/* Energy Ventures - Beautiful Modern UI Design System */

/* Design System - Color Palette */
:root {
    /* Primary Brand Colors */
    --brand-navy: #0A2540;
    --brand-cyan: #22D3EE;
    --brand-amber: #F59E0B;
    --brand-emerald: #16A34A;
    
    /* Extended Palette */
    --navy-light: #1E3A8A;
    --navy-dark: #051937;
    --cyan-light: #7DD3FC;
    --cyan-dark: #0891B2;
    --amber-light: #FDE68A;
    --amber-dark: #D97706;
    
    /* Neutral Colors */
    --neutral-900: #111827;
    --neutral-800: #1F2937;
    --neutral-700: #374151;
    --neutral-600: #4B5563;
    --neutral-500: #6B7280;
    --neutral-400: #9CA3AF;
    --neutral-300: #D1D5DB;
    --neutral-200: #E5E7EB;
    --neutral-100: #F3F4F6;
    --neutral-50: #F9FAFB;
    --white: #FFFFFF;
    
    /* Semantic Colors */
    --success: #16A34A;
    --success-light: #DCFCE7;
    --warning: #F59E0B;
    --warning-light: #FEF3C7;
    --error: #DC2626;
    --error-light: #FEE2E2;
    --info: #2563EB;
    --info-light: #DBEAFE;
    
    /* Spacing Scale (8px base) */
    --spacing-1: 0.25rem;  /* 4px */
    --spacing-2: 0.5rem;   /* 8px */
    --spacing-3: 0.75rem;  /* 12px */
    --spacing-4: 1rem;     /* 16px */
    --spacing-5: 1.25rem;  /* 20px */
    --spacing-6: 1.5rem;   /* 24px */
    --spacing-8: 2rem;     /* 32px */
    --spacing-10: 2.5rem;  /* 40px */
    --spacing-12: 3rem;    /* 48px */
    --spacing-16: 4rem;    /* 64px */
    --spacing-20: 5rem;    /* 80px */
    
    /* Border Radius */
    --radius-sm: 0.375rem;   /* 6px */
    --radius-md: 0.5rem;     /* 8px */
    --radius-lg: 0.75rem;    /* 12px */
    --radius-xl: 1rem;       /* 16px */
    --radius-2xl: 1.5rem;    /* 24px */
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    
    /* Transitions */
    --transition-fast: 0.15s ease-out;
    --transition-base: 0.2s ease-out;
    --transition-slow: 0.3s ease-out;
    
    /* Gradient Variables */
    --gradient-primary: linear-gradient(135deg, var(--brand-navy) 0%, var(--navy-light) 100%);
    --gradient-success: linear-gradient(135deg, var(--brand-emerald) 0%, #059669 100%);
    --gradient-energy: linear-gradient(135deg, var(--brand-cyan) 0%, var(--brand-navy) 100%);
    --gradient-warm: linear-gradient(135deg, var(--brand-amber) 0%, var(--amber-dark) 100%);
}

/* Base Typography */
html {
    font-size: 16px;
    line-height: 1.6;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-weight: 400;
    color: var(--neutral-800);
    background-color: var(--neutral-50);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    line-height: 1.2;
    color: var(--neutral-900);
    margin-bottom: var(--spacing-4);
}

h1 { font-size: 3rem; font-weight: 700; letter-spacing: -0.025em; }
h2 { font-size: 2.25rem; font-weight: 700; letter-spacing: -0.025em; }
h3 { font-size: 1.875rem; font-weight: 600; }
h4 { font-size: 1.5rem; font-weight: 600; }
h5 { font-size: 1.25rem; font-weight: 600; }
h6 { font-size: 1.125rem; font-weight: 600; }

p { margin-bottom: var(--spacing-4); }
small { font-size: 0.875rem; color: var(--neutral-600); }

/* Gradient Backgrounds */
.gradient-primary, .bg-gradient-primary {
    background: linear-gradient(135deg, var(--brand-navy) 0%, var(--navy-light) 100%);
}

.gradient-energy, .bg-gradient-energy {
    background: linear-gradient(135deg, var(--brand-cyan) 0%, var(--brand-navy) 100%);
}

.gradient-success, .bg-gradient-success {
    background: linear-gradient(135deg, var(--brand-emerald) 0%, #059669 100%);
}

.gradient-warm, .bg-gradient-warm {
    background: linear-gradient(135deg, var(--brand-amber) 0%, var(--amber-dark) 100%);
}

.gradient-mesh {
    background: linear-gradient(135deg, var(--brand-navy) 0%, var(--navy-light) 25%, var(--brand-cyan) 50%, var(--cyan-dark) 75%, var(--brand-navy) 100%);
    background-size: 400% 400%;
    animation: gradientShift 8s ease infinite;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Layout Components */
.main-content {
    min-height: calc(100vh - 120px);
    padding-top: var(--spacing-8);
}

/* Navigation */
.navbar {
    backdrop-filter: blur(10px);
    background: rgba(10, 37, 64, 0.95) !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-sm);
}

.navbar-brand {
    font-family: 'Poppins', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white) !important;
    text-decoration: none;
}

.navbar-nav .nav-link {
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9) !important;
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-md);
    margin: 0 var(--spacing-1);
    transition: all var(--transition-base);
}

.navbar-nav .nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--brand-cyan) !important;
}

/* Hero Section */
.hero-section {
    background: var(--brand-navy);
    position: relative;
    overflow: hidden;
    min-height: 70vh;
    display: flex;
    align-items: center;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--brand-navy) 0%, var(--navy-light) 50%, var(--brand-cyan) 100%);
    opacity: 0.9;
}

.hero-section::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="dots" width="20" height="20" patternUnits="userSpaceOnUse"><circle cx="10" cy="10" r="1" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100%" height="100%" fill="url(%23dots)"/></svg>');
}

.hero-section .container {
    position: relative;
    z-index: 2;
}

.hero-section h1 {
    color: var(--white);
    margin-bottom: var(--spacing-6);
}

.hero-section p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-8);
}

/* Card Components */
.card {
    border: none;
    border-radius: var(--radius-xl);
    background: var(--white);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.card-header {
    background: var(--white);
    border-bottom: 1px solid var(--neutral-200);
    padding: var(--spacing-6) var(--spacing-6) var(--spacing-4);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.card-body {
    padding: var(--spacing-6);
}

/* Dashboard Stats Cards */
.stat-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    box-shadow: var(--shadow-md);
    border: none;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--brand-cyan), var(--brand-navy));
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.stat-card.primary {
    background: var(--gradient-primary);
    color: var(--white);
}

.stat-card.primary::before {
    background: rgba(255, 255, 255, 0.3);
}

.stat-card.success {
    background: var(--gradient-success);
    color: var(--white);
}

.stat-card.info {
    background: linear-gradient(135deg, var(--info) 0%, #1E40AF 100%);
    color: var(--white);
}

.stat-card.warning {
    background: var(--gradient-warm);
    color: var(--white);
}

/* Button Components */
.btn {
    font-family: 'Inter', sans-serif;
    font-weight: 500;
    padding: var(--spacing-3) var(--spacing-6);
    border-radius: var(--radius-lg);
    border: none;
    transition: all var(--transition-base);
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: 0.875rem;
}

.btn-sm {
    padding: var(--spacing-2) var(--spacing-4);
    font-size: 0.75rem;
}

.btn-lg {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: 1.125rem;
    border-radius: var(--radius-xl);
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--navy-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
    color: var(--white);
}

.btn-success {
    background: var(--gradient-success);
    color: var(--white);
}

.btn-success:hover {
    background: #059669;
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
    color: var(--white);
}

.btn-outline-primary {
    background: transparent;
    color: var(--brand-navy);
    border: 2px solid var(--brand-navy);
}

.btn-outline-primary:hover {
    background: var(--brand-navy);
    color: var(--white);
    transform: translateY(-1px);
}

.btn-outline-secondary {
    background: transparent;
    color: var(--neutral-600);
    border: 2px solid var(--neutral-300);
}

.btn-outline-secondary:hover {
    background: var(--neutral-600);
    color: var(--white);
    border-color: var(--neutral-600);
}

/* Fix button contrast issues */
.btn-outline-light {
    background: rgba(255, 255, 255, 0.1) !important;
    color: var(--white) !important;
    border: 2px solid rgba(255, 255, 255, 0.5) !important;
    backdrop-filter: blur(10px);
    font-weight: 600;
}

.btn-outline-light:hover, .btn-outline-light:focus, .btn-outline-light:active {
    background: var(--white) !important;
    color: var(--brand-navy) !important;
    border-color: var(--white) !important;
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

/* Ensure all buttons have minimum contrast */
.btn {
    position: relative;
    overflow: hidden;
    font-weight: 500 !important;
}

.btn:not(.btn-outline-light):not(.btn-outline-primary):not(.btn-outline-secondary) {
    color: var(--white) !important;
}

.btn-primary, .btn-success, .btn-info, .btn-warning, .btn-danger {
    color: var(--white) !important;
}

.btn-primary:hover, .btn-success:hover, .btn-info:hover, 
.btn-warning:hover, .btn-danger:hover {
    color: var(--white) !important;
}

/* Specific fixes for navigation buttons */
.navbar .btn-outline-light {
    min-height: 44px; /* Touch-friendly size */
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* Form Components */
.form-label {
    font-weight: 600;
    color: var(--neutral-800);
    margin-bottom: var(--spacing-2);
    font-size: 0.875rem;
}

.form-control {
    padding: var(--spacing-3) var(--spacing-4);
    border: 2px solid var(--neutral-200);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    transition: all var(--transition-base);
    background-color: var(--white);
}

.form-control:focus {
    border-color: var(--brand-cyan);
    box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.1);
    outline: none;
}

.form-select {
    padding: var(--spacing-3) var(--spacing-4);
    border: 2px solid var(--neutral-200);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    background-color: var(--white);
    transition: all var(--transition-base);
}

.form-select:focus {
    border-color: var(--brand-cyan);
    box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.1);
    outline: none;
}

.input-group-text {
    background-color: var(--neutral-100);
    border: 2px solid var(--neutral-200);
    border-right: none;
    color: var(--neutral-600);
    font-weight: 500;
    border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.input-group .form-control {
    border-left: none;
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

.input-group:focus-within .input-group-text {
    border-color: var(--brand-cyan);
    background-color: rgba(34, 211, 238, 0.05);
}

.input-group:focus-within .form-control {
    border-color: var(--brand-cyan);
}

/* Alert Components */
.alert {
    padding: var(--spacing-4) var(--spacing-5);
    border-radius: var(--radius-xl);
    border: none;
    margin-bottom: var(--spacing-5);
    font-weight: 500;
}

.alert-info {
    background-color: var(--info-light);
    color: var(--info);
    border-left: 4px solid var(--info);
}

.alert-success {
    background-color: var(--success-light);
    color: var(--success);
    border-left: 4px solid var(--success);
}

.alert-warning {
    background-color: var(--warning-light);
    color: var(--warning);
    border-left: 4px solid var(--warning);
}

.alert-danger {
    background-color: var(--error-light);
    color: var(--error);
    border-left: 4px solid var(--error);
}

/* Badge Components */
.badge {
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-success { background-color: var(--success-light); color: var(--success); }
.badge-warning { background-color: var(--warning-light); color: var(--warning); }
.badge-info { background-color: var(--info-light); color: var(--info); }
.badge-secondary { background-color: var(--neutral-100); color: var(--neutral-600); }

/* Feature Cards */
.feature-card {
    text-align: center;
    padding: var(--spacing-8);
    border-radius: var(--radius-2xl);
    background: var(--white);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-slow);
    border: 1px solid var(--neutral-100);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
    border-color: var(--brand-cyan);
}

.feature-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin: 0 auto var(--spacing-6);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--white);
    background: var(--gradient-energy);
}

/* Step Cards */
.step-card {
    position: relative;
    padding: var(--spacing-6);
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.step-number {
    position: absolute;
    top: -15px;
    left: var(--spacing-6);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gradient-energy);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.125rem;
    box-shadow: var(--shadow-md);
}

/* Chart Theming */
.chart-container {
    position: relative;
    height: 300px;
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-4);
}

/* Loading States */
.loading-skeleton {
    background: linear-gradient(90deg, var(--neutral-200) 25%, var(--neutral-100) 50%, var(--neutral-200) 75%);
    background-size: 200% 100%;
    animation: loading 2s infinite;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--neutral-200);
    border-top: 3px solid var(--brand-cyan);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

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

/* Utility Classes */
.text-gradient {
    background: linear-gradient(135deg, var(--brand-cyan), var(--brand-navy));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.bg-mesh {
    background: var(--gradient-mesh);
}

.glass-effect {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Mobile-First Responsive Design */
@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    
    .hero-section {
        min-height: 60vh;
        text-align: center;
        padding: var(--spacing-16) 0;
    }
    
    .feature-card {
        padding: var(--spacing-6);
    }
    
    .feature-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
    
    .btn-lg {
        padding: var(--spacing-3) var(--spacing-6);
        font-size: 1rem;
        min-height: 44px; /* Touch target minimum */
    }
    
    .card-body {
        padding: var(--spacing-5);
    }
    
    .stat-card {
        padding: var(--spacing-5);
    }
    
    /* Mobile table fixes */
    .table-responsive {
        font-size: 0.875rem;
    }
    
    /* Better mobile forms */
    .form-control {
        min-height: 44px;
        font-size: 16px; /* Prevent zoom on iOS */
    }
    
    /* Mobile navigation improvements */
    .navbar-toggler {
        padding: 8px 12px;
        border: none;
        background-color: rgba(255, 255, 255, 0.1);
    }
    
    .navbar-toggler:focus {
        box-shadow: none;
    }
}

/* iPhone 13 mini and smaller screens optimization */
@media (max-width: 576px) {
    /* Root adjustments for smaller screens */
    html {
        font-size: 15px; /* Slightly smaller base font */
    }
    
    h1 { font-size: 2rem; line-height: 1.1; }
    h2 { font-size: 1.75rem; }
    
    .hero-section {
        min-height: 50vh;
        padding: var(--spacing-12) 0;
    }
    
    .hero-section h1 {
        font-size: 2.5rem;
        line-height: 1.1;
        margin-bottom: var(--spacing-4);
    }
    
    .hero-section p {
        font-size: 1.125rem;
        margin-bottom: var(--spacing-6);
    }
    
    .navbar-brand { 
        font-size: 1.125rem;
    }
    
    .navbar-brand img {
        height: 28px !important;
        width: 28px !important;
        margin-right: 6px !important;
    }
    
    .card-body, .stat-card {
        padding: var(--spacing-4);
    }
    
    .btn {
        padding: var(--spacing-3) var(--spacing-5);
        min-height: 44px;
        font-size: 0.875rem;
    }
    
    .btn-lg {
        padding: var(--spacing-4) var(--spacing-6);
        font-size: 1rem;
        min-height: 48px;
    }
    
    .feature-card {
        padding: var(--spacing-5);
        margin-bottom: var(--spacing-4);
    }
    
    /* Mobile-optimized input groups */
    .input-group-text {
        padding: var(--spacing-3);
        min-width: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    /* Better mobile spacing */
    .container {
        padding-left: 16px;
        padding-right: 16px;
    }
    
    /* Mobile dashboard optimizations */
    .stat-card h3 {
        font-size: 1.5rem;
    }
    
    .stat-card h6 {
        font-size: 0.875rem;
    }
    
    /* Mobile-friendly dropdowns */
    .dropdown-menu {
        border-radius: var(--radius-lg);
        border: none;
        box-shadow: var(--shadow-xl);
        min-width: 200px;
    }
    
    .dropdown-item {
        padding: var(--spacing-3) var(--spacing-4);
        font-size: 0.875rem;
    }
    
    /* Touch-friendly alert dismissal */
    .btn-close {
        width: 44px;
        height: 44px;
        padding: 0;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    /* Mobile chart adjustments */
    .chart-container {
        height: 250px;
        padding: var(--spacing-3);
    }
}

/* Ultra-small screens (iPhone SE, etc.) */
@media (max-width: 375px) {
    html {
        font-size: 14px;
    }
    
    .hero-section h1 {
        font-size: 2rem;
    }
    
    .btn-lg {
        padding: var(--spacing-3) var(--spacing-4);
        font-size: 0.875rem;
    }
    
    .container {
        padding-left: 12px;
        padding-right: 12px;
    }
    
    .card-body {
        padding: var(--spacing-3);
    }
    
    .feature-icon {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }
    
    .stat-card {
        padding: var(--spacing-3);
    }
    
    .stat-card h3 {
        font-size: 1.25rem;
    }
}

/* Landscape orientation adjustments for mobile */
@media (max-height: 500px) and (orientation: landscape) {
    .hero-section {
        min-height: 90vh;
        padding: var(--spacing-8) 0;
    }
    
    .hero-section h1 {
        font-size: 2rem;
        margin-bottom: var(--spacing-3);
    }
    
    .hero-section p {
        font-size: 1rem;
        margin-bottom: var(--spacing-4);
    }
}

/* Safe area adjustments for iPhone notch */
@supports (padding-top: env(safe-area-inset-top)) {
    .navbar {
        padding-top: env(safe-area-inset-top);
    }
    
    body {
        padding-left: env(safe-area-inset-left);
        padding-right: env(safe-area-inset-right);
        padding-bottom: env(safe-area-inset-bottom);
    }
}

/* Touch enhancements */
.btn:active {
    transform: scale(0.98);
}

.card:active {
    transform: scale(0.995);
}

/* Improve tap targets */
a, button, .btn, .form-control, .dropdown-toggle {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
}

/* Better focus states for accessibility */
.btn:focus, .form-control:focus, .dropdown-toggle:focus {
    outline: 3px solid rgba(34, 211, 238, 0.3);
    outline-offset: 2px;
}

/* Disable text selection on buttons */
.btn {
    -webkit-user-select: none;
    -moz-user-select: none;
    user-select: none;
}

/* Print Styles */
@media print {
    .navbar, .btn, footer, .hero-section::before, .hero-section::after {
        display: none !important;
    }
    
    body {
        background: var(--white) !important;
        color: var(--neutral-900) !important;
    }
    
    .card {
        border: 1px solid var(--neutral-300) !important;
        box-shadow: none !important;
        break-inside: avoid;
    }
    
    h1, h2, h3, h4, h5, h6 {
        color: var(--neutral-900) !important;
    }
}

/* Dark mode support (optional future enhancement) */
@media (prefers-color-scheme: dark) {
    /* Add dark mode styles here if needed */
}