/* =====================================================
   PrimeHubTools — Main Stylesheet
   Dark neon theme · Mobile-first · AdSense-ready
   ===================================================== */

/* ── 1. CSS Custom Properties ─────────────────────── */
:root {
    /* Background scale */
    --bg-base:        #050505;
    --bg-secondary:   #0B0F19;
    --bg-section:     #0F172A;
    --bg-card:        #111827;
    --bg-card-hover:  #1E293B;

    /* Text */
    --text-primary:   #FFFFFF;
    --text-secondary: #94A3B8;
    --text-muted:     #475569;

    /* Borders */
    --border-dark:    #1F2937;
    --border-subtle:  #243044;

    /* Neon palette — per-category via --cat-color on each element */
    --neon-text:      #00E5FF;   /* Text Tools       */
    --neon-image:     #FFD600;   /* Image Tools      */
    --neon-developer: #39FF14;   /* Developer Tools  */
    --neon-web:       #A855F7;   /* Web Tools        */
    --neon-security:  #FF3131;   /* Security Tools   */
    --neon-default:   #00E5FF;

    /* Favourite star active */
    --star-active:    #FFD600;

    /* Layout */
    --container-max:  1200px;
    --gutter:         clamp(1rem, 4vw, 2rem);
    --radius-sm:      6px;
    --radius-md:      12px;
    --radius-lg:      18px;

    /* Header height (used for scroll-padding) */
    --header-h:       64px;

    /* Transitions */
    --ease:           cubic-bezier(.4, 0, .2, 1);
    --dur:            220ms;
}

/* ── 2. Reset & Base ──────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-h) + 1rem);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
                 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }

ul, ol { list-style: none; }

button { cursor: pointer; font: inherit; border: none; background: none; }

/* Accessibility: visible focus */
:focus-visible {
    outline: 2px solid var(--neon-default);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
    html { scroll-behavior: auto; }
}

/* ── 3. Layout Helpers ────────────────────────────── */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--gutter);
}

/* Reusable section spacing */
.section-header {
    text-align: center;
    margin-bottom: 2.5rem;
}
.section-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    letter-spacing: -.02em;
    margin-bottom: .5rem;
}
.section-sub {
    color: var(--text-secondary);
    font-size: .95rem;
}

/* ── 4. Buttons (reusable) ────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .7rem 1.5rem;
    border-radius: var(--radius-sm);
    font-size: .95rem;
    font-weight: 600;
    letter-spacing: .01em;
    transition: transform var(--dur) var(--ease),
                box-shadow var(--dur) var(--ease),
                background var(--dur) var(--ease);
    white-space: nowrap;
}
.btn:active { transform: scale(.97); }

/* Primary CTA — neon blue fill */
.btn-primary {
    background: var(--neon-text);
    color: #000;
    box-shadow: 0 0 14px 0 rgba(0,229,255,.35);
}
.btn-primary:hover {
    background: #33eaff;
    box-shadow: 0 0 22px 0 rgba(0,229,255,.55);
    transform: translateY(-2px);
}

/* Outline CTA */
.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1.5px solid var(--border-subtle);
}
.btn-outline:hover {
    border-color: var(--neon-default);
    color: var(--neon-default);
    box-shadow: 0 0 10px rgba(0,229,255,.2);
    transform: translateY(-2px);
}

/* ── 5. AdSense Slots (placeholder layout) ────────── */
.ad-slot {
    width: 100%;
    min-height: 90px;
    border: 1px dashed var(--border-dark);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: .75rem;
    letter-spacing: .05em;
    text-transform: uppercase;
    margin-block: 2rem;
}
.ad-slot::before { content: 'Ad Slot'; }


/* ══════════════════════════════════════════════════
   HEADER
══════════════════════════════════════════════════ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-h);
    background: rgba(5,5,5,.88);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border-dark);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    gap: 1.5rem;
}

/* Logo */
.logo {
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -.03em;
    flex-shrink: 0;
}
.logo-prime  { color: var(--text-primary); }
.logo-hub    { color: var(--neon-text); }
.logo-tools  { color: var(--text-secondary); font-weight: 400; }

/* Nav */
.main-nav > ul {
    display: flex;
    align-items: center;
    gap: .25rem;
}
.nav-link {
    padding: .4rem .75rem;
    border-radius: var(--radius-sm);
    font-size: .9rem;
    color: var(--text-secondary);
    transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    background: var(--border-dark);
}

/* Language flag links */
.lang-flags-item {
    display: flex;
    align-items: center;
    gap: .35rem;
    padding-inline: .25rem;
}
.lang-flag-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    line-height: 1;
    padding: .3rem;
    border-radius: var(--radius-sm);
    opacity: .75;
    transition: opacity var(--dur) var(--ease), background var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.lang-flag-link:hover {
    opacity: 1;
    background: var(--border-dark);
    transform: translateY(-1px);
}

/* Mobile hamburger */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 36px;
    height: 36px;
    padding: 4px;
    flex-shrink: 0;
}
.nav-toggle span {
    display: block;
    height: 2px;
    width: 100%;
    background: var(--text-primary);
    border-radius: 2px;
    transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
/* Hamburger → X animation */
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav */
@media (max-width: 700px) {
    .nav-toggle {
        display: flex;
    }

    .main-nav {
        position: fixed;
        top: var(--header-h);
        right: 0;
        width: 280px;
        height: calc(100vh - var(--header-h));

        background: #050505;

        display: flex;
        align-items: flex-start;
        justify-content: flex-start;

        padding: 25px 20px;

        opacity: 0;
        pointer-events: none;

        transition: opacity var(--dur) var(--ease);

        z-index: 99;
    }

    .main-nav.open {
        opacity: 1;
        pointer-events: auto;
    }

    .main-nav > ul {
        width: 100%;
        display: flex;
        flex-direction: column;
        gap: .5rem;

        text-align: right;
        align-items: flex-end;
    }

    .nav-link {
        display: block;
        width: 100%;

        font-size: 1.2rem;
        padding: .65rem 1rem;

        text-align: right;
    }

    .lang-flags-item {
        justify-content: flex-end;
        width: 100%;
        padding-block: .25rem;
    }

    .lang-flag-link {
        font-size: 1.6rem;
        padding: .4rem .6rem;
    }
}


/* ══════════════════════════════════════════════════
   HERO
══════════════════════════════════════════════════ */
.hero {
    position: relative;
    overflow: hidden;
    background: var(--bg-secondary);
    padding-block: clamp(4rem, 10vw, 7rem);
    text-align: center;
    isolation: isolate;
}

/* Ambient gradient glow behind content */
.hero-glow {
    position: absolute;
    top: -120px;
    left: 50%;
    transform: translateX(-50%);
    width: 700px;
    height: 500px;
    background: radial-gradient(ellipse at center,
        rgba(0,229,255,.12) 0%,
        rgba(168,85,247,.07) 50%,
        transparent 70%);
    pointer-events: none;
    z-index: -1;
}

.hero-inner {
    position: relative;
    z-index: 1;
}

.hero-eyebrow {
    display: inline-block;
    font-size: .8rem;
    font-weight: 600;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--neon-text);
    border: 1px solid rgba(0,229,255,.3);
    border-radius: 999px;
    padding: .25rem .9rem;
    margin-bottom: 1.5rem;
}

.hero-title {
    font-size: clamp(2.2rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -.03em;
    margin-bottom: 1.25rem;
}
.hero-accent {
    /* Neon gradient text */
    background: linear-gradient(90deg, var(--neon-text) 0%, #7cddff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-sub {
    font-size: clamp(.95rem, 2vw, 1.15rem);
    color: var(--text-secondary);
    max-width: 580px;
    margin-inline: auto;
    margin-bottom: 2.25rem;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}


/* ══════════════════════════════════════════════════
   SEARCH
══════════════════════════════════════════════════ */
.search-section {
    background: var(--bg-section);
    padding-block: 2rem;
    border-bottom: 1px solid var(--border-dark);
}

.search-wrapper {
    position: relative;
    max-width: 620px;
    margin-inline: auto;
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1rem;
    pointer-events: none;
    user-select: none;
}

.search-input {
    width: 100%;
    background: var(--bg-card);
    border: 1.5px solid var(--border-dark);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    padding: .85rem 3rem .85rem 2.8rem;
    transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
    appearance: none;
    -webkit-appearance: none;
}
.search-input::placeholder { color: var(--text-muted); }
.search-input:focus {
    outline: none;
    border-color: var(--neon-text);
    box-shadow: 0 0 0 3px rgba(0,229,255,.12);
}

.search-clear {
    position: absolute;
    right: .75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: .85rem;
    padding: .35rem;
    border-radius: 50%;
    transition: color var(--dur) var(--ease);
}
.search-clear:hover { color: var(--text-primary); }

.search-count {
    text-align: center;
    font-size: .82rem;
    color: var(--text-muted);
    margin-top: .6rem;
    min-height: 1.2em;
}


/* ══════════════════════════════════════════════════
   TOOLS SECTION
══════════════════════════════════════════════════ */
.tools-section {
    background: var(--bg-base);
    padding-block: 3rem 4rem;
}

/* ── Category filter pills ── */
.category-filters {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    justify-content: center;
    margin-bottom: 2.5rem;
}

.cat-btn {
    padding: .45rem 1.1rem;
    border-radius: 999px;
    font-size: .85rem;
    font-weight: 500;
    color: var(--text-secondary);
    border: 1.5px solid var(--border-dark);
    background: var(--bg-card);
    transition: color var(--dur) var(--ease),
                border-color var(--dur) var(--ease),
                box-shadow var(--dur) var(--ease),
                background var(--dur) var(--ease);
}
.cat-btn:hover {
    color: var(--cat-color, var(--neon-default));
    border-color: var(--cat-color, var(--neon-default));
}
.cat-btn.active {
    color: var(--cat-color, var(--neon-default));
    border-color: var(--cat-color, var(--neon-default));
    background: rgba(0,0,0,.4);
    box-shadow: 0 0 10px rgba(0,0,0,0) ,
                0 0 0 1px var(--cat-color, var(--neon-default)),
                0 0 14px -2px var(--cat-color, var(--neon-default));
}

/* ── Cards grid ── */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
    gap: 1.25rem;
}

/* ── Individual tool card ── */
.tool-card {
    position: relative;
    display: flex;
    flex-direction: column;
    background: var(--bg-card);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: transform var(--dur) var(--ease),
                box-shadow var(--dur) var(--ease),
                border-color var(--dur) var(--ease),
                background var(--dur) var(--ease);
}

.tool-card:hover {
    transform: translateY(-4px);
    background: var(--bg-card-hover);
    border-color: var(--card-neon, var(--neon-default));
    box-shadow:
        0 8px 32px rgba(0,0,0,.4),
        0 0 18px -4px var(--card-neon, var(--neon-default));
}

/* Neon top accent bar */
.card-neon-bar {
    height: 3px;
    width: 100%;
    background: var(--card-neon, var(--neon-default));
    opacity: .8;
    flex-shrink: 0;
}
.tool-card:hover .card-neon-bar { opacity: 1; }

/* Card header row: icon + star */
.card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: 1.1rem 1.1rem .4rem;
}

.card-icon {
    font-size: 1.7rem;
    line-height: 1;
    /* Developer Tools use text icon "{ }" — keep consistent size */
    font-family: 'Courier New', Courier, monospace;
}

/* Favourite star button */
.fav-btn {
    font-size: 1.25rem;
    color: var(--border-subtle);
    line-height: 1;
    padding: .15rem .3rem;
    border-radius: var(--radius-sm);
    transition: color var(--dur) var(--ease),
                text-shadow var(--dur) var(--ease),
                transform var(--dur) var(--ease);
}
.fav-btn:hover            { color: var(--star-active); transform: scale(1.15); }
.fav-btn[aria-pressed="true"] {
    color: var(--star-active);
    text-shadow: 0 0 10px rgba(255,214,0,.6);
}

/* Card body */
.card-body {
    padding: .4rem 1.1rem .75rem;
    flex: 1;
}

.cat-badge {
    display: inline-block;
    font-size: .7rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    border: 1px solid;
    border-radius: 4px;
    padding: .15rem .5rem;
    margin-bottom: .6rem;
    opacity: .85;
}

.card-title {
    font-size: 1rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: .4rem;
    color: var(--text-primary);
}

.card-desc {
    font-size: .83rem;
    color: var(--text-secondary);
    line-height: 1.55;
}

/* Card footer: CTA */
.card-footer {
    padding: .75rem 1.1rem 1.1rem;
}

.btn-open-tool {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    font-size: .85rem;
    font-weight: 600;
    color: var(--card-neon, var(--neon-default));
    border: 1.5px solid var(--card-neon, var(--neon-default));
    border-radius: var(--radius-sm);
    padding: .5rem 1rem;
    transition: background var(--dur) var(--ease),
                color var(--dur) var(--ease),
                box-shadow var(--dur) var(--ease);
}
.btn-open-tool:hover {
    background: var(--card-neon, var(--neon-default));
    color: #000;
    box-shadow: 0 0 12px -2px var(--card-neon, var(--neon-default));
}

/* Hidden card (filtered out) */
.tool-card[hidden] { display: none; }

/* No-results state */
.no-results {
    text-align: center;
    padding: 4rem 1rem;
    color: var(--text-secondary);
}
.no-results-icon { font-size: 2.5rem; margin-bottom: 1rem; }
.no-results p    { margin-bottom: 1.25rem; }


/* ══════════════════════════════════════════════════
   FAVOURITES SECTION
══════════════════════════════════════════════════ */
.favorites-section {
    background: var(--bg-section);
    padding-block: 3rem 4rem;
    border-top: 1px solid var(--border-dark);
}

.empty-favorites {
    text-align: center;
    padding: 3.5rem 1rem;
    color: var(--text-secondary);
}
.empty-icon   { font-size: 2.5rem; margin-bottom: .75rem; display: block; }
.empty-hint   { font-size: .85rem; color: var(--text-muted); margin-top: .4rem; }


/* ══════════════════════════════════════════════════
   FOOTER
══════════════════════════════════════════════════ */
.site-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-dark);
    padding-top: 3rem;
}

.footer-inner {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 2rem;
    flex-wrap: wrap;
    padding-bottom: 2.5rem;
}

.footer-logo { font-size: 1.2rem; margin-bottom: .6rem; display: inline-block; }

.footer-tagline {
    font-size: .85rem;
    color: var(--text-secondary);
    max-width: 320px;
    line-height: 1.6;
}

.footer-nav ul {
    display: flex;
    flex-wrap: wrap;
    gap: .35rem 1.25rem;
    align-items: center;
}
.footer-nav a {
    font-size: .88rem;
    color: var(--text-secondary);
    transition: color var(--dur) var(--ease);
}
.footer-nav a:hover { color: var(--neon-text); }

.footer-bottom {
    border-top: 1px solid var(--border-dark);
    padding-block: 1rem;
    text-align: center;
}
.footer-bottom p {
    font-size: .8rem;
    color: var(--text-muted);
}


/* ══════════════════════════════════════════════════
   REUSABLE TOOL PAGE LAYOUT
   (ready for future tool pages)
══════════════════════════════════════════════════ */
.tool-page { padding-block: 2.5rem 4rem; }

.tool-page-header {
    margin-bottom: 2rem;
}
.tool-page-eyebrow {
    font-size: .78rem;
    font-weight: 600;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: .4rem;
}
.tool-page-title {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 800;
    letter-spacing: -.02em;
}
.tool-page-desc {
    color: var(--text-secondary);
    margin-top: .5rem;
    font-size: .95rem;
}

/* Tool panel — the main input/output area */
.tool-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-lg);
    padding: clamp(1.25rem, 3vw, 2rem);
    margin-bottom: 1.5rem;
}

/* Textarea used in tools */
.tool-textarea {
    width: 100%;
    min-height: 160px;
    background: var(--bg-section);
    border: 1.5px solid var(--border-dark);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: 'Courier New', Courier, monospace;
    font-size: .9rem;
    padding: .75rem 1rem;
    resize: vertical;
    transition: border-color var(--dur) var(--ease);
}
.tool-textarea:focus {
    outline: none;
    border-color: var(--neon-default);
}

/* Tool action row */
.tool-actions {
    display: flex;
    flex-wrap: wrap;
    gap: .75rem;
    margin-top: 1rem;
}

/* Result output box */
.tool-result {
    background: var(--bg-section);
    border: 1.5px solid var(--border-dark);
    border-radius: var(--radius-sm);
    padding: 1rem;
    font-family: 'Courier New', Courier, monospace;
    font-size: .9rem;
    color: var(--text-secondary);
    min-height: 80px;
    word-break: break-all;
    white-space: pre-wrap;
}

/* Stat chips (e.g. word count, char count) */
.stat-chips {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    margin-top: 1rem;
}
.stat-chip {
    background: var(--bg-section);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-sm);
    padding: .35rem .75rem;
    font-size: .82rem;
    color: var(--text-secondary);
}
.stat-chip strong { color: var(--text-primary); }

/* Copy button feedback */
.btn-copy.copied {
    background: var(--neon-developer);
    color: #000;
    border-color: var(--neon-developer);
}


/* ══════════════════════════════════════════════════
   UTILITIES
══════════════════════════════════════════════════ */
.sr-only {
    position: absolute;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0,0,0,0);
    white-space: nowrap; border: 0;
}

.text-neon  { color: var(--neon-text); }
.text-muted { color: var(--text-muted); }

/* Fade-in for dynamically rendered cards */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(14px); }
    to   { opacity: 1; transform: translateY(0); }
}
.tool-card { animation: fadeInUp .3s var(--ease) both; }


/* ══════════════════════════════════════════════════
   RESPONSIVE TWEAKS
══════════════════════════════════════════════════ */
@media (max-width: 900px) {
    .tools-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    }
}

@media (max-width: 600px) {
    .hero-actions { flex-direction: column; align-items: center; }
    .tools-grid   { grid-template-columns: 1fr; }

    .footer-inner {
        flex-direction: column;
        gap: 1.5rem;
    }
    .footer-nav ul { justify-content: flex-start; }

    .tool-actions { flex-direction: column; }
    .tool-actions .btn { width: 100%; justify-content: center; }
}