/* ═══════════════════════════════════════════════════════
   Shop Huy — Redeem CDK
   ─────────────────────
   Theme: Light/Dark with CSS custom properties
   Brand: Gradient #fff7ae → #feaaf9
   ═══════════════════════════════════════════════════════ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Theme Variables ── */
:root,
[data-theme="light"] {
    --bg-gradient-1: #fff7ae;
    --bg-gradient-2: #feaaf9;
    --bg-body: #faf8f5;
    --bg-card: rgba(255, 255, 255, 0.72);
    --bg-card-hover: rgba(255, 255, 255, 0.88);
    --bg-input: rgba(255, 255, 255, 0.8);
    --bg-input-focus: #ffffff;
    --bg-nav: rgba(255, 255, 255, 0.6);
    --bg-nav-item: transparent;
    --bg-nav-item-active: rgba(0, 0, 0, 0.06);
    --bg-lang-btn: rgba(0, 0, 0, 0.04);
    --bg-lang-btn-active: rgba(0, 0, 0, 0.1);
    --bg-step-locked: rgba(0, 0, 0, 0.02);
    --text-primary: #1a1a2e;
    --text-secondary: #5a5a7a;
    --text-muted: #8888a8;
    --border-color: rgba(0, 0, 0, 0.08);
    --border-input: rgba(0, 0, 0, 0.12);
    --border-input-focus: #c084fc;
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.06), 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-card-hover: 0 12px 48px rgba(0, 0, 0, 0.1), 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-btn: 0 4px 16px rgba(168, 85, 247, 0.3);
    --btn-gradient-1: #c084fc;
    --btn-gradient-2: #f472b6;
    --btn-text: #ffffff;
    --error-bg: #fef2f2;
    --error-text: #dc2626;
    --error-border: #fecaca;
    --success-bg: #f0fdf4;
    --success-text: #16a34a;
    --success-border: #bbf7d0;
    --warning-bg: #fffbeb;
    --warning-text: #d97706;
    --warning-border: #fde68a;
    --info-bg: rgba(255, 255, 255, 0.5);
    --status-available: #16a34a;
    --status-used: #d97706;
    --status-expired: #dc2626;
    --instr-bg: rgba(168, 85, 247, 0.06);
    --instr-border: rgba(168, 85, 247, 0.12);
    --spinner-color: #ffffff;
    --backdrop-blur: 16px;
    --step-number-bg: linear-gradient(135deg, var(--btn-gradient-1), var(--btn-gradient-2));
}

[data-theme="dark"] {
    --bg-gradient-1: #2d2a10;
    --bg-gradient-2: #2e1a2e;
    --bg-body: #0f0f17;
    --bg-card: rgba(30, 30, 48, 0.72);
    --bg-card-hover: rgba(38, 38, 58, 0.88);
    --bg-input: rgba(255, 255, 255, 0.06);
    --bg-input-focus: rgba(255, 255, 255, 0.1);
    --bg-nav: rgba(20, 20, 35, 0.7);
    --bg-nav-item: transparent;
    --bg-nav-item-active: rgba(255, 255, 255, 0.08);
    --bg-lang-btn: rgba(255, 255, 255, 0.06);
    --bg-lang-btn-active: rgba(255, 255, 255, 0.15);
    --bg-step-locked: rgba(255, 255, 255, 0.02);
    --text-primary: #f0f0f5;
    --text-secondary: #a0a0c0;
    --text-muted: #6a6a8a;
    --border-color: rgba(255, 255, 255, 0.06);
    --border-input: rgba(255, 255, 255, 0.1);
    --border-input-focus: #a855f7;
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3), 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-card-hover: 0 12px 48px rgba(0, 0, 0, 0.4), 0 4px 12px rgba(0, 0, 0, 0.25);
    --shadow-btn: 0 4px 16px rgba(168, 85, 247, 0.4);
    --btn-gradient-1: #a855f7;
    --btn-gradient-2: #ec4899;
    --btn-text: #ffffff;
    --error-bg: rgba(220, 38, 38, 0.12);
    --error-text: #f87171;
    --error-border: rgba(220, 38, 38, 0.25);
    --success-bg: rgba(22, 163, 74, 0.12);
    --success-text: #4ade80;
    --success-border: rgba(22, 163, 74, 0.25);
    --warning-bg: rgba(217, 119, 6, 0.12);
    --warning-text: #fbbf24;
    --warning-border: rgba(217, 119, 6, 0.25);
    --info-bg: rgba(255, 255, 255, 0.04);
    --status-available: #4ade80;
    --status-used: #fbbf24;
    --status-expired: #f87171;
    --instr-bg: rgba(168, 85, 247, 0.08);
    --instr-border: rgba(168, 85, 247, 0.18);
    --spinner-color: #ffffff;
}

/* ── Body ── */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    background: var(--bg-body);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

.bg-gradient {
    position: fixed; inset: 0; z-index: 0; pointer-events: none;
}
.bg-gradient::before, .bg-gradient::after {
    content: ''; position: absolute; border-radius: 50%; filter: blur(120px); opacity: 0.45;
}
.bg-gradient::before {
    width: 600px; height: 600px; background: var(--bg-gradient-1); top: -10%; left: -5%;
}
.bg-gradient::after {
    width: 500px; height: 500px; background: var(--bg-gradient-2); bottom: -10%; right: -5%;
}

/* ── Layout ── */
.wrapper {
    position: relative; z-index: 1; min-height: 100vh;
    display: flex; flex-direction: column;
}
.main-content {
    flex: 1; display: flex; align-items: flex-start; justify-content: center;
    padding: 1.5rem 1rem 3rem;
}

/* ── Header ── */
.site-header {
    padding: 0.8rem 1.5rem;
    display: flex; align-items: center; justify-content: space-between; gap: 0.8rem;
    position: relative; z-index: 10;
}
.header-left {
    display: flex; align-items: center; gap: 1rem;
}
.logo-link {
    display: flex; align-items: center; gap: 0.6rem;
    text-decoration: none; color: var(--text-primary);
}
.logo-img {
    width: 38px; height: 38px; border-radius: 10px; object-fit: cover;
}
.logo-text {
    font-size: 1rem; font-weight: 700; letter-spacing: -0.01em; white-space: nowrap;
    background: linear-gradient(135deg, var(--btn-gradient-1), var(--btn-gradient-2));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

.nav-tabs {
    display: flex; gap: 0.25rem;
    background: var(--bg-nav);
    backdrop-filter: blur(var(--backdrop-blur)); -webkit-backdrop-filter: blur(var(--backdrop-blur));
    border-radius: 10px; padding: 3px; border: 1px solid var(--border-color);
}
.nav-tab {
    display: inline-flex; align-items: center; gap: 0.4rem;
    padding: 0.5rem 1rem; border-radius: 7px;
    text-decoration: none; font-size: 0.84rem; font-weight: 500;
    color: var(--text-secondary); background: transparent;
    transition: all 0.2s ease; white-space: nowrap;
}
.nav-tab:hover { color: var(--text-primary); background: var(--bg-nav-item-active); }
.nav-tab.active { color: var(--text-primary); background: var(--bg-nav-item-active); font-weight: 600; }
.nav-tab svg { width: 15px; height: 15px; flex-shrink: 0; }

.header-controls { display: flex; align-items: center; gap: 0.4rem; }

/* ── Lang Picker (dropdown) ── */
.lang-picker {
    position: relative;
}
.lang-current {
    display: flex; align-items: center; gap: 0.4rem;
    padding: 0.38rem 0.7rem; border: 1px solid var(--border-color);
    border-radius: 8px; background: var(--bg-nav);
    backdrop-filter: blur(var(--backdrop-blur)); -webkit-backdrop-filter: blur(var(--backdrop-blur));
    cursor: pointer; font-size: 0.82rem; font-weight: 500;
    color: var(--text-secondary); transition: all 0.2s ease;
    white-space: nowrap; font-family: inherit;
}
.lang-current:hover { border-color: var(--border-input); color: var(--text-primary); }
.lang-flag { font-size: 1.05rem; line-height: 1; }
.lang-label { font-size: 0.82rem; }
.lang-chevron {
    width: 12px; height: 12px; opacity: 0.5; transition: transform 0.2s ease;
}
.lang-picker.open .lang-chevron { transform: rotate(180deg); }

.lang-dropdown {
    position: absolute; top: calc(100% + 6px); right: 0;
    min-width: 170px; padding: 4px;
    background: var(--bg-card); border: 1px solid var(--border-color);
    border-radius: 10px; box-shadow: var(--shadow-card);
    backdrop-filter: blur(var(--backdrop-blur)); -webkit-backdrop-filter: blur(var(--backdrop-blur));
    opacity: 0; visibility: hidden; transform: translateY(-6px);
    transition: all 0.18s ease; z-index: 100;
}
.lang-picker.open .lang-dropdown {
    opacity: 1; visibility: visible; transform: translateY(0);
}
.lang-option {
    display: flex; align-items: center; gap: 0.5rem;
    padding: 0.5rem 0.65rem; border-radius: 7px; border: none;
    background: transparent; width: 100%; text-align: left;
    cursor: pointer; font-size: 0.84rem; font-weight: 500;
    color: var(--text-secondary); transition: all 0.12s ease;
    font-family: inherit;
}
.lang-option:hover { background: var(--bg-nav-item-active); color: var(--text-primary); }
.lang-option.active {
    background: var(--bg-nav-item-active); color: var(--text-primary); font-weight: 600;
}
.lang-option .lang-name { flex: 1; }
.lang-option .lang-check { opacity: 0; width: 14px; height: 14px; color: var(--btn-gradient-1); }
.lang-option.active .lang-check { opacity: 1; }

/* ── Theme Toggle ── */
.theme-toggle {
    width: 34px; height: 34px;
    display: flex; align-items: center; justify-content: center;
    border: 1px solid var(--border-color); border-radius: 8px;
    background: var(--bg-nav);
    backdrop-filter: blur(var(--backdrop-blur)); -webkit-backdrop-filter: blur(var(--backdrop-blur));
    color: var(--text-secondary); cursor: pointer; transition: all 0.2s ease;
}
.theme-toggle:hover { color: var(--text-primary); background: var(--bg-card-hover); }
.theme-toggle svg { width: 17px; height: 17px; }

/* ── Card ── */
.card {
    width: 100%; max-width: 560px;
}
.card-wide {
    max-width: 860px;
}
.card,
.card-wide {
    background: var(--bg-card);
    backdrop-filter: blur(var(--backdrop-blur)); -webkit-backdrop-filter: blur(var(--backdrop-blur));
    border: 1px solid var(--border-color); border-radius: 20px;
    padding: 2rem 2.2rem; box-shadow: var(--shadow-card);
    transition: box-shadow 0.3s ease; animation: fadeUp 0.5s ease both;
}

.card-header {
    text-align: center; margin-bottom: 1.8rem;
}
.card-title {
    font-size: 1.5rem; font-weight: 700; margin-bottom: 0.3rem; letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--btn-gradient-1), var(--btn-gradient-2));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.card-subtitle {
    font-size: 0.88rem; color: var(--text-secondary);
}

/* ── Steps ── */
.step {
    padding: 1.25rem; border: 1px solid var(--border-color);
    border-radius: 14px; margin-bottom: 1rem;
    transition: all 0.3s ease; animation: fadeUp 0.4s ease both;
}
.step:last-child { margin-bottom: 0; }

.step-locked {
    pointer-events: none;
    background: var(--bg-step-locked);
    filter: grayscale(0.5) blur(0.5px);
    opacity: 0.38;
    position: relative;
}
.step-locked::after {
    content: ''; position: absolute; inset: 0;
    border-radius: inherit;
    background: repeating-linear-gradient(
        -45deg,
        transparent, transparent 8px,
        rgba(128,128,128,0.04) 8px, rgba(128,128,128,0.04) 16px
    );
    pointer-events: none;
}
.step-locked .link-buttons { pointer-events: auto; filter: none; opacity: 1; }
.step-locked .btn-link { pointer-events: auto; filter: none; opacity: 1; }
.step-active {
    pointer-events: auto;
    animation: stepUnlock 0.4s ease both;
}

.step-title {
    font-size: 0.95rem; font-weight: 700; color: var(--text-primary);
    margin-bottom: 0.8rem; display: flex; align-items: center; gap: 0.5rem;
}
.step-number {
    display: inline-flex; align-items: center; justify-content: center;
    width: 24px; height: 24px; border-radius: 50%; font-size: 0.75rem;
    font-weight: 700; color: #fff; background: var(--step-number-bg); flex-shrink: 0;
}

/* ── Form Elements ── */
.form-group { margin-bottom: 1rem; }

.form-input {
    width: 100%; padding: 0.7rem 0.9rem;
    background: var(--bg-input); border: 1.5px solid var(--border-input);
    border-radius: 9px; color: var(--text-primary);
    font-size: 0.9rem; font-family: inherit;
    transition: all 0.2s ease; outline: none;
}
.form-input:focus {
    border-color: var(--border-input-focus); background: var(--bg-input-focus);
    box-shadow: 0 0 0 3px rgba(168, 132, 252, 0.15);
}
.form-input::placeholder { color: var(--text-muted); }
.form-input:disabled { opacity: 0.6; cursor: not-allowed; }

textarea.form-input { resize: vertical; min-height: 80px; line-height: 1.5; font-size: 0.82rem; }

/* ── Instructions ── */
.instructions {
    background: var(--instr-bg); border: 1px solid var(--instr-border);
    border-radius: 10px; padding: 0.9rem 1rem; margin-bottom: 1rem;
}
.instructions p {
    font-size: 0.84rem; color: var(--text-secondary); margin-bottom: 0.25rem; line-height: 1.6;
}
.instructions p:last-child { margin-bottom: 0; }

.link-buttons {
    display: flex; gap: 0.5rem; margin: 0.8rem 0; flex-wrap: wrap;
}
.btn-link {
    display: inline-flex; align-items: center; gap: 0.4rem;
    padding: 0.5rem 1rem; border-radius: 8px;
    font-size: 0.82rem; font-weight: 600; text-decoration: none;
    border: 1.5px solid var(--border-input); color: var(--text-primary);
    background: var(--bg-input); transition: all 0.2s ease;
}
.btn-link:hover {
    border-color: var(--border-input-focus); background: var(--bg-input-focus);
    box-shadow: 0 0 0 3px rgba(168, 132, 252, 0.1);
}
.btn-link svg { width: 14px; height: 14px; }

/* ── Buttons ── */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
    padding: 0.7rem 1.3rem; border: none; border-radius: 9px;
    font-size: 0.9rem; font-weight: 600; font-family: inherit;
    cursor: pointer; transition: all 0.25s ease; text-decoration: none;
}
.btn-primary {
    width: 100%;
    background: linear-gradient(135deg, var(--btn-gradient-1), var(--btn-gradient-2));
    color: var(--btn-text); box-shadow: var(--shadow-btn);
}
.btn-primary:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 6px 24px rgba(168, 85, 247, 0.45); }
.btn-primary:active:not(:disabled) { transform: translateY(0); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

.btn-success {
    width: 100%;
    background: linear-gradient(135deg, #22c55e, #16a34a);
    color: #fff; box-shadow: 0 4px 16px rgba(22, 163, 74, 0.3);
}
.btn-success:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 6px 24px rgba(22, 163, 74, 0.45); }
.btn-success:disabled { opacity: 0.6; cursor: not-allowed; }

/* ── Spinner ── */
.spinner {
    width: 17px; height: 17px;
    border: 2.5px solid rgba(255,255,255,0.3);
    border-top-color: var(--spinner-color);
    border-radius: 50%; animation: spin 0.7s linear infinite;
}

/* ── Error Banner ── */
.error-msg {
    display: flex; align-items: flex-start; gap: 0.6rem;
    padding: 0.75rem 1rem; margin-top: 0.8rem;
    background: var(--error-bg); color: var(--error-text);
    border: 1px solid var(--error-border); border-left: 3px solid var(--error-text);
    border-radius: 10px; font-size: 0.84rem; font-weight: 500;
    animation: fadeUp 0.3s ease both;
}
.error-msg::before {
    content: ''; flex-shrink: 0;
    width: 18px; height: 18px; margin-top: 1px;
    background: var(--error-text);
    -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='10'/%3E%3Cline x1='15' y1='9' x2='9' y2='15'/%3E%3Cline x1='9' y1='9' x2='15' y2='15'/%3E%3C/svg%3E") center/contain no-repeat;
    mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='10'/%3E%3Cline x1='15' y1='9' x2='9' y2='15'/%3E%3Cline x1='9' y1='9' x2='15' y2='15'/%3E%3C/svg%3E") center/contain no-repeat;
}

/* ── Step Success Banner ── */
.step-result-banner {
    margin-top: 0.8rem; padding: 0.85rem 1rem;
    background: var(--success-bg); border: 1px solid var(--success-border);
    border-left: 3px solid var(--success-text);
    border-radius: 10px; animation: fadeUp 0.3s ease both;
}
.step-result-header {
    display: flex; align-items: center; justify-content: space-between; gap: 0.5rem;
}
.step-success {
    display: flex; align-items: center; gap: 0.45rem;
    color: var(--success-text); font-size: 0.88rem; font-weight: 600;
}
.step-success svg { flex-shrink: 0; }
.step-info-grid {
    display: grid; grid-template-columns: auto 1fr; gap: 0.15rem 0.6rem;
    margin-top: 0.55rem; padding-top: 0.55rem;
    border-top: 1px solid var(--success-border);
    font-size: 0.82rem;
}
.step-info-label { color: var(--text-muted); font-weight: 500; white-space: nowrap; }
.step-info-value { color: var(--text-primary); font-weight: 600; }

/* ── Edit/Change Button ── */
.btn-edit {
    display: inline-flex; align-items: center; gap: 0.3rem;
    padding: 0.28rem 0.65rem; border-radius: 6px;
    font-size: 0.76rem; font-weight: 600; letter-spacing: 0.01em;
    border: 1px solid var(--border-color);
    background: var(--bg-input); color: var(--text-muted);
    cursor: pointer; transition: all 0.2s ease; font-family: inherit;
}
.btn-edit:hover {
    color: var(--btn-gradient-1); border-color: var(--btn-gradient-1);
    background: var(--bg-input-focus);
}
.btn-edit svg { width: 12px; height: 12px; }

/* ── Result Cards ── */
.result-card {
    border-radius: 14px; padding: 1.8rem;
    animation: fadeUp 0.4s ease both;
}
.result-card.success {
    background: var(--success-bg); border: 1px solid var(--success-border);
    text-align: center;
}
.result-card.success .result-icon { color: var(--success-text); margin-bottom: 0.8rem; }
.result-card.success h3 { font-size: 1.15rem; color: var(--success-text); margin-bottom: 1rem; }
.result-card.success .result-details { text-align: left; margin-bottom: 1.2rem; }

.result-row {
    display: flex; justify-content: space-between; align-items: center;
    padding: 0.55rem 0; border-bottom: 1px solid var(--border-color);
}
.result-row:last-child { border-bottom: none; }
.result-label { font-size: 0.84rem; color: var(--text-secondary); font-weight: 500; }
.result-value { font-size: 0.88rem; font-weight: 600; color: var(--text-primary); }

/* ── Query Stats ── */
.query-stats {
    display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1rem; margin-bottom: 0.6rem;
}
.query-stat {
    display: inline-flex; align-items: center; gap: 0.3rem;
    padding: 0.35rem 0.7rem; border-radius: 8px;
    font-size: 0.78rem; font-weight: 500; color: var(--text-secondary);
    background: var(--info-bg); border: 1px solid var(--border-color);
}
.query-stat strong { font-weight: 700; color: var(--text-primary); }
.query-stat.stat-available { background: var(--success-bg); border-color: var(--success-border); }
.query-stat.stat-available strong { color: var(--status-available); }
.query-stat.stat-used { background: var(--warning-bg); border-color: var(--warning-border); }
.query-stat.stat-used strong { color: var(--status-used); }
.query-stat.stat-other { background: var(--error-bg); border-color: var(--error-border); }
.query-stat.stat-other strong { color: var(--status-expired); }

/* ── Query Table ── */
.query-table-wrap {
    margin-top: 0.5rem;
    border: 1px solid var(--border-color); border-radius: 12px;
    max-height: 420px; overflow-y: auto; overflow-x: hidden;
    scrollbar-width: thin;
    scrollbar-color: var(--border-input) transparent;
}
.query-table-wrap::-webkit-scrollbar { width: 6px; }
.query-table-wrap::-webkit-scrollbar-track { background: transparent; }
.query-table-wrap::-webkit-scrollbar-thumb {
    background: var(--border-input); border-radius: 3px;
}
.query-table-wrap::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}
.query-table {
    width: 100%; border-collapse: collapse; font-size: 0.82rem;
    table-layout: fixed;
}
.query-table th {
    text-align: left; padding: 0.55rem 0.6rem;
    font-weight: 600; font-size: 0.72rem;
    color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.04em;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-body);
    position: sticky; top: 0; z-index: 2;
    box-shadow: 0 1px 0 var(--border-color);
}
.query-table td {
    padding: 0.5rem 0.6rem; border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.query-table tr:last-child td { border-bottom: none; }
.query-table tr:hover td { background: var(--bg-step-locked); }

/* Column widths: CDK | Status | Product | Email | Date */
.query-table .col-key { width: 24%; }
.query-table .col-status { width: 11%; }
.query-table .col-product { width: 24%; }
.query-table .col-email { width: 22%; }
.query-table .col-date { width: 19%; }
/* Without email/date columns */
.query-table .col-key-wide { width: 40%; }
.query-table .col-status-wide { width: 20%; }
.query-table .col-product-wide { width: 40%; }

.td-key code {
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 0.78rem; font-weight: 500; letter-spacing: 0.02em;
}
.td-email {
    font-size: 0.78rem; color: var(--text-secondary);
}
.td-date {
    font-size: 0.78rem; color: var(--text-muted);
}

/* ── Badges ── */
.badge {
    display: inline-block; padding: 0.2rem 0.6rem;
    border-radius: 6px; font-size: 0.76rem; font-weight: 600; white-space: nowrap;
}
.badge-success { background: var(--success-bg); color: var(--status-available); border: 1px solid var(--success-border); }
.badge-warning { background: var(--warning-bg); color: var(--status-used); border: 1px solid var(--warning-border); }
.badge-error { background: var(--error-bg); color: var(--status-expired); border: 1px solid var(--error-border); }
.badge-default { background: var(--info-bg); color: var(--text-muted); border: 1px solid var(--border-color); }

.no-results {
    text-align: center; padding: 2rem 1rem;
    color: var(--text-muted); font-size: 0.9rem;
}

/* ── Result Popup (Modal) ── */
.popup-overlay {
    position: fixed; inset: 0; z-index: 9999;
    display: flex; align-items: center; justify-content: center;
    background: rgba(0,0,0,0.45); backdrop-filter: blur(6px);
    opacity: 0; transition: opacity 0.25s ease;
}
.popup-overlay.open { opacity: 1; }
.popup-card {
    position: relative; width: 92%; max-width: 400px;
    padding: 2.2rem 1.8rem 1.8rem; border-radius: 18px;
    background: var(--bg-card); border: 1px solid var(--border-color);
    box-shadow: 0 20px 60px rgba(0,0,0,0.25);
    text-align: center;
    transform: scale(0.92) translateY(20px);
    transition: transform 0.3s cubic-bezier(.22,1,.36,1);
}
.popup-overlay.open .popup-card {
    transform: scale(1) translateY(0);
}
.popup-close {
    position: absolute; top: 0.8rem; right: 0.9rem;
    background: none; border: none; font-size: 1.5rem; line-height: 1;
    color: var(--text-muted); cursor: pointer; padding: 0.2rem;
    transition: color 0.15s ease;
}
.popup-close:hover { color: var(--text-primary); }
.popup-icon { margin-bottom: 0.8rem; }
.popup-icon.icon-success { color: var(--success-text); }
.popup-icon.icon-error { color: var(--error-text); }
.popup-title {
    font-size: 1.2rem; font-weight: 700; margin-bottom: 0.6rem;
    color: var(--text-primary);
}
.popup-success .popup-title { color: var(--success-text); }
.popup-error .popup-title { color: var(--error-text); }
.popup-error-msg {
    font-size: 0.88rem; color: var(--text-secondary); line-height: 1.5;
    margin-bottom: 1rem; padding: 0; white-space: pre-wrap;
}
.popup-details {
    text-align: left; margin: 0.8rem 0 1.2rem;
    padding: 0.7rem 0.9rem; border-radius: 10px;
    background: var(--bg-input); border: 1px solid var(--border-color);
}
.popup-row {
    display: flex; justify-content: space-between; align-items: center;
    padding: 0.4rem 0;
}
.popup-row + .popup-row { border-top: 1px solid var(--border-color); }
.popup-label { font-size: 0.82rem; color: var(--text-muted); font-weight: 500; }
.popup-value { font-size: 0.84rem; font-weight: 600; color: var(--text-primary); }
.popup-card .btn { margin-top: 0.6rem; width: 100%; }
.popup-warning .popup-title { color: #d97706; }
.popup-icon.icon-warning { color: #d97706; }
.popup-warning-msg {
    font-size: 0.88rem; color: var(--text-secondary); line-height: 1.5;
    margin-bottom: 1rem; padding: 0;
}
.popup-btn-row { display: flex; gap: 0.6rem; margin-top: 0.6rem; }
.popup-btn-row .btn { flex: 1; }

/* ── Utility ── */
.hidden { display: none !important; }
.mt-1 { margin-top: 1rem; }

/* ── Animations ── */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes stepUnlock {
    from { opacity: 0.45; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Responsive ── */
@media (max-width: 640px) {
    .site-header { flex-wrap: wrap; justify-content: center; gap: 0.5rem; }
    .header-left { flex-wrap: wrap; justify-content: center; }
    .card { padding: 1.5rem 1.1rem; border-radius: 16px; }
    .card-wide { max-width: 100%; }
    .card-title { font-size: 1.3rem; }
    .step { padding: 1rem; }
    .link-buttons { flex-direction: column; }
    .bg-gradient::before { width: 350px; height: 350px; filter: blur(80px); }
    .bg-gradient::after { width: 300px; height: 300px; filter: blur(80px); }
    .query-table { font-size: 0.76rem; }
    .query-table th { padding: 0.45rem 0.4rem; font-size: 0.68rem; }
    .query-table td { padding: 0.4rem 0.4rem; }
    .td-key code { font-size: 0.72rem; }
}