/* RESET & VARIABLES */
:root {
    --bg-dark: #070B19; /* Midnight Blue */
    --bg-alt: #0D1326; /* Slightly lighter deep blue */
    --accent: #D4AF37; /* Metallic Gold */
    --accent-hover: #F3E5AB;
    --text-light: #F8F9FA;
    --text-muted: #A0AABF;
    --card-bg: rgba(20, 26, 45, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
    
    --font-sans: 'Inter', sans-serif;
    --font-serif: 'Playfair Display', serif;
    
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 6rem 0;
}

.bg-alt {
    background-color: var(--bg-alt);
}

/* TYPOGRAPHY */
h1, h2, h3, h4 {
    font-family: var(--font-serif);
    line-height: 1.2;
    margin-bottom: 1rem;
}

.text-accent {
    color: var(--accent);
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 3px;
    background-color: var(--accent);
}

.section-title.center {
    display: block;
    text-align: center;
}

.section-title.center::after {
    left: 50%;
    transform: translateX(-50%);
}

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

/* BUTTONS */
.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    font-weight: 500;
    border-radius: 4px;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-sans);
    font-size: 0.95rem;
}

.btn-primary {
    background-color: var(--accent);
    color: var(--bg-dark);
    border: 1px solid var(--accent);
}

.btn-primary:hover {
    background-color: transparent;
    color: var(--accent);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-light);
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(5px);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.2);
    border-color: var(--accent);
}

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

.btn-outline:hover {
    background-color: var(--accent);
    color: var(--bg-dark);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* NAVIGATION */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(7, 11, 25, 0.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
}

.navbar.scrolled {
    padding: 0.5rem 0;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.5);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
    transition: var(--transition);
}

.logo {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-light);
    letter-spacing: 1px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
}

.nav-links a:hover {
    color: var(--accent);
}

.nav-btn {
    padding: 0.5rem 1.2rem;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
}

/* LANGUAGE TOGGLE */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.lang-toggle {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.55rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    cursor: pointer;
    transition: var(--transition);
}

.lang-toggle:hover {
    border-color: var(--accent);
    background: rgba(212, 175, 55, 0.08);
}

.lang-flag {
    display: inline-flex;
    width: 26px;
    height: 18px;
    border-radius: 3px;
    overflow: hidden;
    cursor: pointer;
    opacity: 0.45;
    filter: grayscale(45%);
    transition: var(--transition);
    outline: none;
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.lang-flag svg {
    width: 100%;
    height: 100%;
    display: block;
}

.lang-flag:hover {
    opacity: 0.85;
    filter: grayscale(0);
    transform: translateY(-1px);
}

.lang-flag.active {
    opacity: 1;
    filter: grayscale(0);
    box-shadow: 0 0 0 2px var(--accent);
}

.lang-flag:focus-visible {
    box-shadow: 0 0 0 2px var(--accent-hover);
}

.lang-divider {
    width: 1px;
    height: 16px;
    background: var(--border-color);
}

/* Tooltip */
.lang-tooltip {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    background: var(--bg-alt);
    color: var(--text-light);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.55rem 0.85rem;
    font-size: 0.82rem;
    font-family: var(--font-sans);
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    transform: translateY(-4px);
    transition: opacity 0.2s ease, transform 0.2s ease;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    z-index: 1100;
}

.lang-tooltip::before {
    content: '';
    position: absolute;
    top: -5px;
    right: 18px;
    width: 8px;
    height: 8px;
    background: var(--bg-alt);
    border-left: 1px solid var(--border-color);
    border-top: 1px solid var(--border-color);
    transform: rotate(45deg);
}

.lang-toggle:hover .lang-tooltip,
.lang-toggle:focus-within .lang-tooltip {
    opacity: 1;
    transform: translateY(0);
}

/* Notification toast */
.lang-notification {
    position: fixed;
    top: 96px;
    right: 1.5rem;
    background: rgba(13, 19, 38, 0.95);
    color: var(--text-light);
    border: 1px solid var(--accent);
    border-radius: 8px;
    padding: 0.75rem 1.1rem;
    font-size: 0.9rem;
    font-family: var(--font-sans);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(10px);
    opacity: 0;
    transform: translateY(-12px);
    pointer-events: none;
    transition: opacity 0.35s ease, transform 0.35s ease;
    z-index: 1200;
    max-width: calc(100% - 3rem);
}

.lang-notification::before {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    margin-right: 0.55rem;
    vertical-align: middle;
}

.lang-notification.show {
    opacity: 1;
    transform: translateY(0);
}

/* HERO SECTION */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    padding-top: 80px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: linear-gradient(135deg, rgba(7, 11, 25, 0.9) 0%, rgba(7, 11, 25, 0.6) 100%), url('assets/images/hero_bg.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    z-index: -1;
}

.hero-text {
    max-width: 800px;
}

.pre-title {
    font-family: var(--font-sans);
    color: var(--accent);
    font-size: 1rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.main-title {
    font-size: clamp(3rem, 5vw, 5rem);
    margin-bottom: 1.5rem;
}

.hero-desc {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: 1.5rem;
}

/* ABOUT SECTION */
.about-grid {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 4rem;
    align-items: center;
}

.about-text p {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 2rem;
    text-align: center;
    border-radius: 8px;
    backdrop-filter: blur(10px);
}

.stat-card h3 {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 0.5rem;
}

.stat-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* TIMELINE */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 20px;
    height: 100%;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    padding-left: 60px;
    margin-bottom: 3rem;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: 11px;
    top: 0;
    width: 20px;
    height: 20px;
    background: var(--bg-alt);
    border: 2px solid var(--accent);
    border-radius: 50%;
    z-index: 2;
}

.timeline-content {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    transition: var(--transition);
}

.timeline-content:hover {
    border-color: rgba(212, 175, 55, 0.4);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.timeline-header h3 {
    font-family: var(--font-sans);
    font-size: 1.3rem;
    margin: 0;
}

.timeline-date {
    color: var(--accent);
    font-size: 0.9rem;
    font-weight: 500;
}

.timeline-content h4 {
    font-family: var(--font-sans);
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 400;
    margin-bottom: 1rem;
}

.timeline-content ul {
    list-style-type: disc;
    padding-left: 1.2rem;
    color: var(--text-muted);
}

.timeline-content li {
    margin-bottom: 0.5rem;
}

/* CARDS GRID (Education) */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 2.5rem 2rem;
    border-radius: 8px;
    transition: var(--transition);
}

.card:hover {
    border-color: rgba(212, 175, 55, 0.4);
    transform: translateY(-5px);
}

.card-icon {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 1.5rem;
    font-style: italic;
}

.card h3 {
    font-family: var(--font-sans);
    font-size: 1.25rem;
    margin-bottom: 0.2rem;
}

.card-subtitle {
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.card-date {
    font-size: 0.85rem;
    color: var(--accent);
    margin-bottom: 1rem;
}

.card p:last-child {
    color: var(--text-muted);
}

/* SKILLS */
.skills-wrapper {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
}

.skills-col h3 {
    font-family: var(--font-sans);
    font-size: 1.2rem;
    color: var(--accent);
    margin-bottom: 1.5rem;
}

.chip-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.chip {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 0.6rem 1.2rem;
    border-radius: 50px;
    font-size: 0.9rem;
    color: var(--text-light);
    transition: var(--transition);
}

.chip:hover {
    border-color: var(--accent);
    background: rgba(212, 175, 55, 0.1);
}

/* CONTACT */
.contact-desc {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 3rem auto;
}

.contact-methods {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

/* FOOTER */
footer {
    background: #040710;
    padding: 3rem 0;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-content p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.social-links {
    display: flex;
    gap: 1.5rem;
}

.social-links a {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.social-links a:hover {
    color: var(--accent);
}

/* ANIMATIONS & REVEAL CLASSES */
.fade-in {
    animation: fadeIn 1s ease forwards;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.reveal {
    opacity: 0;
    transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

.reveal.active {
    opacity: 1;
    transform: translate(0, 0) scale(1);
}

.reveal-up { transform: translateY(50px); }
.reveal-left { transform: translateX(-50px); }
.reveal-fade { transform: translateY(20px); }
.reveal-scale { transform: scale(0.95); }

/* RESPONSIVE DESIGN */
@media (max-width: 900px) {
    .about-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
        width: 30px;
        height: 20px;
        position: relative;
        z-index: 1001;
    }
    
    .hamburger, .hamburger::before, .hamburger::after {
        content: '';
        display: block;
        width: 100%;
        height: 2px;
        background: var(--text-light);
        position: absolute;
        transition: var(--transition);
    }
    
    .hamburger { top: 9px; }
    .hamburger::before { top: -9px; }
    .hamburger::after { top: 9px; }
    
    .menu-toggle.active .hamburger { background: transparent; }
    .menu-toggle.active .hamburger::before { top: 0; transform: rotate(45deg); }
    .menu-toggle.active .hamburger::after { top: 0; transform: rotate(-45deg); }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background: var(--bg-dark);
        flex-direction: column;
        justify-content: center;
        transition: right 0.4s ease;
        border-left: 1px solid var(--border-color);
        padding: 2rem;
    }

    .nav-links.active {
        right: 0;
    }
    
    .hero-actions {
        flex-direction: column;
    }
}

@media (max-width: 600px) {
    .section { padding: 4rem 0; }
    .section-title { font-size: 2rem; }
    .timeline::before { left: 10px; }
    .timeline-dot { left: 1px; }
    .timeline-item { padding-left: 40px; }

    .lang-flag { width: 22px; height: 16px; }
    .lang-toggle { padding: 0.3rem 0.45rem; gap: 0.3rem; }
    .lang-notification {
        top: auto;
        bottom: 1rem;
        right: 1rem;
        left: 1rem;
        text-align: center;
        font-size: 0.85rem;
    }
    .lang-tooltip {
        right: auto;
        left: 50%;
        transform: translateX(-50%) translateY(-4px);
        white-space: normal;
        max-width: 220px;
        text-align: center;
    }
    .lang-tooltip::before { right: auto; left: calc(50% - 4px); }
    .lang-toggle:hover .lang-tooltip,
    .lang-toggle:focus-within .lang-tooltip {
        transform: translateX(-50%) translateY(0);
    }
}