/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 1rem;
    text-decoration: none;
    cursor: pointer;
    transition: all 200ms cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid transparent;
}

.btn-primary {
    background-color: var(--accent-primary);
    color: #ffffff;
    border-color: rgba(240, 246, 252, 0.1);
    box-shadow: 0 0 0 transparent;
}

.btn-primary:hover {
    background-color: var(--accent-primary-hover);
    border-color: rgba(240, 246, 252, 0.2);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(35, 134, 54, 0.2);
}

.btn-secondary {
    background-color: var(--bg-surface);
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--border-color);
    border-color: var(--border-hover);
    transform: translateY(-1px);
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background-color: rgba(13, 17, 23, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    transition: transform 0.3s ease, background-color 0.3s ease;
}

.navbar.scrolled {
    background-color: rgba(13, 17, 23, 0.9);
    border-bottom-color: rgba(48, 54, 61, 0.8);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.nav-brand {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: var(--space-5);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 150ms ease;
    position: relative;
}

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

/* Hamburger */
.hamburger {
    display: none;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    padding: 8px;
    width: 40px;
    height: 40px;
}

.hamburger span {
    display: block;
    width: 20px;
    height: 2px;
    background-color: var(--text-primary);
    margin: 4px auto;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@media (max-width: 768px) {
    .nav-links {
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background-color: var(--bg-surface);
        border-bottom: 1px solid var(--border-color);
        flex-direction: column;
        gap: 0;
        clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
        transition: clip-path 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .nav-links.active {
        clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
    }
    .nav-link {
        padding: var(--space-4);
        border-bottom: 1px solid rgba(48, 54, 61, 0.3);
        display: block;
        text-align: center;
    }
    .hamburger { display: block; }
    .hamburger.active span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
    .hamburger.active span:nth-child(2) { opacity: 0; }
    .hamburger.active span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
}

/* Hero Component */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 72px;
}

.hero-content {
    max-width: 800px;
}

.hero-badge {
    display: inline-block;
    padding: 6px 14px;
    background-color: rgba(35, 134, 54, 0.1);
    color: var(--accent-primary-hover);
    border: 1px solid rgba(35, 134, 54, 0.2);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--space-4);
}

.hero-title {
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.05;
    margin-bottom: var(--space-4);
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: var(--space-5);
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: var(--space-3);
}

/* Cards */
.card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
    transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(800px circle at top left, rgba(255,255,255,0.03), transparent 40%);
    opacity: 0;
    transition: opacity 200ms ease;
    pointer-events: none;
}

.card:hover {
    transform: scale(1.02);
    border-color: var(--border-hover);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
    z-index: 2;
}

.card:hover::before {
    opacity: 1;
}

.card-inner {
    padding: var(--space-4);
    display: flex;
    flex-direction: column;
    height: 100%;
    z-index: 1;
    position: relative;
}

/* Project Card specifics */
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-4);
}

.project-icon {
    color: var(--accent-secondary);
    background-color: rgba(88, 166, 255, 0.1);
    padding: 10px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-links {
    display: flex;
    gap: var(--space-2);
}

.icon-link {
    color: var(--text-secondary);
    transition: color 150ms ease;
    padding: 4px;
}

.icon-link:hover {
    color: var(--text-primary);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.card-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: var(--space-4);
    flex-grow: 1;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.tag {
    font-size: 0.75rem;
    font-weight: 500;
    padding: 4px 10px;
    border-radius: 12px;
    border: 1px solid;
}

.tag-blue { background-color: var(--tag-blue-bg); border-color: var(--tag-blue-border); color: var(--tag-blue-text); }
.tag-green { background-color: var(--tag-green-bg); border-color: var(--tag-green-border); color: var(--tag-green-text); }
.tag-purple { background-color: var(--tag-purple-bg); border-color: var(--tag-purple-border); color: var(--tag-purple-text); }
.tag-orange { background-color: var(--tag-orange-bg); border-color: var(--tag-orange-border); color: var(--tag-orange-text); }
.tag-yellow { background-color: var(--tag-yellow-bg); border-color: var(--tag-yellow-border); color: var(--tag-yellow-text); }

/* Skills List */
.skill-category {
    background-color: transparent;
    border-top: 1px solid var(--border-color);
    padding-top: var(--space-3);
}

.skill-category-title {
    font-size: 1.1rem;
    margin-bottom: var(--space-3);
}

.skill-list {
    list-style: none;
}

.skill-list li {
    display: flex;
    align-items: center;
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: var(--space-2);
}

.skill-bullet {
    width: 6px;
    height: 6px;
    background-color: var(--accent-secondary);
    border-radius: 50%;
    margin-right: 12px;
}

/* Certificate Card specifics */
.flex-row {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--space-4);
}

.cert-icon {
    background-color: var(--bg-primary);
    padding: 12px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.cert-date {
    display: inline-block;
    margin-top: var(--space-2);
    font-size: 0.875rem;
    font-family: monospace;
    color: var(--accent-primary-hover);
}

/* Footer */
.footer {
    border-top: 1px solid var(--border-color);
    padding: var(--space-5) 0;
    margin-top: var(--space-7);
    background-color: var(--bg-secondary);
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.footer-brand .logo {
    font-size: 1.25rem;
    font-weight: 700;
}
.footer-brand .logo span { color: var(--accent-secondary); }

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: var(--space-1);
}

.footer-links {
    display: flex;
    gap: var(--space-3);
}

.footer-links a {
    color: var(--text-secondary);
    transition: color 150ms ease;
}

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

.footer-copyright {
    flex-basis: 100%;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-top: var(--space-4);
}