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

:root {
    --bg: #ffffff;
    --surface: #ffffff;
    --surface-soft: #fbfbf9;
    --text: #000000;
    --text-soft: #2f2f2f;
    --text-muted: #4f4f4f;
    --border: #e5e5e5;
    --border-soft: #e1e1e1;
    --hover: #f4f4ef;
    --hover-border: #cfcfcf;
    --link-chip-bg: #efefe9;
    --link-chip-border: #d6d6cf;
    --link-chip-shadow: #d1d1cb;
    --link-chip-hover-bg: #eaeae4;
    --toggle-hover: #eeeeee;
}

html[data-theme='dark'] {
    --bg: #000000;
    --surface: #1a1d21;
    --surface-soft: #20252a;
    --text: #f4f6f8;
    --text-soft: #d5dae0;
    --text-muted: #b2bac4;
    --border: #2d353f;
    --border-soft: #35404b;
    --hover: #26303a;
    --hover-border: #475767;
    --link-chip-bg: #26303a;
    --link-chip-border: #3a4755;
    --link-chip-shadow: #1b222a;
    --link-chip-hover-bg: #2e3a47;
    --toggle-hover: #2a2a2a;
}

body {
    font-family: 'Geist', sans-serif;
    background: var(--bg);
    color: var(--text);
    padding: 1.1rem 1.1rem 2rem;
    line-height: 1.5;
    transition: background-color 200ms ease, color 200ms ease;
}

.page-wrap {
    width: 100%;
    max-width: 820px;
    margin: 0 auto;
}

.page-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.8rem;
}

.back-home {
    display: inline-flex;
    align-items: center;
    gap: 0.42rem;
    text-decoration: none;
    color: var(--text-soft);
    font-size: 0.88rem;
    line-height: 1;
    margin-top: 0.25rem;
    margin-bottom: 1rem;
    transition: color 180ms ease, transform 180ms ease;
}

.back-home-arrow {
    display: inline-block;
    transition: transform 180ms ease;
}

.back-home-arrow svg {
    width: 0.98rem;
    height: 0.98rem;
    stroke: currentColor;
    stroke-width: 2;
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.back-home:hover {
    color: var(--text);
    transform: translateX(-2px);
}

.back-home:hover .back-home-arrow {
    transform: translateX(-3px);
}

.stack-header-container {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-top: 1.8rem;
    margin-bottom: 2rem;
}

.stack-title {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text);
    margin: 0;
    letter-spacing: -0.5px;
}

.projects-groups {
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.8rem;
}

.project-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.project-group h3 {
    margin: 0;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1.45;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.6rem;
}

.project-card {
    border: 1px solid var(--border-soft);
    background: var(--surface-soft);
    border-radius: 0.42rem;
    padding: 0.7rem;
    transition: border-color 180ms ease, background-color 180ms ease, transform 180ms ease;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: flex-start;
    height: 100%;
}

.project-card-link {
    display: flex;
    text-decoration: none;
    color: inherit;
}

a.project-card:hover {
    border-color: var(--hover-border);
    background: var(--hover);
    transform: translateY(-1px);
}

.project-title {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 700;
    font-style: italic;
    color: var(--text);
    line-height: 1.3;
}

.project-description {
    margin: 0.36rem 0 0.52rem;
    font-size: 0.8rem;
    font-weight: 400;
    color: var(--text-soft);
    line-height: 1.45;
    flex-grow: 1;
}

.project-link {
    display: inline-block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.74rem;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
    background: var(--link-chip-bg);
    border: 1px solid var(--link-chip-border);
    box-shadow: 2px 2px 0 var(--link-chip-shadow);
    border-radius: 0.24rem;
    padding: 0.22rem 0.36rem;
    transition: background-color 180ms ease;
}

a.project-card:hover .project-link {
    background: var(--link-chip-hover-bg);
}

.project-link-inactive {
    color: var(--text-muted);
    background: transparent;
    border-style: dashed;
    box-shadow: none;
    cursor: default;
}

/* Featured Project Card Styles */
.project-card-featured {
    position: relative;
    overflow: hidden;
    min-height: 240px;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: flex-start;
    background: #000;
    color: #ffffff !important;
    text-decoration: none;
    z-index: 1;
}

.project-card-featured:hover {
    border-color: var(--hover-border);
}

.project-card-ifind .project-card-bg {
    background-image: url('../../assets/images/projects/ifind-bg.webp');
}

.project-card-ishelf .project-card-bg {
    background-image: url('../../assets/images/projects/ishelf-bg.webp');
}

.project-card-dalina .project-card-bg {
    background-image: url('../../assets/images/projects/dalina-bg.webp');
}

.project-card-quicksnap .project-card-bg {
    background-image: url('../../assets/images/projects/quicksnap-bg.png');
}

.project-card-scienceapp .project-card-bg {
    background-image: url('../../assets/images/projects/scienceapp.webp');
}

.project-card-v1 .project-card-bg {
    background-image: url('../../assets/images/projects/v1-bg.png');
}

.project-card-minimalist .project-card-bg {
    background-image: url('../../assets/images/projects/minimalist-bg.png');
}

.project-card-love .project-card-bg {
    background-image: url('../../assets/images/projects/love-bg.webp');
}

.project-card-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transition: transform 0.6s cubic-bezier(0.25, 1, 0.5, 1);
    z-index: 1;
}

.project-card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.85) 0%, rgba(0, 0, 0, 0.4) 60%, rgba(0, 0, 0, 0.15) 100%);
    z-index: 2;
    transition: opacity 0.4s ease;
}

.project-card-content {
    position: relative;
    z-index: 3;
    width: 100%;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    height: 100%;
}

.project-text-group {
    transform: translateY(15px);
    transition: transform 0.5s cubic-bezier(0.25, 1, 0.5, 1);
}

.project-tags {
    display: flex;
    gap: 0.35rem;
    margin-bottom: 0.4rem;
}

.project-tag {
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: rgba(255, 255, 255, 0.2);
    color: #ffffff;
    padding: 0.15rem 0.4rem;
    border-radius: 3px;
}

.project-card-featured .project-title {
    color: #ffffff !important;
    font-size: 1.15rem;
    font-weight: 700;
    margin: 0;
}

.project-card-featured .project-description {
    color: rgba(255, 255, 255, 0.8) !important;
    font-size: 0.8rem;
    margin: 0.25rem 0 0;
}

.project-card-actions {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.4s ease, transform 0.4s ease;
    transition-delay: 0s;
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
    align-items: center;
    width: 100%;
}

.project-details-btn {
    display: inline-block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.74rem;
    font-weight: 700;
    color: var(--text);
    background: var(--link-chip-bg);
    border: 1px solid var(--link-chip-border);
    box-shadow: 2px 2px 0 var(--link-chip-shadow);
    border-radius: 0.24rem;
    padding: 0.22rem 0.36rem;
    cursor: pointer;
    transition: background-color 180ms ease, transform 100ms ease;
}

.project-details-btn:hover {
    background: var(--link-chip-hover-bg);
}

.project-details-btn:active {
    transform: translate(1px, 1px);
    box-shadow: 1px 1px 0 var(--link-chip-shadow);
}

/* Hover States */
.project-card-featured:hover .project-card-bg {
    transform: scale(1.08);
}

.project-card-featured:hover .project-text-group {
    transform: translateY(0);
}

.project-card-featured:hover .project-card-actions {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.1s;
}

/* Modal CSS */
.project-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.project-modal.is-active {
    opacity: 1;
    pointer-events: auto;
}

.project-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
}

.project-modal-container {
    position: relative;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    background: var(--surface);
    color: var(--text);
    border-radius: 0.8rem;
    z-index: 1001;
    transform: translateY(20px);
    transition: transform 0.3s cubic-bezier(0.25, 1, 0.5, 1);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border);
}

.project-modal.is-active .project-modal-container {
    transform: translateY(0);
}

.project-modal-close {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    background: rgba(0, 0, 0, 0.6);
    color: #ffffff;
    border: none;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    font-size: 1.25rem;
    line-height: 2rem;
    text-align: center;
    cursor: pointer;
    z-index: 1002;
    transition: background-color 0.2s ease, transform 0.2s ease;
}

.project-modal-close:hover {
    background: rgba(0, 0, 0, 0.85);
    transform: scale(1.05);
}

.project-modal-hero {
    width: 100%;
    height: 250px;
    overflow: hidden;
}

.project-modal-hero img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.project-modal-body {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.project-modal-body h2 {
    font-size: 1.4rem;
    font-weight: 800;
    margin: 0;
}

.modal-tags {
    display: flex;
    gap: 0.4rem;
}

.modal-tags .project-tag {
    background: var(--link-chip-bg);
    color: var(--text);
    border: 1px solid var(--link-chip-border);
}

.project-modal-body p {
    font-size: 0.88rem;
    color: var(--text-soft);
    line-height: 1.55;
    margin: 0;
}

.modal-tech-stack h4 {
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
    color: var(--text-muted);
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.tech-badge {
    font-size: 0.72rem;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 500;
    padding: 0.18rem 0.45rem;
    background: var(--surface-soft);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-soft);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    margin-top: 0.6rem;
}

/* Theme adaptation */
html[data-theme='dark'] .project-card-featured {
    border-color: var(--border);
}

/* Theme Toggle Button */
.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: var(--surface);
    color: var(--text);
    border-radius: 50%;
    width: 2.1rem;
    height: 2.1rem;
    padding: 0;
    cursor: pointer;
    transition: background-color 0.5s ease, transform 0.5s ease;
}

.theme-toggle:hover {
    background: var(--toggle-hover);
    transform: translateY(-1px);
}

.theme-toggle-icon {
    width: 1rem;
    height: 1rem;
    display: inline-block;
    position: relative;
}

.theme-toggle-icon svg {
    width: 100%;
    height: 100%;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    position: absolute;
    top: 0;
    left: 0;
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.theme-icon-sun {
    opacity: 1;
    transform: rotate(0deg);
}

.theme-icon-moon {
    opacity: 0;
    transform: rotate(-90deg);
}

html[data-theme='dark'] .theme-icon-sun {
    opacity: 0;
    transform: rotate(90deg);
}

html[data-theme='dark'] .theme-icon-moon {
    opacity: 1;
    transform: rotate(0deg);
}

/* Responsive Breakpoints */
@media (max-width: 820px) {
    body {
        padding: 1rem 0.95rem 1.4rem;
    }

    .page-wrap {
        max-width: 100%;
    }

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

@media (max-width: 700px) {
    .back-home {
        font-size: 0.83rem;
    }

    .theme-toggle {
        width: 2rem;
        height: 2rem;
    }

    .stack-title {
        font-size: 1.3rem;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 520px) {
    body {
        padding: 0.9rem 0.78rem 1.2rem;
    }

    .page-head {
        gap: 0.55rem;
    }

    .stack-title {
        font-size: 1.15rem;
    }
}