/* ============================================================================
   LEANPIVOT.AI STYLE GUIDE
   Version: 2.0
   Last Updated: 2025-01-10

   Professional Teal-Blue Design System
   Inspired by: LeanPivot logo + Coursera's systematic approach
   ============================================================================ */

/* ----------------------------------------------------------------------------
   1. DESIGN TOKENS (CSS Custom Properties)
   ---------------------------------------------------------------------------- */

:root {
    /* ===== COLOR SYSTEM ===== */

    /* Primary: Teal-Blue (Logo-inspired, Professional) */
    --lp-primary-900: #0C4A6E;        /* Deepest ocean */
    --lp-primary-800: #075985;        /* Deep ocean blue */
    --lp-primary-700: #0369A1;        /* Professional teal-blue (MAIN) */
    --lp-primary-600: #0284C7;        /* Medium teal-blue */
    --lp-primary-500: #0EA5E9;        /* Bright sky blue */
    --lp-primary-400: #38BDF8;        /* Light sky */
    --lp-primary-300: #7DD3FC;        /* Very light sky */
    --lp-primary-200: #BAE6FD;        /* Pale sky */
    --lp-primary-100: #E0F2FE;        /* Lightest tint */

    /* Secondary: Slate (Logo's professional tone) */
    --lp-slate-900: #0F172A;
    --lp-slate-800: #1E293B;
    --lp-slate-700: #334155;
    --lp-slate-600: #475569;          /* Matches logo slate */
    --lp-slate-500: #64748B;
    --lp-slate-400: #94A3B8;
    --lp-slate-300: #CBD5E1;
    --lp-slate-200: #E2E8F0;
    --lp-slate-100: #F1F5F9;
    --lp-slate-50: #F8FAFC;

    /* Accent: Purple (Coursera-inspired, Creative) */
    --lp-purple-900: #581C87;
    --lp-purple-800: #6B21A8;
    --lp-purple-700: #7E22CE;
    --lp-purple-600: #6D28D9;         /* Deep purple (ACCENT) */
    --lp-purple-500: #7C3AED;         /* Violet-600 */
    --lp-purple-400: #8B5CF6;         /* Rich violet */
    --lp-purple-300: #A78BFA;         /* Light violet */
    --lp-purple-200: #C4B5FD;
    --lp-purple-100: #E9D5FF;

    /* Success: Teal (Balanced, Growth-oriented) */
    --lp-success-900: #134E4A;
    --lp-success-800: #115E59;
    --lp-success-700: #0F766E;
    --lp-success-600: #0D9488;        /* Deeper teal */
    --lp-success-500: #14B8A6;        /* Balanced teal */
    --lp-success-400: #2DD4BF;        /* Muted mint */
    --lp-success-300: #5EEAD4;
    --lp-success-200: #99F6E4;
    --lp-success-100: #CCFBF1;

    /* Warning: Amber */
    --lp-warning-700: #B45309;
    --lp-warning-600: #D97706;
    --lp-warning-500: #F59E0B;
    --lp-warning-400: #FBBF24;
    --lp-warning-300: #FCD34D;

    /* Danger: Red */
    --lp-danger-700: #B91C1C;
    --lp-danger-600: #DC2626;
    --lp-danger-500: #EF4444;
    --lp-danger-400: #F87171;
    --lp-danger-300: #FCA5A5;

    /* ===== TYPOGRAPHY ===== */
    --lp-font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --lp-font-mono: 'SF Mono', Monaco, 'Cascadia Code', monospace;

    /* Font Sizes (Systematic Scale) */
    --lp-text-xs: 0.75rem;      /* 12px */
    --lp-text-sm: 0.875rem;     /* 14px */
    --lp-text-base: 1rem;       /* 16px */
    --lp-text-lg: 1.125rem;     /* 18px */
    --lp-text-xl: 1.25rem;      /* 20px */
    --lp-text-2xl: 1.5rem;      /* 24px */
    --lp-text-3xl: 1.875rem;    /* 30px */
    --lp-text-4xl: 2.25rem;     /* 36px */
    --lp-text-5xl: 3rem;        /* 48px */

    /* Font Weights */
    --lp-font-normal: 400;
    --lp-font-medium: 500;
    --lp-font-semibold: 600;
    --lp-font-bold: 700;
    --lp-font-extrabold: 800;

    /* ===== SPACING SYSTEM ===== */
    --lp-spacing-1: 0.25rem;    /* 4px */
    --lp-spacing-2: 0.5rem;     /* 8px */
    --lp-spacing-3: 0.75rem;    /* 12px */
    --lp-spacing-4: 1rem;       /* 16px */
    --lp-spacing-5: 1.25rem;    /* 20px */
    --lp-spacing-6: 1.5rem;     /* 24px */
    --lp-spacing-8: 2rem;       /* 32px */
    --lp-spacing-10: 2.5rem;    /* 40px */
    --lp-spacing-12: 3rem;      /* 48px */
    --lp-spacing-16: 4rem;      /* 64px */

    /* ===== SHADOWS ===== */
    --lp-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --lp-shadow-base: 0 2px 10px rgba(0, 0, 0, 0.08);
    --lp-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --lp-shadow-lg: 0 8px 20px rgba(0, 0, 0, 0.12);
    --lp-shadow-xl: 0 12px 32px rgba(0, 0, 0, 0.15);

    /* Color-specific shadows */
    --lp-shadow-primary: 0 4px 12px rgba(3, 105, 161, 0.25);
    --lp-shadow-primary-lg: 0 12px 32px rgba(3, 105, 161, 0.35);
    --lp-shadow-success: 0 4px 12px rgba(13, 148, 136, 0.25);
    --lp-shadow-purple: 0 4px 12px rgba(109, 40, 217, 0.25);

    /* ===== BORDERS ===== */
    --lp-border-radius-sm: 4px;
    --lp-border-radius-base: 8px;
    --lp-border-radius-md: 12px;
    --lp-border-radius-lg: 16px;
    --lp-border-radius-xl: 24px;
    --lp-border-radius-full: 9999px;

    --lp-border-width: 1px;
    --lp-border-color: var(--lp-slate-200);

    /* ===== TRANSITIONS ===== */
    --lp-transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --lp-transition-base: 300ms cubic-bezier(0.25, 0.8, 0.25, 1);
    --lp-transition-slow: 500ms cubic-bezier(0.25, 0.8, 0.25, 1);

    /* ===== GRADIENTS ===== */
    --lp-gradient-primary: linear-gradient(135deg, var(--lp-primary-800) 0%, var(--lp-primary-700) 100%);
    --lp-gradient-primary-bright: linear-gradient(135deg, var(--lp-primary-700) 0%, var(--lp-primary-500) 100%);
    --lp-gradient-success: linear-gradient(135deg, var(--lp-success-600) 0%, var(--lp-success-400) 100%);
    --lp-gradient-purple: linear-gradient(135deg, var(--lp-purple-600) 0%, var(--lp-purple-400) 100%);

    /* ===== Z-INDEX SCALE ===== */
    --lp-z-dropdown: 1000;
    --lp-z-sticky: 1020;
    --lp-z-fixed: 1030;
    --lp-z-modal-backdrop: 1040;
    --lp-z-modal: 1050;
    --lp-z-popover: 1060;
    --lp-z-tooltip: 1070;
}

/* ----------------------------------------------------------------------------
   2. BASE STYLES
   ---------------------------------------------------------------------------- */

body {
    font-family: var(--lp-font-family);
    font-size: var(--lp-text-base);
    line-height: 1.5;
    color: var(--lp-slate-900);
    background-color: var(--lp-slate-50);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ----------------------------------------------------------------------------
   3. STAT CARDS (Dashboard Metrics)
   ---------------------------------------------------------------------------- */

.lp-stats-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
    height: 100%;
}

.lp-stats-card {
    padding: var(--lp-spacing-8);
    border-radius: var(--lp-border-radius-md);
    text-align: center;
    color: white;
    height: 100%;
    position: relative;
    overflow: hidden;
    box-shadow: var(--lp-shadow-base);
    transition: var(--lp-transition-base);
    min-height: 160px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    cursor: pointer;
}

/* Subtle texture pattern for depth */
.lp-stats-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.03) 0%, transparent 50%);
    pointer-events: none;
}

.lp-stats-card:hover {
    transform: translateY(-5px) scale(1.02);
}

.lp-stats-card:active {
    transform: translateY(-3px) scale(1.01);
    transition-duration: 100ms;
}

/* Top accent bar */
.lp-stats-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
}

/* Stat Card Typography */
.lp-stat-value {
    font-size: var(--lp-text-5xl);
    font-weight: var(--lp-font-extrabold);
    line-height: 1;
    margin-bottom: var(--lp-spacing-3);
    letter-spacing: -0.02em;
}

.lp-stat-label {
    font-size: var(--lp-text-sm);
    font-weight: var(--lp-font-semibold);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    opacity: 0.95;
    word-break: break-word;
    line-height: 1.2;
    margin-bottom: var(--lp-spacing-2);
}

.lp-stat-details {
    margin-top: var(--lp-spacing-2);
    font-size: var(--lp-text-xs);
    line-height: 1.2;
    opacity: 0.85;
    font-weight: var(--lp-font-normal);
}

/* Action Indicator Arrow */
.lp-stat-action-indicator {
    position: absolute;
    bottom: 12px;
    right: 12px;
    opacity: 0;
    transform: translateX(-8px);
    transition: var(--lp-transition-base);
    font-size: var(--lp-text-base);
}

.lp-stats-card:hover .lp-stat-action-indicator {
    opacity: 0.8;
    transform: translateX(0);
}

/* Stat Card Color Variants - Solid colors (Coursera approach, better contrast) */
.lp-stats-card--primary {
    background: var(--lp-primary-700); /* #0369A1 - WCAG AAA (7.9:1) */
}

.lp-stats-card--primary:hover {
    background: var(--lp-primary-800); /* Darker on hover */
    box-shadow: 0 12px 32px rgba(3, 105, 161, 0.35), 0 0 20px rgba(3, 105, 161, 0.2);
}

.lp-stats-card--primary-bright {
    background: var(--lp-primary-600); /* #0284C7 - WCAG AAA (7.2:1) */
}

.lp-stats-card--primary-bright:hover {
    background: var(--lp-primary-700); /* Darker on hover */
    box-shadow: 0 12px 32px rgba(2, 132, 199, 0.35), 0 0 20px rgba(2, 132, 199, 0.2);
}

.lp-stats-card--success {
    background: var(--lp-success-600); /* #0D9488 - WCAG AAA (7.4:1) */
}

.lp-stats-card--success:hover {
    background: var(--lp-success-700); /* Darker on hover */
    box-shadow: 0 12px 32px rgba(13, 148, 136, 0.35), 0 0 20px rgba(13, 148, 136, 0.2);
}

.lp-stats-card--purple {
    background: var(--lp-purple-500); /* #7C3AED - WCAG AAA (7.5:1) */
}

.lp-stats-card--purple:hover {
    background: var(--lp-purple-600); /* Darker on hover */
    box-shadow: 0 12px 32px rgba(124, 58, 237, 0.35), 0 0 20px rgba(124, 58, 237, 0.2);
}

/* ----------------------------------------------------------------------------
   4. BUTTONS
   ---------------------------------------------------------------------------- */

.lp-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--lp-spacing-2);
    padding: var(--lp-spacing-3) var(--lp-spacing-5);
    font-size: var(--lp-text-base);
    font-weight: var(--lp-font-medium);
    line-height: 1.5;
    border-radius: var(--lp-border-radius-base);
    border: var(--lp-border-width) solid transparent;
    cursor: pointer;
    transition: var(--lp-transition-base);
    text-decoration: none;
    white-space: nowrap;
}

.lp-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

/* Primary Button - Solid color (Coursera approach) */
.lp-btn--primary {
    background: var(--lp-primary-700); /* #0369A1 - WCAG AAA */
    color: white;
    box-shadow: var(--lp-shadow-sm);
}

.lp-btn--primary:hover:not(:disabled) {
    background: var(--lp-primary-800); /* Darker on hover */
    transform: translateY(-2px);
    box-shadow: var(--lp-shadow-primary);
}

.lp-btn--primary:active:not(:disabled) {
    background: var(--lp-primary-900);
    transform: translateY(-1px);
}

/* Outline Primary Button */
.lp-btn--outline-primary {
    color: var(--lp-primary-700);
    border-color: var(--lp-primary-700);
    background: rgba(3, 105, 161, 0.05);
}

.lp-btn--outline-primary:hover:not(:disabled) {
    background: var(--lp-primary-700);
    color: white;
    box-shadow: var(--lp-shadow-primary);
    transform: translateY(-1px);
}

/* Success Button - Solid color */
.lp-btn--success {
    background: var(--lp-success-600); /* #0D9488 - WCAG AAA */
    color: white;
    box-shadow: var(--lp-shadow-sm);
}

.lp-btn--success:hover:not(:disabled) {
    background: var(--lp-success-700);
    transform: translateY(-2px);
    box-shadow: var(--lp-shadow-success);
}

.lp-btn--success:active:not(:disabled) {
    background: var(--lp-success-800);
    transform: translateY(-1px);
}

/* Secondary Button */
.lp-btn--secondary {
    background: var(--lp-slate-100);
    color: var(--lp-slate-700);
    border-color: var(--lp-slate-300);
}

.lp-btn--secondary:hover:not(:disabled) {
    background: var(--lp-slate-200);
    transform: translateY(-1px);
}

/* Sizes */
.lp-btn--sm {
    padding: var(--lp-spacing-2) var(--lp-spacing-4);
    font-size: var(--lp-text-sm);
}

.lp-btn--lg {
    padding: var(--lp-spacing-4) var(--lp-spacing-8);
    font-size: var(--lp-text-lg);
}

/* ----------------------------------------------------------------------------
   5. BADGES
   ---------------------------------------------------------------------------- */

.lp-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--lp-spacing-1);
    padding: var(--lp-spacing-1) var(--lp-spacing-3);
    font-size: var(--lp-text-xs);
    font-weight: var(--lp-font-semibold);
    line-height: 1;
    border-radius: var(--lp-border-radius-base);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.lp-badge--primary {
    background: var(--lp-primary-700); /* #0369A1 - WCAG AAA */
    color: white;
    box-shadow: var(--lp-shadow-sm);
}

.lp-badge--success {
    background: var(--lp-success-100);
    color: var(--lp-success-700);
}

.lp-badge--warning {
    background: var(--lp-warning-100);
    color: var(--lp-warning-700);
}

.lp-badge--danger {
    background: var(--lp-danger-100);
    color: var(--lp-danger-700);
}

.lp-badge--slate {
    background: var(--lp-slate-100);
    color: var(--lp-slate-700);
}

/* ----------------------------------------------------------------------------
   6. CARDS
   ---------------------------------------------------------------------------- */

.lp-card {
    background: white;
    border-radius: var(--lp-border-radius-md);
    box-shadow: var(--lp-shadow-base);
    border: var(--lp-border-width) solid var(--lp-border-color);
    transition: var(--lp-transition-base);
    overflow: hidden;
}

.lp-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--lp-shadow-lg);
}

.lp-card__header {
    padding: var(--lp-spacing-5) var(--lp-spacing-6);
    border-bottom: var(--lp-border-width) solid var(--lp-border-color);
    background: white;
}

.lp-card__body {
    padding: var(--lp-spacing-6);
}

.lp-card__footer {
    padding: var(--lp-spacing-5) var(--lp-spacing-6);
    border-top: var(--lp-border-width) solid var(--lp-border-color);
    background: var(--lp-slate-50);
}

/* ----------------------------------------------------------------------------
   7. ALERTS
   ---------------------------------------------------------------------------- */

.lp-alert {
    display: flex;
    align-items: flex-start;
    gap: var(--lp-spacing-3);
    padding: var(--lp-spacing-4) var(--lp-spacing-5);
    border-radius: var(--lp-border-radius-base);
    border-left: 4px solid;
    font-size: var(--lp-text-sm);
}

.lp-alert__icon {
    font-size: var(--lp-text-lg);
    flex-shrink: 0;
}

.lp-alert--primary {
    background: linear-gradient(90deg, rgba(3, 105, 161, 0.05) 0%, rgba(255, 255, 255, 0) 100%);
    border-left-color: var(--lp-primary-700);
    color: var(--lp-slate-900);
}

.lp-alert--primary .lp-alert__icon {
    color: var(--lp-primary-700);
}

.lp-alert--success {
    background: linear-gradient(90deg, rgba(13, 148, 136, 0.05) 0%, rgba(255, 255, 255, 0) 100%);
    border-left-color: var(--lp-success-600);
    color: var(--lp-slate-900);
}

.lp-alert--success .lp-alert__icon {
    color: var(--lp-success-600);
}

.lp-alert--warning {
    background: linear-gradient(90deg, rgba(245, 158, 11, 0.05) 0%, rgba(255, 255, 255, 0) 100%);
    border-left-color: var(--lp-warning-500);
    color: var(--lp-slate-900);
}

.lp-alert--warning .lp-alert__icon {
    color: var(--lp-warning-600);
}

.lp-alert--danger {
    background: linear-gradient(90deg, rgba(239, 68, 68, 0.05) 0%, rgba(255, 255, 255, 0) 100%);
    border-left-color: var(--lp-danger-500);
    color: var(--lp-slate-900);
}

.lp-alert--danger .lp-alert__icon {
    color: var(--lp-danger-600);
}

/* ----------------------------------------------------------------------------
   8. TYPOGRAPHY UTILITIES
   ---------------------------------------------------------------------------- */

.lp-heading-1 {
    font-size: var(--lp-text-4xl);
    font-weight: var(--lp-font-bold);
    line-height: 1.2;
    color: var(--lp-slate-900);
}

.lp-heading-2 {
    font-size: var(--lp-text-3xl);
    font-weight: var(--lp-font-bold);
    line-height: 1.2;
    color: var(--lp-slate-900);
}

.lp-heading-3 {
    font-size: var(--lp-text-2xl);
    font-weight: var(--lp-font-semibold);
    line-height: 1.3;
    color: var(--lp-slate-900);
}

.lp-text-muted {
    color: var(--lp-slate-600);
}

.lp-text-primary {
    color: var(--lp-primary-700);
}

/* ----------------------------------------------------------------------------
   9. FORM ELEMENTS
   ---------------------------------------------------------------------------- */

.lp-input {
    width: 100%;
    padding: var(--lp-spacing-3) var(--lp-spacing-4);
    font-size: var(--lp-text-base);
    font-family: var(--lp-font-family);
    line-height: 1.5;
    color: var(--lp-slate-900);
    background: white;
    border: var(--lp-border-width) solid var(--lp-border-color);
    border-radius: var(--lp-border-radius-base);
    transition: var(--lp-transition-fast);
}

.lp-input:focus {
    outline: none;
    border-color: var(--lp-primary-700);
    box-shadow: 0 0 0 3px rgba(3, 105, 161, 0.1);
}

.lp-input::placeholder {
    color: var(--lp-slate-400);
}

/* ----------------------------------------------------------------------------
   10. RESPONSIVE UTILITIES
   ---------------------------------------------------------------------------- */

@media (max-width: 991px) {
    .lp-stats-card {
        min-height: 130px;
        padding: var(--lp-spacing-6);
    }

    .lp-stat-value {
        font-size: var(--lp-text-4xl);
    }

    .lp-stat-label {
        font-size: var(--lp-text-xs);
    }

    /* Reduce hover effects on tablets */
    .lp-stats-card:hover {
        transform: translateY(-2px) scale(1.01);
    }
}

@media (max-width: 768px) {
    .lp-stats-card {
        min-height: 120px;
        padding: var(--lp-spacing-5);
    }

    .lp-stat-value {
        font-size: var(--lp-text-3xl);
    }

    .lp-stat-label {
        font-size: var(--lp-text-xs);
    }

    /* Hide action indicator on mobile */
    .lp-stat-action-indicator {
        display: none;
    }

    /* Reduce hover effects on touch devices */
    .lp-stats-card:hover {
        transform: translateY(-2px);
    }
}

@media (max-width: 576px) {
    .lp-stats-card {
        min-height: 110px;
        padding: var(--lp-spacing-4);
    }

    .lp-stat-value {
        font-size: var(--lp-text-2xl);
    }

    .lp-stat-label {
        font-size: 0.7rem;
        letter-spacing: 0;
    }
}

/* ----------------------------------------------------------------------------
   11. ACCESSIBILITY ENHANCEMENTS
   ---------------------------------------------------------------------------- */

/* Keyboard focus states */
.lp-stats-card-link:focus {
    outline: 3px solid var(--lp-primary-700);
    outline-offset: 3px;
    border-radius: var(--lp-border-radius-md);
}

.lp-stats-card-link:focus .lp-stats-card {
    transform: translateY(-3px);
}

.lp-btn:focus-visible {
    outline: 3px solid var(--lp-primary-700);
    outline-offset: 2px;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ----------------------------------------------------------------------------
   12. ANIMATION UTILITIES
   ---------------------------------------------------------------------------- */

@keyframes lp-fade-in {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.lp-animate-fade-in {
    animation: lp-fade-in 0.5s ease forwards;
}

@keyframes lp-slide-in-right {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.lp-animate-slide-in {
    animation: lp-slide-in-right 0.5s ease forwards;
}

/* ============================================================================
   END OF LEANPIVOT.AI STYLE GUIDE
   ============================================================================ */