/* =====================================================
   PORTFOLIO — style.css
   Author : Abdullahi Ibrahim
   Theme  : Dark & Modern — Electric Cyan Accent
===================================================== */


/* =====================================================
   1. CSS CUSTOM PROPERTIES
===================================================== */
:root {
    /* Backgrounds */
    --bg:           #0a0a0a;
    --bg-2:         #111111;
    --bg-card:      #141414;
    --bg-card-h:    #1a1a1a;

    /* Accent */
    --accent:       #00d4ff;
    --accent-dim:   rgba(0, 212, 255, 0.10);
    --accent-glow:  rgba(0, 212, 255, 0.30);
    --accent-2:     #a78bfa;          /* purple used in gradient pairs */

    /* Text */
    --t1:           #ffffff;
    --t2:           #9a9a9a;
    --t3:           #4a4a4a;

    /* Borders */
    --border:       rgba(255, 255, 255, 0.07);
    --border-a:     rgba(0, 212, 255, 0.22);

    /* Fonts */
    --font:         'Inter', sans-serif;
    --mono:         'Space Mono', monospace;

    /* Layout */
    --nav-h:        68px;
    --pad-section:  110px;
    --container:    1180px;
    --radius:       12px;
    --radius-lg:    20px;

    /* Motion */
    --ease:         cubic-bezier(0.4, 0, 0.2, 1);
    --t:            0.3s;
    --t-slow:       0.6s;
}


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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-h);
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--t1);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

button { font-family: var(--font); }


/* =====================================================
   3. UTILITY
===================================================== */
.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

.section { padding: var(--pad-section) 0; }

/* Cyan-to-purple gradient text */
.gradient-text {
    background: linear-gradient(130deg, var(--accent) 10%, var(--accent-2) 90%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}


/* =====================================================
   4. SCROLL FADE — Intersection Observer hook
      JS adds .visible when element enters viewport
===================================================== */
.scroll-fade {
    opacity: 0;
    transform: translateY(36px);
    transition: opacity 0.75s var(--ease), transform 0.75s var(--ease);
}
.scroll-fade.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Hero fade-in (JS triggers immediately on load) */
.fade-in {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.85s var(--ease), transform 0.85s var(--ease);
}
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}


/* =====================================================
   5. NAVIGATION
===================================================== */
.navbar {
    position: fixed;
    inset: 0 0 auto 0;
    height: var(--nav-h);
    z-index: 1000;
    background: rgba(10, 10, 10, 0.75);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: background var(--t) var(--ease),
                box-shadow  var(--t) var(--ease);
}
.navbar.scrolled {
    background: rgba(10, 10, 10, 0.96);
    box-shadow: 0 4px 32px rgba(0, 0, 0, 0.55);
}

.nav-container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Logo */
.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    transition: opacity var(--t);
}
.nav-logo:hover { opacity: 0.8; }

.logo-badge {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    background: var(--accent);
    color: #000;
    font-family: var(--mono);
    font-size: 0.72rem;
    font-weight: 700;
    border-radius: 8px;
    letter-spacing: 0;
    flex-shrink: 0;
}

.logo-name {
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--t1);
}

/* Desktop links */
.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--t2);
    padding: 7px 15px;
    border-radius: 8px;
    transition: color var(--t), background var(--t);
}
.nav-link:hover {
    color: var(--t1);
    background: var(--accent-dim);
}
.nav-link.active {
    color: var(--accent);
    background: var(--accent-dim);
}

/* Hamburger (hidden on desktop) */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 38px;
    height: 38px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    border-radius: 8px;
    transition: background var(--t);
}
.hamburger:hover { background: var(--accent-dim); }

.bar {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--t1);
    border-radius: 2px;
    transition: transform var(--t) var(--ease), opacity var(--t);
}

/* Animated X state */
.hamburger.active .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active .bar:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.active .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }


/* =====================================================
   6. HERO
===================================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 24px;
    overflow: hidden;
}

/* Particle canvas */
#particleCanvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

/* Radial glow behind the name */
.hero-glow {
    position: absolute;
    top: 35%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 700px;
    height: 500px;
    background: radial-gradient(ellipse, rgba(0, 212, 255, 0.055) 0%, transparent 70%);
    pointer-events: none;
    z-index: 1;
}

/* Bottom fade-to-bg */
.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 220px;
    background: linear-gradient(to bottom, transparent, var(--bg));
    pointer-events: none;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 780px;
}

/* Status badge */
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--t2);
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 6px 16px;
    border-radius: 50px;
    margin-bottom: 30px;
    letter-spacing: 0.04em;
}
.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #22c55e;
    box-shadow: 0 0 8px #22c55e;
    animation: blink 2.4s infinite;
}
@keyframes blink {
    0%, 100% { box-shadow: 0 0 8px #22c55e; }
    50%       { box-shadow: 0 0 18px #22c55e; }
}

/* Name */
.hero-name {
    font-size: clamp(3.2rem, 11vw, 7rem);
    font-weight: 900;
    letter-spacing: -0.04em;
    line-height: 1.0;
    margin-bottom: 22px;
}

/* Tagline (mono, accent) */
.hero-tagline {
    font-family: var(--mono);
    font-size: clamp(0.78rem, 1.8vw, 0.95rem);
    font-weight: 400;
    color: var(--accent);
    letter-spacing: 0.10em;
    text-transform: uppercase;
    margin-bottom: 14px;
}

/* Subtitle */
.hero-subtitle {
    font-size: clamp(1rem, 2.2vw, 1.15rem);
    color: var(--t2);
    line-height: 1.75;
    max-width: 520px;
    margin: 0 auto 36px;
}

/* CTA row */
.hero-cta {
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 36px;
}

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    padding: 13px 26px;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    transition: transform var(--t) var(--ease),
                background var(--t),
                box-shadow  var(--t),
                border-color var(--t),
                color var(--t);
    text-decoration: none;
    letter-spacing: 0.01em;
}
.btn i { transition: transform var(--t) var(--ease); }

/* Primary — filled cyan */
.btn-primary {
    background: var(--accent);
    color: #000;
}
.btn-primary:hover {
    background: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 28px var(--accent-glow);
}
.btn-primary:hover i { transform: translateX(4px); }

/* Outline */
.btn-outline {
    background: transparent;
    color: var(--t1);
    border: 1px solid var(--border);
}
.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-dim);
    transform: translateY(-2px);
}

/* Full-width variant */
.btn-full { width: 100%; justify-content: center; }

/* Location pill */
.hero-location {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-family: var(--mono);
    font-size: 0.82rem;
    color: var(--t3);
}
.hero-location i { color: var(--accent); font-size: 0.78rem; }

/* Scroll indicator line */
.scroll-indicator {
    position: absolute;
    bottom: 38px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}
.scroll-line {
    width: 1px;
    height: 56px;
    background: linear-gradient(to bottom, transparent, var(--accent));
    animation: scrollPulse 2.2s infinite;
}
@keyframes scrollPulse {
    0%   { opacity: 0; transform: scaleY(0); transform-origin: top; }
    40%  { opacity: 1; }
    100% { opacity: 0; transform: scaleY(1); transform-origin: top; }
}


/* =====================================================
   7. SECTION HEADERS (shared across all sections)
===================================================== */
.section-header { margin-bottom: 60px; }

.section-label {
    display: inline-block;
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--accent);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3.4rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 10px;
}

.section-sub {
    font-size: 1rem;
    color: var(--t2);
    max-width: 480px;
}


/* =====================================================
   8. ABOUT SECTION
===================================================== */
.about {
    background: var(--bg-2);
    position: relative;
}
.about::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-a), transparent);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 72px;
    align-items: start;
}

/* ── Bio ── */
.name-chip {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: var(--accent-dim);
    border: 1px solid var(--border-a);
    border-radius: var(--radius);
    padding: 14px 18px;
    margin-bottom: 26px;
}
.chip-label {
    font-family: var(--mono);
    font-size: 0.68rem;
    color: var(--accent);
    letter-spacing: 0.12em;
    text-transform: uppercase;
}
.chip-value {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--t1);
}

.about-text {
    font-size: 0.97rem;
    color: var(--t2);
    line-height: 1.8;
    margin-bottom: 16px;
}
.about-text strong { color: var(--t1); font-weight: 600; }

.about-details {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 26px;
    padding-top: 26px;
    border-top: 1px solid var(--border);
}
.detail-row {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.9rem;
    color: var(--t2);
}
.detail-row i {
    width: 16px;
    color: var(--accent);
    font-size: 0.82rem;
    flex-shrink: 0;
}
.detail-row a { transition: color var(--t); }
.detail-row a:hover { color: var(--accent); }

/* ── Skills ── */
.skills-heading {
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    margin-bottom: 20px;
}

.skills-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.skill-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px;
    display: flex;
    flex-direction: column;
    gap: 9px;
    transition: border-color var(--t), background var(--t), transform var(--t) var(--ease), box-shadow var(--t);
}
.skill-card:hover {
    border-color: var(--border-a);
    background: var(--bg-card-h);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}

.skill-icon {
    font-size: 1.55rem;
    color: var(--accent);
}

.skill-name {
    font-size: 0.83rem;
    font-weight: 600;
}

/* Skill progress bar */
.skill-bar {
    height: 3px;
    background: var(--border);
    border-radius: 2px;
    overflow: hidden;
}
.skill-fill {
    height: 100%;
    width: var(--fill);
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    border-radius: 2px;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 1.1s var(--ease) 0.2s;
}
/* JS adds .animated to the grid when in view */
.skills-grid.animated .skill-fill {
    transform: scaleX(1);
}


/* =====================================================
   9. PROJECTS SECTION
===================================================== */
.projects { background: var(--bg); }

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
}

.project-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    /* JS handles the transform/tilt — only non-transform styles here */
    transition: border-color var(--t),
                box-shadow   var(--t),
                transform    0.18s var(--ease);
}
.project-card:hover {
    border-color: var(--border-a);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
}

.card-inner {
    position: relative;
    z-index: 1;
    padding: 30px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    height: 100%;
}

/* Radial top-glow overlay (appears on hover) */
.card-glow {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 90% 60% at 50% 0%,
        rgba(0, 212, 255, 0.09) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s;
    pointer-events: none;
}
.project-card:hover .card-glow { opacity: 1; }

.card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-num {
    font-family: var(--mono);
    font-size: 0.68rem;
    color: var(--t3);
    letter-spacing: 0.06em;
}

.card-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}
.tag {
    font-family: var(--mono);
    font-size: 0.68rem;
    font-weight: 700;
    color: var(--accent);
    background: var(--accent-dim);
    border: 1px solid var(--border-a);
    padding: 3px 9px;
    border-radius: 50px;
    letter-spacing: 0.03em;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.card-desc {
    font-size: 0.88rem;
    color: var(--t2);
    line-height: 1.72;
    flex: 1;
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.84rem;
    font-weight: 600;
    color: var(--accent);
    margin-top: auto;
    width: fit-content;
    transition: gap var(--t), color var(--t);
}
.card-link:hover { gap: 12px; color: #fff; }
.card-link i { font-size: 0.78rem; }


/* =====================================================
   10. CONTACT SECTION
===================================================== */
.contact {
    background: var(--bg-2);
    position: relative;
}
.contact::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-a), transparent);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: 72px;
    align-items: start;
}

.contact-heading {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 10px;
}
.contact-body {
    font-size: 0.95rem;
    color: var(--t2);
    line-height: 1.75;
    margin-bottom: 32px;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 15px 18px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: border-color var(--t), background var(--t), transform var(--t) var(--ease);
}
.contact-link:hover {
    border-color: var(--border-a);
    background: var(--bg-card-h);
    transform: translateX(8px);
}

.link-icon {
    width: 40px;
    height: 40px;
    display: grid;
    place-items: center;
    background: var(--accent-dim);
    border-radius: 10px;
    color: var(--accent);
    font-size: 1rem;
    flex-shrink: 0;
}
.link-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.link-label {
    font-family: var(--mono);
    font-size: 0.67rem;
    color: var(--t3);
    letter-spacing: 0.10em;
    text-transform: uppercase;
}
.link-value {
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--t1);
}

/* Contact form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 7px;
}

.form-label {
    font-family: var(--mono);
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--t2);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.form-input {
    width: 100%;
    padding: 13px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--t1);
    font-family: var(--font);
    font-size: 0.93rem;
    outline: none;
    transition: border-color var(--t), background var(--t), box-shadow var(--t);
    -webkit-appearance: none;
}
.form-input::placeholder { color: var(--t3); }
.form-input:focus {
    border-color: var(--accent);
    background: var(--bg-card-h);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.09);
}

.form-textarea {
    resize: vertical;
    min-height: 128px;
}

/* Feedback message (JS populates + toggles class) */
.form-feedback {
    font-size: 0.88rem;
    text-align: center;
    padding: 10px 14px;
    border-radius: 8px;
    display: none;
}
.form-feedback.success {
    display: block;
    color: #4ade80;
    background: rgba(74, 222, 128, 0.08);
    border: 1px solid rgba(74, 222, 128, 0.18);
}
.form-feedback.error {
    display: block;
    color: #f87171;
    background: rgba(248, 113, 113, 0.08);
    border: 1px solid rgba(248, 113, 113, 0.18);
}


/* =====================================================
   11. FOOTER
===================================================== */
.footer {
    padding: 36px 0;
    border-top: 1px solid var(--border);
    background: var(--bg);
}
.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}
.footer-credit { font-size: 0.88rem; color: var(--t2); }
.footer-copy   { font-family: var(--mono); font-size: 0.78rem; color: var(--t3); }


/* =====================================================
   12. RESPONSIVE — TABLET  (≤ 1024px)
===================================================== */
@media (max-width: 1024px) {
    :root { --pad-section: 90px; }

    .about-grid   { grid-template-columns: 1fr; gap: 48px; }
    .skills-grid  { grid-template-columns: repeat(3, 1fr); }
    .projects-grid { grid-template-columns: 1fr 1fr; }
    .contact-grid { grid-template-columns: 1fr; gap: 48px; }
}


/* =====================================================
   13. RESPONSIVE — MOBILE  (≤ 768px)
===================================================== */
@media (max-width: 768px) {
    :root { --pad-section: 70px; }

    /* Show hamburger */
    .hamburger { display: flex; }

    /* Slide-down mobile menu */
    .nav-links {
        position: fixed;
        top: var(--nav-h);
        left: 0; right: 0;
        flex-direction: column;
        align-items: stretch;
        background: rgba(10, 10, 10, 0.98);
        backdrop-filter: blur(20px);
        padding: 16px 20px 28px;
        border-bottom: 1px solid var(--border);
        gap: 4px;
        transform: translateY(-115%);
        opacity: 0;
        pointer-events: none;
        transition: transform 0.38s var(--ease), opacity 0.38s;
    }
    .nav-links.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    .nav-link {
        padding: 12px 16px;
        font-size: 1rem;
        border-radius: 8px;
    }

    /* Hero adjustments */
    .hero-cta { flex-direction: column; align-items: center; }
    .btn      { width: 100%; max-width: 290px; justify-content: center; }

    /* Projects single column */
    .projects-grid { grid-template-columns: 1fr; }

    /* Skills 2-col on mobile */
    .skills-grid { grid-template-columns: 1fr 1fr; }

    /* Footer stacks */
    .footer-inner { flex-direction: column; text-align: center; }
}


/* =====================================================
   14. RESPONSIVE — SMALL MOBILE  (≤ 480px)
===================================================== */
@media (max-width: 480px) {
    .skills-grid  { grid-template-columns: 1fr; }
    .logo-name    { display: none; }   /* show badge only in tight space */
    .hero-badge   { font-size: 0.72rem; }
    .hero-name    { font-size: clamp(2.6rem, 18vw, 4rem); }
}