/* ==================== CSS VARIABLES ==================== */
:root {
    --bg: #0b0f14;
    --panel: rgba(18, 24, 32, 0.92);
    --border: #1f2937;
    --green: #00ff41;
    --text: #e5e7eb;
    --muted: #9ca3af;
    --error: #ef4444;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --radius: 14px;
    --transition: all 0.3s ease;
}

/* Light mode variables */
[data-theme="light"] {
    --bg: #f0f2f5;
    --panel: rgba(255, 255, 255, 0.92);
    --border: #d1d5db;
    --green: #00cc33;
    --text: #111827;
    --muted: #6b7280;
    --error: #dc2626;
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

/* ==================== RESET ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ==================== BODY ==================== */
body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    overflow: hidden;
    width: 100vw;
    height: 100vh;
    margin: 0;
    position: relative;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==================== CANVAS CONTAINER ==================== */
#canvas-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* ==================== UI CONTAINER ==================== */
#ui-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    pointer-events: none;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* ==================== APP ==================== */
#app {
    pointer-events: auto;
    width: 100%;
    max-width: 560px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 16px;
    background: transparent;
    border-radius: var(--radius);
    transform-style: preserve-3d;
    transition: transform 0.3s ease;
    scrollbar-width: thin;
    scrollbar-color: var(--green) transparent;
}

#app::-webkit-scrollbar {
    width: 6px;
}
#app::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 10px;
}
#app::-webkit-scrollbar-thumb {
    background: var(--green);
    border-radius: 10px;
}

/* ==================== HEADER ==================== */
.header {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
    margin-bottom: 16px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    position: relative;
}

.header-top {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.header h1 {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.header span {
    color: var(--green);
}

.header p {
    font-size: 12px;
    color: var(--muted);
    margin-top: 6px;
}

/* Theme Toggle Button */
.theme-toggle {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text);
    transition: var(--transition);
}

.theme-toggle:hover {
    border-color: var(--green);
    color: var(--green);
    box-shadow: 0 0 10px rgba(0, 255, 65, 0.3);
}

.channel {
    margin-top: 10px;
    display: inline-block;
    padding: 8px 14px;
    border-radius: 10px;
    border: 1px solid var(--border);
    color: var(--green);
    font-size: 12px;
    text-decoration: none;
    background: rgba(0, 255, 65, 0.05);
    transition: var(--transition);
}

.channel:hover {
    background: rgba(0, 255, 65, 0.15);
    box-shadow: 0 0 15px rgba(0, 255, 65, 0.3);
    transform: translateY(-1px);
}

/* ==================== FORM ==================== */
.form-container {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 16px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
}

.field {
    margin-bottom: 16px;
}

label {
    font-size: 12px;
    color: var(--muted);
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    letter-spacing: 0.3px;
}

select,
input {
    width: 100%;
    padding: 14px;
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text);
    font-size: 14px;
    font-family: 'Inter', sans-serif;
    transition: var(--transition);
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
}

[data-theme="light"] select,
[data-theme="light"] input {
    background: rgba(255, 255, 255, 0.9);
}

select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%2300ff41' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 40px;
}

select:focus,
input:focus {
    outline: none;
    border-color: var(--green);
    box-shadow: 0 0 10px rgba(0, 255, 65, 0.3);
}

input[type="number"] {
    -moz-appearance: textfield;
}

input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

/* ==================== BUTTONS ==================== */
.actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 14px;
}

.btn {
    padding: 14px;
    border-radius: 12px;
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--border);
    color: var(--text);
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition);
    font-family: 'Inter', sans-serif;
    letter-spacing: 0.3px;
}

[data-theme="light"] .btn {
    background: rgba(255, 255, 255, 0.9);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
}

.btn:active {
    transform: translateY(0);
}

.btn.primary {
    border-color: var(--green);
    color: var(--green);
    background: rgba(0, 255, 65, 0.05);
}

.btn.primary:hover {
    background: rgba(0, 255, 65, 0.15);
    box-shadow: 0 0 20px rgba(0, 255, 65, 0.3);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* ==================== RESULT ==================== */
.result {
    display: none;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px;
    margin-bottom: 16px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.result-header h3 {
    font-size: 16px;
    color: var(--green);
    font-weight: 700;
}

.result-count {
    background: rgba(0, 255, 65, 0.1);
    color: var(--green);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

/* ==================== CARDS GRID ==================== */
.cards-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

.vcc-card {
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 16px;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

[data-theme="light"] .vcc-card {
    background: rgba(255, 255, 255, 0.9);
}

.vcc-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 255, 65, 0.1);
    border-color: rgba(0, 255, 65, 0.3);
}

.vcc-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--green), transparent);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.card-type {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 600;
    color: var(--green);
}

.card-number {
    font-family: 'Courier New', monospace;
    font-size: 16px;
    letter-spacing: 1px;
    text-align: center;
    margin-bottom: 12px;
    padding: 8px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    word-break: break-all;
}

[data-theme="light"] .card-number {
    background: rgba(0, 0, 0, 0.05);
}

.card-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 12px;
}

.card-detail {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.card-label {
    font-size: 10px;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.card-value {
    font-size: 14px;
    font-weight: 600;
    font-family: 'Courier New', monospace;
}

/* ==================== CARD ACTIONS ==================== */
.card-actions {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 8px;
}

.card-btn {
    padding: 8px;
    border-radius: 8px;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
    font-size: 11px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: var(--transition);
    font-family: 'Inter', sans-serif;
}

.card-btn:hover {
    border-color: var(--green);
    color: var(--green);
    background: rgba(0, 255, 65, 0.05);
}

/* ==================== LOADING ==================== */
.loading {
    text-align: center;
    color: var(--muted);
    padding: 20px;
}

.spinner {
    width: 36px;
    height: 36px;
    border: 3px solid #1f2937;
    border-top-color: var(--green);
    border-radius: 50%;
    margin: 10px auto;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ==================== ERROR ==================== */
.error {
    text-align: center;
    color: var(--error);
    padding: 20px;
    font-weight: 600;
}

/* ==================== BULK ACTIONS ==================== */
.bulk-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 16px;
}

/* ==================== FOOTER ==================== */
.footer {
    text-align: center;
    font-size: 11px;
    color: var(--muted);
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
    line-height: 1.8;
}

/* ==================== POPUP OVERLAY (Install Prompt) ==================== */
.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 350;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.popup-content {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 30px;
    max-width: 320px;
    width: 90%;
    text-align: center;
    position: relative;
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.popup-close-btn {
    position: absolute;
    top: 12px;
    right: 12px;
    background: transparent;
    border: none;
    color: var(--muted);
    font-size: 20px;
    cursor: pointer;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
}

.popup-close-btn:hover {
    background: rgba(0,0,0,0.1);
    color: var(--text);
}

.w-20 {
    width: 80px;
}
.h-20 {
    height: 80px;
}
.rounded-2xl {
    border-radius: 16px;
}
.mx-auto {
    margin-left: auto;
    margin-right: auto;
}
.shadow-lg {
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
}
.mb-4 {
    margin-bottom: 16px;
}
.mb-2 {
    margin-bottom: 8px;
}
.mb-6 {
    margin-bottom: 24px;
}
.text-xl {
    font-size: 20px;
}
.font-bold {
    font-weight: 700;
}
.text-gray-500 {
    color: var(--muted);
}
.text-sm {
    font-size: 14px;
}
.w-full {
    width: 100%;
}
.text-lg {
    font-size: 18px;
}
.btn-premium {
    background: var(--green);
    color: #0b0f14;
    border: none;
    padding: 12px 24px;
    border-radius: 12px;
    font-weight: 700;
    font-size: 16px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition);
    margin-bottom: 12px;
}
.btn-premium:hover {
    opacity: 0.9;
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(0,255,65,0.4);
}
.not-now-btn {
    background: transparent;
    border: none;
    color: var(--muted);
    cursor: pointer;
    font-size: 14px;
    text-decoration: underline;
    margin-top: 8px;
    transition: var(--transition);
}
.not-now-btn:hover {
    color: var(--text);
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 480px) {
    .header h1 {
        font-size: 17px;
    }
    .card-details {
        grid-template-columns: 1fr;
        gap: 8px;
    }
    .card-actions {
        grid-template-columns: 1fr;
    }
    .bulk-actions {
        grid-template-columns: 1fr;
    }
    .actions {
        grid-template-columns: 1fr;
    }
    #app {
        padding: 8px;
        max-height: 95vh;
    }
}

/* ==================== REDUCED MOTION ==================== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}