/* =========================================================
   CyberSecPlayground - UI Components v3.2
   ========================================================= */

/* =========================================================
   SITE HEADER
   ========================================================= */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(13, 17, 23, 0.82);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border-subtle);
    transition: box-shadow var(--dur-base), background var(--dur-base);
}
[data-theme="light"] .site-header { background: rgba(255, 255, 255, 0.85); }

.site-header.scrolled {
    background: rgba(13, 17, 23, 0.95);
    box-shadow: var(--shadow-md);
}
[data-theme="light"] .site-header.scrolled { background: rgba(255, 255, 255, 0.95); }

.site-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    height: var(--header-h);
}
/* =========================================================
   SECTIONS (tighter, more intentional spacing)
   ========================================================= */
.section {
    padding: clamp(2rem, 4vw, 3.5rem) 0;
    position: relative;
}
.section + .section {
    border-top: 1px solid var(--border-subtle);
}
.section-alt {
    background: var(--bg-0);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto clamp(1.5rem, 3vw, 2.25rem);
    padding-inline: 0.5rem;
}
.section-eyebrow {
    display: inline-block;
    font-size: var(--fs-2xs);
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.6rem;
    padding: 0.28rem 0.8rem;
    background: var(--accent-soft);
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-full);
}
.section-title {
    font-size: var(--fs-h2);
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}
.section-title .accent {
    background: var(--grad-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.section-description {
    color: var(--text-tertiary);
    font-size: var(--fs-small);
    line-height: 1.65;
    max-width: 620px;
    margin-inline: auto;
}
.site-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 800;
    font-size: 1.05rem;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    text-decoration: none;
    flex-shrink: 0;
}
.site-brand:hover { color: var(--text-primary); text-decoration: none; }
.brand-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    background: var(--accent-soft);
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: transform var(--dur-base) var(--ease-spring);
    flex-shrink: 0;
}
.site-brand:hover .brand-icon { transform: rotate(-10deg) scale(1.08); }
.brand-accent {
    background: var(--grad-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}
.nav-links a {
    display: block;
    padding: 0.5rem 0.85rem;
    font-size: var(--fs-small);
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--dur-fast) var(--ease-smooth);
    position: relative;
}
.nav-links a:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
    text-decoration: none;
}
.nav-links a.active {
    color: var(--accent);
    background: var(--accent-soft);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.theme-toggle,
.nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-md);
    color: var(--text-primary);
    background: var(--bg-3);
    border: 1px solid var(--border-subtle);
    font-size: 1rem;
    transition: all var(--dur-fast) var(--ease-smooth);
    flex-shrink: 0;
}
.theme-toggle:hover,
.nav-toggle:hover {
    background: var(--bg-hover);
    border-color: var(--border-accent);
}
.theme-toggle:hover { transform: rotate(15deg); }
.nav-toggle { display: none; }
.nav-toggle-icon { font-size: 1.2rem; line-height: 1; }

.nav-cta { display: inline-flex; }

/* Mobile nav */
@media (max-width: 768px) {
    .nav-toggle { display: inline-flex; }
    .nav-cta { display: none; }

    .nav-links {
        position: fixed;
        top: var(--header-h);
        left: 0;
        right: 0;
        bottom: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0.35rem;
        padding: 1.5rem 1rem;
        background: var(--bg-1);
        border-top: 1px solid var(--border-subtle);
        transform: translateX(100%);
        transition: transform var(--dur-slow) var(--ease-out);
        overflow-y: auto;
        z-index: 99;
        visibility: hidden;
    }
    .nav-links.open {
        transform: translateX(0);
        visibility: visible;
    }
    .nav-links a {
        padding: 0.85rem 1rem;
        font-size: 1rem;
        border-radius: var(--radius-md);
    }
    body.menu-open { overflow: hidden; }
}

/* =========================================================
   BUTTONS
   ========================================================= */
.btn {
    --btn-bg: var(--accent);
    --btn-fg: var(--text-inverse);
    --btn-border: transparent;

    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.72rem 1.35rem;
    font-size: var(--fs-small);
    font-weight: 600;
    line-height: 1;
    letter-spacing: -0.01em;
    color: var(--btn-fg);
    background: var(--btn-bg);
    border: 1px solid var(--btn-border);
    border-radius: var(--radius-sm);
    text-decoration: none;
    cursor: pointer;
    white-space: nowrap;
    user-select: none;
    overflow: hidden;
    isolation: isolate;
    transition:
        background var(--dur-fast) var(--ease-smooth),
        color var(--dur-fast) var(--ease-smooth),
        border-color var(--dur-fast) var(--ease-smooth),
        box-shadow var(--dur-base) var(--ease-out),
        transform var(--dur-fast) var(--ease-out);
}

.btn::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: rgba(255, 255, 255, 0.15);
    opacity: 0.6;
    pointer-events: none;
    transition: opacity var(--dur-fast);
}
.btn:hover::before { opacity: 1; }

.btn::after {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%) scaleY(0);
    width: 2px;
    height: 60%;
    background: currentColor;
    opacity: 0.7;
    transition: transform var(--dur-base) var(--ease-out);
}
.btn:hover::after { transform: translateY(-50%) scaleY(1); }

.btn:active { transform: translateY(1px); }
.btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.btn .btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1em;
    line-height: 1;
    opacity: 0.9;
    transition: opacity var(--dur-fast), transform var(--dur-fast);
}
.btn:hover .btn-icon { opacity: 1; transform: translateX(-1px); }

/* Variants */
.btn-primary {
    --btn-bg: var(--accent);
    --btn-fg: #0a0d12;
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.1) inset, 0 1px 2px rgba(0, 0, 0, 0.3);
}
.btn-primary:hover {
    --btn-bg: var(--accent-hover);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.15) inset, 0 4px 12px var(--accent-glow);
    text-decoration: none;
}

.btn-telegram {
    --btn-bg: var(--telegram);
    --btn-fg: #ffffff;
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.12) inset, 0 1px 2px rgba(0, 0, 0, 0.3);
}
.btn-telegram:hover {
    --btn-bg: var(--telegram-hover);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.15) inset, 0 4px 12px rgba(34, 158, 217, 0.35);
    text-decoration: none;
}

.btn-secondary {
    --btn-bg: var(--secondary);
    --btn-fg: #0a0d12;
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.1) inset, 0 1px 2px rgba(0, 0, 0, 0.3);
}
.btn-secondary:hover {
    --btn-bg: var(--secondary-hover);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.15) inset, 0 4px 12px var(--secondary-glow);
    text-decoration: none;
}

.btn-outline {
    --btn-bg: transparent;
    --btn-fg: var(--text-secondary);
    --btn-border: var(--border-default);
    padding: calc(0.72rem - 1px) calc(1.35rem - 1px);
}
.btn-outline:hover {
    --btn-bg: var(--bg-hover);
    --btn-fg: var(--text-primary);
    --btn-border: var(--border-strong);
    text-decoration: none;
}
.btn-outline::before { background: transparent; }
.btn-outline::after { background: var(--accent); }

.btn-ghost {
    --btn-bg: transparent;
    --btn-fg: var(--text-secondary);
    --btn-border: transparent;
    padding: 0.5rem 0.9rem;
}
.btn-ghost::before,
.btn-ghost::after { display: none; }
.btn-ghost:hover {
    --btn-bg: var(--bg-hover);
    --btn-fg: var(--text-primary);
    text-decoration: none;
}

/* Sizes */
.btn-lg {
    padding: 0.9rem 1.75rem;
    font-size: var(--fs-body);
    border-radius: var(--radius-md);
    gap: 0.6rem;
}
.btn-lg.btn-outline {
    padding: calc(0.9rem - 1px) calc(1.75rem - 1px);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: var(--fs-xs);
    border-radius: var(--radius-sm);
    gap: 0.4rem;
}
.btn-sm.btn-outline {
    padding: calc(0.5rem - 1px) calc(1rem - 1px);
}

/* =========================================================
   CARDS
   ========================================================= */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
    gap: clamp(1rem, 2vw, 1.5rem);
}

.card {
    position: relative;
    padding: clamp(1.15rem, 2vw, 1.5rem);
    background: var(--bg-3);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    transition:
        transform var(--dur-base) var(--ease-out),
        border-color var(--dur-base),
        box-shadow var(--dur-base);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
    min-width: 0;
}
.card::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: var(--grad-card-border);
    mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--dur-base);
    pointer-events: none;
}
.card:hover {
    transform: translateY(-4px);
    border-color: transparent;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}
.card:hover::before { opacity: 1; }

.card-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    margin-bottom: 0.75rem;
    background: var(--accent-soft);
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-md);
    font-size: 1.25rem;
    transition: transform var(--dur-base) var(--ease-spring);
}
.card:hover .card-icon { transform: scale(1.08) rotate(-3deg); }

.card-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
    color: var(--text-primary);
    letter-spacing: -0.015em;
}
.card-description {
    color: var(--text-tertiary);
    font-size: var(--fs-small);
    line-height: 1.55;
    margin-bottom: 0.85rem;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.card-footer {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.4rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-subtle);
    font-size: var(--fs-xs);
    color: var(--text-tertiary);
}
.card-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-weight: 600;
    font-size: var(--fs-small);
    color: var(--accent);
    padding: 0.2rem 0;
    transition: color var(--dur-fast);
    align-self: flex-start;
}
.card-link::after {
    content: "→";
    display: inline-block;
    transition: transform var(--dur-base) var(--ease-out);
    opacity: 0.85;
}
.card-link::before {
    content: "";
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 0;
    height: 1px;
    background: currentColor;
    transition: width var(--dur-base) var(--ease-out);
}
.card-link:hover { color: var(--accent-hover); text-decoration: none; }
.card-link:hover::after { transform: translateX(4px); opacity: 1; }
.card-link:hover::before { width: calc(100% - 1.2em); }

/* Card trail */
.card-trail { position: relative; }
.card-trail::after {
    content: "";
    position: absolute;
    inset: -1px;
    border-radius: inherit;
    padding: 1px;
    background: conic-gradient(
        from var(--angle, 0deg),
        transparent 0%,
        transparent 78%,
        var(--accent) 90%,
        transparent 100%
    );
    mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.35s;
    pointer-events: none;
}
.card-trail:hover::after {
    opacity: 1;
    animation: rotateBorder 4s linear infinite;
}
@property --angle {
    syntax: '<angle>';
    initial-value: 0deg;
    inherits: false;
}
@keyframes rotateBorder { to { --angle: 360deg; } }

/* =========================================================
   TELEGRAM CTA
   ========================================================= */
.telegram-cta {
    position: relative;
    max-width: 680px;
    margin: 0 auto;
    padding: clamp(1.75rem, 4vw, 3rem) clamp(1.25rem, 3vw, 2rem);
    background: linear-gradient(135deg, rgba(34, 158, 217, 0.15), var(--bg-3));
    border: 1px solid rgba(34, 158, 217, 0.35);
    border-radius: var(--radius-xl);
    text-align: center;
    overflow: hidden;
}
.telegram-cta::before {
    content: "";
    position: absolute;
    top: -50%; left: -50%;
    width: 200%; height: 200%;
    background: conic-gradient(from 0deg, transparent, rgba(34, 158, 217, 0.1), transparent);
    animation: rotate 8s linear infinite;
    pointer-events: none;
}
.telegram-cta > * { position: relative; z-index: 1; }
.tg-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 3.5rem;
    height: 3.5rem;
    font-size: 1.75rem;
    background: var(--grad-telegram);
    border-radius: var(--radius-xl);
    margin-bottom: 1rem;
    box-shadow: 0 8px 24px rgba(34, 158, 217, 0.4);
}
.telegram-cta h3 { font-size: var(--fs-h3); margin-bottom: 0.6rem; }
.telegram-cta p {
    color: var(--text-tertiary);
    margin-bottom: 1.25rem;
    max-width: 480px;
    margin-inline: auto;
    font-size: var(--fs-small);
    line-height: 1.7;
}
.channel-list {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: 1.25rem;
    font-size: var(--fs-2xs);
}
.channel-list span {
    padding: 0.25rem 0.7rem;
    background: var(--bg-4);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    color: var(--text-tertiary);
    font-family: var(--font-mono);
    white-space: nowrap;
}

/* =========================================================
   MEDIUM CTA
   ========================================================= */
.medium-cta {
    position: relative;
    max-width: 820px;
    margin: 0 auto;
    padding: clamp(1.5rem, 4vw, 3rem);
    background:
        radial-gradient(circle at 15% 20%, rgba(88, 166, 255, 0.08), transparent 50%),
        radial-gradient(circle at 85% 80%, rgba(240, 180, 41, 0.06), transparent 50%),
        linear-gradient(135deg, var(--bg-3), var(--bg-2));
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    overflow: hidden;
}
.medium-cta::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--grad-text);
    opacity: 0.8;
}
.medium-cta-content {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: clamp(1rem, 3vw, 1.75rem);
    align-items: center;
    position: relative;
}
.medium-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: clamp(3.5rem, 8vw, 5rem);
    height: clamp(3.5rem, 8vw, 5rem);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    background: var(--bg-1);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
}
.medium-icon::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--accent-soft), transparent);
    opacity: 0.6;
}
.medium-icon span { position: relative; }

.medium-text { min-width: 0; }
.medium-eyebrow {
    display: inline-block;
    font-size: var(--fs-2xs);
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.5rem;
}
.medium-cta h3 {
    font-size: clamp(1.3rem, 2.5vw, 1.75rem);
    margin-bottom: 0.6rem;
    letter-spacing: -0.02em;
}
.medium-cta p {
    color: var(--text-tertiary);
    font-size: var(--fs-small);
    line-height: 1.7;
    margin-bottom: 1.1rem;
    max-width: 520px;
}
.medium-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 0.9rem;
}
.medium-note {
    font-size: var(--fs-2xs) !important;
    color: var(--text-muted) !important;
    margin-bottom: 0 !important;
}

@media (max-width: 700px) {
    .medium-cta-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .medium-text { text-align: center; }
    .medium-icon { margin: 0 auto; }
    .medium-actions { justify-content: center; }
    .medium-actions .btn { flex: 1; min-width: 180px; }
    .medium-cta p { margin-inline: auto; }
}

@media (max-width: 480px) {
    .medium-actions .btn { flex: 1 1 100%; }
}

/* =========================================================
   TOASTS
   ========================================================= */
.toast-container {
    position: fixed;
    top: calc(var(--header-h) + 1rem);
    right: 1rem;
    left: auto;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    z-index: 200;
    pointer-events: none;
    max-width: calc(100vw - 2rem);
}
.toast {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.85rem 1.1rem;
    min-width: 260px;
    background: var(--bg-3);
    border: 1px solid var(--border-default);
    border-left: 3px solid var(--accent);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    color: var(--text-primary);
    font-size: var(--fs-small);
    pointer-events: auto;
    animation: toastIn 0.35s var(--ease-spring);
}
.toast.toast-success { border-left-color: var(--success); }
.toast.toast-error { border-left-color: var(--danger); }
.toast.toast-warning { border-left-color: var(--warning); }
.toast.removing { animation: toastOut 0.25s var(--ease-out) forwards; }

@keyframes toastIn {
    from { opacity: 0; transform: translateX(100%) scale(0.95); }
    to { opacity: 1; transform: translateX(0) scale(1); }
}
@keyframes toastOut {
    to { opacity: 0; transform: translateX(100%) scale(0.95); }
}

@media (max-width: 480px) {
    .toast-container {
        left: 1rem;
        right: 1rem;
    }
    .toast { min-width: 0; width: 100%; }
}

/* =========================================================
   BACK TO TOP
   ========================================================= */
.back-to-top {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    width: 2.75rem;
    height: 2.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    color: var(--text-inverse);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-accent);
    font-size: 1.15rem;
    font-weight: 700;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(16px);
    transition: all var(--dur-base) var(--ease-out);
    z-index: 90;
}
.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.back-to-top:hover {
    background: var(--accent-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 32px var(--accent-glow);
}
.back-to-top:active { transform: translateY(-2px) scale(0.96); }

@media (max-width: 480px) {
    .back-to-top { bottom: 1rem; right: 1rem; width: 2.5rem; height: 2.5rem; }
}

/* =========================================================
   FOOTER
   ========================================================= */
.site-footer {
    position: relative;
    padding: clamp(2.5rem, 6vw, 5rem) 0 1.5rem;
    background: linear-gradient(180deg, var(--bg-0) 0%, #040608 100%);
    border-top: 1px solid var(--border-subtle);
    overflow: hidden;
}
.site-footer::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0.4;
}
.site-footer::after {
    content: "";
    position: absolute;
    bottom: -100px; left: 50%;
    transform: translateX(-50%);
    width: min(600px, 80vw);
    height: 200px;
    background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 70%);
    opacity: 0.15;
    filter: blur(40px);
    pointer-events: none;
}
.site-footer .container { position: relative; z-index: 1; }

.footer-top {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: clamp(1.5rem, 4vw, 2.5rem);
    align-items: start;
    padding-bottom: 2.5rem;
    border-bottom: 1px solid var(--border-subtle);
    margin-bottom: 2rem;
}
.footer-brand-col { max-width: 400px; min-width: 0; }
.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.3rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}
.footer-brand .accent {
    background: var(--grad-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.footer-tagline {
    color: var(--text-muted);
    font-size: var(--fs-small);
    line-height: 1.7;
    margin-bottom: 1.25rem;
}
.footer-socials {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.footer-social {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    font-size: 1.05rem;
    background: var(--bg-3);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    transition: all var(--dur-base) var(--ease-out);
    text-decoration: none;
}
.footer-social:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px var(--accent-glow);
    text-decoration: none;
}

.footer-nav-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(120px, 1fr));
    gap: clamp(1.5rem, 3vw, 2.5rem);
}
.footer-col h4 {
    font-size: var(--fs-2xs);
    font-weight: 700;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.9rem;
}
.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
}
.footer-col a {
    font-size: var(--fs-small);
    color: var(--text-muted);
    transition: all var(--dur-fast);
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}
.footer-col a::before {
    content: "→";
    opacity: 0;
    transform: translateX(-4px);
    transition: all var(--dur-fast);
    color: var(--accent);
    font-size: 0.9em;
}
.footer-col a:hover { color: var(--accent); text-decoration: none; }
.footer-col a:hover::before { opacity: 1; transform: translateX(0); }

.footer-bottom {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding-top: 1.5rem;
}
.footer-copy {
    font-size: var(--fs-xs);
    color: var(--text-muted);
    line-height: 1.7;
}
.footer-copy .accent { color: var(--accent); font-weight: 600; }
.footer-copy em { opacity: 0.7; font-style: italic; }

.footer-meta {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    font-size: var(--fs-2xs);
    color: var(--text-muted);
    flex-wrap: wrap;
}
.footer-meta .status {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.7rem;
    background: var(--success-soft);
    border: 1px solid rgba(63, 185, 80, 0.25);
    border-radius: var(--radius-full);
    color: var(--success);
    font-weight: 600;
    white-space: nowrap;
}
.footer-meta .status::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--success);
    box-shadow: 0 0 6px var(--success);
    animation: pulse 2s infinite;
    flex-shrink: 0;
}

@media (max-width: 900px) {
    .footer-top {
        grid-template-columns: 1fr;
    }
    .footer-nav-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}
@media (max-width: 640px) {
    .footer-nav-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    .footer-meta { justify-content: center; }
}
@media (max-width: 400px) {
    .footer-nav-grid {
        grid-template-columns: 1fr;
    }
}