/* === Skip Link (Accessibility) === */
.skip-link {
    position: absolute;
    top: -100%;
    left: 0;
    background: var(--color-accent);
    color: #fff;
    padding: 0.75rem 1.5rem;
    z-index: 9999;
    font-weight: 600;
    text-decoration: none;
    transition: top 0.2s;
}

.skip-link:focus {
    top: 0;
}

/* === Reset & Base === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-bg: #ffffff;
    --color-bg-alt: #f8f9fa;
    --color-bg-warm: #fafaf9;
    --color-bg-cool: #f5f7fa;
    --color-bg-warm-hero: #fafbfe;
    --color-text: #1a1a2e;
    --color-text-muted: #6b7280;
    --color-accent: #2563eb;
    --color-accent-hover: #1d4ed8;
    --color-accent-light: rgba(37, 99, 235, 0.08);
    --color-border: #e5e7eb;
    --color-dark: #0f172a;
    --color-dark-text: #e2e8f0;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --max-width: 1100px;
    --nav-height: 64px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

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

a:hover {
    color: var(--color-accent-hover);
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* === Navigation === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    z-index: 1000;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
}

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

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--color-text);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s;
}

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

.nav-cta {
    background: var(--color-accent);
    color: #fff !important;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    transition: background 0.2s;
}

.nav-cta:hover {
    background: var(--color-accent-hover);
    color: #fff !important;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: 0.3s;
}

/* === Buttons === */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    border: 2px solid transparent;
}

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

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

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

.btn-outline:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* === Section Common === */
.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.section-subtitle {
    color: var(--color-text-muted);
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

/* === Hero === */
.hero {
    min-height: 70vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: var(--nav-height) 0 2rem;
    position: relative;
    background: linear-gradient(160deg, var(--color-bg) 0%, var(--color-bg-warm-hero) 100%);
    overflow: hidden;
}

.scroll-indicator {
    display: none;
}

.hero-greeting {
    color: var(--color-accent);
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 1rem;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero-title .accent {
    color: var(--color-accent);
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--color-text-muted);
    max-width: 550px;
    margin-bottom: 2rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.scroll-indicator {
    position: absolute;
    bottom: 4rem;
    left: 50%;
    transform: translateX(-50%);
    color: var(--color-text-muted);
    font-size: 0.85rem;
    animation: bounce 2s infinite;
}

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

/* === About === */
.about {
    padding: 6rem 0;
    background: var(--color-bg-cool);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.about-text p {
    margin-bottom: 1rem;
    color: var(--color-text-muted);
}

.about-skills h3 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
}

.skill-group {
    margin-bottom: 1.5rem;
}

.skill-group h4 {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.skill-tags span {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    padding: 0.35rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--color-text);
}

/* === Portfolio === */
.portfolio {
    padding: 6rem 0;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.project-card {
    border: 1px solid var(--color-border);
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
}

.project-image {
    height: 200px;
    background: var(--color-bg-alt);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.project-screenshot {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.project-placeholder {
    color: var(--color-accent);
    font-weight: 600;
    font-size: 1.1rem;
    letter-spacing: 0.02em;
}

.project-info {
    padding: 1.5rem;
}

.project-info h3 {
    font-size: 1.15rem;
    margin-bottom: 0.5rem;
}

.project-info p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 1rem;
}

.project-tags span {
    background: var(--color-bg-alt);
    padding: 0.25rem 0.6rem;
    border-radius: 4px;
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.project-links {
    display: flex;
    gap: 1rem;
}

.project-link {
    font-size: 0.9rem;
    font-weight: 500;
}

/* === Services === */
.services {
    padding: 6rem 0;
    background: var(--color-dark);
    color: var(--color-dark-text);
}

.services .section-subtitle {
    color: #94a3b8;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.service-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 2rem;
    transition: transform 0.2s, border-color 0.2s;
}

.service-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-accent);
}

.service-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.service-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.75rem;
}

.service-card p {
    color: #94a3b8;
    font-size: 0.9rem;
    margin-bottom: 1.25rem;
}

.service-card ul {
    list-style: none;
}

.service-card li {
    padding: 0.35rem 0;
    font-size: 0.9rem;
    color: #cbd5e1;
}

.service-card li::before {
    content: "✓ ";
    color: var(--color-accent);
    font-weight: 700;
}

.services-cta {
    text-align: center;
}

.services-cta p {
    color: #94a3b8;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

/* === Pricing === */
.pricing {
    padding: 6rem 0;
    background: var(--color-bg-warm);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.pricing-card {
    border: 1px solid var(--color-border);
    border-top: 3px solid var(--color-accent);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
}

.pricing-card h3 {
    font-size: 1.15rem;
    margin-bottom: 0.75rem;
}

.pricing-amount {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-accent);
    margin-bottom: 0.25rem;
}

.pricing-amount span {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text-muted);
}

.pricing-desc {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.pricing-card ul {
    list-style: none;
    text-align: left;
}

.pricing-card li {
    padding: 0.4rem 0;
    font-size: 0.9rem;
    color: var(--color-text-muted);
    border-bottom: 1px solid var(--color-border);
}

.pricing-card li:last-child {
    border-bottom: none;
}

.pricing-extra {
    text-align: center;
    margin-bottom: 1rem;
}

.pricing-extra p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.pricing-note {
    text-align: center;
}

.pricing-note p {
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

.pricing-addon-label {
    display: inline-block;
    background: var(--color-accent);
    color: #fff;
    font-size: 0.65rem;
    font-weight: 600;
    padding: 0.2rem 0.5rem;
    border-radius: 3px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.pricing-card-featured {
    border-color: var(--color-accent);
    border-width: 2px;
    position: relative;
    padding-top: 2.5rem;
}

.pricing-badge {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-accent);
    color: #fff;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.3rem 1rem;
    border-radius: 0 0 8px 8px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.pricing-extra-item {
    text-align: center;
    padding: 0.5rem 0;
    font-size: 0.95rem;
    color: var(--color-text-muted);
    border-bottom: 1px solid var(--color-border);
}

.pricing-extra-item:last-child {
    border-bottom: none;
}

.pricing-extra-item strong {
    color: var(--color-text);
}

/* === FAQ === */
.faq {
    padding: 6rem 0;
    background: var(--color-bg-cool);
}

.faq-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

.faq-item {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    overflow: hidden;
}

.faq-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 1.25rem 1.5rem;
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    text-align: left;
}

.faq-question {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--color-text);
}

.faq-icon {
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    margin-left: 1rem;
    position: relative;
}

.faq-icon::before,
.faq-icon::after {
    content: "";
    position: absolute;
    background: var(--color-text-muted);
    transition: transform 0.2s;
}

.faq-icon::before {
    top: 50%;
    left: 0;
    width: 16px;
    height: 2px;
    transform: translateY(-50%);
}

.faq-icon::after {
    top: 0;
    left: 50%;
    width: 2px;
    height: 16px;
    transform: translateX(-50%);
}

.faq-toggle[aria-expanded="true"] .faq-icon::after {
    transform: translateX(-50%) rotate(90deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-answer p {
    padding: 0 1.5rem 1.25rem;
    color: var(--color-text-muted);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* === Contact === */
.contact {
    padding: 6rem 0;
    background: var(--color-bg-warm);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
}

.contact-info h3 {
    font-size: 1.25rem;
    margin-bottom: 2rem;
}

.contact-item {
    margin-bottom: 1.5rem;
}

.contact-label {
    display: block;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.contact-socials {
    display: flex;
    gap: 1.5rem;
    margin-top: 2rem;
}

.contact-socials a {
    font-size: 0.9rem;
    font-weight: 500;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    padding: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color 0.2s;
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
}

.contact-form .btn {
    align-self: flex-start;
    margin-top: 0.5rem;
}

/* === Terms === */
.terms {
    padding: calc(var(--nav-height) + 4rem) 0 6rem;
    min-height: 100vh;
}

.terms h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2rem;
}

.terms h2 {
    font-size: 1.4rem;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
}

.terms h3 {
    font-size: 1.1rem;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

.terms p,
.terms li {
    color: var(--color-text-muted);
    margin-bottom: 0.75rem;
    line-height: 1.7;
}

.terms ol {
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}

.terms ol li {
    margin-bottom: 0.5rem;
}

.terms-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1.5rem;
}

.terms-table th,
.terms-table td {
    text-align: left;
    padding: 0.75rem;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.9rem;
}

.terms-table th {
    color: var(--color-text);
    font-weight: 600;
}

.terms-table td {
    color: var(--color-text-muted);
}

/* === Footer === */
.footer {
    padding: 2rem 0;
    border-top: 1px solid var(--color-border);
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* === Responsive === */
@media (max-width: 768px) {
    .hero {
        min-height: 100vh;
    }

    .scroll-indicator {
        display: block;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: var(--color-bg);
        flex-direction: column;
        padding: 1.5rem;
        gap: 1rem;
        border-bottom: 1px solid var(--color-border);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    }

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

    .nav-toggle {
        display: flex;
    }

    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .hero-actions {
        flex-direction: column;
    }

    .btn {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

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

/* === Scroll Animations === */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}