/* Custom CSS for MaskMyNumbers */
:root {
    /* Primary Colors (Blue) */
    --color-primary-50: #eff6ff;
    --color-primary-100: #dbeafe;
    --color-primary-200: #bfdbfe;
    --color-primary-300: #93c5fd;
    --color-primary-400: #60a5fa;
    --color-primary-500: #3b82f6;
    --color-primary-600: #2563eb;
    --color-primary-700: #1d4ed8;
    --color-primary-800: #1e40af;
    --color-primary-900: #1e3a8a;

    /* Slate Colors (Gray) */
    --color-slate-50: #f8fafc;
    --color-slate-100: #f1f5f9;
    --color-slate-200: #e2e8f0;
    --color-slate-300: #cbd5e1;
    --color-slate-400: #94a3b8;
    --color-slate-500: #64748b;
    --color-slate-600: #475569;
    --color-slate-700: #334155;
    --color-slate-800: #1e293b;
    --color-slate-900: #0f172a;

    /* Emerald Colors (Green) */
    --color-emerald-50: #ecfdf5;
    --color-emerald-100: #d1fae5;
    --color-emerald-200: #a7f3d0;
    --color-emerald-500: #10b981;
    --color-emerald-600: #059669;
    --color-emerald-700: #047857;
    --color-emerald-800: #065f46;

    /* Red Colors */
    --color-red-50: #fef2f2;
    --color-red-500: #ef4444;
    --color-red-600: #dc2626;

    /* Amber Colors (Warning) */
    --color-amber-100: #fef3c7;
    --color-amber-800: #92400e;

    /* Common Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-soft: 0 2px 15px -3px rgba(0, 0, 0, 0.07), 0 10px 20px -2px rgba(0, 0, 0, 0.04);
    --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* Utilities */
#usageInfoBar {
    display: none !important;
}

.tool-input {
    width: 100%;
    padding: 0.75rem 1rem; /* py-3 px-4 */
    border: 1px solid var(--color-slate-200);
    border-radius: 0.5rem; /* rounded-lg */
    background-color: white;
    transition: all 0.2s;
    outline: 2px solid transparent;
    outline-offset: 2px;
}

.tool-input:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--color-primary-500); /* ring-2 ring-primary-500 */
    border-color: transparent;
    box-shadow: var(--shadow-soft);
}

.tool-btn {
    padding: 0.75rem 1.5rem; /* py-3 px-6 */
    border-radius: 0.5rem; /* rounded-lg */
    font-weight: 500; /* font-medium */
    transition: all 0.2s;
    outline: none;
}

.tool-btn:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--color-primary-500), 0 0 0 4px white; /* ring-2 ring-offset-2 */
}

.tool-btn-primary {
    background-color: var(--color-primary-600);
    color: white;
    box-shadow: var(--shadow-sm);
}

.tool-btn-primary:hover {
    background-color: var(--color-primary-700);
}

.tool-btn-primary:focus {
    box-shadow: 0 0 0 2px var(--color-primary-500), 0 0 0 4px white;
}

.tool-btn-secondary {
    background-color: var(--color-slate-100);
    color: var(--color-slate-700);
}

.tool-btn-secondary:hover {
    background-color: var(--color-slate-200);
}

.tool-btn-secondary:focus {
    box-shadow: 0 0 0 2px var(--color-slate-400), 0 0 0 4px white;
}

.tool-select {
    width: 100%;
    padding: 0.75rem 1rem; /* py-3 px-4 */
    border: 1px solid var(--color-slate-200);
    border-radius: 0.5rem; /* rounded-lg */
    background-color: white;
    cursor: pointer;
    transition: all 0.2s;
    outline: 2px solid transparent;
    outline-offset: 2px;
}

.tool-select:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--color-primary-500); /* ring-2 ring-primary-500 */
    border-color: transparent;
}

.result-card {
    background-color: white;
    border-radius: 0.5rem; /* rounded-lg */
    border: 1px solid var(--color-slate-200);
    padding: 1rem; /* p-4 */
    transition: all 0.2s;
}

.result-card:hover {
    box-shadow: var(--shadow-soft);
}

.result-card-valid {
    border-left: 4px solid var(--color-emerald-500);
    background-color: rgba(236, 253, 245, 0.5); /* emerald-50/50 */
}

.result-card-invalid {
    border-left: 4px solid var(--color-red-500);
    background-color: rgba(254, 242, 242, 0.5); /* red-50/50 */
}

.copy-btn {
    padding: 0.375rem 0.75rem; /* py-1.5 px-3 */
    font-size: 0.875rem; /* text-sm */
    font-weight: 500; /* font-medium */
    border-radius: 0.375rem; /* rounded-md */
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 0.375rem; /* gap-1.5 */
    cursor: pointer;
    background-color: var(--color-primary-100);
    color: var(--color-primary-700);
    border: none;
}

.copy-btn:hover {
    background-color: var(--color-primary-200);
}

.copy-btn-success {
    background-color: var(--color-emerald-100);
    color: var(--color-emerald-700);
}

.copy-btn-success:hover {
    background-color: var(--color-emerald-200);
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.125rem 0.625rem; /* py-0.5 px-2.5 */
    border-radius: 9999px; /* rounded-full */
    font-size: 0.75rem; /* text-xs */
    font-weight: 500; /* font-medium */
}

.badge-success {
    background-color: var(--color-emerald-100);
    color: var(--color-emerald-800);
}

.badge-info {
    background-color: var(--color-primary-100);
    color: var(--color-primary-800);
}

.badge-warning {
    background-color: var(--color-amber-100);
    color: var(--color-amber-800);
}

.section-title {
    font-size: 1.125rem; /* text-lg */
    font-weight: 600; /* font-semibold */
    color: var(--color-slate-800);
    margin-bottom: 1rem; /* mb-4 */
    display: flex;
    align-items: center;
    gap: 0.5rem; /* gap-2 */
}

.info-card {
    background-color: var(--color-slate-50);
    border-radius: 0.5rem; /* rounded-lg */
    padding: 1rem; /* p-4 */
    border: 1px solid var(--color-slate-200);
}

.info-icon {
    width: 1.25rem; /* w-5 */
    height: 1.25rem; /* h-5 */
    color: var(--color-primary-600);
}

.gradient-bg {
    background-image: linear-gradient(to bottom right, var(--color-slate-100), #dbeafe, #e0e7ff); /* slate-100 via blue-100 to indigo-100 */
    min-height: 100vh;
}

.glass-card {
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    border-radius: 0.75rem; /* rounded-xl */
    box-shadow: var(--shadow-card);
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.toast {
    position: fixed;
    bottom: 1rem; /* bottom-4 */
    right: 1rem; /* right-4 */
    padding: 0.75rem 1rem; /* py-3 px-4 */
    border-radius: 0.5rem; /* rounded-lg */
    box-shadow: var(--shadow-lg);
    transform: translateY(5rem); /* translate-y-20 */
    opacity: 0;
    transition: all 0.3s;
    z-index: 9999;
    display: flex;
    align-items: center;
    gap: 0.5rem; /* gap-2 */
}

.toast.success {
    background-color: var(--color-emerald-500);
    color: white;
}

.toast.error {
    background-color: var(--color-red-500);
    color: white;
}

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

/* FAQ Accordion Styles */
.faq-item {
    border: 1px solid var(--color-slate-200);
    border-radius: 0.5rem; /* rounded-lg */
    overflow: hidden;
    transition: all 0.2s;
}

.faq-item:hover {
    box-shadow: var(--shadow-soft);
}

.faq-question {
    width: 100%;
    padding: 1rem 1.5rem; /* py-4 px-6 */
    text-align: left;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    background-color: white;
    transition: background-color 0.2s;
}

.faq-question:hover {
    background-color: var(--color-slate-50);
}

.faq-question-text {
    font-weight: 600; /* font-semibold */
    color: var(--color-slate-800);
    font-size: 1rem; /* text-base */
}

.faq-answer {
    padding: 1rem 1.5rem; /* py-4 px-6 */
    background-color: var(--color-slate-50);
    border-top: 1px solid var(--color-slate-100);
}

.faq-answer-text {
    color: var(--color-slate-600);
    line-height: 1.625; /* leading-relaxed */
}

.faq-icon {
    width: 1.25rem; /* w-5 */
    height: 1.25rem; /* h-5 */
    color: var(--color-primary-500);
    transition: transform 0.2s;
    flex-shrink: 0;
    margin-left: 1rem; /* ml-4 */
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}