@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
    --bg-primary: #0b1220;
    --bg-surface: #101a2c;
    --bg-card: #162238;
    --text-primary: #e5ebf5;
    --text-secondary: #b7c4d7;
    --text-muted: #8ea0b8;
    --accent: #4f7cff;
    --accent-hover: #6f92ff;
    --border: #283a56;
    --success: #34d399;
    --shadow: 0 12px 28px rgba(7, 12, 24, 0.35);
}

.light-theme {
    --bg-primary: #f4f7fc;
    --bg-surface: #ffffff;
    --bg-card: #ffffff;
    --text-primary: #12203a;
    --text-secondary: #304867;
    --text-muted: #5e7491;
    --accent: #2f5fe4;
    --accent-hover: #244fc7;
    --border: #d6e0ef;
    --shadow: 0 8px 24px rgba(28, 52, 86, 0.12);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background 0.25s ease, color 0.25s ease;
}

a {
    color: inherit;
}

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

section {
    padding: 5rem 0;
}

.section-title {
    margin-bottom: 2rem;
    text-align: center;
}

.section-title h2 {
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    margin-bottom: 0.5rem;
}

.section-title .section-lead {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 400;
    max-width: 32rem;
    margin: 0.5rem auto 0;
    line-height: 1.55;
}

#navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border);
    background: color-mix(in srgb, var(--bg-surface) 85%, transparent);
    backdrop-filter: blur(10px);
}

.nav-container {
    width: min(1120px, 92%);
    margin: 0 auto;
    min-height: 68px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}
.mobile-menu-toggle {
    position: absolute;
    right: 0;
    display: none;
}

.nav-menu {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.nav-link {
    display: inline-block;
    text-decoration: none;
    color: var(--text-secondary);
    padding: 0.45rem 0.75rem;
    border-radius: 8px;
    font-weight: 500;
    transition: color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}
.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-card);
    transform: translateY(-1px);
}
.nav-link.active {
    color: var(--text-primary);
    background: var(--bg-card);
}

.theme-toggle,
.mobile-menu-toggle {
    width: 38px;
    height: 38px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-card);
    color: var(--text-primary);
    cursor: pointer;
    transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}
.theme-toggle:hover,
.mobile-menu-toggle:hover {
    background: color-mix(in srgb, var(--accent) 18%, var(--bg-card));
    border-color: var(--accent);
    transform: scale(1.05);
}

/* Merged intro section (hero + about) – fits in one viewport */
.intro-section {
    min-height: calc(100vh - 68px);
    display: flex;
    align-items: center;
    padding: 0.55rem 0 0.7rem;
    box-sizing: border-box;
}
.intro-section .container {
    width: min(1260px, 97%);
    padding: 0;
}

.intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.4rem;
    align-items: center;
    width: 100%;
}

.intro-about-wrap {
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 100%;
}

.intro-primary {
    padding-top: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.intro-photo-wrap {
    margin-bottom: 1rem;
}

.intro-photo {
    width: 252px;
    height: 252px;
    border-radius: 14px;
    object-fit: cover;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.intro-primary:hover .intro-photo {
    transform: scale(1.02);
    box-shadow: 0 12px 28px rgba(7, 12, 24, 0.4);
    border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
}

.intro-name {
    font-size: clamp(2.2rem, 5vw, 3.2rem);
    line-height: 1.1;
    margin: 0 0 0.35rem 0;
    font-weight: 800;
}

.hero-kicker {
    color: var(--accent);
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 0.02em;
    margin-bottom: 0.75rem;
}

.intro-summary {
    color: var(--text-secondary);
    font-size: 0.94rem;
    line-height: 1.45;
    margin-bottom: 0.8rem;
    max-width: 48ch;
}

.hero-metadata {
    margin: 0.65rem 0 0.9rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem 1.2rem;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.hero-metadata i {
    margin-right: 0.4rem;
}

.hero-cta {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    justify-content: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    border-radius: 10px;
    padding: 0.72rem 1rem;
    border: 1px solid transparent;
    font-weight: 600;
    transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
    cursor: pointer;
}
.btn:hover {
    transform: translateY(-2px);
}
.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: var(--accent);
    color: #fff;
}

.btn-primary:hover {
    background: var(--accent-hover);
    box-shadow: 0 6px 20px color-mix(in srgb, var(--accent) 35%, transparent);
}

.btn-secondary {
    background: transparent;
    border-color: var(--border);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--bg-card);
    border-color: var(--accent);
    color: var(--accent);
}

/* Left column: About me */
.intro-about {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 1.1rem 1.2rem;
    min-height: 470px;
    max-height: calc(100vh - 185px);
    overflow: auto;
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.intro-about:hover {
    transform: translateY(-4px);
    border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
    box-shadow: 0 10px 28px rgba(7, 12, 24, 0.22);
}

.about-heading {
    color: var(--accent);
    font-size: 1.32rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    line-height: 1.3;
    white-space: nowrap;
}

.intro-about p {
    color: var(--text-secondary);
    font-size: 1.06rem;
    line-height: 1.66;
    margin-bottom: 0.6rem;
}
.intro-about p:last-child {
    margin-bottom: 0;
}

.intro-about::-webkit-scrollbar {
    width: 8px;
}
.intro-about::-webkit-scrollbar-thumb {
    background: color-mix(in srgb, var(--accent) 35%, var(--border));
    border-radius: 999px;
}

#projects,
#education {
    background: var(--bg-surface);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.skills-showcase {
    display: grid;
    grid-template-columns: 1fr 1.15fr 1fr;
    grid-template-areas:
        "s1 cloud s2"
        "s3 cloud s4";
    gap: 1rem;
    align-items: stretch;
}

.skill-pos-1 { grid-area: s1; }
.skill-pos-2 { grid-area: s2; }
.skill-pos-3 { grid-area: s3; }
.skill-pos-4 { grid-area: s4; }

.skill-group {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.1rem;
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.skill-group:hover {
    transform: translateY(-4px);
    border-color: color-mix(in srgb, var(--accent) 50%, var(--border));
    box-shadow: 0 8px 24px rgba(7, 12, 24, 0.25);
}
.skill-group h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.skill-group p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.skills-cloud {
    grid-area: cloud;
    display: flex;
    flex-wrap: wrap;
    align-content: center;
    justify-content: center;
    align-items: center;
    gap: 0.55rem 0.65rem;
    padding: 1.35rem 1.1rem;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: radial-gradient(circle at 20% 20%, color-mix(in srgb, var(--accent) 18%, var(--bg-card)), var(--bg-card));
    min-height: 320px;
    box-shadow: 0 8px 26px rgba(7, 12, 24, 0.24);
}

.cloud-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.4rem 0.65rem;
    border-radius: 999px;
    border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--border));
    background: color-mix(in srgb, var(--bg-surface) 85%, transparent);
    color: var(--text-primary);
    font-size: 0.82rem;
    font-weight: 600;
    animation: floatTag 7s ease-in-out infinite;
    flex: 0 0 auto;
}

.cloud-tag i {
    color: var(--accent);
}

.c1 { animation-delay: 0s; }
.c2 { animation-delay: 0.35s; }
.c3 { animation-delay: 0.7s; }
.c4 { animation-delay: 1.05s; }
.c5 { animation-delay: 1.4s; }
.c6 { animation-delay: 1.75s; }
.c7 { animation-delay: 2.1s; }
.c8 { animation-delay: 2.45s; }
.c9 { animation-delay: 2.8s; }
.c10 { animation-delay: 3.15s; }
.c11 { animation-delay: 3.5s; }
.c12 { animation-delay: 3.85s; }

@keyframes floatTag {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.timeline {
    display: grid;
    gap: 1rem;
}

.timeline-item {
    display: grid;
    grid-template-columns: 165px 1fr 210px;
    gap: 1rem;
    align-items: stretch;
}

.timeline-date {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 600;
    padding-top: 0.5rem;
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1rem 1.15rem;
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
    height: 100%;
}
.timeline-item:hover .timeline-content {
    transform: translateX(4px);
    border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
    box-shadow: 0 6px 20px rgba(7, 12, 24, 0.2);
}

.timeline-content h3 {
    font-size: 1.05rem;
}

.timeline-content h4 {
    color: var(--text-secondary);
    font-size: 0.92rem;
    margin-bottom: 0.65rem;
    font-weight: 600;
}

.timeline-content ul {
    padding-left: 1rem;
}

.timeline-content li {
    color: var(--text-secondary);
    margin-bottom: 0.45rem;
    font-size: 0.95rem;
}

.exp-stack {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 0.7rem;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
    cursor: pointer;
}

.timeline-item:hover .exp-stack {
    transform: translateY(-3px);
    border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
    box-shadow: 0 8px 20px rgba(7, 12, 24, 0.22);
}

.exp-stack h5 {
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--accent);
    margin-bottom: 0.55rem;
}

.exp-stack-icons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    min-height: 80px;
    overflow: hidden;
    align-content: flex-start;
}

.exp-stack-icons span {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.78rem;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 0.2rem 0.5rem;
    background: var(--bg-surface);
    transition: transform 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.exp-stack-icons i {
    color: var(--accent);
}

.exp-stack-icons span:hover {
    transform: translateY(-2px);
    border-color: color-mix(in srgb, var(--accent) 48%, var(--border));
    color: var(--text-primary);
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.project-card:hover {
    transform: translateY(-6px);
    border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
    box-shadow: 0 12px 32px rgba(7, 12, 24, 0.3);
}
.project-card img {
    width: 100%;
    height: 190px;
    object-fit: cover;
    border-bottom: 1px solid var(--border);
    transition: transform 0.4s ease;
}
.project-card:hover img {
    transform: scale(1.06);
}

.project-body {
    padding: 1rem;
}

.project-body h3 {
    margin-bottom: 0.5rem;
}

.project-body p {
    color: var(--text-secondary);
    margin-bottom: 0.8rem;
    font-size: 0.95rem;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.project-tech span {
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 0.2rem 0.65rem;
    color: var(--text-secondary);
    font-size: 0.8rem;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.project-card:hover .project-tech span {
    border-color: color-mix(in srgb, var(--accent) 50%, var(--border));
    color: var(--text-primary);
}

.section-actions {
    margin-top: 1.2rem;
    text-align: center;
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.education-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1rem;
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.education-card:hover {
    transform: translateY(-4px);
    border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
    box-shadow: 0 8px 24px rgba(7, 12, 24, 0.2);
}
.education-card h3 {
    font-size: 1.04rem;
}

.education-card h4 {
    font-size: 0.92rem;
    color: var(--text-secondary);
    margin-bottom: 0.35rem;
}

.education-card p {
    color: var(--text-secondary);
    font-size: 0.93rem;
}

.certifications {
    margin-top: 1.2rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1rem;
    transition: border-color 0.25s ease, box-shadow 0.25s ease;
}
.certifications:hover {
    border-color: color-mix(in srgb, var(--accent) 35%, var(--border));
    box-shadow: 0 6px 20px rgba(7, 12, 24, 0.2);
}
.certifications h3 {
    margin-bottom: 0.6rem;
    text-align: center;
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.8rem;
}

.cert-card {
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
    background: var(--bg-surface);
    width: 100%;
    appearance: none;
    cursor: pointer;
    font: inherit;
    color: inherit;
    padding: 0;
    text-align: left;
    text-decoration: none;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.cert-card:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.cert-card:hover {
    transform: translateY(-3px);
    border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
    box-shadow: 0 8px 20px rgba(7, 12, 24, 0.22);
}

.cert-card img {
    width: 100%;
    height: 95px;
    object-fit: cover;
    border-bottom: 1px solid var(--border);
}

.cert-card p {
    margin: 0;
    padding: 0.55rem 0.5rem 0.65rem;
    font-size: 0.77rem;
    line-height: 1.35;
    color: var(--text-secondary);
    text-align: center;
}

.cert-modal {
    position: fixed;
    inset: 0;
    z-index: 1200;
    display: none;
}

.cert-modal.is-open {
    display: block;
}

.cert-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(4, 8, 18, 0.72);
    backdrop-filter: blur(2px);
}

.cert-modal-card {
    position: relative;
    width: min(780px, 92vw);
    margin: 6vh auto 0;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: 0 16px 36px rgba(7, 12, 24, 0.45);
    padding: 0.9rem 0.9rem 1rem;
}

.cert-modal-close {
    position: absolute;
    right: 0.7rem;
    top: 0.6rem;
    width: 32px;
    height: 32px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-card);
    color: var(--text-primary);
    cursor: pointer;
}

#cert-modal-image {
    width: 100%;
    max-height: 62vh;
    object-fit: contain;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--bg-card);
}

#cert-modal-title {
    margin: 0.75rem 0 0.35rem;
    font-size: 1rem;
}

#cert-modal-source-line {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
    overflow-wrap: anywhere;
    word-break: break-word;
    white-space: normal;
}

#cert-modal-source {
    color: var(--accent);
    display: inline-block;
    max-width: 100%;
    overflow-wrap: anywhere;
    word-break: break-word;
    white-space: normal;
    vertical-align: top;
}

#cert-modal-no-source {
    display: none;
}

#cert-modal-source-line.no-source #cert-modal-source {
    display: none;
}

#cert-modal-source-line.no-source #cert-modal-no-source {
    display: inline;
}

#contact {
    background: var(--bg-primary);
}

.contact-content {
    max-width: 880px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 2.25rem;
}

.contact-methods {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 0.85rem;
    align-items: stretch;
    list-style: none;
    margin: 0;
    padding: 0;
}

.contact-methods > li {
    min-width: 0;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
}

.contact-method {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.65rem;
    flex: 1;
    min-height: 100%;
    padding: 1.1rem 1rem 1rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    text-decoration: none;
    color: inherit;
    transition: border-color 0.22s ease, box-shadow 0.22s ease, transform 0.22s ease;
    position: relative;
    overflow: hidden;
}

.contact-method--static {
    cursor: default;
}

.contact-method--static:hover {
    transform: none;
    box-shadow: none;
    border-color: var(--border);
}

.contact-method--static::before {
    opacity: 0.45;
    background: linear-gradient(90deg, var(--text-muted), color-mix(in srgb, var(--text-muted) 50%, var(--border)));
}

.contact-method::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), color-mix(in srgb, var(--accent) 45%, var(--border)));
    opacity: 0.85;
}

.contact-method:hover {
    border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
    box-shadow: 0 10px 28px rgba(7, 12, 24, 0.18);
    transform: translateY(-3px);
}

.contact-method:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

.contact-method-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: color-mix(in srgb, var(--accent) 14%, var(--bg-card));
    color: var(--accent);
    font-size: 1rem;
}

.contact-method-meta {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    min-width: 0;
    width: 100%;
}

.contact-method-label {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
}

.contact-method-value {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
    overflow-wrap: anywhere;
    word-break: break-word;
}

.contact-method-hint {
    margin-top: auto;
    padding-top: 0.35rem;
    font-size: 0.78rem;
    color: var(--accent);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.contact-method-hint i {
    font-size: 0.65rem;
    opacity: 0.85;
}

.contact-social {
    text-align: center;
    padding: 0 0.25rem;
}

.contact-social-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-muted);
    margin-bottom: 0.85rem;
}

.social-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    justify-content: center;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.55rem 0.95rem;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    text-decoration: none;
    color: var(--text-primary);
    font-size: 0.88rem;
    font-weight: 600;
    transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.social-links a i {
    color: var(--accent);
    font-size: 1.05rem;
}

.social-name {
    line-height: 1;
}

.social-links a:hover {
    background: color-mix(in srgb, var(--accent) 12%, var(--bg-card));
    border-color: color-mix(in srgb, var(--accent) 50%, var(--border));
    color: var(--text-primary);
    transform: translateY(-2px);
}

.contact-form-block {
    padding-top: 0.5rem;
    border-top: 1px solid var(--border);
}

.contact-form-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.35rem;
    text-align: center;
}

.contact-form-desc {
    color: var(--text-secondary);
    font-size: 0.94rem;
    text-align: center;
    max-width: 36rem;
    margin: 0 auto 1.35rem;
    line-height: 1.55;
}

.contact-form-block .form-group {
    margin-bottom: 0.85rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.85rem;
}

.btn-contact-submit {
    width: 100%;
    margin-top: 0.35rem;
    padding: 0.8rem 1rem;
    font-size: 1rem;
}

.form-group {
    margin-bottom: 0.8rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.35rem;
    font-size: 0.9rem;
    font-weight: 600;
}

.form-group input,
.form-group textarea {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.6rem 0.7rem;
    font: inherit;
    color: var(--text-primary);
    background: var(--bg-surface);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.form-group input:hover,
.form-group textarea:hover {
    border-color: color-mix(in srgb, var(--accent) 30%, var(--border));
}
.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent);
    outline: none;
}
.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

#form-message {
    margin-top: 0.75rem;
    font-size: 0.92rem;
    color: var(--text-secondary);
}

.contact-form-block #form-message {
    text-align: center;
}

.message.success {
    color: var(--success);
}

.message.error {
    color: #f87171;
}

footer {
    border-top: 1px solid var(--border);
    padding: 1.4rem 0;
    text-align: center;
    color: var(--text-muted);
}

/* scroll reveal */
.loading {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.35s ease, transform 0.35s ease;
}

.loading.loaded {
    opacity: 1;
    transform: translateY(0);
}

/* focus styles */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

@media (max-width: 920px) {
    .intro-grid {
        grid-template-columns: 1fr;
    }

    .contact-methods {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }
    .intro-section {
        min-height: auto;
        padding: 1.5rem 0 1.5rem;
    }
    .intro-about {
        min-height: auto;
        max-height: none;
        overflow: visible;
    }
    .intro-primary {
        order: -1;
    }
    .about-heading {
        white-space: normal;
    }
    .skills-showcase,
    .project-grid,
    .education-grid {
        grid-template-columns: 1fr;
    }
    .skills-showcase {
        grid-template-areas:
            "cloud"
            "s1"
            "s2"
            "s3"
            "s4";
    }
    .skills-cloud {
        min-height: 260px;
    }

    .timeline-item {
        grid-template-columns: 1fr;
    }
    .exp-stack {
        height: auto;
        min-height: 120px;
    }

    .timeline-date {
        padding-top: 0;
    }
    .cert-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 780px) {
    .mobile-menu-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    .nav-menu {
        position: fixed;
        top: 69px;
        right: -100%;
        width: min(330px, 86%);
        height: calc(100vh - 69px);
        background: var(--bg-surface);
        border-left: 1px solid var(--border);
        flex-direction: column;
        align-items: flex-start;
        padding: 1rem;
        transition: right 0.25s ease;
        overflow-y: auto;
    }

    .nav-menu.active {
        right: 0;
    }

    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }
    .cert-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 520px) {
    .intro-photo {
        width: 210px;
        height: 210px;
    }

    .about-heading {
        font-size: 1.12rem;
        line-height: 1.35;
    }

    .intro-about p {
        font-size: 0.97rem;
        line-height: 1.55;
    }

    .cert-modal-card {
        width: min(94vw, 560px);
        margin-top: 4vh;
    }
}