/* ============================================================
   BULK EMAIL ADDRESS TESTER — style.css
   SEOWebChecker.com | © 2026 All Rights Reserved
   ============================================================ */

/* ---- CSS Custom Properties ---- */
:root {
    /* Brand */
    --brand-primary:   #2563EB;
    --brand-secondary: #0EA5E9;
    --brand-accent:    #7C3AED;
    --brand-gradient:  linear-gradient(135deg, #2563EB 0%, #7C3AED 100%);

    /* Light Theme */
    --bg-primary:      #FFFFFF;
    --bg-secondary:    #F8FAFC;
    --bg-tertiary:     #F1F5F9;
    --bg-card:         #FFFFFF;
    --border-color:    #E2E8F0;
    --text-primary:    #0F172A;
    --text-secondary:  #475569;
    --text-muted:      #94A3B8;
    --shadow-sm:       0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.05);
    --shadow-md:       0 4px 16px rgba(0,0,0,.08), 0 2px 6px rgba(0,0,0,.05);
    --shadow-lg:       0 12px 40px rgba(0,0,0,.12), 0 4px 12px rgba(0,0,0,.06);

    /* Status */
    --valid-color:     #16A34A;
    --valid-bg:        #DCFCE7;
    --invalid-color:   #DC2626;
    --invalid-bg:      #FEE2E2;
    --disposable-color:#D97706;
    --disposable-bg:   #FEF3C7;
    --duplicate-color: #2563EB;
    --duplicate-bg:    #DBEAFE;
    --typo-color:      #9333EA;
    --typo-bg:         #F3E8FF;

    /* Layout */
    --radius-sm:       6px;
    --radius-md:       10px;
    --radius-lg:       16px;
    --radius-xl:       24px;
    --container:       1200px;
    --nav-height:      68px;

    /* Typography */
    --font-display:    'Outfit', sans-serif;
    --font-body:       'Inter', sans-serif;
}

[data-theme="dark"] {
    --bg-primary:      #0A0F1E;
    --bg-secondary:    #111827;
    --bg-tertiary:     #1E293B;
    --bg-card:         #141E33;
    --border-color:    #1E293B;
    --text-primary:    #F1F5F9;
    --text-secondary:  #94A3B8;
    --text-muted:      #475569;
    --shadow-sm:       0 1px 3px rgba(0,0,0,.4);
    --shadow-md:       0 4px 16px rgba(0,0,0,.5);
    --shadow-lg:       0 12px 40px rgba(0,0,0,.6);
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    overflow-x: hidden;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    transition: background .3s ease, color .3s ease;
    overflow-x: hidden;
    min-width: 320px;
}

a { color: var(--brand-primary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--brand-accent); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ---- Container ---- */
.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* ---- COOKIE BANNER ---- */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border-top: 2px solid var(--brand-primary);
    box-shadow: var(--shadow-lg);
    z-index: 9999;
    padding: 14px 20px;
    display: none;
}
.cookie-banner.visible { display: block; }
.cookie-inner {
    max-width: var(--container);
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}
.cookie-icon { font-size: 1.5rem; flex-shrink: 0; }
.cookie-inner p {
    flex: 1;
    color: var(--text-secondary);
    font-size: .9rem;
    min-width: 200px;
}
.cookie-actions { display: flex; gap: 8px; flex-shrink: 0; }
.btn-cookie {
    padding: 8px 18px;
    border-radius: var(--radius-sm);
    font-size: .85rem;
    font-weight: 600;
    transition: all .2s;
}
.btn-cookie.accept {
    background: var(--brand-primary);
    color: #fff;
}
.btn-cookie.accept:hover { background: #1D4ED8; }
.btn-cookie.dismiss {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}
.btn-cookie.dismiss:hover { background: var(--border-color); }

/* ---- HEADER / NAV ---- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: background .3s;
}

.navbar { height: var(--nav-height); }

.nav-container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    gap: 12px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    flex-shrink: 0;
}
.logo-icon { font-size: 1.4rem; }
.logo-text {
    font-family: var(--font-display);
    font-size: 1.15rem;
    color: var(--text-primary);
    white-space: nowrap;
}
.logo-text strong { color: var(--brand-primary); }

/* Hamburger */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    flex-shrink: 0;
}
.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all .3s;
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Nav Menu */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
    justify-content: flex-end;
}

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

.nav-item { position: relative; }

.nav-link {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: .88rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all .2s;
    white-space: nowrap;
}
.nav-link:hover,
.nav-link[aria-current="page"] {
    background: var(--bg-tertiary);
    color: var(--brand-primary);
}
.nav-arrow { font-size: .7rem; transition: transform .2s; }
.nav-item.has-dropdown:hover .nav-arrow { transform: rotate(180deg); }

/* Mega Dropdown */
.mega-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 20px;
    display: none;
    min-width: 560px;
    grid-template-columns: 1fr 1fr;
    gap: 0 24px;
    z-index: 200;
}
.nav-item.has-dropdown:hover .mega-dropdown { display: grid; }

.mega-col { min-width: 220px; }
.mega-heading {
    font-size: .75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: var(--text-muted);
    margin-bottom: 10px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--border-color);
}
.mega-col ul { display: flex; flex-direction: column; gap: 1px; }
.mega-col ul li a {
    display: block;
    padding: 6px 8px;
    font-size: .84rem;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: all .15s;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.mega-col ul li a:hover {
    background: var(--bg-tertiary);
    color: var(--brand-primary);
    padding-left: 14px;
}

/* Theme Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    font-size: 1.1rem;
    transition: all .2s;
    flex-shrink: 0;
}
.theme-toggle:hover {
    background: var(--brand-primary);
    border-color: var(--brand-primary);
    transform: rotate(15deg);
}
.theme-icon { line-height: 1; }
[data-theme="light"] .theme-icon.moon { display: none; }
[data-theme="dark"]  .theme-icon.sun  { display: none; }

/* ---- BREADCRUMB ---- */
.breadcrumb-wrap {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 10px 0;
}
.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
    font-size: .82rem;
    color: var(--text-muted);
}
.breadcrumb a { color: var(--brand-primary); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb [aria-current="page"] { color: var(--text-secondary); font-weight: 500; }

/* ---- HERO ---- */
.hero-section {
    background: var(--brand-gradient);
    padding: 80px 0 100px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.hero-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255,255,255,.15);
    border: 1px solid rgba(255,255,255,.25);
    color: #fff;
    padding: 6px 16px;
    border-radius: 100px;
    font-size: .82rem;
    font-weight: 600;
    margin-bottom: 20px;
    backdrop-filter: blur(4px);
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.4rem);
    font-weight: 800;
    color: #fff;
    line-height: 1.15;
    margin-bottom: 18px;
    letter-spacing: -.02em;
}

.hero-subtitle {
    font-size: clamp(.95rem, 2vw, 1.18rem);
    color: rgba(255,255,255,.85);
    max-width: 620px;
    margin: 0 auto 36px;
    font-weight: 400;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0;
    margin-bottom: 36px;
}
.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 12px 28px;
}
.stat strong {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 800;
    color: #fff;
    line-height: 1;
}
.stat span {
    font-size: .75rem;
    color: rgba(255,255,255,.7);
    margin-top: 2px;
    text-transform: uppercase;
    letter-spacing: .06em;
}
.stat-sep {
    width: 1px;
    height: 40px;
    background: rgba(255,255,255,.2);
}

.hero-cta {
    background: #fff;
    color: var(--brand-primary);
    font-weight: 700;
    font-size: 1rem;
    padding: 14px 32px;
    border-radius: var(--radius-lg);
    display: inline-block;
    box-shadow: 0 4px 20px rgba(0,0,0,.2);
    transition: all .2s;
}
.hero-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(0,0,0,.25);
    color: var(--brand-accent);
}

.hero-wave {
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    line-height: 0;
}
.hero-wave svg { width: 100%; height: auto; }

/* ---- BUTTONS ---- */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--brand-gradient);
    color: #fff;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: .95rem;
    padding: 12px 28px;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all .2s;
    text-decoration: none;
    white-space: nowrap;
}
.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(37,99,235,.4);
    color: #fff;
}
.btn-primary:disabled {
    opacity: .6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-card);
    color: var(--brand-primary);
    font-weight: 600;
    font-size: .9rem;
    padding: 11px 24px;
    border-radius: var(--radius-md);
    border: 2px solid var(--brand-primary);
    cursor: pointer;
    transition: all .2s;
    text-decoration: none;
}
.btn-secondary:hover {
    background: var(--brand-primary);
    color: #fff;
}

/* ---- TOOL SECTION ---- */
.tool-section {
    background: var(--bg-secondary);
    padding: 60px 0;
}

.tool-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    margin-bottom: 32px;
}

.tool-header {
    background: var(--brand-gradient);
    padding: 24px 28px;
    color: #fff;
}
.tool-header h2 {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 4px;
}
.tool-header p { opacity: .85; font-size: .9rem; }

/* Options Bar */
.options-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    padding: 16px 24px 0;
}
.option-check {
    display: flex;
    align-items: center;
    gap: 7px;
    cursor: pointer;
    font-size: .85rem;
    font-weight: 500;
    color: var(--text-secondary);
    user-select: none;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    transition: all .15s;
}
.option-check:hover { border-color: var(--brand-primary); color: var(--brand-primary); }
.option-check input[type="checkbox"] {
    width: 15px;
    height: 15px;
    accent-color: var(--brand-primary);
    cursor: pointer;
}

/* Textarea */
.textarea-wrap {
    padding: 16px 24px;
}
textarea {
    width: 100%;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 14px;
    font-family: 'JetBrains Mono', 'Courier New', monospace;
    font-size: .87rem;
    line-height: 1.6;
    resize: vertical;
    min-height: 200px;
    transition: border-color .2s, box-shadow .2s;
}
textarea:focus {
    outline: none;
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,.12);
    background: var(--bg-card);
}
textarea.error {
    border-color: var(--invalid-color);
    box-shadow: 0 0 0 3px rgba(220,38,38,.1);
}

.textarea-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 8px;
    flex-wrap: wrap;
    gap: 8px;
}
.counter {
    font-size: .8rem;
    color: var(--text-muted);
    font-weight: 500;
}
.toolbar-btns { display: flex; gap: 6px; }

.btn-tool {
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    font-size: .8rem;
    font-weight: 600;
    border: 1.5px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    transition: all .15s;
}
.btn-tool:hover { border-color: var(--brand-primary); color: var(--brand-primary); }
.btn-tool.btn-danger:hover { border-color: var(--invalid-color); color: var(--invalid-color); }

.form-hint {
    padding: 0 24px;
    font-size: .84rem;
    min-height: 20px;
    margin-bottom: 4px;
}
.form-hint.error-msg { color: var(--invalid-color); }
.form-hint.success-msg { color: var(--valid-color); }

.form-action {
    padding: 16px 24px 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.btn-submit {
    font-size: 1rem;
    padding: 14px 36px;
    min-width: 200px;
    justify-content: center;
}
.btn-spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255,255,255,.4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin .7s linear infinite;
    flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Progress */
.progress-wrap { flex: 1; min-width: 200px; }
.progress-bar {
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 100px;
    overflow: hidden;
    margin-bottom: 4px;
}
.progress-fill {
    height: 100%;
    background: var(--brand-gradient);
    border-radius: 100px;
    width: 0%;
    transition: width .4s ease;
}
.progress-label { font-size: .8rem; color: var(--text-muted); }

/* ---- RESULT SECTION ---- */
.result-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    animation: fadeUp .4s ease;
}
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

.result-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 12px;
    background: var(--bg-secondary);
}
.result-header h2 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
}

.result-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.btn-action {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: .82rem;
    font-weight: 600;
    background: var(--bg-card);
    color: var(--text-secondary);
    border: 1.5px solid var(--border-color);
    transition: all .2s;
}
.btn-action:hover {
    background: var(--brand-primary);
    color: #fff;
    border-color: var(--brand-primary);
}

/* Summary Grid */
.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1px;
    background: var(--border-color);
    border-bottom: 1px solid var(--border-color);
}
.summary-card {
    padding: 20px 16px;
    background: var(--bg-card);
    text-align: center;
}
.summary-card .s-num {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 4px;
}
.summary-card .s-label {
    font-size: .76rem;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--text-muted);
    font-weight: 600;
}
.summary-card.total  .s-num { color: var(--text-primary); }
.summary-card.valid  .s-num { color: var(--valid-color); }
.summary-card.invalid .s-num { color: var(--invalid-color); }
.summary-card.disposable .s-num { color: var(--disposable-color); }
.summary-card.duplicate  .s-num { color: var(--duplicate-color); }
.summary-card.typo  .s-num { color: var(--typo-color); }

/* Filter Tabs */
.filter-tabs {
    display: flex;
    gap: 4px;
    padding: 14px 20px 0;
    flex-wrap: wrap;
}
.tab-btn {
    padding: 7px 14px;
    border-radius: var(--radius-sm);
    font-size: .82rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border: 1.5px solid var(--border-color);
    transition: all .15s;
}
.tab-btn:hover { border-color: var(--brand-primary); color: var(--brand-primary); }
.tab-btn.active {
    background: var(--brand-primary);
    color: #fff;
    border-color: var(--brand-primary);
}

/* Result Search */
.result-search {
    padding: 12px 20px;
}
.result-search input {
    width: 100%;
    max-width: 360px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    font-size: .87rem;
    transition: border-color .2s;
}
.result-search input:focus {
    outline: none;
    border-color: var(--brand-primary);
}

/* Table */
.table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
.results-table {
    width: 100%;
    border-collapse: collapse;
    font-size: .85rem;
    min-width: 600px;
}
.results-table thead th {
    text-align: left;
    padding: 10px 14px;
    font-size: .75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--text-muted);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}
.results-table tbody tr {
    border-bottom: 1px solid var(--border-color);
    transition: background .1s;
}
.results-table tbody tr:hover { background: var(--bg-secondary); }
.results-table tbody td {
    padding: 10px 14px;
    vertical-align: middle;
    font-size: .84rem;
}
.results-table .email-cell {
    font-family: 'Courier New', monospace;
    font-size: .82rem;
    word-break: break-all;
    max-width: 240px;
}
.results-table .num-cell {
    color: var(--text-muted);
    font-size: .78rem;
    width: 40px;
}

/* Status Badges */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 100px;
    font-size: .75rem;
    font-weight: 700;
    white-space: nowrap;
}
.status-badge.valid      { background: var(--valid-bg);      color: var(--valid-color); }
.status-badge.invalid    { background: var(--invalid-bg);    color: var(--invalid-color); }
.status-badge.disposable { background: var(--disposable-bg); color: var(--disposable-color); }
.status-badge.duplicate  { background: var(--duplicate-bg);  color: var(--duplicate-color); }
.status-badge.typo       { background: var(--typo-bg);       color: var(--typo-color); }

/* MX Cell */
.mx-ok   { color: var(--valid-color);   font-size: .8rem; }
.mx-fail { color: var(--invalid-color); font-size: .8rem; }

/* ---- SHARE SECTION ---- */
.share-section {
    margin-top: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    animation: fadeUp .4s ease;
}
.share-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
}
.share-group, .feedback-group {
    padding: 28px 32px;
}
.feedback-group {
    border-left: 1px solid var(--border-color);
}
.share-group h3, .feedback-group h3 {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 10px;
}
.feedback-group p { color: var(--text-secondary); font-size: .9rem; margin-bottom: 14px; }
.share-btns {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.share-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: .82rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all .2s;
    text-decoration: none;
    white-space: nowrap;
}
.share-btn.twitter  { background: #000; color: #fff; }
.share-btn.linkedin { background: #0A66C2; color: #fff; }
.share-btn.whatsapp { background: #25D366; color: #fff; }
.share-btn.copylink { background: var(--bg-tertiary); color: var(--text-secondary); border: 1.5px solid var(--border-color); }
.share-btn:hover { opacity: .85; transform: translateY(-1px); }

/* ---- FEATURES SECTION ---- */
.features-section {
    padding: 80px 0;
    background: var(--bg-primary);
}
.section-label {
    display: inline-block;
    font-size: .75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .1em;
    color: var(--brand-primary);
    background: rgba(37,99,235,.08);
    padding: 5px 14px;
    border-radius: 100px;
    margin-bottom: 14px;
}
.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 12px;
    line-height: 1.2;
}
.section-sub {
    font-size: .95rem;
    color: var(--text-secondary);
    max-width: 580px;
    margin-bottom: 48px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
}
.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    transition: all .2s;
}
.feature-card:hover {
    border-color: var(--brand-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}
.feature-icon { font-size: 2rem; margin-bottom: 14px; }
.feature-card h3 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}
.feature-card p { font-size: .87rem; color: var(--text-secondary); line-height: 1.6; }

/* ---- HOW IT WORKS ---- */
.how-section {
    padding: 80px 0;
    background: var(--bg-secondary);
}
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    margin-top: 40px;
    position: relative;
}
.step-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    position: relative;
    overflow: hidden;
}
.step-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--brand-gradient);
}
.step-num {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--border-color);
    line-height: 1;
    margin-bottom: 12px;
}
.step-card h3 {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}
.step-card p { font-size: .87rem; color: var(--text-secondary); }

/* ---- CONTENT SECTION ---- */
.content-section {
    padding: 80px 0;
    background: var(--bg-primary);
}
.content-cols {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 48px;
    align-items: start;
}
.content-main h2 {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--text-primary);
}
.content-main h3 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
    margin: 28px 0 10px;
    color: var(--text-primary);
}
.content-main p {
    color: var(--text-secondary);
    line-height: 1.75;
    margin-bottom: 14px;
    font-size: .95rem;
}
.content-main code {
    background: var(--bg-tertiary);
    color: var(--brand-accent);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: .85em;
}

/* Sidebar Widgets */
.content-side { position: sticky; top: calc(var(--nav-height) + 20px); }
.side-widget {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 16px;
}
.side-widget h4 {
    font-family: var(--font-display);
    font-size: .95rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}
.side-widget ul { display: flex; flex-direction: column; gap: 4px; }
.side-widget ul li a {
    font-size: .85rem;
    color: var(--text-secondary);
    display: block;
    padding: 4px 0;
    border-bottom: 1px solid var(--border-color);
    transition: color .15s;
}
.side-widget ul li:last-child a { border-bottom: none; }
.side-widget ul li a:hover { color: var(--brand-primary); }

.reference-list { display: flex; flex-direction: column; gap: 6px !important; }
.reference-list li {
    display: flex !important;
    align-items: center;
    gap: 8px;
    font-size: .84rem;
    color: var(--text-secondary);
    padding: 4px 0 !important;
}

.badge {
    display: inline-flex;
    padding: 2px 8px;
    border-radius: 100px;
    font-size: .72rem;
    font-weight: 700;
    white-space: nowrap;
    flex-shrink: 0;
}
.badge.valid      { background: var(--valid-bg);      color: var(--valid-color); }
.badge.invalid    { background: var(--invalid-bg);    color: var(--invalid-color); }
.badge.disposable { background: var(--disposable-bg); color: var(--disposable-color); }
.badge.duplicate  { background: var(--duplicate-bg);  color: var(--duplicate-color); }
.badge.typo       { background: var(--typo-bg);       color: var(--typo-color); }

.tip-widget { background: linear-gradient(135deg, rgba(37,99,235,.05), rgba(124,58,237,.05)); border-color: rgba(124,58,237,.2); }
.tip-widget p { font-size: .85rem; color: var(--text-secondary); line-height: 1.6; }

/* ---- FAQ ---- */
.faq-section {
    padding: 80px 0;
    background: var(--bg-secondary);
}
.faq-list {
    margin-top: 40px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: 760px;
}
.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color .2s;
}
.faq-item:focus-within, .faq-item.open { border-color: var(--brand-primary); }

.faq-q {
    width: 100%;
    text-align: left;
    padding: 18px 20px;
    font-size: .95rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    background: none;
    transition: background .15s;
}
.faq-q:hover { background: var(--bg-secondary); }
.faq-icon {
    font-size: 1.3rem;
    font-weight: 300;
    color: var(--brand-primary);
    transition: transform .3s;
    flex-shrink: 0;
    line-height: 1;
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height .35s ease, padding .2s;
}
.faq-item.open .faq-a { max-height: 300px; }
.faq-a p {
    padding: 0 20px 18px;
    color: var(--text-secondary);
    font-size: .9rem;
    line-height: 1.7;
}

/* ---- MORE TOOLS ---- */
.more-tools-section {
    padding: 60px 0;
    background: var(--bg-primary);
}
.more-tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 10px;
    margin-top: 36px;
}
.tool-link {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: .84rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all .15s;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.tool-link:hover {
    background: var(--bg-tertiary);
    border-color: var(--brand-primary);
    color: var(--brand-primary);
}

/* ---- CTA SECTION ---- */
.cta-section {
    padding: 80px 0;
    background: var(--bg-secondary);
}
.cta-inner {
    background: var(--brand-gradient);
    border-radius: var(--radius-xl);
    padding: 56px 40px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.cta-inner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none'%3E%3Ccircle cx='20' cy='20' r='1' fill='rgba(255,255,255,0.08)'/%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
}
.cta-inner h2 {
    font-family: var(--font-display);
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    font-weight: 800;
    color: #fff;
    margin-bottom: 12px;
    position: relative;
}
.cta-inner p {
    color: rgba(255,255,255,.85);
    margin-bottom: 28px;
    font-size: .97rem;
    position: relative;
}
.cta-btns {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    position: relative;
}
.cta-btns .btn-primary {
    background: #fff;
    color: var(--brand-primary);
}
.cta-btns .btn-primary:hover { color: var(--brand-accent); }
.cta-btns .btn-secondary {
    background: transparent;
    color: #fff;
    border-color: rgba(255,255,255,.4);
}
.cta-btns .btn-secondary:hover {
    background: rgba(255,255,255,.15);
    border-color: #fff;
    color: #fff;
}

/* ---- DISCLAIMER ---- */
.disclaimer-section {
    background: var(--bg-tertiary);
    border-top: 1px solid var(--border-color);
    padding: 16px 0;
}
.disclaimer-text {
    font-size: .78rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ---- FOOTER ---- */
.site-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 56px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
}
.footer-brand p {
    color: var(--text-muted);
    font-size: .85rem;
    line-height: 1.7;
    margin: 14px 0 16px;
}
.footer-social {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}
.footer-social a {
    font-size: .82rem;
    color: var(--text-muted);
    transition: color .15s;
}
.footer-social a:hover { color: var(--brand-primary); }

.footer-col h4 {
    font-family: var(--font-display);
    font-size: .85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .07em;
    color: var(--text-secondary);
    margin-bottom: 14px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 4px; }
.footer-col ul li a {
    font-size: .84rem;
    color: var(--text-muted);
    transition: color .15s;
    display: block;
    padding: 2px 0;
}
.footer-col ul li a:hover { color: var(--brand-primary); }

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding: 20px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
}
.footer-bottom p {
    font-size: .82rem;
    color: var(--text-muted);
}
.footer-note { font-style: italic; }

/* ---- TOAST ---- */
.toast {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: #1E293B;
    color: #fff;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-size: .88rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transition: all .3s;
    pointer-events: none;
    z-index: 9998;
    white-space: nowrap;
    max-width: calc(100vw - 40px);
}
.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
    .content-cols { grid-template-columns: 1fr; }
    .content-side { position: static; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .share-inner { grid-template-columns: 1fr; }
    .feedback-group { border-left: none; border-top: 1px solid var(--border-color); }
}

@media (max-width: 768px) {
    /* Nav */
    .nav-toggle { display: flex; }
    .nav-menu {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--bg-card);
        flex-direction: column;
        justify-content: flex-start;
        align-items: stretch;
        padding: 20px;
        gap: 8px;
        overflow-y: auto;
        transform: translateX(-100%);
        transition: transform .3s ease;
        z-index: 999;
        border-right: none;
    }
    .nav-menu.open { transform: translateX(0); }
    .nav-list { flex-direction: column; align-items: stretch; width: 100%; }
    .nav-item.has-dropdown .mega-dropdown {
        position: static;
        transform: none;
        min-width: 0;
        width: 100%;
        grid-template-columns: 1fr;
        box-shadow: none;
        border: none;
        padding: 0 0 0 16px;
        background: transparent;
        display: none;
    }
    .nav-item.has-dropdown.open .mega-dropdown { display: grid; }
    .nav-link { padding: 12px 14px; border-radius: var(--radius-sm); }

    /* Sections */
    .hero-section { padding: 56px 0 80px; }
    .stat-sep { display: none; }
    .stat { padding: 8px 16px; }
    .hero-stats { gap: 0; }
    .features-section, .how-section, .content-section,
    .faq-section, .more-tools-section, .cta-section { padding: 56px 0; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
    .share-inner { grid-template-columns: 1fr; }
    .options-bar { padding: 12px 16px 0; }
    .textarea-wrap { padding: 12px 16px; }
    .form-action { padding: 12px 16px 20px; }
    .btn-submit { width: 100%; }
    .result-header { flex-direction: column; align-items: flex-start; }
    .cta-inner { padding: 40px 24px; }
    .summary-grid { grid-template-columns: repeat(3, 1fr); }
    .mega-col { min-width: 0; }
}

@media (max-width: 480px) {
    .footer-grid { grid-template-columns: 1fr; }
    .hero-stats { flex-direction: row; flex-wrap: wrap; justify-content: center; gap: 4px; }
    .stat { flex: 1; min-width: 70px; padding: 8px 10px; }
    .summary-grid { grid-template-columns: repeat(2, 1fr); }
    .filter-tabs { gap: 4px; }
    .tab-btn { font-size: .78rem; padding: 6px 10px; }
    .more-tools-grid { grid-template-columns: 1fr 1fr; }
    .footer-bottom { flex-direction: column; align-items: flex-start; }
    .share-btns { gap: 6px; }
    .share-btn { font-size: .78rem; padding: 7px 12px; }
    .cta-btns { flex-direction: column; align-items: stretch; }
    .cta-btns .btn-primary,
    .cta-btns .btn-secondary { justify-content: center; }
}

/* ---- Focus Styles (Accessibility) ---- */
:focus-visible {
    outline: 2px solid var(--brand-primary);
    outline-offset: 2px;
}

/* ---- Print ---- */
@media print {
    .site-header, .cookie-banner, .hero-section,
    .features-section, .how-section, .cta-section,
    .site-footer, .share-section { display: none; }
    .result-section { box-shadow: none; border: 1px solid #ccc; }
}

/* ---- Reduced Motion ---- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: .01ms !important;
        transition-duration: .01ms !important;
    }
}