/* ===== Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: #ffffff;
    color: #1a1a1a;
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

/* ===== Navigation ===== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: #ffffff;
    border-bottom: 1px solid #f0f0f0;
    z-index: 100;
}

.nav-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 1.25rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 600;
    font-size: 1.1rem;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    font-size: 0.9rem;
    color: #666;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: #1a1a1a;
}

/* ===== Sections ===== */
.section {
    padding: 6rem 2rem;
}

.container {
    max-width: 600px;
    margin: 0 auto;
}

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

.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

/* ===== Hero ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    text-align: center;
}

.hero .container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-greeting {
    font-size: 1rem;
    color: #888;
    margin-bottom: 0.5rem;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 600;
    letter-spacing: -0.03em;
    margin-bottom: 0.5rem;
}

.hero-subtitle {
    font-size: 1rem;
    color: #666;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.hero-subtitle:last-of-type {
    margin-bottom: 2.5rem;
}

/* ===== Button ===== */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    background: #1a1a1a;
    color: #ffffff;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
}

.btn:hover {
    background: #333;
    transform: translateY(-1px);
}

/* ===== Portfolio ===== */
/* ===== Portfolio ===== */
#portfolio {
    text-align: center;
}

#portfolio .container {
    max-width: 1100px;
}

.section-intro {
    font-size: 1rem;
    color: #666;
    line-height: 1.6;
    max-width: 800px;
    margin: 0 auto 1.5rem;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.portfolio-item {
    padding: 3rem 2rem;
    background: #faf5ff;
    border-radius: 12px;
    text-align: center;
    min-height: 400px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.portfolio-item h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.portfolio-item p {
    font-size: 0.95rem;
    color: #666;
}

@media (max-width: 768px) {
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== Contact ===== */
#contact {
    text-align: center;
}

.contact-text {
    color: #666;
    margin-bottom: 2rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1px solid #e5e5e5;
    border-radius: 6px;
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color 0.2s;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: #1a1a1a;
}

.contact-form textarea {
    resize: vertical;
}

.contact-form .btn {
    align-self: flex-start;
    margin-top: 0.5rem;
}

.contact-links {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-bottom: 2.5rem;
    justify-content: center;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #555;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.contact-link:hover {
    color: #1a1a1a;
}

.contact-link svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

/* ===== Footer ===== */
.footer {
    padding: 2rem;
    text-align: center;
    border-top: 1px solid #f0f0f0;
}

.footer p {
    color: #999;
    font-size: 0.85rem;
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
    .nav-container {
        padding: 1rem 1.5rem;
    }

    .nav-links {
        gap: 1.5rem;
    }

    .section {
        padding: 4rem 1.5rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }
}

/* ===== Portfolio Item Hover Effects ===== */
.portfolio-item {
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}

.portfolio-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(147, 51, 234, 0.15);
}

.click-hint {
    display: inline-block;
    margin-top: 1rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: #a855f7;
    /* Always visible */
    opacity: 1;
    transform: none;
    transition: transform 0.3s ease;
}

.portfolio-item:hover .click-hint {
    transform: translateX(5px);
}

.portfolio-icon {
    margin-bottom: 1.5rem;
    color: #1a1a1a;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: transform 0.3s ease;
}

.portfolio-item:hover .portfolio-icon {
    transform: scale(1.1);
    color: #7c3aed;
}

.portfolio-icon svg {
    width: 48px;
    height: 48px;
    stroke-width: 1.5;
}

/* ===== Modal Styles ===== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    padding: 2rem;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: #ffffff;
    border-radius: 16px;
    max-width: 800px;
    width: 100%;
    max-height: 85vh;
    overflow-y: auto;
    position: relative;
    transform: scale(0.9) translateY(20px);
    transition: transform 0.3s ease;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.25);
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
    border: none;
    background: #f5f5f5;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #666;
    transition: background 0.2s, color 0.2s;
    z-index: 10;
}

.modal-close:hover {
    background: #1a1a1a;
    color: #fff;
}

.modal-content {
    padding: 2.5rem;
}

.modal-header {
    margin-bottom: 1.5rem;
}

.modal-title {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.modal-subtitle {
    color: #a855f7;
    font-size: 0.9rem;
    font-weight: 500;
}

.modal-description {
    font-size: 1rem;
    color: #555;
    line-height: 1.7;
    margin-bottom: 2rem;
}

.modal-section {
    margin-bottom: 2rem;
}

.modal-section-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1a1a1a;
}

.modal-media-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.modal-media-grid img,
.modal-media-grid video {
    width: 100%;
    border-radius: 8px;
    background: #f5f5f5;
}

.modal-media-grid img {
    aspect-ratio: 16/10;
    object-fit: cover;
}

.modal-media-grid video {
    aspect-ratio: 16/9;
}

.modal-tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-tag {
    padding: 0.4rem 0.8rem;
    background: #faf5ff;
    color: #7c3aed;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.modal-links {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.modal-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: #1a1a1a;
    color: #fff;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: background 0.2s, transform 0.2s;
}

.modal-link:hover {
    background: #333;
    transform: translateY(-2px);
}

.modal-link.secondary {
    background: transparent;
    color: #1a1a1a;
    border: 1px solid #e5e5e5;
}

.modal-link.secondary:hover {
    background: #f5f5f5;
}

/* Modal Responsive */
@media (max-width: 640px) {
    .modal-overlay {
        padding: 1rem;
    }

    .modal-content {
        padding: 1.5rem;
    }

    .modal-title {
        font-size: 1.5rem;
    }

    .modal-media-grid {
        grid-template-columns: 1fr;
    }

    .modal-links {
        flex-direction: column;
    }
}