/* --- مدرن‌سازی و متغیرهای رنگی پیشرفته --- */
:root[data-theme="dark"] {
    --bg-main: #0b0f19;
    --bg-surface: rgba(22, 30, 49, 0.7);
    --bg-card: rgba(30, 41, 59, 0.5);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #38bdf8;
    --accent-glow: rgba(56, 189, 248, 0.4);
    --border: rgba(255, 255, 255, 0.08);
    --glass-blur: blur(12px);
}

:root[data-theme="light"] {
    --bg-main: #f8fafc;
    --bg-surface: rgba(241, 245, 249, 0.8);
    --bg-card: rgba(255, 255, 255, 0.8);
    --text-main: #0f172a;
    --text-muted: #64748b;
    --accent: #0284c7;
    --accent-glow: rgba(2, 132, 199, 0.2);
    --border: rgba(0, 0, 0, 0.06);
    --glass-blur: blur(12px);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.7;
    overflow-x: hidden;
}

html[dir="rtl"] body {
    font-family: 'Vazirmatn', Tahoma, sans-serif;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* --- نوار ناوبری شیشه‌ای و مدرن --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--bg-surface);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 1.5rem;
}

.logo {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text-main);
    text-decoration: none;
    background: linear-gradient(45deg, var(--text-main), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-controls {
    display: flex;
    gap: 0.8rem;
}

.control-btn {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-main);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border-radius: 10px;
    font-weight: 600;
}

.control-btn:hover {
    border-color: var(--accent);
    box-shadow: 0 0 12px var(--accent-glow);
    color: var(--accent);
    transform: translateY(-2px);
}

/* --- بخش هیرو جذاب و تعاملی --- */
.hero-section {
    padding: 15rem 0 10rem 0;
    text-align: center;
    background: radial-gradient(circle at 50% 30%, var(--accent-glow), transparent 60%);
}

.hero-section h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    margin-bottom: 1.5rem;
    font-weight: 800;
    line-height: 1.2;
}

.hero-section p {
    font-size: clamp(1.1rem, 2vw, 1.3rem);
    color: var(--text-muted);
    max-width: 650px;
    margin: 0 auto 2.5rem auto;
}

.btn {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent), #06b6d4);
    color: #ffffff;
    padding: 0.9rem 2.5rem;
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 24px var(--accent-glow);
    opacity: 0.95;
}

/* --- استایل کلی بخش‌ها --- */
.section {
    padding: 8rem 0;
}

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

.section-title {
    font-size: 2.2rem;
    margin-bottom: 1rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.section-title::after {
    content: '';
    display: block;
    width: 50px;
    height: 4px;
    background: var(--accent);
    border-radius: 2px;
    margin-top: 0.5rem;
}

html[dir="rtl"] .section-title::after {
    margin-left: auto;
}

.section-desc {
    color: var(--text-muted);
    max-width: 600px;
    margin-bottom: 4rem;
    font-size: 1.1rem;
}

/* --- نوار پیشرفت مهارت‌ها مدرن و نئونی --- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.skill-item {
    background-color: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    padding: 1.8rem;
    border-radius: 16px;
    border: 1px solid var(--border);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.03);
}

.skill-item:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.skill-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.8rem;
    font-weight: 600;
    font-size: 1.05rem;
}

.skill-name-wrapper {
    display: flex;
    align-items: center;
    gap: 0.7rem;
}

.skill-name-wrapper i {
    color: var(--accent);
    font-size: 1.3rem;
}

/* نوار مدرن شیشه‌ای */
.progress-bar-bg {
    background-color: rgba(0, 0, 0, 0.1);
    width: 100%;
    height: 10px;
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid var(--border);
    position: relative;
}

.progress-bar-fill {
    background: linear-gradient(90deg, var(--accent), #22c55e);
    height: 100%;
    width: 0;
    border-radius: 20px;
    box-shadow: 0 0 10px var(--accent-glow);
}

/* --- گالری کارت‌های پروژه سه‌بعدی‌نما --- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.project-card {
    background-color: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.project-card:hover {
    transform: translateY(-8px) scale(1.02);
    border-color: var(--accent);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.project-img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    filter: brightness(0.95);
    border-bottom: 1px solid var(--border);
}

.project-card:hover .project-img {
    filter: brightness(1.1);
}

.project-content {
    padding: 2rem;
}

.project-content h3 {
    margin-bottom: 0.8rem;
    font-size: 1.4rem;
    font-weight: 700;
}

.project-content p {
    color: var(--text-muted);
    font-size: 1rem;
    margin-bottom: 1.8rem;
    height: 75px;
    overflow: hidden;
}

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

.project-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 1.3rem;
}

.project-links a:hover {
    color: var(--accent);
    transform: scale(1.1);
}

/* --- بخش تماس و فوتر بازطراحی شده --- */
.contact-container {
    text-align: center;
}

.contact-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 3rem;
    border-radius: 24px;
    max-width: 600px;
    margin: 0 auto;
}

.contact-info {
    margin: 2rem 0;
    font-size: 1.2rem;
    font-weight: 500;
}

.contact-info p {
    margin: 1rem 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.contact-info i {
    color: var(--accent);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.8rem;
    font-size: 2.2rem;
    margin-top: 2rem;
}

.social-links a {
    color: var(--text-muted);
}

.social-links a:hover {
    color: var(--accent);
    transform: translateY(-3px);
}

.footer {
    text-align: center;
    padding: 3rem;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* --- بهینه‌سازی رسپونسیو برای موبایل‌های خیلی کوچک --- */
@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .hero-section {
        padding: 12rem 0 6rem 0;
    }

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

    .contact-card {
        padding: 1.5rem;
    }
}