/* Base reset and defaults */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg-0: #060b12;
    --bg-1: #0b1420;
    --bg-2: #111f30;
    --surface-0: rgba(17, 31, 48, 0.7);
    --surface-1: #17283c;
    --surface-2: #21364d;
    --text-main: #e5edf5;
    --text-muted: #9db2c4;
    --accent-cyan: #2bd0b7;
    --accent-blue: #45a3ff;
    --accent-cyan-strong: #19b59f;
    --border-subtle: rgba(104, 136, 165, 0.32);
    --focus-ring: #7dd9ff;
    --shadow-strong: 0 18px 42px rgba(0, 0, 0, 0.35);
    --shadow-soft: 0 8px 20px rgba(0, 0, 0, 0.22);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Trebuchet MS", "Lucida Sans Unicode", "Lucida Grande", "Lucida Sans", Arial, sans-serif;
    color: var(--text-main);
    line-height: 1.6;
    background:
        radial-gradient(circle at 10% 0%, rgba(69, 163, 255, 0.13), transparent 42%),
        radial-gradient(circle at 85% 12%, rgba(43, 208, 183, 0.11), transparent 44%),
        linear-gradient(165deg, var(--bg-0) 0%, var(--bg-1) 52%, var(--bg-2) 100%);
    min-height: 100vh;
    position: relative;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(124, 160, 188, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(124, 160, 188, 0.06) 1px, transparent 1px);
    background-size: 42px 42px;
    mask-image: radial-gradient(circle at center, black 30%, transparent 86%);
    z-index: -1;
}

a {
    color: inherit;
}

/* Accessibility */
.skip-link {
    position: absolute;
    left: -9999px;
}

.skip-link:focus,
.skip-link:focus-visible {
    left: 1rem;
    top: 1rem;
    z-index: 999;
    padding: 0.6rem 0.9rem;
    border: 2px solid var(--focus-ring);
    border-radius: 0.4rem;
    background: #09131f;
    color: var(--text-main);
}

:focus-visible {
    outline: 2px solid var(--focus-ring);
    outline-offset: 2px;
}

/* Layout */
.container {
    width: min(92%, 1120px);
    margin: 0 auto;
}

.section {
    padding: 4.5rem 0;
}

h1,
h2,
h3 {
    line-height: 1.2;
}

h2 {
    font-size: clamp(1.6rem, 2vw, 2.1rem);
    margin-bottom: 1rem;
}

/* Header / Navigation */
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-subtle);
    background: rgba(5, 12, 19, 0.82);
}

.header-bar {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1.5rem;
    padding: 1rem 0;
}

.eyebrow {
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.site-header h1 {
    font-size: clamp(1.45rem, 2vw, 1.95rem);
}

.tagline {
    margin-top: 0.25rem;
    font-size: 0.95rem;
    color: var(--text-muted);
}

.site-nav {
    display: none;
    padding-bottom: 1rem;
}

.site-nav.active {
    display: block;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.nav-links a {
    display: inline-block;
    text-decoration: none;
    color: var(--text-main);
    padding: 0.55rem 0.9rem;
    border: 1px solid transparent;
    border-radius: 999px;
    transition: all 0.2s ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
    border-color: var(--border-subtle);
    background: rgba(69, 163, 255, 0.13);
    color: #f4fbff;
}

.nav-toggle {
    background: linear-gradient(150deg, var(--surface-2), #1b3248);
    border: 1px solid var(--border-subtle);
    color: var(--text-main);
    padding: 0.55rem 0.8rem;
    border-radius: 0.55rem;
    cursor: pointer;
    font-size: 1.2rem;
    line-height: 1;
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
    background: linear-gradient(150deg, #27435f, #1f384f);
}

/* Hero */
.hero {
    padding-top: 5.5rem;
    padding-bottom: 4.5rem;
}

.hero-grid {
    display: grid;
    align-items: center;
    grid-template-columns: minmax(0, 1fr);
}

.hero-copy {
    background: linear-gradient(170deg, rgba(17, 31, 48, 0.8), rgba(10, 21, 33, 0.86));
    border: 1px solid var(--border-subtle);
    border-radius: 1rem;
    box-shadow: var(--shadow-strong);
    padding: clamp(1.4rem, 3.2vw, 2.3rem);
}

.hero-kicker {
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent-cyan);
    font-weight: 700;
    font-size: 0.8rem;
}

.hero h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin: 0.55rem 0 1rem;
}

.hero-subtitle {
    color: var(--text-muted);
    max-width: 70ch;
}

.hero-ctas {
    margin-top: 1.5rem;
    display: flex;
    gap: 0.8rem;
    flex-wrap: wrap;
}

.profile-links {
    margin-top: 1.1rem;
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
}

.profile-links a {
    display: inline-block;
    text-decoration: none;
    color: #dff6f2;
    border: 1px solid rgba(43, 208, 183, 0.4);
    background: rgba(23, 48, 68, 0.5);
    border-radius: 999px;
    padding: 0.4rem 0.7rem;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.link-icon {
    display: inline-flex;
    align-items: center;
    margin-right: 0.35rem;
    vertical-align: text-bottom;
}

.profile-links a:hover,
.profile-links a:focus-visible {
    background: rgba(43, 208, 183, 0.2);
    border-color: rgba(43, 208, 183, 0.75);
    color: #f3fffc;
}

.hero::after {
    content: "";
    display: block;
    width: min(1120px, 92%);
    margin: 2.2rem auto 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(69, 163, 255, 0.45), transparent);
}

.button {
    display: inline-block;
    text-decoration: none;
    border-radius: 0.55rem;
    border: 1px solid transparent;
    padding: 0.7rem 1rem;
    font-weight: 700;
    transition: all 0.2s ease;
}

.button-primary {
    color: #041218;
    background: linear-gradient(130deg, var(--accent-cyan), var(--accent-blue));
}

.button-primary:hover,
.button-primary:focus-visible {
    filter: brightness(1.08);
}

.button-secondary {
    color: var(--text-main);
    background: transparent;
    border-color: var(--border-subtle);
}

.button-secondary:hover,
.button-secondary:focus-visible {
    background: rgba(43, 208, 183, 0.1);
    border-color: rgba(43, 208, 183, 0.6);
}

/* Content sections */
#about-me,
#projects,
#skills,
#contact {
    background: transparent;
    border: none;
}

#about-me .container,
#projects .container,
#skills .container,
#contact .container {
    background: linear-gradient(170deg, rgba(17, 31, 48, 0.82), rgba(10, 21, 33, 0.78));
    border: 1px solid var(--border-subtle);
    border-radius: 1rem;
    padding: clamp(1.1rem, 2.4vw, 2rem);
    box-shadow: var(--shadow-soft);
}

#about-me h2,
#projects h2,
#skills h2,
#contact h2 {
    border-left: 4px solid var(--accent-blue);
    padding-left: 0.75rem;
}

.about-text,
.contact-intro {
    color: var(--text-muted);
    max-width: 75ch;
}

.contact-intro a {
    color: #7dd9ff;
    text-decoration-thickness: 2px;
    text-underline-offset: 2px;
}

.contact-intro a:hover,
.contact-intro a:focus-visible {
    color: #b4ebff;
}

.contact-map {
    margin-top: 1rem;
    margin-bottom: 1.25rem;
    border: 1px solid var(--border-subtle);
    border-radius: 0.8rem;
    padding: 0.9rem;
    background: rgba(9, 20, 31, 0.72);
}

.contact-map h3 {
    font-size: 1.05rem;
    margin-bottom: 0.55rem;
}

.contact-map iframe {
    width: 100%;
    min-height: 240px;
    border: 1px solid rgba(104, 136, 165, 0.5);
    border-radius: 0.55rem;
}

.map-credit {
    margin-top: 0.45rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.map-credit a {
    color: #7dd9ff;
}

.map-credit a:hover,
.map-credit a:focus-visible {
    color: #b4ebff;
}

/* Projects */
.project-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1.35rem;
}

.filter-button {
    border: 1px solid var(--border-subtle);
    color: var(--text-main);
    background: #132336;
    border-radius: 999px;
    padding: 0.55rem 0.9rem;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
}

.filter-button:hover,
.filter-button:focus-visible {
    background: #1d3248;
}

.filter-button.active {
    background: linear-gradient(140deg, var(--accent-blue), #2d86da);
    color: #051523;
    border-color: transparent;
}

.project-card {
    border: 1px solid var(--border-subtle);
    border-radius: 0.95rem;
    background: linear-gradient(170deg, #13273b, #102031);
    padding: 1.2rem;
    margin-bottom: 0;
    box-shadow: 0 12px 22px rgba(0, 0, 0, 0.24);
    transition: transform 0.25s ease, border-color 0.25s ease;
}

.project-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.project-card:hover,
.project-card:focus-within {
    transform: translateY(-4px);
    border-color: rgba(69, 163, 255, 0.75);
}

.project-type {
    color: var(--accent-cyan);
    font-size: 0.82rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.project-card h3 {
    margin-bottom: 0.7rem;
}

.project-card p {
    color: #bfd0dd;
}

.project-highlights {
    margin-top: 0.9rem;
    list-style: none;
}

.project-highlights li {
    position: relative;
    padding-left: 1rem;
    margin-bottom: 0.45rem;
    color: #d6e3ed;
}

.project-highlights li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.66rem;
    width: 0.4rem;
    height: 0.4rem;
    border-radius: 50%;
    background: var(--accent-cyan);
}

/* Skills chips */
.skills-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    margin-top: 0.8rem;
}

.skills-list li {
    padding: 0.5rem 0.78rem;
    border-radius: 999px;
    border: 1px solid rgba(43, 208, 183, 0.35);
    background: rgba(21, 44, 66, 0.65);
    color: #dcf8f2;
    font-weight: 600;
    box-shadow: inset 0 0 0 1px rgba(85, 214, 190, 0.1);
}

/* Contact */
.contact-form {
    margin-top: 1.4rem;
    max-width: 760px;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.45rem;
    color: #d8e6f2;
    font-weight: 700;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.76rem 0.8rem;
    border-radius: 0.55rem;
    border: 1px solid var(--border-subtle);
    background: rgba(6, 13, 20, 0.7);
    color: var(--text-main);
    font: inherit;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group textarea {
    resize: vertical;
    min-height: 9rem;
}

.form-group input:focus-visible,
.form-group textarea:focus-visible {
    border-color: var(--focus-ring);
    box-shadow: 0 0 0 3px rgba(125, 217, 255, 0.18);
}

.contact-form button {
    border: none;
    border-radius: 0.55rem;
    padding: 0.72rem 1.1rem;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan-strong));
    color: #031622;
    font-weight: 800;
    font: inherit;
    cursor: pointer;
}

.contact-form button:hover,
.contact-form button:focus-visible {
    filter: brightness(1.07);
}

.contact-form button:disabled {
    opacity: 0.75;
    cursor: wait;
}

.honeypot {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.contact-status {
    margin-top: 0.75rem;
    color: var(--text-muted);
    min-height: 1.4rem;
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--border-subtle);
    color: var(--text-muted);
    padding: 1.3rem 0 2.5rem;
    text-align: center;
}

/* Desktop navigation */
@media (min-width: 861px) {
    .site-nav {
        display: block;
        padding-bottom: 1rem;
    }

    .nav-toggle {
        display: none;
    }

    .header-bar {
        align-items: center;
    }

    .contact-map iframe {
        min-height: 360px;
    }
}

/* Mobile layout */
@media (max-width: 860px) {
    .section {
        padding: 3.5rem 0;
    }

    .hero {
        padding-top: 4.3rem;
    }

    #about-me .container,
    #projects .container,
    #skills .container,
    #contact .container {
        padding: 1.15rem;
    }

    .nav-links {
        flex-direction: column;
        align-items: flex-start;
    }

    .nav-links a {
        width: 100%;
    }
}

@media (max-width: 600px) {
    .hero-copy {
        padding: 1.2rem;
    }

    .hero h2 {
        font-size: 1.85rem;
    }

    .button {
        width: 100%;
        text-align: center;
    }

    .contact-map iframe {
        min-height: 210px;
    }
}