/**
 * User Hub Tools - Central Stylesheet
 * Reusable styles for all tools in the user hub
 * Maintains consistency with user-hub.css design system
 */

/* ===================================
   CSS VARIABLES & DESIGN TOKENS
   =================================== */
:root {
    /* Inherit from user-hub.css */
    --tool-primary: var(--accent, #2997ff);
    --tool-bg-card: var(--bg-card, rgba(255, 255, 255, 0.04));
    --tool-border: var(--border-color, rgba(255, 255, 255, 0.08));
    --tool-text-primary: var(--text-primary, #f5f5f7);
    --tool-text-secondary: var(--text-secondary, #86868b);
    --tool-radius: var(--radius-md, 20px);
    --tool-radius-sm: var(--radius-sm, 12px);
    
    /* Tool-specific gradients */
    --gradient-primary: linear-gradient(135deg, #2997ff 0%, #0077ed 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-warning: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    --gradient-danger: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    --gradient-purple: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
    --gradient-pink: linear-gradient(135deg, #ec4899 0%, #db2777 100%);
}

/* ===================================
   ANIMATIONS
   =================================== */
@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes shimmer {
    0% { background-position: -1000px 0; }
    100% { background-position: 1000px 0; }
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ===================================
   TOOL CONTAINER
   =================================== */
.tool-view {
    padding: 2rem;
    height: 100%;
    overflow-y: auto;
    animation: fadeIn 0.4s ease-out;
}

.tool-view::-webkit-scrollbar {
    width: 8px;
}

.tool-view::-webkit-scrollbar-track {
    background: transparent;
}

.tool-view::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

.tool-view::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* ===================================
   TOOL HEADER
   =================================== */
.tool-header {
    margin-bottom: 2rem;
    animation: slideUp 0.6s ease-out;
}

.tool-header-center {
    text-align: center;
}

.tool-title {
    font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'SF Pro Display', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.2;
}

.tool-title-gradient-purple {
    background: var(--gradient-purple);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tool-title-gradient-pink {
    background: var(--gradient-pink);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tool-subtitle {
    color: var(--tool-text-secondary);
    font-size: 1.1rem;
    line-height: 1.6;
    max-width: 700px;
    margin: 0 auto;
}

/* ===================================
   TOOL CARDS
   =================================== */
.tool-card {
    background: var(--tool-bg-card);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--tool-border);
    border-radius: var(--tool-radius);
    padding: 2rem;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1),
                border-color 0.6s cubic-bezier(0.16, 1, 0.3, 1),
                box-shadow 0.6s cubic-bezier(0.16, 1, 0.3, 1),
                background 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.tool-card:hover {
    transform: translateY(-4px);
    border-color: rgba(41, 151, 255, 0.3);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.4),
                0 0 0 1px rgba(41, 151, 255, 0.2),
                0 0 20px 2px rgba(41, 151, 255, 0.15);
    background: var(--card-hover-bg, rgba(255, 255, 255, 0.07));
}

.tool-card:hover::before {
    opacity: 1;
}

/* ===================================
   FORM ELEMENTS
   =================================== */
.tool-input,
.tool-textarea,
.tool-select {
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.1);
    color: white;
    padding: 1rem 1.25rem;
    border-radius: var(--tool-radius-sm);
    width: 100%;
    font-size: 1rem;
    font-family: inherit;
    transition: none;
}

.tool-textarea {
    resize: vertical;
    min-height: 100px;
}

.tool-input::placeholder,
.tool-textarea::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

.tool-input:focus,
.tool-textarea:focus,
.tool-select:focus {
    outline: none;
    border-color: var(--tool-primary);
    box-shadow: 0 0 0 4px rgba(41, 151, 255, 0.1),
                0 4px 16px rgba(41, 151, 255, 0.2);
    background: rgba(0, 0, 0, 0.5);
}

/* ===================================
   BUTTONS
   =================================== */
.tool-cta {
    background: var(--gradient-primary);
    color: white;
    font-weight: 700;
    padding: 1rem 2rem;
    border-radius: var(--tool-radius-sm);
    border: none;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 16px rgba(41, 151, 255, 0.4);
    position: relative;
    overflow: hidden;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.tool-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.tool-cta:hover::before {
    left: 100%;
}

.tool-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(41, 151, 255, 0.5);
}

.tool-cta:active {
    transform: translateY(0);
}

.tool-cta:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.tool-btn {
    background: var(--gradient-primary);
    color: white;
    font-weight: 700;
    padding: 1rem 2rem;
    border-radius: var(--tool-radius-sm);
    border: none;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 16px rgba(41, 151, 255, 0.4);
    position: relative;
    overflow: hidden;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.tool-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.tool-btn:hover::before {
    left: 100%;
}

.tool-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(41, 151, 255, 0.5);
}

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

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

/* Button Variants */
.tool-btn-success {
    background: var(--gradient-success);
    box-shadow: 0 4px 16px rgba(16, 185, 129, 0.4);
}

.tool-btn-success:hover {
    box-shadow: 0 6px 24px rgba(16, 185, 129, 0.5);
}

.tool-btn-warning {
    background: var(--gradient-warning);
    box-shadow: 0 4px 16px rgba(251, 191, 36, 0.4);
}

.tool-btn-warning:hover {
    box-shadow: 0 6px 24px rgba(251, 191, 36, 0.5);
}

/* ===================================
   BADGES & LABELS
   =================================== */
.tool-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.tool-badge-primary {
    background: rgba(41, 151, 255, 0.15);
    border: 1px solid rgba(41, 151, 255, 0.3);
    color: var(--tool-primary);
}

.tool-badge-success {
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #10b981;
}

.tool-badge-warning {
    background: rgba(251, 191, 36, 0.15);
    border: 1px solid rgba(251, 191, 36, 0.3);
    color: #fbbf24;
}

/* ===================================
   GRIDS & LAYOUTS
   =================================== */
.tool-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .tool-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .tool-grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }
}

.tool-container {
    max-width: 1200px;
    margin: 0 auto;
}

.tool-container-narrow {
    max-width: 800px;
    margin: 0 auto;
}

/* ===================================
   CTA BANNERS
   =================================== */
.tool-cta-banner {
    background: var(--tool-bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--tool-border);
    border-radius: var(--tool-radius);
    padding: 1.5rem 2rem;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    flex-wrap: wrap;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.tool-cta-content {
    flex: 1;
    min-width: 250px;
}

.tool-cta-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--tool-text-primary);
    margin-bottom: 0.5rem;
}

.tool-cta-text {
    font-size: 0.95rem;
    color: var(--tool-text-secondary);
    line-height: 1.5;
}

.tool-cta-button {
    flex-shrink: 0;
    padding: 0.875rem 1.75rem;
    background: var(--gradient-primary);
    color: white;
    font-weight: 700;
    border-radius: var(--tool-radius-sm);
    text-decoration: none;
    transition: all 0.3s ease;
    white-space: nowrap;
    box-shadow: 0 4px 12px rgba(41, 151, 255, 0.3);
}

.tool-cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(41, 151, 255, 0.4);
}

/* ===================================
   LOADING STATES
   =================================== */
.tool-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    text-align: center;
}

.tool-spinner {
    border: 3px solid rgba(41, 151, 255, 0.1);
    border-top: 3px solid var(--tool-primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 0.8s linear infinite;
    margin-bottom: 1rem;
}

.tool-loading-text {
    color: var(--tool-text-secondary);
    font-size: 0.95rem;
}

/* ===================================
   MODALS
   =================================== */
.tool-modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
    animation: fadeIn 0.3s ease;
    padding: 1rem;
}

.tool-modal.active {
    display: flex;
}

.tool-modal-content {
    background: var(--tool-bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--tool-border);
    border-radius: var(--tool-radius);
    padding: 2rem;
    max-width: 540px;
    width: 100%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: slideUp 0.4s ease-out;
    position: relative;
    max-height: 90vh;
    overflow-y: auto;
}

.tool-modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
    border: none;
    color: var(--tool-text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.2s;
}

.tool-modal-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--tool-text-primary);
}

/* ===================================
   STATS / METRICS
   =================================== */
.tool-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.tool-stat-card {
    background: var(--tool-bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--tool-border);
    border-radius: var(--tool-radius-sm);
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
}

.tool-stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.tool-stat-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 12px;
    margin-bottom: 1rem;
}

.tool-stat-label {
    color: var(--tool-text-secondary);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
}

.tool-stat-value {
    color: var(--tool-text-primary);
    font-size: 1.75rem;
    font-weight: 700;
}

/* ===================================
   UTILITY CLASSES
   =================================== */
.tool-hidden {
    display: none !important;
}

.tool-text-center {
    text-align: center;
}

.tool-mb-1 { margin-bottom: 0.5rem; }
.tool-mb-2 { margin-bottom: 1rem; }
.tool-mb-3 { margin-bottom: 1.5rem; }
.tool-mb-4 { margin-bottom: 2rem; }

.tool-mt-1 { margin-top: 0.5rem; }
.tool-mt-2 { margin-top: 1rem; }
.tool-mt-3 { margin-top: 1.5rem; }
.tool-mt-4 { margin-top: 2rem; }

/* ===================================
   RESPONSIVE
   =================================== */
@media (max-width: 768px) {
    .tool-view {
        padding: 1.5rem;
    }

    .tool-title {
        font-size: 2rem;
    }

    .tool-subtitle {
        font-size: 1rem;
    }

    .tool-card {
        padding: 1.5rem;
    }

    .tool-cta-banner {
        flex-direction: column;
        text-align: center;
    }

    .tool-cta-button {
        width: 100%;
    }

    .tool-stats {
        grid-template-columns: 1fr;
    }
}