/* ============================================
   PORTFOLIO — COMPONENTS
   Nav, Footer, Buttons, Tags, Back-to-top
   ============================================ */

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 1000;
    transition: all var(--transition-base);
}

.nav.scrolled {
    background: rgba(250, 248, 245, 0.9);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--card-border);
    box-shadow: 0 1px 8px var(--card-shadow);
}

[data-theme="dark"] .nav.scrolled {
    background: rgba(26, 18, 11, 0.9);
}

.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-xl);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--text-dark);
    transition: color var(--transition-fast);
}

.nav-logo:hover { color: var(--accent); }

.nav-logo-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
    font-size: 0.75rem;
    font-weight: 700;
    color: white;
    letter-spacing: 0.05em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2px;
}

.nav-link {
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text-muted);
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    text-decoration: none;
    position: relative;
}

.nav-link:hover {
    color: var(--text-dark);
    background: var(--accent-lighter);
}

.nav-link.active {
    color: var(--accent);
    font-weight: 600;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) scaleX(1);
    width: 18px;
    height: 2px;
    background: var(--accent);
    border-radius: var(--radius-full);
    animation: navUnderline 0.3s ease;
}

@keyframes navUnderline {
    from { transform: translateX(-50%) scaleX(0); }
    to { transform: translateX(-50%) scaleX(1); }
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.82rem;
    font-weight: 600;
    color: white;
    padding: 9px 18px;
    background: var(--accent);
    border-radius: var(--radius-full);
    text-decoration: none;
    transition: all var(--transition-base);
    box-shadow: 0 2px 10px rgba(161, 92, 56, 0.2);
    margin-left: var(--space-md);
}

.nav-cta:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(161, 92, 56, 0.3);
    color: white;
}

.nav-cta i { font-size: 0.75rem; }

/* Theme Toggle */
.theme-toggle {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: var(--accent-lighter);
    border: 1px solid var(--card-border);
    color: var(--text-muted);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-base);
    margin-left: var(--space-sm);
}

.theme-toggle:hover {
    background: var(--accent-light);
    border-color: var(--card-border-hover);
    color: var(--accent);
    transform: translateY(-1px);
}

.theme-toggle .fa-sun { display: none; }
.theme-toggle .fa-moon { display: block; }

[data-theme="dark"] .theme-toggle .fa-sun { display: block; }
[data-theme="dark"] .theme-toggle .fa-moon { display: none; }

/* Language Toggle */
.lang-toggle {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: var(--accent-lighter);
    border: 1px solid var(--card-border);
    color: var(--text-muted);
    font-size: 1.1rem;
    cursor: pointer;
    transition: all var(--transition-base);
    margin-left: var(--space-xs);
    padding: 0;
}

.lang-toggle:hover {
    background: var(--accent-light);
    border-color: var(--card-border-hover);
    transform: translateY(-1px);
}

.lang-flag { line-height: 1; }

/* Mobile Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-sm);
    z-index: 1001;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-dark);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile Menu */
.nav-mobile {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(250, 248, 245, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 999;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
}

[data-theme="dark"] .nav-mobile {
    background: rgba(26, 18, 11, 0.97);
}

.nav-mobile.active { display: flex; }

.nav-mobile .nav-link {
    font-size: 1.2rem;
    font-weight: 600;
    padding: var(--space-md) var(--space-xl);
}

.nav-mobile .nav-cta {
    margin-left: 0;
    margin-top: var(--space-lg);
    font-size: 1rem;
    padding: 14px 30px;
}

/* --- Footer --- */
.footer {
    border-top: 1px solid var(--card-border);
    padding: var(--space-3xl) 0 var(--space-xl);
    position: relative;
    z-index: 1;
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-lg);
}

.footer-left {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.footer-logo {
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
    font-family: var(--font-heading);
    font-size: 0.65rem;
    font-weight: 700;
    color: white;
}

.footer-copy {
    font-size: 0.82rem;
    color: var(--text-muted);
}

.footer-social {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.footer-social a {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: var(--accent-lighter);
    border: 1px solid var(--card-border);
    color: var(--text-muted);
    font-size: 0.85rem;
    transition: all var(--transition-base);
    text-decoration: none;
}

.footer-social a:hover {
    background: var(--accent-light);
    border-color: var(--card-border-hover);
    color: var(--accent);
    transform: translateY(-2px);
}

/* --- Buttons (magnetic) --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.92rem;
    padding: 13px 26px;
    border-radius: var(--radius-full);
    text-decoration: none;
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    position: relative;
}

.btn-primary {
    color: white;
    background: var(--accent);
    box-shadow: 0 2px 14px rgba(161, 92, 56, 0.2);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 22px rgba(161, 92, 56, 0.3);
    color: white;
}

.btn-secondary {
    color: var(--text-dark);
    background: transparent;
    border: 1.5px solid var(--card-border-hover);
}

.btn-secondary:hover {
    background: var(--accent-lighter);
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
}

.btn-sm {
    font-size: 0.82rem;
    padding: 9px 18px;
}

.btn i { font-size: 0.8em; }

/* --- Tags --- */
.tag {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 500;
    padding: 5px 12px;
    background: var(--accent-light);
    border: 1px solid rgba(161, 92, 56, 0.12);
    border-radius: var(--radius-full);
    color: var(--accent);
    transition: all var(--transition-fast);
    letter-spacing: 0.02em;
}

.tag:hover {
    background: rgba(161, 92, 56, 0.15);
    border-color: rgba(161, 92, 56, 0.25);
    transform: translateY(-1px) scale(1.03);
}

/* Skill level tooltip */
.tag[data-level] {
    position: relative;
    cursor: default;
}

.tag[data-level]::after {
    content: 'Niveau : ' attr(data-level);
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    padding: 5px 10px;
    background: var(--bg-main);
    border: 1px solid var(--card-border-hover);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.62rem;
    white-space: nowrap;
    color: var(--accent);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s, transform 0.2s;
    z-index: 10;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.tag[data-level]:hover::after {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 600;
    padding: 7px 16px;
    border-radius: var(--radius-full);
    background: rgba(76, 175, 80, 0.08);
    border: 1px solid rgba(76, 175, 80, 0.2);
    color: #2E7D32;
}

.badge-pulse::before {
    content: '';
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #4CAF50;
    animation: pulse 2s ease-in-out infinite;
}

/* --- Grids --- */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-xl); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-xl); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-lg); }

/* --- Divider --- */
.divider {
    width: 50px;
    height: 3px;
    background: var(--accent);
    border-radius: var(--radius-full);
    margin: var(--space-md) auto;
}

/* --- Back to Top --- */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    color: white;
    border-radius: var(--radius-md);
    font-size: 1rem;
    z-index: 900;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-base);
    box-shadow: 0 4px 16px rgba(161, 92, 56, 0.25);
    cursor: pointer;
    border: none;
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--accent-hover);
    transform: translateY(-3px);
}

/* --- Copy to clipboard button --- */
.copy-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: var(--accent-lighter);
    border: 1px solid var(--card-border);
    color: var(--text-muted);
    font-size: 0.82rem;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    flex-shrink: 0;
    margin-left: auto;
}

.copy-btn:hover {
    background: var(--accent-light);
    border-color: var(--card-border-hover);
    color: var(--accent);
    transform: translateY(-1px);
}

.copy-tooltip {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    background: var(--accent);
    color: white;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    transition: all 0.25s ease;
}

.copy-btn.copied .copy-tooltip {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.copy-btn.copied {
    color: #4CAF50;
    border-color: rgba(76, 175, 80, 0.3);
    background: rgba(76, 175, 80, 0.08);
}