/*
  ========================================
  SEÇÃO DE PROJETOS - CSS PREMIUM 2026
  ========================================

  Design system moderno com:
  - CSS Variables para tokens de design
  - Tipografia responsiva com clamp()
  - Microinterações suaves
  - Acessibilidade completa
  - Performance otimizada
  - Dark mode ready
*/

/* ==================== CSS VARIABLES ==================== */
:root {
    /* Colors */
    --proj-bg: #0f1419;
    --proj-surface: rgba(255, 255, 255, 0.03);
    --proj-surface-hover: rgba(255, 255, 255, 0.06);
    --proj-border: rgba(255, 255, 255, 0.08);
    --proj-border-hover: rgba(124, 58, 237, 0.4);

    --proj-text: #e5e7eb;
    --proj-text-secondary: #9ca3af;
    --proj-text-muted: #6b7280;

    --proj-primary: #2563eb;
    --proj-primary-hover: #3b82f6;
    --proj-secondary: #7c3aed;
    --proj-accent: #ec4899;

    /* Shadows */
    --proj-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --proj-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --proj-shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.2);
    --proj-shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
    --proj-shadow-glow: 0 0 30px rgba(124, 58, 237, 0.2);

    /* Spacing */
    --proj-spacing-xs: 0.5rem;
    --proj-spacing-sm: 0.75rem;
    --proj-spacing-md: 1rem;
    --proj-spacing-lg: 1.5rem;
    --proj-spacing-xl: 2rem;
    --proj-spacing-2xl: 3rem;

    /* Border Radius */
    --proj-radius-sm: 0.375rem;
    --proj-radius: 0.5rem;
    --proj-radius-md: 0.75rem;
    --proj-radius-lg: 1rem;
    --proj-radius-full: 9999px;

    /* Transitions */
    --proj-transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --proj-transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --proj-transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==================== SECTION BASE ==================== */
.projetos {
    padding: clamp(4rem, 10vw, 8rem) 0;
    position: relative;
    background: var(--proj-bg);
    overflow: hidden;
}

/* Subtle background effect */
.projetos::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 1400px;
    height: 100%;
    background: radial-gradient(circle at 50% 0%, rgba(124, 58, 237, 0.08), transparent 60%);
    pointer-events: none;
    z-index: 0;
}

.projetos .container {
    position: relative;
    z-index: 1;
}

/* ==================== HEADER ==================== */
.projetos-header {
    text-align: center;
    margin-bottom: clamp(3rem, 6vw, 5rem);
}

.projetos-title {
    font-size: clamp(2.25rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--proj-spacing-md);
    letter-spacing: -0.02em;
}

.projetos-title-accent {
    background: linear-gradient(135deg, var(--proj-primary), var(--proj-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.projetos-subtitle {
    font-size: clamp(1rem, 2vw, 1.125rem);
    color: var(--proj-text-secondary);
    max-width: 48rem;
    margin: 0 auto;
    line-height: 1.6;
}

/* ==================== SEARCH ==================== */
.projetos-search {
    margin-bottom: var(--proj-spacing-2xl);
    display: flex;
    justify-content: center;
}

.search-wrapper {
    position: relative;
    width: 100%;
    max-width: 32rem;
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--proj-text-muted);
    pointer-events: none;
    transition: color var(--proj-transition);
}

.search-input {
    width: 100%;
    padding: 0.875rem 1rem 0.875rem 3rem;
    background: var(--proj-surface);
    border: 1px solid var(--proj-border);
    border-radius: var(--proj-radius-full);
    color: var(--proj-text);
    font-size: 1rem;
    font-family: inherit;
    transition: all var(--proj-transition);
    outline: none;
}

.search-input::placeholder {
    color: var(--proj-text-muted);
}

.search-input:focus {
    background: var(--proj-surface-hover);
    border-color: var(--proj-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-input:focus+.search-icon,
.search-input:not(:placeholder-shown)+.search-icon {
    color: var(--proj-primary);
}

/* ==================== FILTER ==================== */
.stacks-filter {
    display: flex;
    flex-wrap: wrap;
    gap: var(--proj-spacing-sm);
    justify-content: center;
    margin-bottom: var(--proj-spacing-2xl);
    padding: var(--proj-spacing-sm);
    background: var(--proj-surface);
    border: 1px solid var(--proj-border);
    border-radius: var(--proj-radius-full);
    max-width: max-content;
    margin-left: auto;
    margin-right: auto;
}

.stack-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--proj-radius-full);
    color: var(--proj-text-secondary);
    font-size: 0.9375rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--proj-transition);
    position: relative;
    white-space: nowrap;
}

.stack-btn:hover:not(.active) {
    background: var(--proj-surface-hover);
    color: var(--proj-text);
    transform: translateY(-1px);
}

.stack-btn.active {
    background: linear-gradient(135deg, var(--proj-primary), var(--proj-secondary));
    color: #ffffff;
    border-color: transparent;
    box-shadow: var(--proj-shadow), var(--proj-shadow-glow);
}

.stack-btn:focus-visible {
    outline: 2px solid var(--proj-primary);
    outline-offset: 2px;
}

.stack-btn i {
    font-size: 1rem;
}

/* Keyboard navigation */
.stack-btn:focus-visible:not(.active) {
    background: var(--proj-surface-hover);
    border-color: var(--proj-primary);
}

/* ==================== GRID ==================== */
.projetos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 380px), 1fr));
    gap: clamp(1.5rem, 3vw, 2rem);
    margin-bottom: var(--proj-spacing-2xl);
}

/* ==================== PROJECT CARD ==================== */
.project-card {
    display: flex;
    flex-direction: column;
    background: var(--proj-surface);
    border: 1px solid var(--proj-border);
    border-radius: var(--proj-radius-lg);
    overflow: hidden;
    transition: all var(--proj-transition-slow);
    position: relative;
    height: 100%;
    min-height: 520px;
}

.project-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: linear-gradient(135deg, transparent, rgba(124, 58, 237, 0.2), transparent);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--proj-transition-slow);
    pointer-events: none;
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--proj-border-hover);
    box-shadow: var(--proj-shadow-lg), var(--proj-shadow-glow);
}

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

/* Focus state for keyboard navigation */
.project-card:focus-within {
    border-color: var(--proj-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* ==================== PROJECT IMAGE ==================== */
.project-image {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(124, 58, 237, 0.1));
    flex-shrink: 0;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--proj-transition-slow);
}

.project-card:hover .project-image img {
    transform: scale(1.03);
}

.project-image-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom,
            transparent 0%,
            transparent 50%,
            rgba(15, 20, 25, 0.4) 100%);
    pointer-events: none;
}

/* ==================== PROJECT CONTENT ==================== */
.project-content {
    display: flex;
    flex-direction: column;
    padding: clamp(1.25rem, 3vw, 1.75rem);
    flex: 1;
    gap: var(--proj-spacing-md);
}

.project-title {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    font-weight: 600;
    line-height: 1.3;
    color: var(--proj-text);
    margin: 0;
    letter-spacing: -0.01em;
}

.project-description {
    font-size: clamp(0.9375rem, 1.5vw, 1rem);
    line-height: 1.6;
    color: var(--proj-text-secondary);
    margin: 0;
    flex: 1;
}

/* ==================== PROJECT TAGS ==================== */
.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: auto;
}

.project-tag {
    display: inline-flex;
    align-items: center;
    padding: 0.375rem 0.75rem;
    background: rgba(124, 58, 237, 0.1);
    border: 1px solid rgba(124, 58, 237, 0.2);
    border-radius: var(--proj-radius-sm);
    color: var(--proj-primary);
    font-size: 0.8125rem;
    font-weight: 500;
    transition: all var(--proj-transition);
}

.project-tag:hover {
    background: rgba(124, 58, 237, 0.15);
    border-color: rgba(124, 58, 237, 0.3);
    transform: translateY(-1px);
}

/* ==================== PROJECT ACTIONS ==================== */
.project-actions {
    display: flex;
    gap: var(--proj-spacing-sm);
    margin-top: var(--proj-spacing-sm);
}

.btn-project {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    border-radius: var(--proj-radius);
    font-size: 0.9375rem;
    font-weight: 500;
    font-family: inherit;
    text-decoration: none;
    transition: all var(--proj-transition);
    flex: 1;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn-project::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transform: translateX(-100%);
    transition: transform var(--proj-transition-slow);
}

.btn-project:hover::before {
    transform: translateX(100%);
}

.btn-project-primary {
    background: linear-gradient(135deg, var(--proj-primary), var(--proj-secondary));
    color: #ffffff;
    border: 1px solid transparent;
}

.btn-project-primary:hover {
    box-shadow: var(--proj-shadow), 0 0 20px rgba(37, 99, 235, 0.3);
    transform: translateY(-2px);
}

.btn-project-secondary {
    background: transparent;
    color: var(--proj-text);
    border: 1px solid var(--proj-border);
}

.btn-project-secondary:hover {
    background: var(--proj-surface-hover);
    border-color: var(--proj-primary);
    color: var(--proj-primary);
    transform: translateY(-2px);
}

.btn-project:focus-visible {
    outline: 2px solid var(--proj-primary);
    outline-offset: 2px;
}

.btn-project i {
    font-size: 1rem;
    transition: transform var(--proj-transition);
}

.btn-project:hover i {
    transform: scale(1.1);
}

/* ==================== EMPTY STATE ==================== */
.projetos-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: clamp(3rem, 8vw, 6rem) var(--proj-spacing-lg);
    text-align: center;
}

.projetos-empty[hidden] {
    display: none;
}

.projetos-empty-icon {
    width: clamp(3rem, 8vw, 4rem);
    height: clamp(3rem, 8vw, 4rem);
    color: var(--proj-text-muted);
    margin-bottom: var(--proj-spacing-lg);
    opacity: 0.5;
}

.projetos-empty-text {
    font-size: clamp(1.125rem, 2vw, 1.25rem);
    font-weight: 600;
    color: var(--proj-text);
    margin-bottom: var(--proj-spacing-sm);
}

.projetos-empty-hint {
    font-size: clamp(0.9375rem, 1.5vw, 1rem);
    color: var(--proj-text-secondary);
}

/* ==================== ANIMATIONS ==================== */
.project-card {
    animation: fadeInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1) backwards;
}

.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:nth-child(5) {
    animation-delay: 0.25s;
}

.project-card:nth-child(6) {
    animation-delay: 0.3s;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Filter transition */
.project-card.filtering-out {
    animation: filterOut 0.3s cubic-bezier(0.4, 0, 1, 1) forwards;
}

.project-card.filtering-in {
    animation: filterIn 0.4s cubic-bezier(0, 0, 0.2, 1) forwards;
}

@keyframes filterOut {
    to {
        opacity: 0;
        transform: scale(0.9);
    }
}

@keyframes filterIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
    .stacks-filter {
        max-width: 100%;
        background: transparent;
        border: none;
        padding: 0;
        gap: var(--proj-spacing-xs);
    }

    .stack-btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
        flex: 0 1 auto;
    }

    .project-actions {
        flex-direction: column;
    }

    .btn-project {
        width: 100%;
    }

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

@media (max-width: 480px) {
    .projetos {
        padding: clamp(3rem, 8vw, 4rem) 0;
    }

    .stacks-filter {
        gap: 0.375rem;
    }

    .stack-btn {
        padding: 0.5rem 0.875rem;
        font-size: 0.8125rem;
    }

    .stack-btn span {
        display: none;
    }

    .stack-btn[data-stack="all"] span {
        display: inline;
    }

    .stack-btn i {
        margin: 0;
    }

    .project-card {
        min-height: 480px;
    }
}

/* ==================== ACCESSIBILITY ==================== */
/* Reduced motion */
@media (prefers-reduced-motion: reduce) {

    .project-card,
    .btn-project,
    .stack-btn,
    .search-input,
    .project-image img {
        animation: none;
        transition: none;
    }

    .project-card:hover {
        transform: none;
    }

    .btn-project:hover,
    .stack-btn:hover {
        transform: none;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    .project-card {
        border-width: 2px;
    }

    .btn-project {
        border-width: 2px;
    }

    .stack-btn.active {
        outline: 2px solid currentColor;
        outline-offset: 2px;
    }
}

/* Focus visible enhancement */
@supports selector(:focus-visible) {
    .stack-btn:focus {
        outline: none;
    }

    .btn-project:focus {
        outline: none;
    }
}

/* ==================== PRINT STYLES ==================== */
@media print {
    .projetos {
        padding: 2rem 0;
    }

    .projetos-search,
    .stacks-filter {
        display: none;
    }

    .project-card {
        break-inside: avoid;
        page-break-inside: avoid;
    }

    .btn-project::after {
        content: " (" attr(href) ")";
        font-size: 0.75rem;
    }
}

/* Garantir que [hidden] sempre suma (evita override acidental) */
.project-card[hidden],
.skill-card[hidden],
.projetos-empty[hidden] {
    display: none !important;
}