:root {
    --background: #08111f;
    --background-secondary: #0d1726;
    --card: #111e30;

    --text: #f3f6fb;
    --text-secondary: #9ca9ba;

    --accent: #55c2ff;
    --accent-secondary: #7f8cff;

    --border: rgba(255, 255, 255, 0.08);

    --max-width: 1150px;
}


* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}


html {
    scroll-behavior: smooth;
}


body {
    background: var(--background);
    color: var(--text);

    font-family:
        Inter,
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;

    line-height: 1.6;
}


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


.container {
    width: min(90%, var(--max-width));
    margin: 0 auto;
}


/* NAVIGATION */

.header {
    position: sticky;
    top: 0;
    z-index: 100;

    background: rgba(8, 17, 31, 0.9);
    backdrop-filter: blur(14px);

    border-bottom: 1px solid var(--border);
}


.nav {
    min-height: 72px;

    display: flex;
    align-items: center;
    justify-content: space-between;

    gap: 30px;
}


.logo {
    font-size: 1.3rem;
    font-weight: 800;
}


.logo span {
    color: var(--accent);
}


nav {
    display: flex;
    gap: 28px;
}


nav a {
    color: var(--text-secondary);
    font-size: 0.92rem;

    transition: color 0.2s ease;
}


nav a:hover {
    color: var(--text);
}


/* HERO */

.hero {
    min-height: 88vh;

    display: flex;
    align-items: center;

    background:
        radial-gradient(
            circle at 80% 20%,
            rgba(85, 194, 255, 0.14),
            transparent 35%
        ),
        radial-gradient(
            circle at 20% 80%,
            rgba(127, 140, 255, 0.12),
            transparent 30%
        );
}


.hero-content {
    padding: 100px 0;
}


.eyebrow,
.section-label {
    color: var(--accent);

    font-size: 0.8rem;
    font-weight: 700;

    letter-spacing: 0.16em;
    text-transform: uppercase;

    margin-bottom: 20px;
}


.hero h1 {
    max-width: 900px;

    font-size: clamp(3rem, 8vw, 6.8rem);
    line-height: 0.95;

    letter-spacing: -0.05em;

    margin-bottom: 35px;
}


.hero h1 span {
    display: block;

    background: linear-gradient(
        90deg,
        var(--accent),
        var(--accent-secondary)
    );

    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}


.hero-description {
    max-width: 700px;

    color: var(--text-secondary);

    font-size: 1.15rem;

    margin-bottom: 16px;
}


.hero-description.secondary {
    font-size: 1rem;
}


.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;

    margin-top: 35px;
}


/* BUTTONS */

.button {
    display: inline-block;

    padding: 13px 22px;

    border-radius: 8px;

    font-weight: 700;

    transition:
        transform 0.2s ease,
        background 0.2s ease;
}


.button:hover {
    transform: translateY(-2px);
}


.primary {
    background: var(--accent);
    color: #06101b;
}


.secondary-button {
    border: 1px solid var(--border);
    color: var(--text);
}


.secondary-button:hover {
    background: var(--card);
}


/* SECTIONS */

.section {
    padding: 110px 0;
}


.alternate {
    background: var(--background-secondary);
}


.section h2 {
    max-width: 700px;

    font-size: clamp(2rem, 5vw, 3.8rem);
    line-height: 1.1;

    letter-spacing: -0.04em;

    margin-bottom: 50px;
}


/* ABOUT */

.about-grid {
    display: grid;

    grid-template-columns:
        repeat(2, minmax(0, 1fr));

    gap: 60px;

    color: var(--text-secondary);

    font-size: 1.08rem;
}


/* CARDS */

.cards {
    display: grid;

    grid-template-columns:
        repeat(2, minmax(0, 1fr));

    gap: 20px;
}


.card {
    position: relative;

    min-height: 210px;

    padding: 30px;

    background: var(--card);

    border: 1px solid var(--border);
    border-radius: 14px;
}


.card-number {
    display: block;

    color: var(--accent);
    font-size: 0.78rem;

    margin-bottom: 50px;
}


.card h3 {
    font-size: 1.4rem;
    margin-bottom: 10px;
}


.card p {
    color: var(--text-secondary);
}


/* PROJECT */

.project {
    display: grid;

    grid-template-columns:
        2fr 1fr;

    gap: 60px;

    padding: 40px;

    border: 1px solid var(--border);
    border-radius: 16px;

    background: var(--card);
}


.status {
    display: inline-block;

    margin-bottom: 22px;

    padding: 6px 11px;

    border: 1px solid rgba(85, 194, 255, 0.25);
    border-radius: 100px;

    color: var(--accent);

    font-size: 0.78rem;
}


.project h3 {
    font-size: 2rem;
    margin-bottom: 20px;
}


.project p {
    color: var(--text-secondary);
    margin-bottom: 15px;
}


.project-tech {
    display: flex;

    flex-wrap: wrap;

    align-content: flex-start;

    gap: 10px;
}


.project-tech span {
    padding: 8px 12px;

    border: 1px solid var(--border);
    border-radius: 7px;

    color: var(--text-secondary);

    font-size: 0.85rem;
}


/* LEARNING */

.learning-list {
    border-top: 1px solid var(--border);
}


.learning-item {
    display: flex;

    justify-content: space-between;
    align-items: center;

    gap: 30px;

    padding: 26px 0;

    border-bottom: 1px solid var(--border);
}


.learning-item strong {
    font-size: 1.05rem;
}


.learning-item p {
    color: var(--text-secondary);
    margin-top: 5px;
}


.learning-item > span {
    color: var(--accent);

    font-size: 0.8rem;

    white-space: nowrap;
}


/* CONTACT */

.contact p:not(.section-label) {
    max-width: 600px;

    color: var(--text-secondary);

    margin-bottom: 30px;
}


/* FOOTER */

footer {
    border-top: 1px solid var(--border);
}


.footer-content {
    min-height: 100px;

    display: flex;
    align-items: center;
    justify-content: space-between;

    gap: 20px;

    color: var(--text-secondary);

    font-size: 0.85rem;
}


/* RESPONSIVE */

@media (max-width: 800px) {

    nav {
        display: none;
    }


    .hero {
        min-height: auto;
    }


    .hero-content {
        padding: 100px 0 80px;
    }


    .about-grid,
    .cards,
    .project {
        grid-template-columns: 1fr;
    }


    .project {
        gap: 30px;
    }


    .learning-item {
        align-items: flex-start;
        flex-direction: column;
        gap: 10px;
    }


    .footer-content {
        flex-direction: column;

        justify-content: center;
        align-items: flex-start;
    }

}

/* CHAT */

.chat-description {
    max-width: 700px;

    color: var(--text-secondary);

    margin-top: -25px;
    margin-bottom: 35px;
}


.chat-container {
    max-width: 850px;

    border: 1px solid var(--border);
    border-radius: 16px;

    overflow: hidden;

    background: var(--card);
}


.chat-messages {
    min-height: 340px;
    max-height: 500px;

    overflow-y: auto;

    display: flex;
    flex-direction: column;

    gap: 16px;

    padding: 30px;
}


.chat-message {
    max-width: 78%;

    padding: 14px 18px;

    border-radius: 14px;

    line-height: 1.5;

    font-size: 0.95rem;
}


.assistant-message {
    align-self: flex-start;

    background: var(--background-secondary);

    border: 1px solid var(--border);

    color: var(--text-secondary);
}


.user-message {
    align-self: flex-end;

    background: var(--accent);

    color: #06101b;

    font-weight: 600;
}


.chat-form {
    display: flex;

    gap: 12px;

    padding: 20px;

    border-top: 1px solid var(--border);
}


.chat-form input {
    flex: 1;

    min-width: 0;

    padding: 14px 16px;

    background: var(--background);

    border: 1px solid var(--border);
    border-radius: 8px;

    color: var(--text);

    font: inherit;

    outline: none;
}


.chat-form input:focus {
    border-color: var(--accent);
}


.chat-form input::placeholder {
    color: var(--text-secondary);
}


.chat-form button:disabled,
.chat-form input:disabled {
    opacity: 0.6;
}


@media (max-width: 600px) {

    .chat-form {
        flex-direction: column;
    }


    .chat-message {
        max-width: 90%;
    }

}