/* =========================================================
   PERSONAL PORTFOLIO - STYLE SHEET
   Beginner-friendly: edit variables in :root first.
   ========================================================= */

/* ---------- 1. Global variables ---------- */
:root {
    --bg: #07111f;
    --bg-soft: #0b1728;
    --card: rgba(15, 31, 52, 0.78);
    --card-solid: #0e1c2e;
    --text: #eaf2ff;
    --muted: #9eb0c8;
    --primary: #38bdf8;
    --primary-dark: #0ea5e9;
    --secondary: #8b5cf6;
    --border: rgba(148, 163, 184, 0.16);
    --white: #ffffff;
    --danger: #fb7185;
    --success: #4ade80;

    --max-width: 1120px;
    --radius: 20px;
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.25);

    --transition: 0.3s ease;
}

/* ---------- 2. Reset ---------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 85px;
}

body {
    font-family: "Inter", sans-serif;
    background:
        radial-gradient(circle at 10% 10%, rgba(56, 189, 248, 0.08), transparent 28%),
        radial-gradient(circle at 90% 20%, rgba(139, 92, 246, 0.09), transparent 30%),
        var(--bg);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
}

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

button,
input,
textarea {
    font: inherit;
}

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

ul {
    list-style: none;
}

.container {
    width: min(92%, var(--max-width));
    margin: 0 auto;
}

.section {
    padding: 105px 0;
    position: relative;
}

.section-alt {
    background: rgba(255, 255, 255, 0.018);
}

/* ---------- 3. Reusable typography ---------- */
.section-heading {
    max-width: 680px;
    margin: 0 auto 55px;
    text-align: center;
}

.eyebrow {
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.78rem;
    font-weight: 800;
    margin-bottom: 9px;
}

.section-heading h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    line-height: 1.15;
    margin-bottom: 14px;
}

.section-heading h2 span,
.logo span {
    color: var(--primary);
}

.section-heading > p:last-child {
    color: var(--muted);
}

/* ---------- 4. Header / Navbar ---------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(7, 17, 31, 0.88);
    backdrop-filter: blur(18px);
    border-color: var(--border);
    box-shadow: 0 10px 35px rgba(0, 0, 0, 0.18);
}

.navbar {
    min-height: 78px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
}

.logo {
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 7px;
}

.nav-link {
    color: var(--muted);
    padding: 9px 11px;
    font-size: 0.88rem;
    font-weight: 600;
    border-radius: 9px;
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
    background: rgba(56, 189, 248, 0.07);
}

.resume-link {
    border: 1px solid rgba(56, 189, 248, 0.35);
    color: var(--primary);
}

.menu-toggle {
    display: none;
    color: var(--text);
    background: transparent;
    border: 0;
    font-size: 1.3rem;
    cursor: pointer;
}

/* ---------- 5. Hero ---------- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 130px;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
    gap: 70px;
}

.hero-content h1 {
    font-size: clamp(3.2rem, 8vw, 6.2rem);
    line-height: 0.95;
    letter-spacing: -4px;
    margin-bottom: 18px;
}

.hero-content h2 {
    min-height: 45px;
    color: var(--primary);
    font-size: clamp(1.25rem, 2.5vw, 1.8rem);
    margin-bottom: 22px;
}

.cursor {
    animation: blink 0.8s infinite;
}

.hero-description {
    color: var(--muted);
    max-width: 650px;
    font-size: 1.02rem;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 13px;
    margin: 30px 0 25px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    padding: 12px 19px;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 700;
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    color: #03111e;
    background: linear-gradient(135deg, var(--primary), #67e8f9);
    box-shadow: 0 12px 30px rgba(56, 189, 248, 0.15);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 18px 40px rgba(56, 189, 248, 0.25);
}

.btn-outline {
    border-color: rgba(148, 163, 184, 0.3);
    color: var(--text);
    background: rgba(255, 255, 255, 0.025);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-3px);
}

.social-links,
.footer-socials {
    display: flex;
    gap: 10px;
}

.social-links a,
.footer-socials a {
    width: 40px;
    height: 40px;
    display: grid;
    place-items: center;
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--muted);
    transition: var(--transition);
}

.social-links a:hover,
.footer-socials a:hover {
    color: var(--primary);
    border-color: rgba(56, 189, 248, 0.5);
    transform: translateY(-4px);
}

.hero-image-wrap {
    display: flex;
    justify-content: center;
}

.profile-frame {
    position: relative;
    width: min(390px, 82vw);
    aspect-ratio: 1 / 1;
}

.profile-frame::before {
    content: "";
    position: absolute;
    inset: -18px;
    border: 1px solid rgba(56, 189, 248, 0.22);
    border-radius: 35% 65% 60% 40% / 45% 40% 60% 55%;
    animation: float 7s ease-in-out infinite;
}

.profile-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 32% 68% 62% 38% / 46% 43% 57% 54%;
    border: 5px solid rgba(255, 255, 255, 0.06);
    box-shadow: var(--shadow);
    background: #10243a;
}

.floating-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 11px 14px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: rgba(11, 23, 40, 0.85);
    backdrop-filter: blur(14px);
    box-shadow: var(--shadow);
    font-size: 0.76rem;
    font-weight: 700;
}

.floating-card i {
    color: var(--primary);
}

.floating-card-one {
    left: -35px;
    bottom: 18%;
}

.floating-card-two {
    right: -35px;
    top: 18%;
}

/* ---------- 6. About ---------- */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 45px;
}

.about-text h3,
.hobbies h3,
.contact-info h3 {
    font-size: 1.45rem;
    margin-bottom: 17px;
}

.about-text p,
.contact-info > p {
    color: var(--muted);
    margin-bottom: 15px;
}

.about-highlights {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 25px;
}

.about-highlights div {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 9px 12px;
    border-radius: 9px;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.02);
    font-size: 0.8rem;
}

.about-highlights i {
    color: var(--primary);
}

.hobby-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 11px;
}

.hobby-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 13px;
    color: var(--muted);
    transition: var(--transition);
}

.hobby-card:hover {
    color: var(--text);
    border-color: rgba(56, 189, 248, 0.35);
    transform: translateY(-3px);
}

.hobby-card i {
    color: var(--primary);
}

/* ---------- 7. Skills ---------- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}

.skill-category {
    padding: 27px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: var(--transition);
}

.skill-category:hover {
    transform: translateY(-5px);
    border-color: rgba(56, 189, 248, 0.28);
    box-shadow: var(--shadow);
}

.category-icon {
    width: 46px;
    height: 46px;
    display: grid;
    place-items: center;
    border-radius: 12px;
    color: var(--primary);
    background: rgba(56, 189, 248, 0.09);
    margin-bottom: 18px;
}

.skill-category h3 {
    margin-bottom: 15px;
}

.skill-tags,
.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
}

.skill-tags span,
.tech-tags span {
    padding: 5px 9px;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.025);
    color: var(--muted);
    border-radius: 7px;
    font-size: 0.73rem;
}

/* ---------- 8. Experience timeline ---------- */
.timeline {
    max-width: 850px;
    margin: auto;
    position: relative;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 10px;
    top: 5px;
    bottom: 5px;
    width: 1px;
    background: rgba(56, 189, 248, 0.2);
}

.timeline-item {
    position: relative;
    padding-left: 45px;
    margin-bottom: 30px;
}

.timeline-dot {
    position: absolute;
    left: 4px;
    top: 8px;
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 0 5px rgba(56, 189, 248, 0.08);
}

.timeline-content,
.education-card {
    padding: 27px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: var(--transition);
}

.timeline-content:hover,
.education-card:hover {
    border-color: rgba(56, 189, 248, 0.28);
    transform: translateX(5px);
}

.timeline-date {
    color: var(--primary);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 1px;
}

.timeline-content h3 {
    margin: 5px 0 2px;
}

.timeline-content h4,
.education-main h4 {
    color: var(--muted);
    font-weight: 500;
    margin-bottom: 10px;
}

.timeline-content p {
    color: var(--muted);
    margin-bottom: 14px;
}

/* ---------- 9. Education ---------- */
.education-card {
    display: grid;
    grid-template-columns: 70px 1fr;
    gap: 20px;
}

.education-icon {
    width: 58px;
    height: 58px;
    display: grid;
    place-items: center;
    border-radius: 15px;
    background: rgba(56, 189, 248, 0.09);
    color: var(--primary);
    font-size: 1.4rem;
}

.education-main p {
    color: var(--muted);
    margin: 10px 0 22px;
}

.education-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.education-columns h5 {
    margin-bottom: 8px;
}

.education-columns li {
    color: var(--muted);
    font-size: 0.88rem;
    margin-bottom: 5px;
}

.education-columns li::before {
    content: "▹";
    color: var(--primary);
    margin-right: 8px;
}

/* ---------- 10. Projects ---------- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.project-card {
    overflow: hidden;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-7px);
    border-color: rgba(56, 189, 248, 0.3);
    box-shadow: var(--shadow);
}

.project-image {
    height: 190px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.project-image::after {
    content: "";
    position: absolute;
    width: 220px;
    height: 220px;
    border: 1px solid rgba(255,255,255,0.13);
    border-radius: 50%;
}

.project-image i {
    position: relative;
    z-index: 2;
    font-size: 3rem;
    color: rgba(255, 255, 255, 0.88);
}

.project-image span {
    position: absolute;
    right: 18px;
    top: 15px;
    font-size: 0.75rem;
    font-weight: 800;
    opacity: 0.7;
}

.project-gradient-one { background: linear-gradient(135deg, #0f766e, #155e75); }
.project-gradient-two { background: linear-gradient(135deg, #6d28d9, #1d4ed8); }
.project-gradient-three { background: linear-gradient(135deg, #166534, #0f766e); }
.project-gradient-four { background: linear-gradient(135deg, #9f1239, #6d28d9); }

.project-body {
    padding: 25px;
}

.project-label {
    color: var(--primary);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 800;
}

.project-body h3 {
    font-size: 1.35rem;
    margin: 4px 0 8px;
}

.project-body p {
    color: var(--muted);
    font-size: 0.88rem;
    margin-bottom: 16px;
}

.project-links {
    display: flex;
    gap: 16px;
    margin-top: 20px;
}

.project-links a {
    color: var(--text);
    font-size: 0.8rem;
    font-weight: 700;
}

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

/* ---------- 11. Resume ---------- */
.resume-section {
    padding-top: 75px;
}

.resume-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 35px;
    padding: 45px;
    background:
        linear-gradient(135deg, rgba(56, 189, 248, 0.10), rgba(139, 92, 246, 0.10)),
        var(--card);
    border: 1px solid var(--border);
    border-radius: 25px;
}

.resume-card h2 {
    font-size: clamp(1.7rem, 4vw, 2.5rem);
    margin-bottom: 8px;
}

.resume-card p:not(.eyebrow) {
    color: var(--muted);
    max-width: 600px;
}

.resume-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

/* ---------- 12. Contact ---------- */
.contact-grid {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 55px;
    align-items: start;
}

.contact-details {
    margin-top: 28px;
    display: grid;
    gap: 13px;
}

.contact-details > *,
.contact-details a {
    display: flex;
    align-items: center;
    gap: 13px;
    color: var(--text);
}

.contact-icon {
    flex: 0 0 42px;
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--primary);
    background: rgba(255,255,255,0.02);
}

.contact-details small {
    display: block;
    color: var(--muted);
    font-size: 0.68rem;
}

.contact-details a:hover {
    color: var(--primary);
}

.contact-form {
    padding: 28px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.form-group {
    margin-bottom: 17px;
}

.form-group label {
    display: block;
    margin-bottom: 7px;
    font-size: 0.78rem;
    font-weight: 700;
}

.form-group input,
.form-group textarea {
    width: 100%;
    color: var(--text);
    background: rgba(255,255,255,0.025);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 13px;
    outline: none;
    resize: vertical;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: rgba(56, 189, 248, 0.6);
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.07);
}

.form-group input.invalid,
.form-group textarea.invalid {
    border-color: var(--danger);
}

.error-message {
    color: var(--danger);
    display: block;
    min-height: 17px;
    margin-top: 3px;
    font-size: 0.68rem;
}

.form-status {
    margin-top: 12px;
    font-size: 0.8rem;
}

/* ---------- 13. Footer ---------- */
.footer {
    border-top: 1px solid var(--border);
    padding: 35px 0 22px;
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 25px;
}

.footer-content p {
    color: var(--muted);
    font-size: 0.8rem;
    margin-top: 2px;
}

.copyright {
    margin-top: 30px;
    padding-top: 18px;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--muted);
    font-size: 0.72rem;
}

/* ---------- 14. Back-to-top ---------- */
.back-to-top {
    position: fixed;
    right: 22px;
    bottom: 22px;
    width: 43px;
    height: 43px;
    border: 1px solid var(--border);
    border-radius: 11px;
    color: var(--primary);
    background: rgba(11, 23, 40, 0.9);
    backdrop-filter: blur(10px);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(15px);
    transition: var(--transition);
    z-index: 900;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* ---------- 15. Scroll reveal animation ---------- */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- 16. Keyframes ---------- */
@keyframes blink {
    50% { opacity: 0; }
}

@keyframes float {
    0%, 100% { transform: rotate(0deg) translateY(0); }
    50% { transform: rotate(4deg) translateY(-8px); }
}

/* ---------- 17. Responsive design ---------- */
@media (max-width: 1000px) {
    .nav-menu {
        gap: 1px;
    }

    .nav-link {
        padding: 8px 7px;
        font-size: 0.78rem;
    }

    .hero-grid {
        gap: 35px;
    }

    .floating-card-one {
        left: -10px;
    }

    .floating-card-two {
        right: -10px;
    }
}

@media (max-width: 820px) {
    .section {
        padding: 80px 0;
    }

    .menu-toggle {
        display: block;
    }

    .nav-menu {
        position: absolute;
        top: 78px;
        left: 4%;
        width: 92%;
        display: none;
        flex-direction: column;
        align-items: stretch;
        padding: 12px;
        background: rgba(11, 23, 40, 0.97);
        backdrop-filter: blur(18px);
        border: 1px solid var(--border);
        border-radius: 15px;
        box-shadow: var(--shadow);
    }

    .nav-menu.open {
        display: flex;
    }

    .nav-link {
        display: block;
        padding: 12px;
    }

    .hero {
        min-height: auto;
        padding-top: 145px;
    }

    .hero-grid,
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .hero-content {
        text-align: center;
    }

    .hero-description {
        margin: auto;
    }

    .hero-buttons,
    .social-links {
        justify-content: center;
    }

    .hero-image-wrap {
        order: -1;
    }

    .profile-frame {
        width: min(330px, 75vw);
    }

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

    .resume-card {
        align-items: flex-start;
        flex-direction: column;
    }
}

@media (max-width: 560px) {
    .hero-content h1 {
        font-size: 3.3rem;
        letter-spacing: -2.5px;
    }

    .section-heading {
        margin-bottom: 40px;
    }

    .hobby-grid,
    .education-columns,
    .form-row {
        grid-template-columns: 1fr;
    }

    .education-card {
        grid-template-columns: 1fr;
    }

    .education-icon {
        width: 50px;
        height: 50px;
    }

    .resume-card {
        padding: 28px;
    }

    .resume-actions,
    .resume-actions .btn {
        width: 100%;
    }

    .project-image {
        height: 165px;
    }

    .contact-form {
        padding: 21px;
    }

    .floating-card {
        display: none;
    }

    .footer-content {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}