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

:root {
    --bg:           #07071a;
    --bg-2:         #0d0d22;
    --surface:      rgba(255,255,255,0.04);
    --surface-h:    rgba(255,255,255,0.07);
    --border:       rgba(255,255,255,0.08);
    --accent:       #6366f1;
    --accent-l:     #818cf8;
    --accent-glow:  rgba(99,102,241,0.28);
    --text:         #e2e8f0;
    --text-m:       #94a3b8;
    --text-d:       #64748b;
    --nav-bg:       rgba(7,7,26,0.82);
    --shadow:       0 4px 32px rgba(0,0,0,0.45);
    --r:            16px;
    --r-sm:         10px;
    --r-xs:         6px;
    --ease:         0.3s ease;
}

.light-mode {
    --bg:          #f8fafc;
    --bg-2:        #f1f5f9;
    --surface:     rgba(0,0,0,0.04);
    --surface-h:   rgba(0,0,0,0.07);
    --border:      rgba(0,0,0,0.09);
    --accent:      #4f46e5;
    --accent-l:    #6366f1;
    --accent-glow: rgba(79,70,229,0.18);
    --text:        #0f172a;
    --text-m:      #475569;
    --text-d:      #94a3b8;
    --nav-bg:      rgba(248,250,252,0.85);
    --shadow:      0 4px 24px rgba(0,0,0,0.1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    font-size: 16px;
    transition: background var(--ease), color var(--ease);
}

a {
    text-decoration: none;
    color: inherit;
}

img { display: block; max-width: 100%; }

/* ================================================================
   LAYOUT UTILITY
   ================================================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ================================================================
   NAVBAR
   ================================================================ */
.navbar {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 100;
    padding: 1.1rem 2rem;
    transition: padding var(--ease), background var(--ease), border var(--ease);
}

.navbar.scrolled {
    background: var(--nav-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 0.7rem 2rem;
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 2rem;
    position: relative;
}

.nav-logo {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}
.nav-logo span { color: var(--accent); }

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.2rem;
    list-style: none;
    margin: 0 auto;
}

.nav-link {
    padding: 0.45rem 1rem;
    border-radius: var(--r-xs);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-m);
    transition: color var(--ease), background var(--ease);
}
.nav-link:hover,
.nav-link.active {
    color: var(--text);
    background: var(--surface-h);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

.btn-github {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.5rem 1.1rem;
    border-radius: var(--r-xs);
    font-size: 0.875rem;
    font-weight: 600;
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text);
    transition: all var(--ease);
}
.btn-github:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.theme-toggle {
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text-m);
    width: 38px;
    height: 38px;
    border-radius: var(--r-xs);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    transition: all var(--ease);
}
.theme-toggle:hover {
    color: var(--text);
    background: var(--surface-h);
}

.nav-hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}
.nav-hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-m);
    border-radius: 2px;
    transition: all var(--ease);
}
.nav-hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ================================================================
   HERO
   ================================================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 6rem 2rem 4rem;
}

/* Subtle dot-grid background */
.hero-grid-bg {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle, rgba(255,255,255,0.06) 1px, transparent 1px);
    background-size: 36px 36px;
    pointer-events: none;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black, transparent);
    -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black, transparent);
}

.light-mode .hero-grid-bg {
    background-image:
        radial-gradient(circle, rgba(0,0,0,0.06) 1px, transparent 1px);
}

/* Ambient glow orbs */
.hero-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(90px);
    pointer-events: none;
}
.hero-orb-1 {
    width: 550px;
    height: 550px;
    background: radial-gradient(circle, rgba(99,102,241,0.35), transparent 70%);
    top: -120px;
    right: -80px;
    animation: float-1 12s ease-in-out infinite;
}
.hero-orb-2 {
    width: 420px;
    height: 420px;
    background: radial-gradient(circle, rgba(139,92,246,0.28), transparent 70%);
    bottom: -100px;
    left: -60px;
    animation: float-2 14s ease-in-out infinite;
}

@keyframes float-1 {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(-30px, 30px); }
}
@keyframes float-2 {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(25px, -25px); }
}

.hero-inner {
    max-width: 760px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 1.1rem;
    border-radius: 100px;
    background: var(--surface);
    border: 1px solid var(--border);
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-m);
    text-transform: uppercase;
    letter-spacing: 0.09em;
    margin-bottom: 2rem;
}
.hero-badge-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent);
    animation: pulse-dot 2.4s ease-in-out infinite;
    flex-shrink: 0;
}
@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50%       { opacity: 0.5; transform: scale(0.7); }
}

.hero-heading {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(2.8rem, 8vw, 5.2rem);
    font-weight: 700;
    line-height: 1.08;
    letter-spacing: -0.025em;
    margin-bottom: 1.5rem;
}
.hero-name {
    background: linear-gradient(135deg, var(--accent), var(--accent-l));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-sub {
    font-size: 1.05rem;
    color: var(--text-m);
    max-width: 540px;
    margin: 0 auto 2.75rem;
    line-height: 1.75;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Primary CTA */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.9rem 2rem;
    background: var(--accent);
    color: #fff;
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: var(--r-sm);
    transition: all var(--ease);
    box-shadow: 0 0 0 0 var(--accent-glow);
}
.btn-primary:hover {
    background: var(--accent-l);
    transform: translateY(-3px);
    box-shadow: 0 10px 28px var(--accent-glow);
}
.btn-primary i { transition: transform var(--ease); }
.btn-primary:hover i { transform: translateX(4px); }

/* Outline CTA */
.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.9rem 2rem;
    border: 1px solid var(--border);
    color: var(--text);
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: var(--r-sm);
    background: var(--surface);
    transition: all var(--ease);
}
.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(99,102,241,0.07);
    transform: translateY(-3px);
}

/* Scroll cue */
.hero-scroll-cue {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
}
.scroll-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-d);
    animation: bounce 2s ease-in-out infinite;
}
@keyframes bounce {
    0%, 100% { transform: translateY(0);   opacity: 0.35; }
    50%       { transform: translateY(8px); opacity: 1; }
}

/* ================================================================
   SECTION COMMONS
   ================================================================ */
.about    { padding: 8rem 0; }
.portfolio { padding: 8rem 0; background: var(--bg-2); }
.contact  { padding: 8rem 0; }

.section-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--accent);
    margin-bottom: 0.6rem;
}

.section-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.025em;
    margin-bottom: 0.5rem;
    line-height: 1.1;
}

.section-sub {
    font-size: 1rem;
    color: var(--text-m);
    max-width: 540px;
    line-height: 1.75;
    margin-bottom: 3rem;
}

/* Reveal on scroll */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ================================================================
   ABOUT
   ================================================================ */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4.5rem;
    margin-top: 3rem;
    align-items: start;
}

.about-text p {
    color: var(--text-m);
    line-height: 1.85;
    margin-bottom: 1.2rem;
    font-size: 0.975rem;
}

.about-info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.85rem;
    margin-top: 2rem;
}

.info-card {
    display: flex;
    align-items: flex-start;
    gap: 0.8rem;
    padding: 1rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-sm);
    transition: border-color var(--ease);
}
.info-card:hover { border-color: rgba(99,102,241,0.3); }
.info-card i {
    color: var(--accent);
    font-size: 0.95rem;
    margin-top: 0.18rem;
    flex-shrink: 0;
}
.info-card div {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    min-width: 0;
}
.info-label {
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.09em;
    color: var(--text-d);
}
.info-value {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Skills */
.skills-panel h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1.75rem;
}
.skills-list { display: flex; flex-direction: column; gap: 1.1rem; }

.skill-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.45rem;
}
.skill-meta span:last-child { color: var(--text-d); }

.skill-track {
    height: 5px;
    background: var(--surface-h);
    border-radius: 10px;
    overflow: hidden;
}
.skill-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--accent-l));
    border-radius: 10px;
    width: 0;
    transition: width 1.1s cubic-bezier(0.16,1,0.3,1);
}

/* ================================================================
   PORTFOLIO
   ================================================================ */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.4rem;
}

.project-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--r);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
}
.project-card:hover {
    border-color: rgba(99,102,241,0.45);
    transform: translateY(-5px);
    box-shadow: 0 16px 44px rgba(0,0,0,0.3), 0 0 0 1px rgba(99,102,241,0.18);
}

.project-visual {
    height: 130px;
    background: linear-gradient(135deg, var(--ga), var(--gb));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.4rem;
    color: rgba(255,255,255,0.55);
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
}
.project-visual::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 50%, rgba(0,0,0,0.25));
}
/* Subtle shimmer line at top */
.project-visual::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
}

.project-body {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    flex: 1;
    gap: 0.55rem;
}

.project-body h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.975rem;
    font-weight: 600;
    line-height: 1.35;
}

.project-body p {
    font-size: 0.825rem;
    color: var(--text-m);
    line-height: 1.65;
    flex: 1;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}
.project-tags span {
    font-size: 0.68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    padding: 0.18rem 0.6rem;
    border-radius: 100px;
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text-d);
}

.project-links {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.2rem;
    flex-wrap: wrap;
}

.proj-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.38rem 0.85rem;
    border-radius: var(--r-xs);
    font-size: 0.78rem;
    font-weight: 600;
    border: 1px solid var(--border);
    color: var(--text-m);
    background: var(--surface);
    transition: all var(--ease);
}
.proj-link:hover {
    color: var(--text);
    border-color: rgba(255,255,255,0.18);
    background: var(--surface-h);
}

.proj-link--live {
    color: var(--accent);
    border-color: rgba(99,102,241,0.35);
    background: rgba(99,102,241,0.07);
}
.proj-link--live:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

/* ================================================================
   CONTACT
   ================================================================ */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    max-width: 720px;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 1.1rem;
    padding: 1.5rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r);
    color: var(--text);
    transition: all var(--ease);
}
a.contact-card:hover {
    border-color: rgba(99,102,241,0.4);
    background: rgba(99,102,241,0.06);
    transform: translateY(-3px);
    box-shadow: 0 8px 28px rgba(0,0,0,0.15);
}

.contact-icon-wrap {
    width: 50px;
    height: 50px;
    border-radius: var(--r-sm);
    background: rgba(99,102,241,0.12);
    border: 1px solid rgba(99,102,241,0.22);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: var(--accent);
    flex-shrink: 0;
    transition: all var(--ease);
}
a.contact-card:hover .contact-icon-wrap {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.contact-card > div:last-child {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    min-width: 0;
}
.contact-label {
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.09em;
    color: var(--text-d);
}
.contact-value {
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ================================================================
   FOOTER
   ================================================================ */
.footer {
    padding: 2.25rem 2rem;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--text-d);
    font-size: 0.85rem;
}

/* ================================================================
   RESPONSIVE
   ================================================================ */

/* Tablet */
@media (max-width: 1024px) {
    .projects-grid { grid-template-columns: repeat(2, 1fr); }
}

/* Mobile nav breakpoint */
@media (max-width: 768px) {
    /* Nav */
    .nav-links {
        display: none;
        position: absolute;
        top: calc(100% + 0.5rem);
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        background: var(--nav-bg);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border: 1px solid var(--border);
        border-radius: var(--r-sm);
        padding: 0.75rem;
        gap: 0.2rem;
    }
    .nav-links.open { display: flex; }
    .nav-hamburger   { display: flex; }
    .btn-github span { display: none; }
    .btn-github      { padding: 0.5rem 0.7rem; }

    /* Layout */
    .about-grid    { grid-template-columns: 1fr; gap: 2.5rem; }
    .about-info-grid { grid-template-columns: 1fr 1fr; }
    .projects-grid { grid-template-columns: 1fr 1fr; }
    .contact-grid  { grid-template-columns: 1fr; }

    .about, .portfolio, .contact { padding: 5.5rem 0; }
}

/* Small mobile */
@media (max-width: 560px) {
    .projects-grid  { grid-template-columns: 1fr; }
    .about-info-grid { grid-template-columns: 1fr; }

    .hero-heading { font-size: 2.5rem; }
    .hero-actions { flex-direction: column; align-items: stretch; }
    .btn-primary, .btn-outline { justify-content: center; }

    .about, .portfolio, .contact { padding: 4.5rem 0; }
    .container { padding: 0 1.25rem; }
}