/* ============================================================
   DESIGN TOKENS — change colors/spacing/fonts here only
   ============================================================ */
:root {
    /* Colors */
    --color-bg:           #f4f3ef;
    --color-surface:      #ffffff;
    --color-surface-hover:#f8f7f4;
    --color-border:       rgba(0 0 0 / 0.09);
    --color-border-accent:rgba(28 48 82 / 0.35);
    --color-text-primary: #111827;
    --color-text-muted:   #6b7280;
    --color-accent-1:     #1c3052;  /* navy  */
    --color-accent-2:     #2a4a7f;  /* mid navy */
    --color-accent-3:     #b91c1c;  /* red   */
    --color-success:      #059669;

    /* Gradients */
    --gradient-brand: linear-gradient(135deg, #1c3052, #2a4a7f);
    --gradient-text:  linear-gradient(135deg, #1c3052, #b91c1c);
    --gradient-glow:  0 0 40px rgba(28 48 82 / 0.15);

    /* Typography */
    --font-display: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', sans-serif;
    --font-body:    'Inter', sans-serif;

    /* Spacing scale */
    --space-1:  4px;
    --space-2:  8px;
    --space-3:  12px;
    --space-4:  16px;
    --space-5:  20px;
    --space-6:  24px;
    --space-8:  32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --space-20: 80px;
    --space-24: 96px;

    /* Shape */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Motion */
    --ease-out:  cubic-bezier(0.4, 0, 0.2, 1);
    --duration:  0.3s;
}

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

html { scroll-behavior: smooth; }

body {
    background: var(--color-bg);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    overflow-x: hidden;
}

img { display: block; max-width: 100%; }
a   { color: inherit; }
ul  { list-style: none; }

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb { background: var(--color-accent-1); border-radius: 3px; opacity: 0.5; }

/* ============================================================
   LAYOUT HELPERS
   ============================================================ */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-8);
}

.section-label {
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent-3);  /* red — stands out on light bg */
    margin-bottom: var(--space-3);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(32px, 4.5vw, 52px);
    font-weight: 700;
    line-height: 1.1;
    color: var(--color-text-primary);
}

.section-rule {
    width: 48px;
    height: 3px;
    margin-top: var(--space-4);
    background: var(--gradient-brand);
    border-radius: 2px;
}

.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Scroll-reveal — JS adds .is-visible */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}
.reveal.is-visible {
    opacity: 1;
    transform: none;
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* ============================================================
   NAVIGATION
   ============================================================ */
.site-header {
    position: fixed;
    inset-block-start: 0;
    inset-inline: 0;
    z-index: 100;
    transition: background var(--duration) var(--ease-out),
                border-color var(--duration) var(--ease-out),
                padding var(--duration) var(--ease-out);
}

.site-header.scrolled {
    background: rgba(244 243 239 / 0.96);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 1px 12px rgba(0 0 0 / 0.06);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-block: var(--space-5);
    transition: padding-block var(--duration) var(--ease-out);
}

.site-header.scrolled .nav-inner {
    padding-block: var(--space-3);
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 700;
    text-decoration: none;
    color: var(--color-text-primary);
}

.nav-logo span { color: var(--color-accent-3); }

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.nav-links a {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-muted);
    text-decoration: none;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-sm);
    transition: color var(--duration), background var(--duration);
}

.nav-links a:hover {
    color: var(--color-text-primary);
    background: var(--color-surface);
}

/* hamburger */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-text-primary);
    font-size: 22px;
    cursor: pointer;
    padding: var(--space-2);
    z-index: 101;
}

/* mobile drawer */
.nav-drawer {
    position: fixed;
    inset-block: 0;
    inset-inline-end: -100%;
    width: 240px;
    background: rgba(244 243 239 / 0.98);
    backdrop-filter: blur(20px);
    border-left: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    padding: 80px var(--space-8) var(--space-8);
    gap: var(--space-1);
    transition: inset-inline-end 0.4s var(--ease-out);
    z-index: 100;
}

.nav-drawer.open { inset-inline-end: 0; }

.nav-drawer a {
    font-size: 16px;
    font-weight: 500;
    color: var(--color-text-muted);
    text-decoration: none;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-sm);
    transition: color var(--duration), background var(--duration);
}

.nav-drawer a:hover {
    color: var(--color-text-primary);
    background: var(--color-surface);
}

.drawer-close {
    position: absolute;
    top: var(--space-6);
    right: var(--space-6);
    background: none;
    border: none;
    color: var(--color-text-primary);
    font-size: 22px;
    cursor: pointer;
}

/* ============================================================
   HERO
   ============================================================ */
#hero {
    position: relative;
    min-height: 100svh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

/* subtle dot-grid */
#hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(0 0 0 / 0.07) 1px, transparent 1px);
    background-size: 32px 32px;
    pointer-events: none;
}

/* gradient orbs */
.hero-orb {
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
    filter: blur(100px);
}

.hero-orb--purple {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(28 48 82 / 0.07) 0%, transparent 70%);
    top: -150px;
    right: -150px;
}

.hero-orb--cyan {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(185 28 28 / 0.05) 0%, transparent 70%);
    bottom: -100px;
    left: 5%;
}

.hero-content {
    position: relative;
    z-index: 1;
    padding-block: 120px var(--space-20);
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-accent-1);
    margin-bottom: var(--space-6);
}

.hero-eyebrow::before {
    content: '';
    width: 28px;
    height: 2px;
    background: var(--color-accent-3);  /* red rule */
    border-radius: 1px;
    flex-shrink: 0;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(44px, 7.5vw, 88px);
    font-weight: 700;
    line-height: 1.04;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-6);
}

.hero-sub {
    font-size: clamp(16px, 2vw, 19px);
    color: var(--color-text-muted);
    max-width: 480px;
    line-height: 1.7;
    margin-bottom: var(--space-10);
}

.hero-cta {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: 13px var(--space-8);
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 600;
    font-family: var(--font-body);
    text-decoration: none;
    cursor: pointer;
    transition: transform var(--duration) var(--ease-out),
                box-shadow var(--duration) var(--ease-out);
}

.btn--primary {
    background: var(--gradient-brand);
    color: #fff;
    border: none;
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(124 58 237 / 0.4);
}

.btn--outline {
    background: transparent;
    color: var(--color-text-primary);
    border: 1px solid var(--color-border-accent);
}

.btn--outline:hover {
    background: rgba(124 58 237 / 0.1);
    border-color: var(--color-accent-1);
    transform: translateY(-2px);
}

/* ============================================================
   ABOUT
   ============================================================ */
#about {
    padding-block: var(--space-24);
}

.about-grid {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: var(--space-16);
    align-items: stretch;
}

.about-photo-wrap {
    position: relative;
    height: 100%;
}

/* gradient ring behind photo */
.about-photo-wrap::before {
    content: '';
    position: absolute;
    inset: -3px;
    background: var(--gradient-brand);
    border-radius: calc(var(--radius-lg) + 3px);
    z-index: 0;
}

.about-photo-wrap img {
    position: relative;
    z-index: 1;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
    display: block;
    border-radius: var(--radius-lg);
    transition: filter var(--duration);
}

.about-photo-wrap:hover img { filter: brightness(1.05); }

.about-bio {
    font-size: 17px;
    color: var(--color-text-muted);
    line-height: 1.8;
    margin-block: var(--space-6) var(--space-8);
}

/* Tabs */
.tabs-nav {
    display: flex;
    gap: var(--space-1);
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--space-6);
}

.tab-btn {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-muted);
    background: none;
    border: 1px solid transparent;
    border-bottom: none;
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    padding: var(--space-2) var(--space-5);
    cursor: pointer;
    position: relative;
    bottom: -1px;
    transition: color var(--duration), background var(--duration), border-color var(--duration);
}

.tab-btn:hover { color: var(--color-text-primary); }

.tab-btn.active {
    color: var(--color-text-primary);
    background: var(--color-surface);
    border-color: var(--color-border);
}

/* hide the bottom border underneath the active tab */
.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--color-bg);
}

.tab-panel { display: none; }
.tab-panel.active {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    animation: fadeIn 0.25s var(--ease-out);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: none; }
}

.tab-item {
    padding: var(--space-4) var(--space-5);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 15px;
    color: var(--color-text-muted);
    line-height: 1.6;
    transition: border-color var(--duration);
}

.tab-item:hover { border-color: var(--color-border-accent); }

.tab-item strong {
    display: block;
    font-size: 13px;
    font-weight: 700;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-1);
}

.tab-item a {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color var(--duration);
}

.tab-item a:hover { color: var(--color-accent-3); }

/* ============================================================
   SERVICES
   ============================================================ */
#services {
    padding-block: var(--space-24);
    background: linear-gradient(to bottom, transparent, rgba(124 58 237 / 0.04) 50%, transparent);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--space-6);
    margin-top: var(--space-12);
}

.service-card {
    position: relative;
    padding: var(--space-10) var(--space-8);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: transform var(--duration) var(--ease-out),
                border-color var(--duration),
                box-shadow var(--duration);
}

/* top gradient accent bar */
.service-card::before {
    content: '';
    position: absolute;
    inset-block-start: 0;
    inset-inline: 0;
    height: 2px;
    background: var(--gradient-brand);
    opacity: 0;
    transition: opacity var(--duration);
}

.service-card:hover {
    transform: translateY(-6px);
    border-color: var(--color-border-accent);
    box-shadow: var(--gradient-glow);
}

.service-card:hover::before { opacity: 1; }

.service-icon {
    font-size: 32px;
    margin-bottom: var(--space-6);
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
}

.service-card h2 {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-3);
}

.service-card p {
    font-size: 15px;
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* ============================================================
   PROJECTS
   ============================================================ */
#projects {
    padding-block: var(--space-24);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
    margin-top: var(--space-12);
}

.project-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: transform var(--duration) var(--ease-out),
                border-color var(--duration),
                box-shadow var(--duration);
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-border-accent);
    box-shadow: var(--gradient-glow);
}

.project-thumb {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16 / 9;
    background: var(--color-surface);
}

.project-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.85);
    transition: transform 0.5s var(--ease-out), filter 0.5s var(--ease-out);
}

.project-card:hover .project-thumb img {
    transform: scale(1.06);
    filter: brightness(0.55);
}

.project-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(10 15 30 / 0.92) 40%, rgba(28 48 82 / 0.4) 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--space-6);
    opacity: 0;
    transition: opacity 0.4s var(--ease-out);
}

.project-card:hover .project-overlay { opacity: 1; }

.project-overlay p {
    font-size: 14px;
    color: var(--color-text-muted);
    margin-bottom: var(--space-4);
    line-height: 1.5;
}

.project-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    background: var(--gradient-brand);
    border-radius: 50%;
    color: #fff;
    font-size: 16px;
    text-decoration: none;
    transition: transform var(--duration), box-shadow var(--duration);
}

.project-link:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 20px rgba(124 58 237 / 0.5);
}

.project-info {
    padding: var(--space-5) var(--space-6);
    border-top: 1px solid var(--color-border);
}

.project-info h3 {
    font-family: var(--font-display);
    font-size: 17px;
    font-weight: 600;
    color: var(--color-text-primary);
}

.project-info p {
    font-size: 13px;
    color: var(--color-text-muted);
    margin-top: var(--space-1);
}

.project-thumb--text .project-thumb-placeholder {
    width: 100%;
    height: 100%;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, rgba(28 48 82 / 0.08), rgba(185 28 28 / 0.06));
}

.project-thumb--text .project-thumb-placeholder i {
    font-size: 56px;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.project-badge {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-accent-3);
    background: rgba(6 182 212 / 0.12);
    border: 1px solid rgba(6 182 212 / 0.3);
    border-radius: 4px;
    padding: 2px var(--space-2);
    margin-top: var(--space-2);
}

/* ============================================================
   CONTACT
   ============================================================ */
#contact {
    padding-block: var(--space-24) 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.8fr;
    gap: var(--space-16);
    align-items: start;
}

.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: 0;
    margin-block: var(--space-8);
}

.contact-info-item {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding-block: var(--space-4);
    border-bottom: 1px solid var(--color-border);
    font-size: 15px;
    color: var(--color-text-muted);
}

.contact-info-item:last-child { border-bottom: none; }

.contact-info-item .icon {
    width: 38px;
    height: 38px;
    background: var(--gradient-brand);
    border-radius: var(--radius-sm);
    display: grid;
    place-items: center;
    font-size: 15px;
    color: #fff;
    flex-shrink: 0;
}

.social-row {
    display: flex;
    gap: var(--space-3);
    margin-block: var(--space-8);
}

.social-row a {
    width: 42px;
    height: 42px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    display: grid;
    place-items: center;
    font-size: 17px;
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color var(--duration), background var(--duration),
                border-color var(--duration), transform var(--duration);
}

.social-row a:hover {
    color: var(--color-text-primary);
    background: var(--color-surface-hover);
    border-color: var(--color-border-accent);
    transform: translateY(-3px);
}

/* Form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 13px var(--space-5);
    color: var(--color-text-primary);
    font-size: 15px;
    font-family: var(--font-body);
    outline: none;
    transition: border-color var(--duration), box-shadow var(--duration);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--color-text-muted);
    opacity: 0.7;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--color-accent-1);
    box-shadow: 0 0 0 3px rgba(124 58 237 / 0.15);
}

.contact-form textarea {
    resize: vertical;
    min-height: 130px;
}

#form-msg {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-success);
    min-height: 20px;
}

/* ============================================================
   FOOTER
   ============================================================ */
footer {
    margin-top: var(--space-20);
    padding-block: var(--space-6);
    border-top: 1px solid var(--color-border);
}

footer .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-4);
}

footer p {
    font-size: 14px;
    color: var(--color-text-muted);
}

.footer-links {
    display: flex;
    gap: var(--space-6);
}

.footer-links a {
    font-size: 14px;
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color var(--duration);
}

.footer-links a:hover { color: var(--color-text-primary); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
    .about-grid { grid-template-columns: 1fr; }
    .about-photo-wrap { max-width: 320px; }
    .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
    .container { padding-inline: var(--space-5); }

    .nav-links  { display: none; }
    .nav-toggle { display: block; }

    .hero-cta { flex-direction: column; }
    .btn { text-align: center; justify-content: center; }

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

    footer .container { flex-direction: column; text-align: center; }
}