;
    opacity: 0.6;
    animation-delay: 0.4s;
}

@keyframes rotate {
    to {
        transform: rotate(360deg);
    }
}

/* Theme transition */
.theme-transition {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 10001;
    overflow: hidden;
}

.theme-transition-line {
    position: absolute;
    left: 0;
    width: 100%;
    height: 33.4vh;
    transform: translateY(100vh);
}

.theme-transition.animate .theme-transition-line {
    animation: move-up 0.8s cubic-bezier(0.33, 1, 0.68, 1);
}

.theme-transition-line:nth-child(1) {
    background-color: var(--line-1-color);
    animation-delay: 0s;
}
.theme-transition-line:nth-child(2) {
    background-color: var(--line-2-color);
    animation-delay: 0.05s;
}
.theme-transition-line:nth-child(3) {
    background-color: var(--line-3-color);
    animation-delay: 0.1s;
}

@keyframes move-up {
    from {
        transform: translateY(100vh);
    }
    to {
        transform: translateY(-100vh);
    }
}

/* Hover styles */
@media (hover: hover) and (pointer: fine) {
    #theme-toggle:hover {
        filter: brightness(1.2);
    }

    .icon-button:not(.active):hover {
        background-color: rgba(var(--txt-rgb), 0.1);
        border-color: var(--txt);
    }

    .content-panel a:hover {
        color: var(--txt);
    }

    .lang-switch button:hover {
        filter: brightness(1.2);
    }
}

/* Larger screens */
@media screen and (min-width: 1024px) {
    html {
        font-size: 18px;
    }

    .page-container {
        max-width: 1200px;
        margin: 0 auto;
        --page-margin: 4rem;
    }

    .banner-track {
        animation-duration: 40s;
    }

    .banner-group span {
        padding: 0 3rem;
    }

    .whoami .name {
        font-size: 2.2rem;
    }

    .whoami .degree {
        font-size: 1.1rem;
    }

    .main {
        gap: 5rem;
    }

    .icon-button {
        width: 50px;
        height: 50px;
    }

    .icon-button svg {
        width: 1.2rem;
        height: 1.2rem;
    }

    .content-panels-wrapper {
        text-align: center;
    }

    .content-panel {
        font-size: 1.2rem;
        max-width: 500px;
        margin: 0 auto;
        text-align: left;
    }

    #panel-qr {
        align-items: center;
        justify-content: center;
        gap: 6rem;
    }

    #panel-qr.active {
        display: flex;
        animation: slide-up-fade 0.5s cubic-bezier(0.25, 1, 0.5, 1) forwards;
    }

    #panel-qr.exiting {
        display: flex;
        animation: fade-out 0.4s ease-out forwards;
    }

    #panel-qr h2 {
        margin: 0;
        font-size: 1.2rem;
    }

    .qr-container {
        margin-top: 0;
    }

    .qr-container img {
        width: 180px;
        height: 180px;
    }

    #theme-toggle {
        width: 50px;
        height: 50px;
    }
}