:root {
    --tg-theme-bg-color: #1a1a2e;
    --tg-theme-text-color: #ffffff;
    --tg-theme-hint-color: #8b8b9e;
    --tg-theme-link-color: #2AABEE;
    --tg-theme-button-color: #2AABEE;
    --tg-theme-button-text-color: #ffffff;
    --tg-theme-secondary-bg-color: #16213e;
    --card-bg: #1e2a4a;
    --card-border: rgba(42, 171, 238, 0.1);
    --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --radius: 16px;
    --radius-sm: 12px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--tg-theme-bg-color);
    color: var(--tg-theme-text-color);
    min-height: 100vh;
    padding-bottom: 20px;
    overflow-x: hidden;
}

.profile-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 24px 20px;
    background: linear-gradient(135deg, var(--tg-theme-secondary-bg-color), var(--tg-theme-bg-color));
}

.profile-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--tg-theme-link-color), #1a8fd1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    box-shadow: 0 4px 15px rgba(42, 171, 238, 0.3);
}

.profile-name {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 4px;
}

.profile-bio {
    font-size: 14px;
    color: var(--tg-theme-hint-color);
}

.categories-nav {
    display: flex;
    gap: 8px;
    padding: 16px 20px;
    overflow-x: auto;
    scrollbar-width: none;
}

.categories-nav::-webkit-scrollbar {
    display: none;
}

.category-chip {
    flex-shrink: 0;
    padding: 8px 16px;
    border-radius: 20px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--tg-theme-text-color);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.category-chip.active {
    background: var(--tg-theme-link-color);
    border-color: var(--tg-theme-link-color);
    color: white;
}

.category-chip:hover {
    transform: translateY(-2px);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
    padding: 0 20px 20px;
}

.project-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 20px;
    cursor: pointer;
    transition: var(--transition);
    animation: fadeInUp 0.5s ease forwards;
    opacity: 0;
}

.project-card:nth-child(1) { animation-delay: 0.05s; }
.project-card:nth-child(2) { animation-delay: 0.1s; }
.project-card:nth-child(3) { animation-delay: 0.15s; }
.project-card:nth-child(4) { animation-delay: 0.2s; }

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-shadow);
    border-color: var(--tg-theme-link-color);
}

.project-card:active {
    transform: scale(0.98);
}

.project-icon {
    font-size: 48px;
    margin-bottom: 12px;
    display: block;
}

.project-name {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.project-description {
    font-size: 14px;
    color: var(--tg-theme-hint-color);
    line-height: 1.4;
    margin-bottom: 16px;
}

.project-btn {
    display: inline-block;
    padding: 10px 20px;
    background: var(--tg-theme-link-color);
    color: white;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition);
}

.project-btn:hover {
    background: #1a8fd1;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 20px;
    backdrop-filter: blur(4px);
}

.modal.active {
    display: flex;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 24px;
    max-width: 400px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    animation: slideUp 0.3s ease;
}

.modal-close {
    position: absolute;
    top: 12px;
    right: 12px;
    background: none;
    border: none;
    color: var(--tg-theme-hint-color);
    font-size: 24px;
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.1);
}

.modal-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.modal-icon {
    font-size: 40px;
}

.modal-title {
    font-size: 22px;
    font-weight: 700;
}

.modal-description {
    color: var(--tg-theme-hint-color);
    margin-bottom: 20px;
    line-height: 1.5;
}

.modal-features h3 {
    font-size: 16px;
    margin-bottom: 12px;
}

.modal-features ul {
    list-style: none;
    margin-bottom: 20px;
}

.modal-features li {
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
    color: var(--tg-theme-hint-color);
    font-size: 14px;
}

.modal-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--tg-theme-link-color);
    font-weight: bold;
}

.modal-cta {
    display: block;
    width: 100%;
    padding: 14px;
    background: var(--tg-theme-link-color);
    color: white;
    text-align: center;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: var(--transition);
}

.modal-cta:hover {
    background: #1a8fd1;
}

.loading {
    text-align: center;
    padding: 40px;
    color: var(--tg-theme-hint-color);
    grid-column: 1 / -1;
}

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

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

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 360px) {
    .projects-grid {
        grid-template-columns: 1fr;
    }
}

@media (min-width: 768px) {
    .projects-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}