@font-face {
    font-family: 'IRANSans';
    src: url('../fonts/IRANSansWeb_Light.woff2') format('woff2');
    font-weight: 300;
    font-display: swap;
}

@font-face {
    font-family: 'IRANSans';
    src: url('../fonts/IRANSansWeb_Medium.woff2') format('woff2');
    font-weight: 500;
    font-display: swap;
}

@font-face {
    font-family: 'IRANSans';
    src: url('../fonts/IRANSansWeb_Bold.woff2') format('woff2');
    font-weight: 700;
    font-display: swap;
}

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

:root {
    --primary-color: #00b894;
    --primary-dark: #00a085;
    --primary-light: #55efc4;
    --secondary-color: #0984e3;
    --secondary-dark: #0767b3;
    --accent-color: #fdcb6e;
    --text-primary: #2d3436;
    --text-secondary: #636e72;
    --text-light: #b2bec3;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-dark: #2d3436;
    --border-color: #dfe6e9;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 50px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'IRANSans', sans-serif;
    font-weight: 300;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: linear-gradient(135deg, rgba(0, 184, 148, 0.05) 0%, rgba(9, 132, 227, 0.05) 100%);
    z-index: -2;
}

#threejs-bg {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: -1;
    pointer-events: none;
    opacity: 0.7;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1rem;
}

h1 {
    font-size: 3.5rem;
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 1.8rem;
}

h4 {
    font-size: 1.4rem;
}

p {
    margin-bottom: 1rem;
}

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

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

button {
    font-family: 'IRANSans', sans-serif;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: 6rem 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.8rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    right: 50%;
    transform: translateX(50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(to left, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 0.8rem 2rem;
    border-radius: var(--radius-full);
    font-weight: 500;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: linear-gradient(135deg, var(--primary-dark), var(--secondary-dark));
    opacity: 0;
    transition: var(--transition);
    z-index: -1;
}

.btn-primary:hover::before {
    opacity: 1;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    padding: 0.8rem 2rem;
    border-radius: var(--radius-full);
    font-weight: 500;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border: 2px solid var(--primary-color);
    cursor: pointer;
    transition: var(--transition);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    padding: 0.8rem 2rem;
    border-radius: var(--radius-full);
    font-weight: 500;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition);
}

.btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

.wave-animation {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    overflow: hidden;
    line-height: 0;
}

.wave-animation svg {
    position: relative;
    display: block;
    width: calc(100% + 1.3px);
    height: 100px;
}

.wave-animation .shape-fill {
    fill: var(--bg-secondary);
}

@media (max-width: 1200px) {
    h1 {
        font-size: 3rem;
    }
    
    h2 {
        font-size: 2.2rem;
    }
    
    section {
        padding: 5rem 0;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    h1 {
        font-size: 2.5rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    section {
        padding: 4rem 0;
    }
    
    .container {
        padding: 0 1.5rem;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    section {
        padding: 3rem 0;
    }
    
    .container {
        padding: 0 1rem;
    }
}