/* 
  RZ. Personal Consultant Website - Design System
  Theme: Deep Navy & Strong Blue
  Focus: Modern, Professional, Premium
*/

:root {
    /* Color Palette — deep blue base, higher-chroma accent */
    --bg-main: #070b14;
    --bg-alt: #0c1524;
    --primary: #4d7cff;
    --primary-hover: #6e96ff;
    --primary-glow: rgba(77, 124, 255, 0.42);
    --secondary: #38bdf8;
    --text-main: #eef2f7;
    --text-muted: #94a3b8;
    --glass-bg: rgba(255, 255, 255, 0.035);
    --glass-border: rgba(255, 255, 255, 0.09);
    --navbar-height: 80px;

    /* Typography — Direction A: sans body + serif headings; Latin UI via DM Sans */
    --font-heading: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", serif;
    --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", system-ui, sans-serif;
    --font-ui: "DM Sans", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;

    /* Transitions */
    --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: var(--font-body);
    font-weight: 400;
    line-height: 1.65;
    overflow-x: hidden;
}

body.dark-theme {
    background-color: var(--bg-main);
}

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

section {
    position: relative;
}

.section-padding {
    padding: 76px 0;
}

.text-gradient {
    background: linear-gradient(135deg, #f8fafc 0%, var(--primary) 55%, var(--secondary) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Base Typography */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: -0.02em;
}

p {
    color: var(--text-muted);
    max-width: 65ch;
}

.about-text p,
.project-content p,
.contact-info p,
.service-card p {
    max-width: none;
}

/* Custom Cursor — position via transform (left/top + animate() breaks with translate(-50%) in some browsers) */
.cursor-dot,
.cursor-outline {
    pointer-events: none;
    position: fixed;
    left: 0;
    top: 0;
    border-radius: 50%;
    z-index: 9999;
    opacity: 0;
    will-change: transform;
}

.cursor-dot {
    width: 8px;
    height: 8px;
    background-color: var(--primary);
}

.cursor-outline {
    width: 30px;
    height: 30px;
    border: 1.5px solid var(--primary);
    transition: transform 0.2s ease-out;
}

@media (pointer: coarse) {
    .cursor-dot,
    .cursor-outline {
        display: none;
    }
}

@media (prefers-reduced-motion: reduce) {
    .cursor-outline {
        transition: none;
    }
}

/* UI Components */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 1.8rem;
    border-radius: 4px;
    font-family: var(--font-ui);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    gap: 10px;
    border: none;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 18px rgba(77, 124, 255, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    background: var(--primary-hover);
    box-shadow: 0 8px 28px rgba(77, 124, 255, 0.45);
}

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

.btn-outline:hover {
    background: var(--glass-bg);
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
}

.badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    font-family: var(--font-ui);
    background: rgba(77, 124, 255, 0.12);
    color: var(--primary);
    border: 1px solid rgba(77, 124, 255, 0.28);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 2rem;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--navbar-height);
    background: transparent;
    z-index: 1000;
    transition: var(--transition);
    display: flex;
    align-items: center;
}

.navbar.scrolled {
    background: rgba(10, 10, 11, 0.85);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--glass-border);
    height: 70px;
}

.nav-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-ui);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-main);
    text-decoration: none;
    letter-spacing: -0.03em;
}

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

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

.nav-link {
    font-family: var(--font-ui);
    color: var(--text-main);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
    opacity: 0.7;
}

.nav-link:hover {
    opacity: 1;
    color: var(--primary);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-main);
    font-size: 1.8rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.4;
    filter: saturate(0.5) brightness(0.8);
}

.gradient-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, transparent, var(--bg-main));
}

.glow-orb {
    position: absolute;
    width: 40vw;
    height: 40vw;
    background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
    filter: blur(80px);
    border-radius: 50%;
    z-index: -1;
    opacity: 0.3;
}

.orb-1 { top: -10%; right: -5%; }
.orb-2 { bottom: 0%; left: -10%; }

.hero-content {
    max-width: 1000px;
    margin: 0 auto;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.2rem;
    max-width: 600px;
    margin-bottom: 2.5rem;
}

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

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-image-wrapper {
    position: relative;
    overflow: visible;
}

.image-glass-card {
    padding: 15px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    display: inline-block;
    position: relative;
    overflow: visible;
}

.profile-img {
    width: 100%;
    max-width: 450px;
    border-radius: 12px;
    display: block;
}

.experience-badge {
    position: absolute;
    bottom: 30px;
    right: -30px;
    background: rgba(77, 124, 255, 0.95);
    padding: 1.25rem 1.35rem;
    border-radius: 12px;
    color: #fff;
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    max-width: min(240px, calc(100vw - 3rem));
    z-index: 2;
}

.experience-badge .number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    line-height: 1;
}

.experience-badge .text {
    display: block;
    font-size: 0.8rem;
    opacity: 0.9;
    line-height: 1.45;
    word-break: keep-all;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    line-height: 1.3;
}

.lead {
    font-size: 1.1rem;
    color: var(--text-main);
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.about-text p {
    margin-bottom: 1.5rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.stat-item .stat-num {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-family: var(--font-ui);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Expertise / Services Section */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 2.5rem;
}

.section-desc {
    font-size: 1.1rem;
    max-width: none;
}

/* Fit Section */
.fit-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.fit-card {
    padding: 2rem;
    min-height: 260px;
    transition: var(--transition);
}

.fit-card:hover {
    transform: translateY(-6px);
    border-color: rgba(77, 124, 255, 0.45);
    background: rgba(255, 255, 255, 0.05);
}

.fit-index {
    display: inline-flex;
    margin-bottom: 1.5rem;
    font-family: var(--font-ui);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--secondary);
    letter-spacing: 0.12em;
}

.fit-card h3 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
    color: var(--text-main);
}

.fit-card p {
    font-size: 0.95rem;
}

.service-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.service-card {
    padding: 3rem;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.05);
}

.card-icon {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 2rem;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-main);
}

.service-card p {
    margin-bottom: 2rem;
}

.service-features {
    list-style: none;
}

.service-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 0.8rem;
    font-size: 0.9rem;
}

.service-features i {
    color: var(--primary);
}

/* Projects Section */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    padding: 0;
    overflow: hidden;
    position: relative;
    cursor: pointer;
}

.project-content {
    padding: 2.5rem;
    position: relative;
    z-index: 2;
}

.highlight-text {
    font-family: var(--font-ui);
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 1rem;
}

.project-card h3 {
    margin-bottom: 1rem;
}

.project-card p:not(.highlight-text) {
    font-size: 0.95rem;
}

.project-proof {
    display: grid;
    gap: 0.85rem;
}

.project-proof p {
    display: grid;
    grid-template-columns: 3rem 1fr;
    gap: 0.85rem;
    margin: 0;
    line-height: 1.55;
}

.project-proof strong {
    font-family: var(--font-ui);
    color: var(--secondary);
    font-size: 0.78rem;
    letter-spacing: 0.08em;
}

.project-proof span {
    color: var(--text-muted);
}

/* Methodology Section */
.process-wrapper {
    display: grid;
    grid-template-columns: 1fr 2fr;
    padding: 4rem;
    gap: 5rem;
}

.process-text h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.process-steps {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.step-item {
    position: relative;
    padding-left: 4rem;
}

.step-num {
    position: absolute;
    left: 0;
    top: 0;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    opacity: 0.5;
}

.step-item h4 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-main);
}

/* Contact Section */
.contact-box {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
    padding: 4rem;
}

.contact-info h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.contact-details {
    list-style: none;
    margin-top: 3rem;
}

.contact-details li {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-main);
}

.contact-details a {
    color: var(--text-main);
    text-decoration: underline;
    text-underline-offset: 3px;
}

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

.contact-details i {
    font-size: 1.5rem;
    color: var(--primary);
}

.contact-form {
    display: grid;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-family: var(--font-ui);
    font-size: 0.9rem;
    font-weight: 500;
    opacity: 0.8;
}

.form-group input, 
.form-group select, 
.form-group textarea {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    padding: 1rem;
    border-radius: 4px;
    color: #fff;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus, 
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.05);
}

.btn-block {
    width: 100%;
}

/* Footer */
.footer {
    padding: 60px 0 30px;
    border-top: 1px solid var(--glass-border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

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

.footer-brand p,
.footer-bottom p {
    max-width: none;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--glass-border);
    font-size: 0.85rem;
}

/* Animations (Reveal Effects) — keep opacity at 1 so content is never invisible if JS fails to load */
.reveal-up {
    opacity: 1;
    transform: translateY(30px);
    transition: transform 0.8s ease-out, opacity 0.8s ease-out;
}

.reveal-left {
    opacity: 1;
    transform: translateX(-30px);
    transition: transform 0.8s ease-out, opacity 0.8s ease-out;
}

.reveal-right {
    opacity: 1;
    transform: translateX(30px);
    transition: transform 0.8s ease-out, opacity 0.8s ease-out;
}

.reveal-visible {
    opacity: 1 !important;
    transform: translate(0) !important;
}

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

.fade-up {
    animation: fadeUp 1s ease forwards;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsive Styles */
@media (max-width: 992px) {
    .about-grid, .service-cards, .process-wrapper, .contact-box {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .fit-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .process-wrapper {
        padding: 2rem;
    }

    .nav-links {
        display: none; /* Mobile menu needed */
    }

    .mobile-menu-btn {
        display: block;
    }

    .experience-badge {
        right: 10px;
    }
}

@media (max-width: 768px) {
    .section-padding {
        padding: 52px 0;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }

    .fit-grid,
    .project-grid {
        grid-template-columns: 1fr;
    }

    .fit-card {
        min-height: auto;
    }

    .project-proof p {
        grid-template-columns: 1fr;
        gap: 0.25rem;
    }

    .footer-content {
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }
}

/* QR Code Styling */
.qr-container {
    margin-top: 2.5rem;
}

.qr-card {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    padding: 1.5rem;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--glass-border);
    max-width: 220px;
}

.qr-code {
    width: 100%;
    aspect-ratio: 1/1;
    border-radius: 8px;
    margin-bottom: 1rem;
    filter: drop-shadow(0 0 10px rgba(77, 124, 255, 0.25));
}

.qr-hint {
    font-size: 0.85rem;
    color: var(--primary);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
}

.mt-4 {
    margin-top: 2rem !important;
}

/* Language Switcher */
.lang-switch-btn {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-main);
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
    margin-right: 1rem;
    font-family: var(--font-ui);
}

a.lang-switch-btn {
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
}

.lang-switch-btn:hover {
    background: var(--glass-bg);
    border-color: var(--primary);
    color: var(--primary);
}

@media (max-width: 992px) {
    .lang-switch-btn {
        margin: 1rem 0;
        width: 100%;
        text-align: center;
    }
}