/* ============================================
   Chijindu Ezekiel Obioma — Portfolio Styles
   Bold & Techy / Dark Mode
   ============================================ */

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

:root {
    --bg-deep: #0A0E17;
    --bg-surface: #131A2B;
    --primary: #00E5FF;
    --secondary: #39FF14;
    --text: #E8ECF1;
    --text-muted: #64748B;
    --border: #1E293B;
    --amber: #FFAB00;
    --red: #FF3B5C;
    --glow-primary: rgba(0, 229, 255, 0.15);
    --glow-secondary: rgba(57, 255, 20, 0.1);
    --font-heading: 'JetBrains Mono', monospace;
    --font-body: 'Inter', sans-serif;
    --font-code: 'Fira Code', monospace;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

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

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s;
}

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

strong {
    color: var(--primary);
    font-weight: 600;
}

::selection {
    background: var(--primary);
    color: var(--bg-deep);
}

/* --- Layout --- */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
    position: relative;
}

.section__title {
    font-family: var(--font-heading);
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 48px;
    color: var(--text);
}

.section__arrow {
    color: var(--primary);
    margin-right: 8px;
}

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 14, 23, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    transition: background 0.3s;
}

.nav__container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav__logo {
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
}

.logo-bracket {
    color: var(--primary);
}

.nav__links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav__links a {
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}

.nav__links a:hover {
    color: var(--text);
}

.nav__cta {
    background: var(--primary) !important;
    color: var(--bg-deep) !important;
    padding: 8px 20px;
    border-radius: 6px;
    font-weight: 600 !important;
}

.nav__cta:hover {
    background: var(--secondary) !important;
    color: var(--bg-deep) !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(--text);
    transition: all 0.3s;
}

/* --- Hero --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 72px;
    overflow: hidden;
}

.hero__grid-bg {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--border) 1px, transparent 1px),
        linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.3;
}

.hero__glow {
    position: absolute;
    top: 20%;
    right: 10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--glow-primary) 0%, transparent 70%);
    pointer-events: none;
}

.hero__container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
    width: 100%;
}

.hero__terminal {
    margin-bottom: 32px;
    max-width: 520px;
}

.terminal__header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--bg-surface);
    border-radius: 8px 8px 0 0;
    border: 1px solid var(--border);
    border-bottom: none;
}

.terminal__dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.terminal__dot--red { background: #FF5F57; }
.terminal__dot--yellow { background: #FEBC2E; }
.terminal__dot--green { background: #28C840; }

.terminal__title {
    color: var(--text-muted);
    font-family: var(--font-code);
    font-size: 12px;
    margin-left: 8px;
}

.terminal__body {
    padding: 16px 20px;
    background: rgba(19, 26, 43, 0.8);
    border: 1px solid var(--border);
    border-radius: 0 0 8px 8px;
    font-family: var(--font-code);
    font-size: 14px;
    color: var(--secondary);
    overflow-x: auto;
}

.terminal__body pre {
    margin: 0;
}

.terminal__body code {
    font-family: var(--font-code);
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.7;
}

.terminal__line {
    display: flex;
    align-items: center;
    gap: 8px;
}

.terminal__prompt {
    color: var(--primary);
    font-weight: 500;
}

.terminal__text {
    color: var(--secondary);
}

.terminal__cursor {
    color: var(--primary);
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.hero__greeting {
    font-family: var(--font-code);
    font-size: 16px;
    color: var(--primary);
    margin-bottom: 8px;
}

.hero__name {
    font-family: var(--font-heading);
    font-size: 56px;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--text);
    margin-bottom: 12px;
}

.hero__title {
    font-family: var(--font-body);
    font-size: 24px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 16px;
}

.hero__tagline {
    font-size: 18px;
    color: var(--text-muted);
    margin-bottom: 32px;
    max-width: 500px;
}

.hero__actions {
    display: flex;
    gap: 16px;
    margin-bottom: 60px;
}

.hero__stats {
    display: flex;
    gap: 48px;
}

.stat {
    text-align: left;
}

.stat__number {
    font-family: var(--font-heading);
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
}

.stat__suffix {
    font-family: var(--font-heading);
    font-size: 20px;
    color: var(--primary);
}

.stat__label {
    display: block;
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    font-family: var(--font-body);
}

.btn--primary {
    background: var(--primary);
    color: var(--bg-deep);
}

.btn--primary:hover {
    background: var(--secondary);
    color: var(--bg-deep);
    box-shadow: 0 0 24px var(--glow-secondary);
}

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

.btn--outline:hover {
    background: var(--glow-primary);
    color: var(--text);
}

.btn--full {
    width: 100%;
    justify-content: center;
}

/* --- About --- */
.about__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.about__text p {
    margin-bottom: 16px;
    color: var(--text-muted);
    font-size: 16px;
    line-height: 1.7;
}

.about__text .btn {
    margin-top: 16px;
}

.about__terminal {
    position: sticky;
    top: 100px;
}

/* --- Skills --- */
.skills__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.skill-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px 24px;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.skill-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    opacity: 0;
    transition: opacity 0.3s;
}

.skill-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(0, 229, 255, 0.1);
}

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

.skill-card__icon {
    margin-bottom: 16px;
}

.skill-card h3 {
    font-family: var(--font-body);
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 16px;
}

.skill-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    font-family: var(--font-code);
    font-size: 12px;
    color: var(--primary);
    background: rgba(0, 229, 255, 0.08);
    padding: 4px 10px;
    border-radius: 4px;
    border: 1px solid rgba(0, 229, 255, 0.15);
}

/* --- Projects --- */
.projects__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.project-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 28px;
    transition: all 0.3s;
}

.project-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(0, 229, 255, 0.08);
}

.project-card__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.project-card__links {
    display: flex;
    gap: 12px;
}

.project-card__link {
    color: var(--text-muted);
    transition: color 0.2s;
}

.project-card__link:hover {
    color: var(--primary);
}

.project-card__title {
    font-family: var(--font-body);
    font-size: 18px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 12px;
}

.project-card__description {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 20px;
}

.project-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

/* --- Experience Timeline --- */
.timeline {
    position: relative;
    padding-left: 32px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border);
}

.timeline__item {
    position: relative;
    padding-bottom: 40px;
}

.timeline__marker {
    position: absolute;
    left: -37px;
    top: 4px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--primary);
    border: 2px solid var(--bg-deep);
    box-shadow: 0 0 12px var(--glow-primary);
}

.timeline__content {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
}

.timeline__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 4px;
}

.timeline__header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text);
}

.timeline__period {
    font-family: var(--font-code);
    font-size: 13px;
    color: var(--primary);
}

.timeline__company {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.timeline__details {
    list-style: none;
}

.timeline__details li {
    position: relative;
    padding-left: 20px;
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.8;
}

.timeline__details li::before {
    content: '>';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-family: var(--font-code);
}

.experience__note {
    margin-top: 24px;
    font-size: 13px;
    color: var(--amber);
    font-style: italic;
}

/* --- Contact --- */
.contact__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
}

.contact__intro {
    font-size: 18px;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 32px;
}

.contact__links {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact__link {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-muted);
    font-size: 15px;
    transition: color 0.2s;
}

.contact__link:hover {
    color: var(--primary);
}

.contact__form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form__group input,
.form__group textarea {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-family: var(--font-body);
    font-size: 15px;
    transition: border-color 0.2s;
    outline: none;
}

.form__group input::placeholder,
.form__group textarea::placeholder {
    color: var(--text-muted);
}

.form__group input:focus,
.form__group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--glow-primary);
}

.form__group textarea {
    resize: vertical;
    min-height: 120px;
}

/* --- Footer --- */
.footer {
    padding: 48px 0;
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer__content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.footer__logo {
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
}

.footer__copy {
    font-size: 14px;
    color: var(--text-muted);
}

.footer__tagline {
    font-size: 12px;
    color: var(--text-muted);
    font-family: var(--font-code);
}

/* --- Animations --- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-in {
    animation: fadeInUp 0.6s ease forwards;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .nav__links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(10, 14, 23, 0.95);
        backdrop-filter: blur(12px);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border);
    }

    .nav__links.active {
        display: flex;
    }

    .nav__toggle {
        display: flex;
    }

    .hero__name {
        font-size: 36px;
    }

    .hero__stats {
        flex-direction: column;
        gap: 24px;
    }

    .about__grid,
    .contact__grid {
        grid-template-columns: 1fr;
    }

    .skills__grid {
        grid-template-columns: 1fr 1fr;
    }

    .projects__grid {
        grid-template-columns: 1fr;
    }

    .section {
        padding: 64px 0;
    }

    .section__title {
        font-size: 24px;
    }
}

@media (max-width: 480px) {
    .skills__grid {
        grid-template-columns: 1fr;
    }

    .hero__name {
        font-size: 28px;
    }

    .hero__actions {
        flex-direction: column;
    }

    .timeline__header {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }
}