:root {
    --black: #ffffff;
    --graphite: #F5F5F5;
    --gold: #C9A34E;
    --gold-light: #E5C97A;
    --white: #1A1A1A;
    --grey: #666666;

    --bg: var(--black);
    --surface: var(--graphite);
    --surface-hover: #E8E8E8;
    --text: var(--white);
    --text-secondary: var(--grey);
    --accent: var(--gold);
    --accent-glow: rgba(201, 163, 78, 0.15);
    --border: rgba(0, 0, 0, 0.08);
    --card-bg: rgba(245, 245, 245, 0.8);
    --nav-bg: rgba(255, 255, 255, 0.95);
    --hero-gradient: linear-gradient(135deg, #ffffff 0%, #f5f5f5 100%);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Poppins', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.3s;
}
a:hover {
    color: var(--gold-light);
}


.preloader {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s, visibility 0.5s;
}
.preloader.hidden {
    opacity: 0;
    visibility: hidden;
}
.preloader-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}


.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(to right, var(--accent), var(--gold-light));
    z-index: 1100;
    width: 0%;
    transition: width 0.1s linear;
}


#particles-js {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.4;
}


.skip-nav {
    position: absolute;
    top: -100%;
    left: 1rem;
    background: var(--accent);
    color: var(--black);
    padding: 0.5rem 1rem;
    border-radius: 0 0 8px 8px;
    z-index: 2000;
    font-weight: 600;
    transition: top 0.3s;
}
.skip-nav:focus {
    top: 0;
}


/* ====== Mobile Overlay ====== */
.nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(4px);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.35s ease, visibility 0.35s ease;
}
.nav-overlay.active {
    opacity: 1;
    visibility: visible;
}

nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    background: rgba(255, 255, 255, 0.85);
    border-bottom: 1px solid var(--border);
    padding: 1rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: padding 0.35s ease, background 0.35s ease, box-shadow 0.35s ease;
}
nav.scrolled {
    padding: 0.55rem 5%;
    background: rgba(255, 255, 255, 0.97);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
}
.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    font-weight: 800;
    font-size: 1.2rem;
    color: var(--text);
    letter-spacing: -0.5px;
}
.nav-logo-img {
    width: 100px;
    height: 46px;
    object-fit: contain;
    filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.35));
    transition: transform 0.35s ease;
}
nav.scrolled .nav-logo-img {
    transform: scale(0.9);
}
.nav-logo-text {
    white-space: nowrap;
}
.nav-links {
    list-style: none;
    display: flex;
    gap: 0.5rem;
    align-items: center;
}
.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    text-decoration: none;
    padding: 0.45rem 1rem;
    border-radius: 10px;
    position: relative;
    transition: color 0.3s, background 0.3s;
}
.nav-links a:hover {
    color: var(--text);
    background: rgba(201, 163, 78, 0.08);
}
.nav-links a.active {
    color: var(--accent);
    background: rgba(201, 163, 78, 0.12);
    font-weight: 600;
}

/* Nav CTA Button */
.nav-links a.nav-cta {
    background: linear-gradient(135deg, var(--accent), var(--gold-light));
    color: #fff;
    font-weight: 600;
    padding: 0.5rem 1.3rem;
    border-radius: 50px;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    margin-left: 0.5rem;
    box-shadow: 0 2px 12px var(--accent-glow);
    transition: transform 0.3s, box-shadow 0.3s, background 0.3s;
}
.nav-links a.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px var(--accent-glow);
    background: linear-gradient(135deg, var(--gold-light), var(--accent));
    color: #fff;
}
.nav-links a.nav-cta.active {
    background: linear-gradient(135deg, var(--accent), var(--gold-light));
    color: #fff;
}
.nav-links a.nav-cta i {
    font-size: 0.8rem;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 6px;
    z-index: 1001;
    padding: 4px;
    border-radius: 6px;
    transition: background 0.2s;
}
.hamburger:hover {
    background: rgba(201, 163, 78, 0.08);
}
.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform 0.35s ease, opacity 0.25s ease, background 0.3s;
    transform-origin: center;
}
.hamburger.open span {
    background: var(--accent);
}
.hamburger.open span:nth-child(1) {
    transform: rotate(45deg) translate(5.5px, 5.5px);
}
.hamburger.open span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}
.hamburger.open span:nth-child(3) {
    transform: rotate(-45deg) translate(5.5px, -5.5px);
}


.hero {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 3rem;
    padding: 6rem 5% 5rem;
    text-align: center;
    position: relative;
    min-height: 70vh;
}
.hero-img {
    width: 220px;
    height: 220px;
    object-fit: cover;
    border-radius: 50%;
    border: 5px solid var(--accent);
    box-shadow: 0 0 30px var(--accent-glow), 0 0 60px rgba(201,163,78,0.1);
    animation: float 6s ease-in-out infinite;
}
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}
.hero-text h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, var(--accent), var(--gold-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero-text .subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    min-height: 1.8em;
}
.hero-text .subtitle .cursor {
    display: inline-block;
    width: 2px;
    height: 1.1em;
    background: var(--accent);
    margin-left: 2px;
    vertical-align: text-bottom;
    animation: blink 1s step-end infinite;
}
@keyframes blink {
    50% { opacity: 0; }
}

/* Hero CTA Buttons */
.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
    flex-wrap: wrap;
}
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.8rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
    font-family: inherit;
}
.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--gold-light));
    color: var(--black);
    box-shadow: 0 4px 15px var(--accent-glow);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px var(--accent-glow);
    color: var(--black);
}
.btn-outline {
    background: transparent;
    color: var(--accent);
    border: 2px solid var(--accent);
}
.btn-outline:hover {
    background: var(--accent);
    color: var(--black);
    transform: translateY(-2px);
}

/* Hero Social Icons */
.hero-socials {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 1.5rem;
}
.hero-socials a {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
    transition: all 0.3s;
    background: var(--card-bg);
    backdrop-filter: blur(8px);
}
.hero-socials a:hover {
    background: var(--accent);
    color: var(--black);
    border-color: var(--accent);
    transform: translateY(-3px);
    box-shadow: 0 4px 15px var(--accent-glow);
}


section {
    padding: 5rem 5%;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
}
.section-header {
    text-align: center;
    margin-bottom: 3rem;
}
.section-header h2 {
    font-size: 2.2rem;
    display: inline-block;
    position: relative;
    margin-bottom: 0.5rem;
}
.section-header h2::after {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: -8px;
    width: 50px;
    height: 4px;
    background: var(--accent);
    border-radius: 4px;
}
.section-header p {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-top: 1rem;
}


.about-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}
.about-text {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: var(--shadow);
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}
.about-text.revealed {
    opacity: 1;
    transform: translateY(0);
}
.about-text p {
    margin-bottom: 1rem;
    line-height: 1.8;
}
.about-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}
.highlight-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: rgba(201,163,78,0.08);
    border-radius: 12px;
    border: 1px solid rgba(201,163,78,0.15);
}
.highlight-item i {
    color: var(--accent);
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}
.highlight-item span {
    font-size: 0.95rem;
}


.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}
.stat-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.5rem;
    text-align: center;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}
.stat-card.revealed {
    opacity: 1;
    transform: translateY(0);
}
.stat-card:hover {
    border-color: rgba(201,163,78,0.3);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(201,163,78,0.1);
}
.stat-number {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(to right, var(--accent), var(--gold-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.stat-label {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 0.25rem;
}


.timeline {
    position: relative;
    padding-left: 2.5rem;
}
.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent), transparent);
}
.timeline-item {
    position: relative;
    margin-bottom: 2rem;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}
.timeline-item.revealed {
    opacity: 1;
    transform: translateY(0);
}
.timeline-item::before {
    content: '';
    position: absolute;
    left: -2.5rem;
    top: 1.5rem;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent);
    border: 3px solid var(--bg);
    box-shadow: 0 0 10px var(--accent-glow);
    transform: translateX(-5px);
}

/* Glassmorphism cards */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}
.card:hover {
    background: var(--surface-hover);
    transform: translateY(-3px);
    border-color: rgba(201,163,78,0.2);
}

.card-header {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    margin-bottom: 0.75rem;
    align-items: baseline;
}
.card-title {
    font-weight: 600;
    font-size: 1.2rem;
}
.card-date {
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 500;
    background: rgba(201,163,78,0.1);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    border: 1px solid rgba(201,163,78,0.2);
}
.card-subtitle {
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.card-subtitle i {
    color: var(--accent);
    font-size: 0.9rem;
}

ul {
    padding-left: 1.2rem;
}
li {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

/* ====== Skills Section ====== */
.skills-category {
    margin-bottom: 1.5rem;
}
.skills-category-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1.2rem;
    color: var(--text);
}
.skills-category-title i {
    color: var(--accent);
    font-size: 1.2rem;
}
.skills-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}
.skill-tag {
    background: rgba(201,163,78,0.12);
    color: var(--gold-light);
    font-weight: 500;
    padding: 0.5rem 1.2rem;
    border-radius: 30px;
    font-size: 0.9rem;
    transition: all 0.3s;
    border: 1px solid rgba(201,163,78,0.2);
    cursor: default;
}
.skill-tag:hover {
    background: var(--accent);
    color: var(--black);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px var(--accent-glow);
}

/* Languages with progress */
.languages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}
.lang-card {
    background: var(--card-bg);
    backdrop-filter: blur(8px);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.25rem;
    transition: all 0.3s;
}
.lang-card:hover {
    border-color: rgba(201,163,78,0.3);
}
.lang-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.75rem;
    font-weight: 500;
}
.lang-level {
    color: var(--accent);
    font-size: 0.85rem;
}
.lang-bar {
    height: 6px;
    background: rgba(255,255,255,0.08);
    border-radius: 3px;
    overflow: hidden;
}
.lang-bar-fill {
    height: 100%;
    background: linear-gradient(to right, var(--accent), var(--gold-light));
    border-radius: 3px;
    width: 0;
    transition: width 1.2s ease;
}

/* Training cards */
.training-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}
.training-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    opacity: 0;
    transform: translateY(30px);
}
.training-card.revealed {
    opacity: 1;
    transform: translateY(0);
}
.training-card:hover {
    background: var(--surface-hover);
    transform: translateY(-3px);
    border-color: rgba(201,163,78,0.2);
}
.training-card .card-header {
    margin-bottom: 0.5rem;
}

/* ====== Education Timeline ====== */
.edu-item {
    position: relative;
    margin-bottom: 2rem;
    background: var(--card-bg);
    backdrop-filter: blur(8px);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 1.5rem 2rem;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}
.edu-item.revealed {
    opacity: 1;
    transform: translateY(0);
}
.edu-item:hover {
    border-color: rgba(201,163,78,0.2);
    transform: translateY(-3px);
}
.edu-title {
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}
.edu-meta {
    color: var(--text-secondary);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}
.edu-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8rem;
    color: var(--accent);
    background: rgba(201,163,78,0.1);
    padding: 0.2rem 0.7rem;
    border-radius: 20px;
    border: 1px solid rgba(201,163,78,0.2);
    margin-top: 0.5rem;
}

/* ====== Contact ====== */

#contact {
    scroll-margin-top: 90px;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
}
.contact-card {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    background: var(--card-bg);
    backdrop-filter: blur(8px);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.25rem 1.5rem;
    transition: all 0.3s;
    opacity: 0;
    transform: translateY(20px);
}
.contact-card.revealed {
    opacity: 1;
    transform: translateY(0);
}
.contact-card:hover {
    border-color: rgba(201,163,78,0.3);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.3);
}
.contact-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(201,163,78,0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    font-size: 1.2rem;
    flex-shrink: 0;
}
.contact-info {
    display: flex;
    flex-direction: column;
}
.contact-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.contact-value {
    font-weight: 500;
    font-size: 0.95rem;
}

/* ====== Footer ====== */
footer {
    text-align: center;
    padding: 2.5rem 5%;
    color: var(--text-secondary);
    border-top: 1px solid var(--border);
    margin-top: 2rem;
}
.footer-socials {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 1rem;
}
.footer-socials a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.3s;
}
.footer-socials a:hover {
    background: var(--accent);
    color: var(--black);
    border-color: var(--accent);
}
footer p {
    font-size: 0.9rem;
}

/* ====== Back to Top ====== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: var(--accent);
    color: var(--black);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s;
    border: none;
    box-shadow: 0 4px 15px var(--accent-glow);
    z-index: 999;
}
.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px var(--accent-glow);
}

/* ====== Animations ====== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.revealed {
    opacity: 1;
    transform: translateY(0);
}

.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }

/* ====== Responsive ====== */
@media (max-width: 768px) {
    section {
        padding: 3rem 5%;
    }
    .section-header {
        margin-bottom: 2rem;
    }
    .contact-value {
        word-break: break-word;
    }
    .nav-links {
        position: fixed;
        top: 0;
        right: 0;
        width: min(82vw, 280px);
        height: 100dvh;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(24px);
        -webkit-backdrop-filter: blur(24px);
        display: none;
        flex-direction: column;
        padding: 5rem 2rem 2rem;
        gap: 0.25rem;
        z-index: 1001;
        box-shadow: -8px 0 40px rgba(0, 0, 0, 0.1);
        transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        transform: translateX(100%);
        overflow-y: auto;
        overscroll-behavior: contain;
    }
    .nav-links.active {
        display: flex;
        transform: translateX(0);
    }
    .nav-links a {
        font-size: 1.05rem;
        padding: 0.85rem 1.25rem;
        border-radius: 12px;
        width: 100%;
    }
    .nav-links a:hover {
        background: rgba(201, 163, 78, 0.1);
    }
    .nav-links a.active {
        background: rgba(201, 163, 78, 0.14);
    }
    .nav-links a.nav-cta {
        margin-left: 0;
        margin-top: 1rem;
        justify-content: center;
        padding: 0.85rem 1.25rem;
        border-radius: 14px;
        width: 100%;
    }
    .hamburger {
        display: flex;
    }
    .hero {
        flex-direction: column;
        padding-top: 3rem;
        min-height: auto;
    }
    .nav-logo-text {
        display: none;
    }
    .hero-text h1 {
        font-size: 2.2rem;
    }
    .hero-img {
        width: 160px;
        height: 160px;
    }
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .timeline {
        padding-left: 2rem;
    }
    .contact-grid {
        grid-template-columns: 1fr;
    }
    .training-grid {
        grid-template-columns: 1fr;
    }
    .section-header h2 {
        font-size: 1.8rem;
    }
}

@media (max-width: 480px) {
    section {
        padding: 2.5rem 1rem;
    }
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
    }
    .stat-card {
        padding: 1rem;
    }
    .hero-text h1 {
        font-size: 1.8rem;
    }
}