/* 1. Colour palette */
:root {
    --bg: #090d1d;
    --text: #f4f6ff;
    --muted: #b9c2df;
    --mint: #7cf7c5;
    --purple: #a78bfa;
    --blue: #6bc7ff;
    --pink: #ff8bd1;
}

/* 2. Basic page styling */
* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "Segoe UI", Arial, sans-serif;
    background:
        radial-gradient(ellipse at 15% 0%, #27205a 0, transparent 38%),
        radial-gradient(ellipse at 90% 15%, #123c53 0, transparent 32%),
        var(--bg);
    color: var(--text);
    line-height: 1.6;
}

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

.navbar,
.hero {
    width: min(1120px, 92%);
    margin: auto;
}

/* 3. Navigation bar */
header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(9, 13, 29, 0.85);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid #ffffff18;
}

.navbar {
    min-height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.logo {
    font-size: 1.2rem;
    font-weight: 900;
}

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

.nav-links {
    display: flex;
    flex-wrap: wrap;
    gap: 22px;
    color: var(--muted);
    font-size: 0.92rem;
}

.nav-links a:hover {
    color: var(--mint);
}

.nav-button,
.secondary-button {
    border: 1px solid #ffffff30;
    border-radius: 12px;
    padding: 10px 14px;
}

.nav-button {
    color: var(--mint);
}

/* 4. Hero section layout */
.hero {
    min-height: 650px;
    padding: 75px 0;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 44px;
    align-items: center;
}

.tagline {
    color: var(--mint);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 2px;
}

h1 {
    font-size: clamp(2.8rem, 6vw, 5rem);
    line-height: 1.04;
    letter-spacing: -2px;
    margin: 20px 0;
}

/* 5. Colourful gradient text */
.gradient-text {
    background: linear-gradient(
        100deg,
        var(--mint),
        var(--blue),
        var(--purple),
        var(--pink)
    );
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.intro {
    max-width: 570px;
    color: var(--muted);
    font-size: 1.08rem;
}

/* 6. Hero buttons */
.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 13px;
    margin: 28px 0;
}

.primary-button,
.secondary-button {
    display: inline-block;
    padding: 12px 17px;
    border-radius: 12px;
    font-weight: 700;
}

.primary-button {
    color: #09101b;
    background: linear-gradient(100deg, var(--mint), var(--blue));
}

.primary-button:hover,
.secondary-button:hover {
    transform: translateY(-3px);
}

.secondary-button {
    background: #ffffff0b;
    border: 1px solid #ffffff2a;
}

.tech-line {
    color: var(--muted);
    font-size: 0.9rem;
}

/* 7. Decorative shield */
.hero-visual {
    min-height: 350px;
    position: relative;
    display: grid;
    place-items: center;
}

.glow-circle {
    width: min(330px, 80vw);
    aspect-ratio: 1;
    border-radius: 35% 65% 60% 40% / 40% 40% 60% 60%;
    background: linear-gradient(
        135deg,
        #7cf7c555,
        #a78bfa55,
        #ff8bd155
    );
    border: 1px solid #ffffff35;
    box-shadow: 0 0 90px #8b5cf633;
    display: grid;
    place-items: center;
    transform: rotate(-8deg);
}

.shield {
    font-size: 8rem;
    color: var(--mint);
    text-shadow: 0 0 32px #7cf7c577;
    transform: rotate(8deg);
}

/* 8. Terminal card */
.terminal {
    position: absolute;
    bottom: 0;
    left: 0;
    background: #0c1225;
    border: 1px solid #ffffff24;
    border-radius: 14px;
    padding: 12px 17px;
    font-family: Consolas, monospace;
    font-size: 0.85rem;
    box-shadow: 0 18px 50px #0005;
}

.terminal p {
    margin: 5px 0;
}

.terminal span {
    color: var(--mint);
}

/* 9. Mobile-friendly layout */
@media (max-width: 800px) {
    .navbar {
        padding: 15px 0;
        flex-wrap: wrap;
    }

    .nav-links {
        order: 3;
        width: 100%;
        gap: 15px;
    }

    .hero {
        grid-template-columns: 1fr;
        padding: 55px 0;
    }

    .hero-visual {
        min-height: 310px;
    }

    h1 {
        letter-spacing: -1px;
    }
}

/* Skills section */
.section-description {
    color: var(--muted);
    max-width: 650px;
    margin-bottom: 28px;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.skill-card {
    padding: 24px;
    border-radius: 20px;
    border: 1px solid #ffffff20;
    background: linear-gradient(
        145deg,
        #ffffff12,
        #ffffff05
    );
    transition: transform 0.25s, border-color 0.25s;
}

.skill-card:hover {
    transform: translateY(-5px);
    border-color: var(--mint);
}

.skill-icon {
    font-size: 2rem;
}

.skill-card h3 {
    margin: 12px 0 16px;
    font-size: 1.2rem;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 9px;
}

.skill-tags span {
    padding: 6px 10px;
    border-radius: 999px;
    border: 1px solid #ffffff20;
    background: #ffffff08;
    color: var(--muted);
    font-size: 0.8rem;
}

@media (max-width: 800px) {
    .skills-grid {
        grid-template-columns: 1fr;
    }
}

/* Projects section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.project-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
    border-radius: 20px;
    border: 1px solid #ffffff20;
    background: linear-gradient(145deg, #ffffff12, #ffffff05);
    transition: transform 0.25s, border-color 0.25s;
}

.project-card:hover {
    transform: translateY(-5px);
    border-color: var(--mint);
}

.project-top {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 18px;
}

.project-emoji {
    font-size: 2rem;
}

.project-status {
    font-size: 0.72rem;
    color: var(--mint);
    border: 1px solid #7cf7c550;
    border-radius: 999px;
    padding: 5px 9px;
}

.project-card h3 {
    font-size: 1.2rem;
    margin: 0 0 10px;
}

.project-card p {
    color: var(--muted);
    font-size: 0.92rem;
    line-height: 1.7;
}

.project-card .skill-tags {
    margin: 8px 0 20px;
}

.project-card a,
.project-note {
    margin-top: auto;
    padding-top: 10px;
    color: var(--mint);
    font-size: 0.9rem;
    text-decoration: none;
}

.project-card a:hover {
    text-decoration: underline;
}

.project-note {
    color: var(--muted);
}

@media (max-width: 900px) {
    .projects-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 600px) {
    .projects-grid {
        grid-template-columns: 1fr;
    }
}

/* About section */
.content-section {
    width: min(1120px, 92%);
    margin: auto;
    padding: 65px 0;
    scroll-margin-top: 90px;
}

.section-label {
    color: var(--pink);
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 2px;
}

.content-section h2 {
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    line-height: 1.15;
    letter-spacing: -1px;
    margin-bottom: 28px;
}

.about-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.info-card,
.stat-card {
    background: linear-gradient(145deg, #ffffff12, #ffffff05);
    border: 1px solid #ffffff20;
    border-radius: 20px;
    padding: 25px;
}

.info-card h3 {
    font-size: 1.35rem;
}

.info-card p {
    color: var(--muted);
    line-height: 1.8;
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

.stat-card {
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: linear-gradient(135deg, #7cf7c51a, #a78bfa18);
}

.stat-card strong {
    font-size: 1.8rem;
    color: var(--mint);
}

.stat-card span {
    color: var(--muted);
    font-size: 0.9rem;
}

@media (max-width: 700px) {
    .about-layout {
        grid-template-columns: 1fr;
    }
}

/* Certifications section */
.certificates-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.certificate-card {
    padding: 25px;
    border: 1px solid #ffffff20;
    border-radius: 20px;
    background: linear-gradient(145deg, #a78bfa18, #7cf7c510);
    transition: transform 0.25s, border-color 0.25s;
}

.certificate-card:hover {
    transform: translateY(-5px);
    border-color: var(--pink);
}

.certificate-icon {
    font-size: 2.3rem;
    margin-bottom: 18px;
}

.certificate-type {
    color: var(--pink);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 1.2px;
}

.certificate-card h3 {
    font-size: 1.15rem;
    line-height: 1.5;
}

.certificate-card > p:not(.certificate-type) {
    color: var(--muted);
    line-height: 1.7;
    font-size: 0.92rem;
}

.certificate-tag {
    display: inline-block;
    margin-top: 10px;
    padding: 7px 11px;
    border-radius: 999px;
    background: #ffffff0d;
    border: 1px solid #ffffff20;
    color: var(--mint);
    font-size: 0.78rem;
}

@media (max-width: 900px) {
    .certificates-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 600px) {
    .certificates-grid {
        grid-template-columns: 1fr;
    }
}

/* Contact section */
.contact-section {
    padding-bottom: 100px;
}

.contact-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 25px;
    padding: 30px;
    border: 1px solid #ffffff20;
    border-radius: 22px;
    background: linear-gradient(135deg, #a78bfa18, #7cf7c512);
}

.contact-card h3 {
    font-size: 1.3rem;
}

.contact-card p {
    max-width: 500px;
    color: var(--muted);
    line-height: 1.7;
}

.contact-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.contact-links a {
    display: inline-block;
    padding: 11px 15px;
    border: 1px solid #ffffff25;
    border-radius: 12px;
    color: var(--mint);
    text-decoration: none;
    background: #ffffff08;
    transition: transform 0.2s, border-color 0.2s;
}

.contact-links a:hover {
    transform: translateY(-3px);
    border-color: var(--mint);
}

/* Mobile navigation menu */
.menu-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--mint);
    color: var(--mint);
    font-size: 1.5rem;
    padding: 4px 10px;
    border-radius: 8px;
    cursor: pointer;
}

@media (max-width: 768px) {
    .navbar {
        flex-wrap: wrap;
    }

    .menu-toggle {
        display: block;
    }

    .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 16px;
        order: 3;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-button {
        margin-left: auto;
    }
}