/* ===== CSS RESET & VARIABLES ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #07070f;
    --bg-secondary: #0d0d1a;
    --bg-card: #111128;
    --bg-card-hover: #16163a;
    --bg-input: #0f0f24;

    --text-primary: #e8e8f0;
    --text-secondary: #8888aa;
    --text-muted: #55557a;

    --accent-1: #7c3aed;
    --accent-2: #3b82f6;
    --accent-3: #06b6d4;
    --gradient-main: linear-gradient(135deg, var(--accent-1), var(--accent-2), var(--accent-3));
    --gradient-subtle: linear-gradient(135deg, rgba(124, 58, 237, 0.15), rgba(59, 130, 246, 0.15), rgba(6, 182, 212, 0.15));

    --border-color: rgba(136, 136, 170, 0.12);
    --border-glow: rgba(124, 58, 237, 0.3);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(124, 58, 237, 0.15);

    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== HEADER ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(7, 7, 15, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    font-size: 1.25rem;
    font-weight: 800;
}

.logo-icon {
    font-size: 1.5rem;
}

.logo-text {
    color: var(--text-primary);
}

.logo-accent {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav {
    display: flex;
    gap: 32px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Logic for showing/hiding on different screens */
.mobile-only {
    display: none;
}

.desktop-only {
    display: flex;
}

@media (max-width: 768px) {
    .desktop-only {
        display: none;
    }

    .mobile-only {
        display: flex;
    }
}

.nav-link:hover {
    color: var(--text-primary);
}

/* ===== MENU TOGGLE (HAMBURGER) ===== */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1000;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* Hamburger Animation */
.menu-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--bg-secondary);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        padding: 40px;
        gap: 32px;
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 99;
    }

    .nav.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .nav-link {
        font-size: 1.5rem;
        font-weight: 700;
        color: var(--text-primary);
    }
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-family: var(--font);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-main);
    color: white;
    box-shadow: 0 4px 20px rgba(124, 58, 237, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(124, 58, 237, 0.45);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-glow);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.05rem;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

.btn-arrow {
    transition: transform var(--transition);
}

.btn:hover .btn-arrow {
    transform: translateX(4px);
}

.btn-icon {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 1.1rem;
    transition: all var(--transition);
}

.btn-icon:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-glow);
}

/* ===== HERO ===== */
.hero {
    position: relative;
    padding: 160px 0 80px;
    text-align: center;
    overflow: hidden;
}

.hero-glow {
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 500px;
    background: radial-gradient(ellipse, rgba(124, 58, 237, 0.12) 0%, rgba(59, 130, 246, 0.06) 40%, transparent 70%);
    pointer-events: none;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    border-radius: 100px;
    background: var(--gradient-subtle);
    border: 1px solid var(--border-color);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 24px;
    animation: fadeInUp 0.6s ease;
}

.hero-title {
    font-size: clamp(2.2rem, 5vw, 3.8rem);
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
    animation: fadeInUp 0.6s ease 0.1s both;
}

.gradient-text {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 580px;
    margin: 0 auto 32px;
    line-height: 1.7;
    animation: fadeInUp 0.6s ease 0.2s both;
}

.hero .btn {
    animation: fadeInUp 0.6s ease 0.3s both;
}

/* ===== AD SLOTS ===== */
.ad-slot {
    padding: 16px 0;
}

.ad-placeholder {
    max-width: 728px;
    margin: 0 auto;
    padding: 20px;
    text-align: center;
    background: var(--bg-secondary);
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: 0.8rem;
}

.ad-placeholder a {
    color: var(--accent-2);
    text-decoration: none;
}

/* ===== SECTIONS ===== */
.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-title {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

/* ===== TOOLS SECTION ===== */
.tools-section {
    padding: 80px 0;
}

/* Tool Tabs */
.tool-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.tool-tab {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 14px 24px;
    border-radius: var(--radius-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-family: var(--font);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
}

.tool-tab:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
    border-color: var(--border-glow);
}

.tool-tab.active {
    background: var(--gradient-subtle);
    border-color: var(--accent-1);
    color: var(--text-primary);
    box-shadow: var(--shadow-glow);
}

.tool-tab-icon {
    font-size: 1.5rem;
}

/* Tool Panels */
.tool-panels {
    position: relative;
}

.tool-panel {
    display: none;
    animation: fadeIn 0.4s ease;
}

.tool-panel.active {
    display: block;
}

/* Tool Card */
.tool-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.tool-card-header {
    padding: 32px 32px 0;
}

.tool-card-header h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.tool-card-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.tool-card-body {
    padding: 28px 32px 32px;
}

/* ===== INPUTS ===== */
.input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.95rem;
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
}

.input:focus {
    border-color: var(--accent-1);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
}

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

.textarea {
    resize: vertical;
    min-height: 120px;
}

.code-textarea {
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
}

label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

select.input {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238888aa' stroke-width='2'%3e%3cpath d='M6 9l6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    padding-right: 40px;
}

.input-color {
    width: 48px;
    height: 40px;
    padding: 4px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-input);
    cursor: pointer;
}

.input-row {
    display: flex;
    gap: 16px;
    margin-top: 16px;
}

.input-group-small {
    flex: 1;
}

/* ===== QR CODE TOOL ===== */
.tool-row {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 32px;
    align-items: start;
}

.tool-input-group {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.tool-output-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.qr-preview {
    width: 280px;
    height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-input);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.qr-preview img {
    max-width: 100%;
    max-height: 100%;
}

.preview-placeholder {
    color: var(--text-muted);
    font-size: 0.85rem;
    text-align: center;
    padding: 20px;
}

/* ===== PASSWORD TOOL ===== */
.password-output-wrap {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.password-display {
    font-family: 'Courier New', monospace;
    font-size: 1.15rem;
    letter-spacing: 1px;
    font-weight: 600;
}

.password-strength {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}

.strength-bar {
    flex: 1;
    height: 6px;
    background: var(--bg-input);
    border-radius: 100px;
    overflow: hidden;
}

.strength-fill {
    height: 100%;
    width: 0%;
    border-radius: 100px;
    transition: width 0.5s ease, background 0.5s ease;
}

.strength-label {
    font-size: 0.8rem;
    font-weight: 600;
    min-width: 80px;
    text-align: right;
}

.password-options {
    margin-bottom: 24px;
}

.option-row {
    margin-bottom: 16px;
}

.option-row label {
    margin-bottom: 8px;
    color: var(--text-primary);
}

.range-input {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--bg-input);
    border-radius: 100px;
    outline: none;
}

.range-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--gradient-main);
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(124, 58, 237, 0.4);
}

.checkbox-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--text-primary);
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent-1);
    cursor: pointer;
}

/* ===== WORD COUNTER ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-top: 20px;
}

.stat-card {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    text-align: center;
    transition: border-color var(--transition);
}

.stat-card:hover {
    border-color: var(--border-glow);
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 0.78rem;
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ===== COLOR PALETTE ===== */
.palette-controls {
    display: flex;
    align-items: flex-end;
    gap: 16px;
    margin-bottom: 24px;
}

.palette-controls .input-group-small {
    flex: 0 0 200px;
}

.palette-display {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 12px;
    margin-bottom: 12px;
}

.palette-color {
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: 12px;
    transition: transform var(--transition), box-shadow var(--transition);
    position: relative;
    overflow: hidden;
    min-height: 120px;
}

.palette-color:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.palette-color-hex {
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    padding: 4px 8px;
    border-radius: 6px;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    color: white;
}

.palette-hint {
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ===== JSON FORMATTER ===== */
.json-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

.json-col label {
    margin-bottom: 8px;
}

.json-output-pre {
    width: 100%;
    min-height: 290px;
    max-height: 400px;
    padding: 14px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--accent-3);
    font-family: 'Courier New', monospace;
    font-size: 0.88rem;
    line-height: 1.6;
    overflow: auto;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.json-status {
    min-height: 28px;
    margin-bottom: 12px;
    font-size: 0.85rem;
    font-weight: 500;
}

.json-status.success {
    color: #22c55e;
}

.json-status.error {
    color: #ef4444;
}

.json-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* ===== PRICING ===== */
.pricing-section {
    padding: 80px 0;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 750px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 36px;
    position: relative;
    transition: all var(--transition);
}

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

.pricing-card-featured {
    border-color: var(--accent-1);
    background: linear-gradient(180deg, rgba(124, 58, 237, 0.08) 0%, var(--bg-secondary) 100%);
    box-shadow: var(--shadow-glow);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 4px 16px;
    background: var(--gradient-main);
    color: white;
    font-size: 0.78rem;
    font-weight: 700;
    border-radius: 100px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.pricing-card-header {
    text-align: center;
    margin-bottom: 24px;
}

.pricing-tier {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.pricing-price {
    font-size: 3rem;
    font-weight: 900;
    margin-top: 8px;
    letter-spacing: -0.02em;
}

.pricing-price span {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.pricing-features {
    list-style: none;
    margin-bottom: 28px;
}

.pricing-features li {
    padding: 8px 0;
    font-size: 0.92rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

.pricing-features li:last-child {
    border-bottom: none;
}

/* ===== FAQ ===== */
.faq-section {
    padding: 80px 0;
}

.faq-list {
    max-width: 700px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    overflow: hidden;
    transition: border-color var(--transition);
}

.faq-item:hover,
.faq-item[open] {
    border-color: var(--border-glow);
}

.faq-question {
    padding: 18px 24px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: background var(--transition);
}

.faq-question:hover {
    background: var(--bg-card);
}

.faq-question::after {
    content: '+';
    font-size: 1.3rem;
    color: var(--accent-1);
    transition: transform var(--transition);
}

.faq-item[open] .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 24px 18px;
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.7;
}

/* ===== FOOTER ===== */
.footer {
    padding: 60px 0 32px;
    border-top: 1px solid var(--border-color);
}

.footer-inner {
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 8px;
}

.footer-tagline {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 20px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 24px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.88rem;
    transition: color var(--transition);
}

.footer-links a:hover {
    color: var(--text-primary);
}

.footer-copy {
    color: var(--text-muted);
    font-size: 0.78rem;
}

/* ===== TOAST ===== */
.toast {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-card);
    border: 1px solid var(--accent-1);
    color: var(--text-primary);
    padding: 12px 28px;
    border-radius: var(--radius-xl);
    font-size: 0.9rem;
    font-weight: 600;
    box-shadow: var(--shadow-md), var(--shadow-glow);
    opacity: 0;
    transition: all 0.4s ease;
    z-index: 1000;
    pointer-events: none;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

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

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

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .nav {
        display: none;
    }

    .hero {
        padding: 120px 0 60px;
    }

    .tool-row {
        grid-template-columns: 1fr;
    }

    .tool-output-group {
        align-items: center;
    }

    .qr-preview {
        width: 220px;
        height: 220px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .json-layout {
        grid-template-columns: 1fr;
    }

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

    .palette-display {
        grid-template-columns: repeat(5, 1fr);
    }

    .palette-color {
        min-height: 80px;
    }

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

    .tool-tabs {
        gap: 6px;
    }

    .tool-tab {
        padding: 10px 14px;
    }

    .tool-card-body {
        padding: 20px;
    }

    .tool-card-header {
        padding: 20px 20px 0;
    }

    .input-row {
        flex-direction: column;
        gap: 12px;
    }
}

@media (max-width: 480px) {
    .palette-display {
        grid-template-columns: repeat(3, 1fr);
    }

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

    .tool-tab {
        padding: 8px 10px;
        font-size: 0.75rem;
    }

    .tool-tab-icon {
        font-size: 1.2rem;
    }

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

    .json-actions .btn {
        justify-content: center;
    }
}