:root {
    /* Light theme variables by default */
    --bg: #f8fafc;
    --surface: #ffffff;
    --border: #e2e8f0;
    --text: #0f172a;
    --muted: #64748b;
    --input-bg: #ffffff;
    --blue-primary: #3b5bdb;
    --blue-header: #4a6cf7;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --mono: 'JetBrains Mono', monospace;
    --sans: 'Plus Jakarta Sans', sans-serif;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.05);
    --radius: 12px;
}

[data-theme="dark"] {
    --bg: #0f172a;
    --surface: #1e293b;
    --border: #334155;
    --text: #f8fafc;
    --muted: #94a3b8;
    --input-bg: #0f172a;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
}

*, *::before, *::after {
    box-sizing: border-box;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    min-height: 100vh;
    padding: 0 0 3rem 0;
    transition: background-color 0.3s, color 0.3s;
}

.top-nav {
    position: relative;
    z-index: 1000;
    background-color: var(--blue-primary);
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 52px;
    box-shadow: 0 2px 8px rgba(59,91,219,0.3);
}

.top-nav .brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: white;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.3px;
}

.top-nav .brand img {
    height: 34px;
    width: auto;
    object-fit: contain;
    display: block;
}

.nav-toggle {
    display: none;
    background: transparent;
    border: none;
    color: white;
    font-size: 20px;
    cursor: pointer;
    padding: 8px;
    transition: opacity 0.2s;
}

.nav-collapse {
    display: flex;
    align-items: center;
    flex: 1;
    justify-content: space-between;
}

.top-nav-menu {
    display: flex;
    align-items: center;
    gap: 24px;
    margin: 0 auto 0 40px;
}

.menu-item {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.menu-item:hover {
    color: #ffffff;
    transform: translateY(-1px);
}

@media (max-width: 991px) {
    .top-nav {
        height: auto;
        min-height: 60px;
        padding: 10px 16px;
        display: grid;
        grid-template-columns: 1fr auto 1fr;
        grid-template-rows: auto;
        align-items: center;
        row-gap: 8px;
    }
    .brand {
        grid-column: 2;
        grid-row: 1;
        justify-self: center;
    }
    .nav-actions {
        grid-column: 3;
        grid-row: 1;
        justify-self: end;
    }
    .nav-toggle {
        grid-column: 1;
        grid-row: 1;
        justify-self: start;
        display: block;
        margin-top: 0;
    }
    .nav-collapse {
        grid-column: 1 / span 3;
        grid-row: 2;
        position: static;
        width: 100%;
        display: none;
        background: rgba(255, 255, 255, 0.05);
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-radius: 8px;
        padding: 16px;
        gap: 16px;
        margin-top: 4px;
    }
    .nav-collapse.show {
        display: flex;
    }
    .top-nav-menu {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        margin: 0;
        gap: 16px;
        width: 100%;
    }
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.theme-toggle {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    padding: 6px 12px;
    border-radius: 50px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.25s ease;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
}

.user-info-box {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    padding: 4px 12px;
    border-radius: 50px;
    color: white;
    backdrop-filter: blur(5px);
    transition: all 0.3s ease;
}

.user-name {
    font-weight: 700;
    font-size: 13px;
}

.user-balance {
    font-size: 11px;
    font-weight: 600;
    color: #a3fa5c;
}

.logout-btn {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    font-size: 11px;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 50px;
    background: rgba(250, 82, 82, 0.2);
    border: 1px solid rgba(250, 82, 82, 0.3);
    transition: all 0.2s ease;
}

.logout-btn:hover {
    color: white;
    background: rgba(250, 82, 82, 0.75);
    border-color: rgba(250, 82, 82, 0.85);
}

.wrap {
    max-width: 1000px;
    margin: 0 auto;
    padding: 30px 16px;
}

.header {
    margin-bottom: 0.5rem;
}

.badge-live {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--blue-primary);
    border: 1px solid rgba(74, 108, 247, 0.25);
    padding: 4px 12px;
    border-radius: 50px;
    background: rgba(74, 108, 247, 0.05);
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    display: inline-flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

h1 img {
    height: 32px !important;
    width: auto;
    object-fit: contain;
    vertical-align: middle;
}

h1 span {
    background: linear-gradient(135deg, var(--blue-primary), var(--blue-header));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--blue-primary);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(74, 108, 247, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(74, 108, 247, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(74, 108, 247, 0); }
}

@media (max-width: 768px) {
    .top-nav .brand-text {
        display: none;
    }
    h1 {
        font-size: clamp(1.1rem, 3.8vw, 1.4rem);
        justify-content: center;
        flex-wrap: nowrap;
    }
    h1 img {
        height: 26px !important;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: clamp(0.75rem, 3.4vw, 0.95rem) !important;
        gap: 6px;
        white-space: nowrap;
        letter-spacing: -0.3px;
    }
    h1 img {
        height: 20px !important;
    }
    .badge-dot {
        width: 6px;
        height: 6px;
    }
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    padding: 24px;
    margin-bottom: 24px;
    position: relative;
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s, background-color 0.3s, border-color 0.3s;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--blue-header), var(--blue-primary), transparent);
}

label {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.8px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 8px;
}

.line-count-badge {
    font-size: 11px;
    color: var(--blue-primary);
    font-weight: 600;
    background: rgba(74, 108, 247, 0.08);
    border: 1px solid rgba(74, 108, 247, 0.15);
    padding: 4px 12px;
    border-radius: 50px;
}

/* Textarea structure matching tool-get-Oauth2-token */
.editor-wrap {
    display: flex;
    border: 1.5px solid rgba(74, 108, 247, 0.3); /* Prominent primary-tinted border */
    border-radius: 10px;
    overflow: hidden;
    background: var(--input-bg);
    height: 280px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 8px rgba(74, 108, 247, 0.04);
}
.editor-wrap:hover {
    border-color: rgba(74, 108, 247, 0.6);
    box-shadow: 0 4px 16px rgba(74, 108, 247, 0.1);
}
.editor-wrap:focus-within {
    border-color: var(--blue-primary);
    box-shadow: 0 0 0 4px rgba(74, 108, 247, 0.25), 0 8px 24px rgba(74, 108, 247, 0.15);
    transform: translateY(-1px);
}

.line-nums {
    white-space: pre; /* Keep newlines intact so numbers align vertically */
    padding: 14px 0;
    min-width: 44px;
    text-align: right;
    padding-right: 12px;
    background: var(--bg);
    color: var(--muted);
    font-size: 12px;
    line-height: 1.7;
    user-select: none;
    pointer-events: none;
    overflow: hidden;
    font-family: var(--mono);
    border-right: 1px solid var(--border);
}

#mailInput {
    flex: 1;
    background: var(--input-bg);
    color: var(--text);
    border: none;
    outline: none;
    padding: 14px;
    font-family: var(--mono);
    font-size: 13px;
    line-height: 1.7;
    resize: none;
    overflow-y: auto;
}
#mailInput::placeholder {
    color: var(--muted);
    opacity: 0.6;
}

.btn-primary-custom {
    background: linear-gradient(135deg, var(--blue-primary), var(--blue-header));
    border: none;
    color: white;
    font-weight: 700;
    padding: 12px 24px;
    border-radius: 8px;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
}

.btn-primary-custom:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(74, 108, 247, 0.35);
}

.btn-primary-custom:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-clear {
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--text);
    font-weight: 600;
    padding: 12px 20px;
    border-radius: 8px;
    transition: all 0.2s;
}

.btn-clear:hover {
    border-color: var(--danger);
    color: var(--danger);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(135px, 1fr));
    gap: 10px;
    margin-top: 10px;
}

.stat-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 8px;
    text-align: center;
    box-shadow: none;
    margin-bottom: 0;
}
.stat-card::before {
    display: none;
}

.stat-val {
    font-size: 1.3rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 2px;
    cursor: pointer;
    position: relative;
    display: inline-block;
    transition: opacity 0.15s ease, transform 0.15s ease;
    user-select: none;
}

.stat-val:hover {
    opacity: 0.8;
    transform: scale(1.06);
}

.stat-val:active {
    transform: scale(0.96);
    opacity: 0.6;
}

/* Tooltip "Click vào để copy" */
.stat-val::after {
    content: 'Click vào để copy';
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) scale(0.85);
    background: rgba(15, 23, 42, 0.92);
    color: #fff;
    font-size: 10px;
    font-weight: 600;
    white-space: nowrap;
    padding: 4px 9px;
    border-radius: 5px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s ease, transform 0.2s ease;
    z-index: 10;
}

.stat-val:hover::after {
    opacity: 1;
    transform: translateX(-50%) scale(1);
}

.stat-lbl {
    font-size: 10px;
    text-transform: uppercase;
    font-weight: 700;
    color: var(--muted);
    margin-top: 4px;
    letter-spacing: 0.5px;
}

.result-box {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px 20px;
    font-size: 13px;
    display: none;
    gap: 24px;
    flex-wrap: wrap;
    margin-top: 20px;
}
.result-box.show {
    display: flex;
}

.result-item {
    display: flex;
    align-items: center;
    gap: 12px;
}
.result-item .rv {
    font-size: 1.5rem;
    font-weight: 700;
}
.result-item.ri-ok .rv { color: var(--success); }
.result-item.ri-dup .rv { color: var(--warning); }
.result-item.ri-tot .rv { color: var(--blue-primary); }
.result-item .rl {
    font-size: 10px;
    text-transform: uppercase;
    font-weight: 700;
    color: var(--muted);
}

/* Login styling matching tool-get-Oauth2-token */
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    padding: 24px;
}

.login-box {
    width: 100%;
    max-width: 420px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    position: relative;
}

.login-box::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; height: 4px;
    background: linear-gradient(90deg, var(--blue-header), var(--blue-primary));
}

.login-head {
    padding: 32px 32px 16px 32px;
    text-align: center;
}

.login-head .brand {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--blue-primary);
    margin-bottom: 8px;
}

.login-head h1 {
    font-size: 24px;
    font-weight: 800;
    color: var(--text);
}

.login-body {
    padding: 0 32px 32px 32px;
}

.field {
    margin-bottom: 20px;
}

.field label {
    display: block;
    font-size: 10px;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 6px;
    font-weight: 700;
}

.field input {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--border);
    padding: 12px 14px;
    font-family: var(--mono);
    font-size: 13px;
    color: var(--text);
    outline: none;
    transition: all 0.2s;
    border-radius: 8px;
}
.field input:focus {
    border-color: var(--blue-primary);
    box-shadow: 0 0 0 3px rgba(74, 108, 247, 0.15);
}

.remember-row {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--muted);
    margin-bottom: 24px;
    cursor: pointer;
    user-select: none;
}
.remember-row input[type=checkbox] {
    accent-color: var(--blue-primary);
    width: 16px;
    height: 16px;
}

.login-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: var(--danger);
    padding: 12px 16px;
    font-size: 12px;
    border-radius: 8px;
    margin-bottom: 18px;
    display: none;
    font-weight: 600;
}

.toast-msg {
    position: fixed;
    bottom: 24px;
    left: 24px;
    background: rgba(15, 23, 42, 0.95);
    color: white;
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
    z-index: 9999;
    display: flex;
    align-items: center;
    gap: 8px;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
}

.toast-msg.show {
    opacity: 1;
    transform: translateY(0);
}

/* ── COPY SUCCESS BANNER ── */
@keyframes copyBannerIn {
    from { opacity: 0; transform: translateX(-50%) translateY(-24px) scale(0.92); }
    to   { opacity: 1; transform: translateX(-50%) translateY(0)     scale(1); }
}
@keyframes copyBannerOut {
    from { opacity: 1; transform: translateX(-50%) translateY(0)     scale(1); }
    to   { opacity: 0; transform: translateX(-50%) translateY(-16px) scale(0.95); }
}
@keyframes copyProgress {
    from { width: 100%; }
    to   { width: 0%; }
}

.copy-banner {
    position: fixed;
    top: 68px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10000;
    display: none;
    flex-direction: column;
    min-width: 300px;
    max-width: 480px;
    background: linear-gradient(135deg, rgba(16,185,129,0.97), rgba(5,150,105,0.97));
    color: #fff;
    border-radius: 14px;
    box-shadow: 0 16px 48px rgba(16,185,129,0.35), 0 4px 12px rgba(0,0,0,0.15);
    overflow: hidden;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
}

.copy-banner.show {
    display: flex;
    animation: copyBannerIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

.copy-banner.hiding {
    animation: copyBannerOut 0.3s ease-in forwards;
}

.copy-banner-body {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px 12px 20px;
}

.copy-banner-icon {
    width: 40px;
    height: 40px;
    min-width: 40px;
    border-radius: 50%;
    background: rgba(255,255,255,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.copy-banner-content {
    flex: 1;
}

.copy-banner-title {
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.3px;
    line-height: 1.3;
}

.copy-banner-sub {
    font-size: 11px;
    font-weight: 500;
    opacity: 0.85;
    margin-top: 2px;
}

.copy-banner-close {
    background: none;
    border: none;
    color: rgba(255,255,255,0.75);
    font-size: 16px;
    cursor: pointer;
    padding: 0 4px;
    line-height: 1;
    transition: color 0.15s;
    align-self: flex-start;
}
.copy-banner-close:hover { color: #fff; }

.copy-banner-progress {
    height: 3px;
    background: rgba(255,255,255,0.3);
    margin: 0 20px 10px 20px;
    border-radius: 2px;
    overflow: hidden;
}

.copy-banner-progress-bar {
    height: 100%;
    background: rgba(255,255,255,0.85);
    border-radius: 2px;
    width: 100%;
}

.footer-banner {
    margin-top: 2rem;
    text-align: center;
    font-size: 11px;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}
.footer-banner a {
    color: var(--blue-primary);
    text-decoration: none;
    font-weight: 700;
}

.spinner-overlay {
    position: fixed;
    inset: 0;
    z-index: 5000;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
}
.spinner-overlay.show {
    display: flex;
}
.spin-big {
    width: 44px;
    height: 44px;
    border: 3px solid rgba(255,255,255,0.2);
    border-top-color: var(--blue-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
/* Styles for Request History Tab and Table */
.tabs-nav {
    display: flex;
    gap: 8px;
    border-bottom: 2px solid var(--border);
    padding-bottom: 8px;
    margin-bottom: 20px;
}
.tab-btn {
    background: none;
    border: none;
    color: var(--muted);
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}
.tab-btn:hover {
    color: var(--text);
    background: rgba(74, 108, 247, 0.05);
}
.tab-btn.active {
    color: white !important;
    background: linear-gradient(135deg, var(--blue-primary), var(--blue-header));
    box-shadow: 0 4px 10px rgba(74, 108, 247, 0.2);
}

.history-table-container {
    width: 100%;
    overflow-x: auto;
}
.history-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}
.history-table th, .history-table td {
    padding: 10px 8px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}
.history-table th {
    font-weight: 700;
    color: var(--muted);
    text-transform: uppercase;
    font-size: 10px;
    letter-spacing: 0.8px;
    background: rgba(74, 108, 247, 0.03);
}
.history-table tr:hover td {
    background: rgba(74, 108, 247, 0.02);
}
.history-table td {
    font-weight: 600;
    color: var(--text);
}
.history-badge {
    font-size: 11px;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 4px;
    font-family: var(--mono);
    display: inline-block;
}
.history-badge.total { background: rgba(74, 108, 247, 0.1); color: var(--blue-primary); }
.history-badge.success { background: rgba(43, 138, 62, 0.1); color: var(--success); }
.history-badge.blocked { background: rgba(224, 49, 49, 0.1); color: var(--danger); }
.history-badge.duplicate { background: rgba(247, 103, 7, 0.1); color: var(--warning); }
.history-badge.pending { background: rgba(21, 170, 191, 0.1); color: var(--info); }

.empty-history {
    padding: 40px;
    text-align: center;
    color: var(--muted);
    font-weight: 600;
}

/* Styles for Load More & Delete Actions */
.btn-load-more-container {
    text-align: center;
    margin-top: 15px;
}
.btn-load-more {
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--text);
    font-weight: 700;
    padding: 8px 20px;
    border-radius: 8px;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.btn-load-more:hover {
    border-color: var(--blue-primary);
    color: var(--blue-primary);
    box-shadow: 0 4px 12px rgba(74, 108, 247, 0.1);
}

.btn-delete-history {
    background: none;
    border: none;
    color: var(--danger);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 14px;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.btn-delete-history:hover {
    background: rgba(224, 49, 49, 0.08);
    color: #ff6b6b;
    transform: scale(1.08);
}

/* Custom premium modal popup */
.custom-modal {
    position: fixed;
    inset: 0;
    z-index: 6000;
    display: none;
    align-items: center;
    justify-content: center;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    padding: 20px;
}
.custom-modal.show {
    display: flex;
}
.modal-dialog-custom {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    width: 100%;
    max-width: 550px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: modalSlideUp 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
@keyframes modalSlideUp {
    from { transform: translateY(30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}
.modal-header-custom {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(239, 68, 68, 0.03);
}
.modal-header-custom h5 {
    font-size: 16px;
    font-weight: 800;
    color: var(--danger);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 8px;
}
.modal-close-custom {
    background: none;
    border: none;
    color: var(--muted);
    font-size: 18px;
    cursor: pointer;
    transition: all 0.2s;
}
.modal-close-custom:hover {
    color: var(--text);
    transform: scale(1.1);
}
.modal-body-custom {
    padding: 20px;
    max-height: 400px;
    overflow-y: auto;
}
.invalid-list-container {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px 14px;
    font-family: var(--mono);
    font-size: 12px;
    color: var(--danger);
    max-height: 200px;
    overflow-y: auto;
    white-space: pre-wrap;
    margin-bottom: 16px;
    line-height: 1.6;
}
.modal-footer-custom {
    padding: 14px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}
.btn-download-txt {
    background: var(--blue-primary);
    color: white;
    border: none;
    font-weight: 700;
    font-size: 12px;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s;
    text-decoration: none;
}
.btn-download-txt:hover {
    background: var(--blue-header);
    box-shadow: 0 4px 10px rgba(74, 108, 247, 0.2);
    color: white;
}
.btn-close-modal {
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    font-weight: 700;
    font-size: 12px;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}
.btn-close-modal:hover {
    border-color: var(--muted);
}
.invalid-explanation-panel {
    background: rgba(245, 158, 11, 0.05);
    border: 1px solid rgba(245, 158, 11, 0.15);
    border-radius: 8px;
    padding: 12px 14px;
    font-size: 12px;
    color: var(--text);
}
.invalid-explanation-panel p {
    margin: 0 0 8px 0;
    font-weight: 700;
    color: var(--warning);
}
.invalid-explanation-panel ul {
    margin: 0;
    padding-left: 18px;
}
.invalid-explanation-panel li {
    margin-bottom: 4px;
}

/* Select country style */
.select-custom {
    cursor: pointer;
    background-color: var(--input-bg);
    border: 1.5px solid rgba(74, 108, 247, 0.3);
    color: var(--text);
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 13px;
    outline: none;
    box-shadow: none;
    transition: all 0.2s;
}
.select-custom:hover {
    border-color: rgba(74, 108, 247, 0.6);
}
.select-custom:focus {
    border-color: var(--blue-primary);
    box-shadow: 0 0 0 3px rgba(74, 108, 247, 0.25);
}
[data-theme="dark"] .form-select {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23f8fafc' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");
}

/* Stats Card Action Buttons */
.stat-btn {
    position: absolute;
    right: 6px;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    transition: all 0.2s;
    text-decoration: none;
    border: none;
    padding: 0;
    cursor: pointer;
}
.stat-btn-download {
    top: 6px;
}
.stat-btn-delete {
    top: 32px;
}
.stat-btn-reload {
    right: 32px;
    top: 6px;
}

/* Color schemes for stats buttons */
.stat-btn-primary {
    background: rgba(74, 108, 247, 0.1);
    color: var(--blue-primary);
}
.stat-btn-primary:hover {
    background: var(--blue-primary);
    color: #fff;
}
.stat-btn-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}
.stat-btn-success:hover {
    background: var(--success);
    color: #fff;
}
.stat-btn-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}
.stat-btn-danger:hover {
    background: var(--danger);
    color: #fff;
}
.stat-btn-warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
}
.stat-btn-warning:hover {
    background: var(--warning);
    color: #fff;
}
.stat-btn-indigo {
    background: rgba(79, 70, 229, 0.1);
    color: #4f46e5;
}
.stat-btn-indigo:hover {
    background: #4f46e5;
    color: #fff;
}

/* Responsive optimizations for smartphone */
@media (max-width: 576px) {
    /* Top nav scaling */
    .top-nav {
        padding: 8px 12px !important;
    }
    .theme-toggle {
        padding: 6px 8px !important;
        font-size: 12px !important;
    }
    .user-info-box {
        gap: 6px !important;
        padding: 4px 8px !important;
    }
    .user-name {
        max-width: 65px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    .logout-btn {
        padding: 3px 6px !important;
    }
    .logout-text {
        display: none !important;
    }
    
    /* Layout wrap padding */
    .wrap {
        padding: 16px 12px !important;
    }
    
    /* Header title responsive */
    h1 {
        font-size: 1.25rem !important;
        flex-wrap: wrap;
        justify-content: center;
        text-align: center;
        gap: 6px !important;
    }
    h1 img {
        height: 24px !important;
    }
    
    /* Stats grid */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 8px !important;
    }
    .stat-card {
        padding: 10px 6px !important;
    }
    .stat-val {
        font-size: 1.1rem !important;
    }
    .stat-lbl {
        font-size: 8.5px !important;
        letter-spacing: 0.2px !important;
    }
    .stat-btn {
        width: 18px !important;
        height: 18px !important;
        font-size: 9px !important;
        right: 4px !important;
    }
    .stat-btn-download {
        top: 4px !important;
    }
    .stat-btn-delete {
        top: 24px !important;
    }

    /* Tabs nav */
    .tabs-nav {
        gap: 4px !important;
    }
    .tab-btn {
        flex: 1;
        justify-content: center;
        padding: 8px 4px !important;
        font-size: 11px !important;
    }

    /* Editor header (label & badges) */
    .editor-header {
        flex-direction: column !important;
        align-items: flex-start !important;
        gap: 8px !important;
    }
    .editor-title-wrap {
        width: 100%;
    }
    .editor-badges {
        width: 100%;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    /* Input zoom & textarea styling */
    #mailInput, .field input, .select-custom {
        font-size: 16px !important; /* Prevents auto-zoom on iOS */
    }
    .editor-wrap {
        height: 220px !important; /* Slightly more compact on mobile */
    }
    .line-nums {
        min-width: 36px !important;
        padding-right: 8px !important;
        font-size: 11px !important;
    }

    /* Action buttons */
    .editor-actions {
        flex-direction: column !important;
        align-items: stretch !important;
        gap: 8px !important;
    }
    .editor-actions button {
        width: 100% !important;
        justify-content: center;
        padding: 10px 16px !important;
    }

    /* Result box grid */
    .result-box {
        display: grid !important;
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 12px 8px !important;
        padding: 12px !important;
    }
    .result-item {
        gap: 8px !important;
    }
    .result-item .rv {
        font-size: 1.25rem !important;
    }
    .result-item .rl {
        font-size: 9px !important;
    }
}