:root {
    --primary: #4CAF50;
    --primary-dark: #3e8e41;
    --dark: #1a1a1a;
    --darker: #111;
    --light: #fff;
    --gray: #2a2a2a;
    --shadow: 0 4px 8px rgba(0,0,0,0.2);
    --shadow-lg: 0 6px 12px rgba(0,0,0,0.25);
    --transition: all 0.3s ease;
}

body.light-theme {
    --dark: #f5f5f5;
    --darker: #e0e0e0;
    --light: #333;
    --gray: #e0e0e0;
    background: linear-gradient(135deg, #f5f5f5, #e0e0e0);
    color: #333;
}

body.light-theme .hero-section {
    background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), linear-gradient(135deg, #aaa, #888) !important;
}

body.light-theme .logo img {
    border-color: #888;
    box-shadow: 0 0 30px rgba(136, 136, 136, 0.6);
}

body.light-theme .title {
    background: linear-gradient(to right, #888, #666);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

body.light-theme .section-title {
    color: #666;
}

body.light-theme .section-title::after {
    background: #666;
}

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

@keyframes fadeUp {
    from { 
        opacity: 0;
        transform: translateY(25px);
    }
    to { 
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.animate-on-scroll {
    opacity: 0;
    transition: all 0.6s ease-out;
}

.animate-fadeIn {
    animation: fadeIn 0.8s ease-out forwards;
}

.animate-fadeUp {
    animation: fadeUp 0.8s ease-out forwards;
}

.animate-pulse {
    animation: pulse 2s infinite ease-in-out;
}

/* Hero section */
.hero-section {
    position: relative;
    height: 60vh;
    background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('photo/background/backgroundPaymanagir.jpg') no-repeat center center/cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, transparent 20%, var(--dark) 70%);
    opacity: 0.6;
    z-index: 1;
}

.logo img {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    border: 4px solid var(--light);
    box-shadow: 0 0 25px rgba(76, 175, 80, 0.6);
    transition: transform 0.5s, box-shadow 0.5s;
    animation: pulse 4s infinite ease-in-out;
}

.title {
    background: linear-gradient(to right, var(--primary), #8BC34A);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-size: 1.8rem;
    margin: 15px 0;
    text-shadow: 0 3px 10px rgba(0,0,0,0.5);
    animation: fadeUp 1s ease-in-out 0.2s both;
}

.section-title {
    text-align: center;
    font-size: 1.5rem;
    margin-bottom: 30px;
    color: var(--primary);
    position: relative;
    text-shadow: 0 2px 5px rgba(0,0,0,0.3);
}

.section-title::after {
    content: '';
    width: 50px;
    height: 3px;
    background: var(--primary);
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: -10px;
    border-radius: 2px;
    box-shadow: 0 2px 5px rgba(76, 175, 80, 0.5);
}

.contract-text {
    background: var(--darker);
    border-radius: 12px;
    padding: 20px;
    margin: 20px 0;
    font-size: 14px;
    line-height: 1.6;
    box-shadow: var(--shadow);
}

.download-buttons {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin: 20px 0;
}

.download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 15px;
    border-radius: 10px;
    background: linear-gradient(to right, var(--primary), var(--primary-dark));
    color: white;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.lang-switch {
    display: flex;
    gap: 6px;
    padding: 4px 6px;
    background: rgba(0,0,0,0.7);
    border: 2px solid var(--primary);
    border-radius: 999px;
}
.lang-btn {
    border: none;
    background: transparent;
    color: #fff;
    font-weight: 700;
    font-size: 12px;
    padding: 8px 12px;
    border-radius: 999px;
    transition: var(--transition);
}
.lang-btn.active {
    background: var(--primary);
    color: #0b1324;
}

.telegram-section {
    background: var(--darker);
    border-radius: 12px;
    padding: 20px;
    margin: 30px 0;
    box-shadow: var(--shadow);
}

.telegram-img {
    width: 100%;
    border-radius: 10px;
    margin: 15px 0;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
}

.telegram-img:hover {
    transform: scale(1.02);
}

.telegram-text {
    font-size: 14px;
    line-height: 1.6;
    margin-top: 15px;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    border-radius: 30px;
    background: var(--gray);
    color: white;
    font-weight: 600;
    text-decoration: none;
    margin: 20px 0;
    transition: var(--transition);
}

.back-btn:hover {
    background: var(--primary);
    transform: translateY(-3px);
}

.book-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px 30px;
    border-radius: 30px;
    background: linear-gradient(to right, var(--primary), var(--primary-dark));
    color: white;
    font-weight: 700;
    text-decoration: none;
    margin: 30px 0;
    box-shadow: var(--shadow);
    transition: var(--transition);
    font-size: 1.1rem;
}

.book-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}