/* Future Node V2 — Components
   Shared navigation, floating menu, footer, cards, buttons, alerts and reusable UI.
*/

/* =========================
   TOP BRAND NAV
========================= */
.main-nav {
    position: fixed;
    inset: 0 0 auto 0;
    min-height: var(--fn-nav-height);
    padding: 20px var(--fn-page-gutter);
    display: flex;
    align-items: center;
    pointer-events: none;
    z-index: var(--fn-z-nav);
}

.main-nav img {
    width: auto;
    height: 64px;
    object-fit: contain;
    pointer-events: auto;
}

/* =========================
   FLOATING NAV
========================= */
#fn-float {
    position: fixed;
    top: 22px;
    right: 30px;
    width: 62px;
    height: 62px;
    padding: 0;
    appearance: none;
    -webkit-appearance: none;
    display: grid;
    place-items: center;
    cursor: pointer;
    z-index: var(--fn-z-float);
    background: var(--fn-surface);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--fn-border);
    border-radius: 50%;
    box-shadow: 0 0 22px rgba(29, 113, 184, 0.23);
    transition:
        transform var(--fn-normal) var(--fn-ease),
        box-shadow var(--fn-normal) var(--fn-ease),
        border-color var(--fn-normal) var(--fn-ease);
}

#fn-float img {
    width: 44px;
    height: 44px;
    object-fit: contain;
}

#fn-float:hover {
    transform: scale(1.06);
    border-color: rgba(29, 113, 184, 0.45);
    box-shadow: 0 0 30px rgba(29, 113, 184, 0.38);
}

#fn-panel {
    position: fixed;
    top: 96px;
    right: 30px;
    width: min(380px, calc(100vw - 40px));
    padding: 20px;
    z-index: var(--fn-z-panel);
    border-radius: var(--fn-radius-lg);
    background: color-mix(in srgb, var(--fn-bg-elevated) 88%, transparent);
    backdrop-filter: blur(26px);
    -webkit-backdrop-filter: blur(26px);
    border: 1px solid var(--fn-border);
    box-shadow: var(--fn-shadow-strong);
    opacity: 0;
    transform: translateY(-14px) scale(0.97);
    transform-origin: top right;
    pointer-events: none;
    visibility: hidden;
    transition:
        opacity var(--fn-normal) var(--fn-ease),
        transform var(--fn-normal) var(--fn-ease),
        visibility var(--fn-normal) var(--fn-ease);
}

#fn-panel.active {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
    visibility: visible;
}

.fn-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.fn-item {
    min-height: 104px;
    padding: 16px 10px;
    border-radius: var(--fn-radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 7px;
    text-decoration: none;
    color: var(--fn-text-muted);
    background: var(--fn-surface-soft);
    border: 1px solid var(--fn-border);
    transition:
        transform var(--fn-normal) var(--fn-ease),
        color var(--fn-normal) var(--fn-ease),
        border-color var(--fn-normal) var(--fn-ease),
        box-shadow var(--fn-normal) var(--fn-ease),
        background var(--fn-normal) var(--fn-ease);
}

.fn-item img {
    width: 42px;
    height: 42px;
    object-fit: contain;
    opacity: 0.92;
}

.fn-item span {
    font-size: 0.76rem;
    letter-spacing: 0.04em;
}

.fn-item-button {
    width: 100%;
    appearance: none;
    -webkit-appearance: none;
    font: inherit;
    cursor: pointer;
}

.fn-theme-glyph {
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    color: var(--fn-text);
    background: var(--fn-surface-strong);
    border: 1px solid var(--fn-border);
    font-size: 1.45rem;
    line-height: 1;
    letter-spacing: 0;
    transition:
        transform var(--fn-normal) var(--fn-ease),
        background var(--fn-normal) var(--fn-ease);
}

.fn-item-button:hover .fn-theme-glyph {
    transform: rotate(12deg) scale(1.06);
}

.fn-item:hover,
.fn-item:focus-visible {
    transform: translateY(-4px);
    color: var(--fn-text);
    border-color: rgba(29, 113, 184, 0.62);
    background: var(--fn-surface);
    box-shadow: 0 0 24px rgba(29, 113, 184, 0.25);
}

/* =========================
   REUSABLE CARDS / BUTTONS
========================= */
.fn-glass {
    background: var(--fn-surface);
    border: 1px solid var(--fn-border);
    border-radius: var(--fn-radius-lg);
    backdrop-filter: blur(var(--fn-blur));
    -webkit-backdrop-filter: blur(var(--fn-blur));
}

.fn-button {
    min-height: 44px;
    padding: 11px 18px;
    border: 1px solid transparent;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-decoration: none;
    cursor: pointer;
    color: #fff;
    background: var(--fn-gradient);
    font-weight: 650;
    transition:
        transform var(--fn-fast) var(--fn-ease),
        box-shadow var(--fn-normal) var(--fn-ease);
}

.fn-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--fn-glow-blue);
}

/* =========================
   ALERTS
========================= */
.success-message,
.error-message {
    margin-bottom: 20px;
    padding: 14px 16px;
    border-radius: 12px;
    font-size: 0.9rem;
}

.success-message {
    color: var(--fn-success);
    background: var(--fn-success-bg);
    border: 1px solid var(--fn-success-border);
}

.error-message {
    color: var(--fn-danger);
    background: var(--fn-danger-bg);
    border: 1px solid var(--fn-danger-border);
}

/* =========================
   FOOTER
========================= */
.fn-footer {
    margin-top: 40px;
    padding: 54px 20px;
    text-align: center;
    border-top: 1px solid var(--fn-border);
    background: var(--fn-surface-soft);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.fn-footer img {
    width: 90px;
    margin-bottom: 14px;
    opacity: 0.92;
}

.fn-footer p {
    margin-bottom: 0;
    color: var(--fn-text-faint);
    font-size: 0.82rem;
    letter-spacing: 0.03em;
}

.fn-footer span {
    background: var(--fn-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

@media (max-width: 768px) {
    .main-nav {
        min-height: 78px;
        padding: 14px var(--fn-page-gutter-mobile);
    }

    .main-nav img {
        height: 48px;
    }

    #fn-float {
        top: 14px;
        right: 15px;
        width: 52px;
        height: 52px;
    }

    #fn-float img {
        width: 39px;
        height: 39px;
    }

    #fn-panel {
        top: 78px;
        right: 15px;
        width: calc(100vw - 30px);
        padding: 16px;
    }

    .fn-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 12px;
    }

    .fn-item {
        min-height: 110px;
        padding: 18px 12px;
    }

    .fn-item img {
        width: 44px;
        height: 44px;
    }

    .fn-footer {
        margin-top: 24px;
        padding: 44px 18px;
    }
}