/* ============================================
   0. THEME CUSTOM PROPERTIES
   ============================================ */
:root {
    --bg:             #0d1520;
    --bg-alt:         #111827;
    --bg-card:        #141e2e;
    --bg-skill:       #1a2235;
    --bg-input:       #1a2235;
    --text:           #f0f0f0;
    --text-sub:       #c8d0e0;
    --text-muted:     #b0b0b0;
    --text-dim:       #888;
    --text-skill:     #c8d8f0;
    --text-skill-ai:  #a8c4f5;
    --accent:         #4f8ef7;
    --accent-rgb:     79, 142, 247;
    --border:         #2a3550;
    --border-card:    #1e2635;
    --border-input:   #333;
    --border-footer:  #222;
    --green:          #4ade80;
    --green-rgb:      74, 222, 128;
    --green-dark-rgb: 34, 197, 94;
    --cta:            #22c55e;
    --cta-hover:      #16a34a;
    --cta-text:       #fff;
    --bg-card-hover:  #1b2640;
}

[data-theme="light"] {
    --bg:             #f7f8fa;
    --bg-alt:         #eef0f5;
    --bg-card:        #ffffff;
    --bg-skill:       #eef3ff;
    --bg-input:       #ffffff;
    --text:           #1a1a2e;
    --text-sub:       #333344;
    --text-muted:     #555566;
    --text-dim:       #777;
    --text-skill:     #2a4a8a;
    --text-skill-ai:  #1a3a7a;
    --accent:         #4f8ef7;
    --accent-rgb:     79, 142, 247;
    --border:         #c8d4e8;
    --border-card:    #dde6f0;
    --border-input:   #ccd5e0;
    --border-footer:  #e0e0e0;
    --green:          #15803d;
    --green-rgb:      21, 128, 61;
    --green-dark-rgb: 21, 128, 61;
    --cta:            #16a34a;
    --cta-hover:      #15803d;
    --cta-text:       #fff;
    --bg-card-hover:  #f0f5ff;
}

/* ============================================
   1. RESET & BASE
   ============================================ */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

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

/* ============================================
   2. TYPOGRAPHY
   ============================================ */
h1, h2, h3 {
    line-height: 1.2;
    font-weight: 700;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 1.8rem; }
h3 { font-size: 1.1rem; margin-bottom: 0.5rem; }

a {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* ============================================
   3. LAYOUT
   ============================================ */
section {
    max-width: 900px;
    margin: 0 auto;
    padding: 5rem 1.5rem;
}

/* Full-width alternate background strip */
.bg-alt {
    background-color: var(--bg-alt);
    max-width: 100%;
    margin: 0;
    padding: 5rem calc(50vw - 450px + 1.5rem);
}

/* ============================================
   4. SECTION HEADINGS
   ============================================ */
section h2 {
    position: relative;
    padding-bottom: 0.75rem;
    margin-bottom: 2rem;
}

section h2::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 2.5rem;
    height: 3px;
    background-color: var(--accent);
    border-radius: 2px;
}

/* ============================================
   5. FOCUS STYLES (ACCESSIBILITY)
   ============================================ */
:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

#contactForm input:focus-visible,
#contactForm textarea:focus-visible {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.2);
}

/* ============================================
   5b. SCROLL ANIMATIONS
   ============================================ */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.from-left {
    transform: translateX(-32px);
}

.reveal.visible {
    opacity: 1;
    transform: translate(0, 0);
}

/* ============================================
   6. NAVIGATION
   ============================================ */
.site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 2rem;
    background-color: rgba(13, 21, 32, 0.88);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(var(--accent-rgb), 0.1);
    z-index: 100;
}

[data-theme="light"] .site-nav {
    background-color: rgba(247, 248, 250, 0.88);
}

.nav-logo {
    font-weight: 700;
    font-size: 1rem;
    color: var(--text);
    text-decoration: none;
}

.nav-logo:hover {
    text-decoration: none;
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    font-size: 0.9rem;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--accent);
    text-decoration: none;
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.lang-toggle,
.theme-toggle {
    background: transparent;
    border: 2px solid var(--accent);
    color: var(--accent);
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
    border-radius: 4px;
    transition: background-color 0.2s, color 0.2s;
    line-height: 1;
}

.lang-toggle:hover,
.theme-toggle:hover {
    background-color: var(--accent);
    color: var(--bg);
}

.theme-toggle {
    padding: 0.3rem 0.45rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle .material-symbols-outlined {
    font-size: 1.1rem;
}

.nav-hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.4rem;
}

.nav-hamburger span {
    display: block;
    width: 20px;
    height: 2px;
    background-color: var(--text);
    border-radius: 1px;
    transition: transform 0.25s, opacity 0.25s;
}

.nav-hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

.nav-hamburger.active span:nth-child(2) {
    opacity: 0;
}

.nav-hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
}

/* ============================================
   7. HERO
   ============================================ */
.hero {
    position: relative;
    max-width: 100%;
    margin: 0;
    padding: 10rem 1.5rem 6rem;
    text-align: center;
    background-color: var(--bg);
    background-image: radial-gradient(circle, rgba(var(--accent-rgb), 0.12) 1px, transparent 1px);
    background-size: 28px 28px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 700px;
    height: 500px;
    background: radial-gradient(ellipse, rgba(var(--accent-rgb), 0.07) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
    animation: heroFadeIn 0.7s ease forwards;
}

@keyframes heroFadeIn {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}

.hero-photo {
    display: block;
    width: 130px;
    height: 130px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1.5rem;
    border: 3px solid var(--accent);
}

/* photoGlow removed; single pulsing element (avail-dot) is enough */

.availability-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.3rem 1rem;
    background-color: rgba(var(--green-dark-rgb), 0.1);
    border: 1px solid rgba(var(--green-dark-rgb), 0.3);
    border-radius: 100px;
    font-size: 0.82rem;
    color: var(--green);
    letter-spacing: 0.03em;
    margin-bottom: 0.75rem;
}

.avail-dot {
    display: inline-block;
    width: 7px;
    height: 7px;
    background-color: var(--green);
    border-radius: 50%;
    animation: availPulse 2s ease-in-out infinite;
    flex-shrink: 0;
}

@keyframes availPulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(var(--green-rgb), 0.4); }
    50%       { opacity: 0.75; box-shadow: 0 0 0 4px rgba(var(--green-rgb), 0); }
}

.hero-label {
    display: inline-block;
    padding: 0.3rem 1rem;
    background-color: rgba(var(--accent-rgb), 0.12);
    border: 1px solid rgba(var(--accent-rgb), 0.35);
    border-radius: 100px;
    font-size: 0.85rem;
    color: var(--accent);
    letter-spacing: 0.04em;
    margin-bottom: 1.25rem;
}

.tagline {
    font-size: 1.15rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0.75rem auto 2rem;
}

.cta-button {
    display: inline-block;
    padding: 0.85rem 2.2rem;
    background-color: var(--cta);
    color: var(--cta-text);
    font-weight: 700;
    font-size: 1.05rem;
    border-radius: 6px;
    text-decoration: none;
    transition: background-color 0.2s;
    box-shadow: 0 2px 8px rgba(34, 197, 94, 0.25);
}

.cta-button:hover {
    background-color: var(--cta-hover);
    text-decoration: none;
}

/* ============================================
   8. ABOUT
   ============================================ */
.about p {
    max-width: 700px;
    color: var(--text-sub);
    margin-bottom: 1rem;
}

.about-anchor {
    display: inline-block;
    margin-top: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-dim);
}

/* ============================================
   9. SKILLS
   ============================================ */
.skills-group-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-dim);
    margin-bottom: 0.75rem;
    margin-top: 1.5rem;
}

.skills-group-label:first-of-type {
    margin-top: 0;
}

.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.skill-chip {
    padding: 0.5rem 1.1rem;
    background-color: var(--bg-skill);
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 0.9rem;
    color: var(--text-skill);
}

.skill-chip--ai {
    background-color: rgba(var(--accent-rgb), 0.08);
    border-color: rgba(var(--accent-rgb), 0.3);
    color: var(--text-skill-ai);
}

/* ============================================
   10. SERVICES
   ============================================ */
.services-intro {
    color: var(--text-muted);
    margin-bottom: 2rem;
    max-width: 600px;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.service-card {
    border: 1px solid var(--border);
    border-top: 3px solid var(--accent);
    border-radius: 6px;
    padding: 2rem 1.5rem;
    background-color: var(--bg-card);
    transition: transform 0.2s, background-color 0.2s, box-shadow 0.2s;
}

.service-card:hover {
    transform: translateY(-6px);
    background-color: var(--bg-card-hover);
    box-shadow: 0 12px 28px rgba(var(--accent-rgb), 0.12);
}

.service-icon {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--accent);
    opacity: 0.85;
    display: block;
}

.service-icon.material-symbols-outlined {
    font-variation-settings: 'FILL' 0, 'wght' 300, 'GRAD' 0, 'opsz' 32;
}

.service-card h3 {
    color: var(--accent);
}

.service-card p {
    color: var(--text-sub);
    font-size: 0.95rem;
}

.service-stat {
    margin-top: 0.75rem;
    font-size: 0.85rem;
    color: var(--text-dim);
    font-style: italic;
}

.service-tools {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: 1.25rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-card);
}

.service-tools span {
    padding: 0.2rem 0.65rem;
    background-color: rgba(var(--accent-rgb), 0.08);
    border: 1px solid rgba(var(--accent-rgb), 0.2);
    border-radius: 100px;
    font-size: 0.78rem;
    color: var(--accent);
}

/* ============================================
   10b. SECTION CTA (inline, within a section)
   ============================================ */
.section-cta {
    margin-top: 2.5rem;
    text-align: center;
}

.section-cta p {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

/* ============================================
   10c. RESULTS
   ============================================ */
.results-intro {
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 600px;
    font-size: 0.95rem;
}

.results-grid {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    max-width: 700px;
}

.result-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.result-label-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 1rem;
}

.result-label {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text);
}

.result-value {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--accent);
    white-space: nowrap;
}

.result-bar-track {
    height: 8px;
    background: var(--border);
    border-radius: 4px;
    overflow: hidden;
}

.result-bar {
    height: 100%;
    background: linear-gradient(to right, var(--accent), rgba(var(--accent-rgb), 0.5));
    border-radius: 4px;
    width: 0;
    transition: width 1.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.result-bar.animated {
    width: var(--target-pct);
}

.result-source {
    font-size: 0.78rem;
    color: var(--text-dim);
}


/* ============================================
   11. HOW I WORK
   ============================================ */
.process-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    position: relative;
}

.process-step {
    position: relative;
    padding: 1rem;
    border-radius: 6px;
    transition: background-color 0.2s;
}

.process-step:hover {
    background-color: rgba(var(--accent-rgb), 0.04);
}

.process-step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 1.1rem;
    right: -1rem;
    width: 2rem;
    height: 2px;
    background: linear-gradient(to right, var(--accent), rgba(var(--accent-rgb), 0.2));
}

.step-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent);
    opacity: 0.25;
    line-height: 1;
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.process-step h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.5rem;
}

.process-step p {
    color: var(--text-dim);
    font-size: 0.875rem;
    line-height: 1.5;
}

/* ============================================
   12. EXPERIENCE
   ============================================ */
.exp-list {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.exp-card {
    border-left: 3px solid var(--accent);
    padding: 1.25rem 1.5rem;
    background-color: var(--bg-card);
    border-radius: 0 6px 6px 0;
    transition: transform 0.2s, box-shadow 0.2s;
}

.exp-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 18px rgba(var(--accent-rgb), 0.1);
}

.exp-meta {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.25rem;
}

.exp-company {
    font-weight: 700;
    font-size: 1rem;
    color: var(--text);
}

.exp-period {
    font-size: 0.85rem;
    color: var(--text-dim);
}

.exp-role {
    color: var(--accent);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.4rem;
}

.exp-desc {
    color: var(--text-sub);
    font-size: 0.95rem;
}

.exp-link {
    display: inline-block;
    margin-top: 0.75rem;
    font-size: 0.85rem;
    color: var(--accent);
    font-weight: 600;
    transition: opacity 0.2s;
}

.exp-link:hover {
    opacity: 0.75;
    text-decoration: none;
}

/* ============================================
   13. CREDENTIALS
   ============================================ */
.credentials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.cred-card {
    border: 1px solid var(--border);
    border-top: 3px solid var(--accent);
    border-radius: 6px;
    padding: 1.75rem 1.5rem;
    background-color: var(--bg-card);
    transition: transform 0.2s, box-shadow 0.2s;
}

.cred-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 18px rgba(var(--accent-rgb), 0.1);
}

.cred-type {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: rgba(var(--accent-rgb), 0.12);
    border: 1px solid rgba(var(--accent-rgb), 0.3);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 0.03em;
    margin-bottom: 0.75rem;
}

.cred-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.3rem;
}

.cred-institution {
    color: var(--accent);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.cred-detail {
    color: var(--text-dim);
    font-size: 0.85rem;
}

.credentials-grid--2col {
    grid-template-columns: repeat(2, 1fr);
}

.cred-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: 0.75rem;
}

.cred-chips span {
    padding: 0.2rem 0.65rem;
    background-color: rgba(var(--accent-rgb), 0.08);
    border: 1px solid rgba(var(--accent-rgb), 0.2);
    border-radius: 100px;
    font-size: 0.78rem;
    color: var(--accent);
}

/* ============================================
   14. CONTACT
   ============================================ */
.contact-subtext {
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.pricing-hint {
    font-size: 0.9rem;
    color: var(--text-dim);
    margin-bottom: 2rem;
    padding: 0.6rem 1rem;
    border-left: 2px solid rgba(var(--accent-rgb), 0.4);
}

#contactForm {
    max-width: 500px;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

#contactForm label {
    font-weight: 600;
    font-size: 0.9rem;
    margin-top: 0.75rem;
}

#contactForm input,
#contactForm textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    background-color: var(--bg-input);
    border: 1px solid var(--border-input);
    border-radius: 4px;
    color: var(--text);
    font-family: inherit;
    font-size: 1rem;
}

#contactForm input:focus,
#contactForm textarea:focus {
    border-color: var(--accent);
}

#contactForm button[type="submit"] {
    margin-top: 1rem;
    padding: 0.75rem;
    background-color: var(--cta);
    color: var(--cta-text);
    font-weight: 700;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.2s;
}

#contactForm button[type="submit"]:hover {
    background-color: var(--cta-hover);
}

.form-thanks {
    margin-top: 1.5rem;
    color: var(--accent);
    font-weight: 600;
}

/* ============================================
   15. FOOTER
   ============================================ */
.footer {
    text-align: center;
    padding: 2.5rem 1.5rem;
    border-top: 1px solid var(--border-footer);
    font-size: 0.9rem;
    color: var(--text-dim);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 0.75rem;
}

/* ============================================
   16. REDUCED MOTION
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    .service-card,
    .exp-card,
    .cred-card {
        transition: background-color 0.2s ease, box-shadow 0.2s ease;
    }

    .service-card:hover,
    .exp-card:hover,
    .cred-card:hover {
        transform: none;
    }
}

/* ============================================
   17. RESPONSIVE
   ============================================ */
@media (max-width: 900px) {
    .bg-alt {
        padding: 5rem 1.5rem;
    }
}

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.4rem; }

    section {
        padding: 3rem 1.25rem;
    }

    .bg-alt {
        padding: 3rem 1.25rem;
    }

    .services-grid,
    .credentials-grid {
        grid-template-columns: 1fr;
    }

    .process-steps {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .process-step:not(:last-child)::after {
        display: none;
    }

    .site-nav {
        padding: 0.75rem 1.25rem;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background-color: rgba(13, 21, 32, 0.95);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        padding: 0.5rem 1.25rem;
        gap: 0;
        border-bottom: 1px solid var(--border);
    }

    [data-theme="light"] .nav-links {
        background-color: rgba(247, 248, 250, 0.95);
    }

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

    .nav-links a {
        padding: 0.75rem 0;
        border-bottom: 1px solid var(--border);
    }

    .nav-links a:last-child {
        border-bottom: none;
    }

    .nav-hamburger {
        display: flex;
    }

    .hero {
        padding: 8rem 1.25rem 4rem;
    }
}