:root {
    --bg-color: #2b2b2b;
    --bg-color-darker: #1e1e1e;
    --line-color: #ffffff33;
    --accent-color: #bf6149;
    --text-main: #ffffff;
    --text-muted: #a0a0a0;
    --header-height: 60px;
}
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    cursor: crosshair !important;
}

.panel:not(.active-panel):hover {
    background-color: var(--bg-color-darker);
    cursor: pointer;
}
body {
    background: var(--bg-color);
    color: var(--text-main);
    font-family: 'JetBrains Mono', monospace;
    overflow: hidden;
    height: 100vh;
    width: 100vw;
}
header {
    display: flex;
    align-items: center;
    height: var(--header-height);
    border-bottom: 1px solid var(--line-color);
    position: relative;
    z-index: 100;
}
.cursor {
    display: flex;
    align-items: center;
    padding: 0 24px;
    font-size: 16px;
    flex-shrink: 0;
}
.cursor span:after{
    content: "_";
    opacity: 0;
    animation: cursor 1s infinite;
}
@keyframes cursor {
    0%, 40%, 100% { opacity: 0; }
    50%, 90% { opacity: 1; }
}
.main-nav {
    display: flex;
    margin-left: 10%;
}
.main-nav a {
    display: flex;
    align-items: center;
    padding: 0 20px;
    color: var(--text-main);
    text-decoration: none;
    font-size: 20px;
    border-bottom: 2px solid transparent;
    transition: color 0.2s ease, border-color 0.2s ease;
    height: var(--header-height);
}
.main-nav a:hover,
.main-nav a.active {
    color: var(--accent-color);
}
.main-nav a.active {
    border-bottom: 2px solid var(--accent-color);
}

.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 36px;
    height: 36px;
    margin-left: auto;
    margin-right: 20px;
    background: transparent;
    border: none;
    padding: 4px;
}
.hamburger span {
    display: block;
    height: 2px;
    background: var(--text-main);
    transition: transform 0.3s ease, opacity 0.3s ease;
    transform-origin: center;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-color-darker);
    border-bottom: 1px solid var(--line-color);
    z-index: 99;
    flex-direction: column;
    padding: 12px 0;
}
.mobile-nav.open {
    display: flex;
}
.mobile-nav a {
    display: block;
    padding: 14px 24px;
    color: var(--text-main);
    text-decoration: none;
    font-size: 16px;
    border-left: 2px solid transparent;
    transition: color 0.2s ease, border-color 0.2s ease;
}
.mobile-nav a:hover,
.mobile-nav a.active {
    color: var(--accent-color);
    border-left: 2px solid var(--accent-color);
}

.grid-container {
    display: grid;
    height: calc(100vh - var(--header-height));
    width: 100%;
    background-color: var(--line-color);
    gap: 1px;
    grid-template-areas:
        "about projects"
        "contact technologies";
    transition: grid-template-columns 0.7s cubic-bezier(0.4, 0, 0.2, 1),
    grid-template-rows 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}
.panel {
    background-color: var(--bg-color);
    position: relative;
    overflow: hidden;
    transition: background-color 0.2s ease;
}
.panel-content {
    padding: 3rem;
    height: 100%;
    width: 100%;
    overflow-y: auto;
}
.panel-content::-webkit-scrollbar { display: none; }
.panel-content { -ms-overflow-style: none; scrollbar-width: none; }
#panel-projects { grid-area: projects; }
#panel-technologies { grid-area: technologies; }
#panel-about { grid-area: about; }
#panel-contact { grid-area: contact; }

.grid-container[data-state="about"] {
    grid-template-columns: 85fr 15fr;
    grid-template-rows: 75fr 25fr;
}
.grid-container[data-state="about"] .about-div {
    display: flex;
}
.grid-container[data-state="projects"] {
    grid-template-columns: 15fr 85fr;
    grid-template-rows: 85fr 15fr;
}
.grid-container[data-state="projects"] #panel-projects .grid{
    display: grid;
}
.grid-container[data-state="technologies"] {
    grid-template-columns: 15fr 85fr;
    grid-template-rows: 15fr 85fr;
}
.grid-container[data-state="technologies"] #panel-technologies .grid{
    display: grid;
}
.grid-container[data-state="contact"] {
    grid-template-columns: 85fr 15fr;
    grid-template-rows: 15fr 85fr;
}
.grid-container[data-state="contact"] .contact-div{
    display: flex;
}
.grid-container[data-state="projects"] #panel-projects,
.grid-container[data-state="about"] #panel-about,
.grid-container[data-state="technologies"] #panel-technologies,
.grid-container[data-state="contact"] #panel-contact {
    background-color: var(--bg-color);
    cursor: default;
}
.grid-container[data-state="projects"] #panel-projects,
.grid-container[data-state="about"] #panel-about,
.grid-container[data-state="technologies"] #panel-technologies,
.grid-container[data-state="contact"] #panel-contact {
    cursor: default !important;
}

input {
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--line-color);
    color: white;
    width: 100%;
    outline: none;
    font-family: inherit;
    padding-bottom: 4px;
    transition: border-color 0.2s ease;
}
input:focus {
    border-bottom-color: var(--accent-color);
}
input::placeholder { color: var(--text-muted); }

.contact-div {
    display: none;
    gap: 2rem;
    align-items: center;
    margin-top: 3rem;
}
.form-div {
    border: 1px solid var(--line-color);
    width: 50%;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}
.form-row {
    display: flex;
    gap: 2rem;
    margin-top: 12px;
}
.form-info {
    position: relative;
    border: 1px solid var(--line-color);
    margin-top: 20px;
}
.form-text {
    background: transparent;
    border: none;
    color: white;
    width: 100%;
    min-height: 100px;
    padding: 15px;
    resize: none;
    outline: none;
    font-family: inherit;
}
.form-text::placeholder { color: var(--text-muted); }
.form-submit {
    position: absolute;
    bottom: 0;
    right: 0;
    background: transparent;
    border: none;
    border-top: 1px solid var(--line-color);
    border-left: 1px solid var(--line-color);
    color: var(--accent-color);
    padding: 10px 15px;
    cursor: pointer !important;
    font-family: inherit;
    transition: 0.2s ease;
}
.form-submit:hover {
    background: var(--accent-color);
    color: var(--bg-color);
}
.form-submit:disabled {
    opacity: 0.5;
}
.about-div{
    display: none;
    border: 1px solid var(--line-color);
    padding: 20px;
    margin-top: 10px;
    width: 70%;
    gap: 1rem;
}
#panel-technologies h3 {
    color: var(--accent-color);
}
#panel-technologies .grid {
    display: none;
    margin-top: 20px;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}
#panel-technologies h3 {
    color: var(--accent-color);
    font-size: 16px;
    margin-bottom: 15px;
    font-weight: normal;
}
.tech-list {
    list-style-type: none;
    color: var(--text-muted);
    line-height: 2;
    font-size: 14px;
}
.tech-list span {
    color: var(--text-main);
    font-weight: 500;
}
#panel-projects .grid[data-state="first"] {
    grid-template-columns: 85fr 15fr;
}
#panel-projects .grid[data-state="first"] #first-project .description{
    display: flex;
}
#panel-projects .grid[data-state="first"] #second-project > * {
    opacity: 0;
    pointer-events: none;
}
#panel-projects .grid[data-state="second"] {
    grid-template-columns: 15fr 85fr;
}
#panel-projects .grid[data-state="second"] #second-project .description{
    display: flex;
}
#panel-projects .grid[data-state="second"] #first-project > * {
    opacity: 0;
    pointer-events: none;
}
.project-div > * {
    transition: opacity 0.3s ease;
}
#panel-projects .grid {
    display: none;
    margin-top: 20px;
    grid-template-areas: "first second";
    grid-template-columns: 50fr 50fr;
    gap: 3rem;
    transition: grid-template-columns 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}
#first-project { grid-area: first; }
#second-project { grid-area: second; }
.project-div {
    border: 1px solid var(--line-color);
    padding: 40px;
}
.project-div div {
    display: flex;
    align-items: center;
}
.project-div span {
    margin-left: auto;
    color: var(--accent-color);
    font-size: 14px;
    text-decoration: underline;
    cursor: pointer !important;
}
#panel-projects img {
    height: auto;
    width: 80%;
    max-width: 20rem;
    margin: 10px 0;
}
.project-div .description {
    display: none;
}
.about-div img {
    width: 250px;
    max-width: 40%;
    height: auto;
    margin: 0 10px;
    padding: 10px;
    flex-shrink: 0;
    align-self: flex-start;
    object-fit: cover;
}
.form-status {
    margin-top: 15px;
    font-size: 14px;
    min-height: 20px;
    color: var(--text-muted);
}
.form-status.success { color: #4ade80; }
.form-status.error { color: #ef4444; }
.form-status.info { color: var(--accent-color); }

@media (max-width: 768px) {
    body {
        overflow-y: auto;
        overflow-x: hidden;
        height: auto;
        min-height: 100vh;
    }

    .main-nav {
        display: none;
    }

    .hamburger {
        display: flex;
        margin-left: auto;
    }

    .grid-container {
        display: flex;
        flex-direction: column;
        height: auto;
        gap: 1px;
    }

    .panel {
        width: 100%;
        min-height: 0;
        overflow: visible;
    }

    .grid-container[data-state="about"],
    .grid-container[data-state="projects"],
    .grid-container[data-state="technologies"],
    .grid-container[data-state="contact"] {
        grid-template-columns: unset;
        grid-template-rows: unset;
    }

    .panel.collapsed {
        cursor: pointer !important;
    }
    .panel.collapsed .panel-content {
        padding: 1rem 1.5rem;
        height: auto;
        overflow: hidden;
    }
    .panel.collapsed .panel-content > *:not(h2) {
        display: none !important;
    }
    .panel.collapsed .panel-header::after {
        content: " +";
        color: var(--accent-color);
    }

    .panel.expanded .panel-content {
        padding: 1.5rem;
        height: auto;
    }
    .panel.expanded .panel-header {
        cursor: pointer !important;
    }
    .panel.expanded .panel-header::after {
        content: " −";
        color: var(--accent-color);
    }

    .about-div {
        display: flex !important;
        flex-direction: column;
        width: 100%;
        margin-top: 1rem;
    }
    .about-div img {
        width: 100%;
        max-width: 180px;
        margin: 1rem auto 0;
    }

    .panel.expanded#panel-technologies .grid {
        display: grid !important;
        grid-template-columns: 1fr 1fr;
        gap: 1.5rem;
        margin-top: 1rem;
    }

    .panel.expanded#panel-projects .grid {
        display: flex !important;
        flex-direction: column;
        gap: 1rem;
        margin-top: 1rem;
        transition: none;
    }
    #panel-projects .grid[data-state="first"],
    #panel-projects .grid[data-state="second"] {
        grid-template-columns: unset;
    }
    #panel-projects .grid[data-state="first"] #second-project > *,
    #panel-projects .grid[data-state="second"] #first-project > * {
        opacity: 1;
        pointer-events: auto;
    }
    .project-div {
        padding: 20px;
    }
    .project-div .description {
        display: flex !important;
        font-size: 13px;
        color: var(--text-muted);
        margin-top: 8px;
    }
    .more-btn { display: none !important; }
    #panel-projects img {
        max-width: 100%;
    }

    .contact-div {
        display: flex !important;
        flex-direction: column;
        align-items: stretch;
        margin-top: 1rem;
        gap: 1rem;
    }
    .form-div {
        width: 100%;
        padding: 1rem;
    }
    .form-row {
        flex-direction: column;
        gap: 1rem;
    }

    .panel:not(.active-panel):hover {
        background-color: var(--bg-color);
    }
    .panel.collapsed:active {
        background-color: var(--bg-color-darker);
    }

    .panel.collapsed {
        border-bottom: 1px solid var(--line-color);
    }
}

@media (max-width: 480px) {
    .cursor {
        font-size: 13px;
        padding: 0 14px;
    }
    #panel-technologies .grid {
        grid-template-columns: 1fr;
    }
    .about-div {
        padding: 14px;
    }
}