/* API Management System - Clean & Modern UI Framework */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ===== CSS VARIABLES ===== */
:root {
    /* Modern Soft Colors */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #64748b;
    --success: #059669;
    --danger: #dc2626;
    --warning: #d97706;
    --info: #0284c7;
    
    /* Soft Backgrounds */
    --bg-primary: #ffffff;
    --bg-secondary: #fafafa;
    --bg-tertiary: #f5f5f5;
    --bg-card: #fdfdfd;
    --bg-soft: #f9fafb;
    
    /* Subtle Text Colors */
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --text-light: #d1d5db;
    
    /* Soft Gradients */
    --gradient-primary: linear-gradient(135deg, #e0e7ff 0%, #c7d2fe 100%);
    --gradient-success: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
    --gradient-danger: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    --gradient-warning: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    --gradient-info: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    
    /* Subtle Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Spacing */
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Transitions */
    --transition: all 0.3s ease;
}

/* ===== GLOBAL STYLES ===== */
* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

h1 { font-size: 2.25rem; font-weight: 700; }
h2 { font-size: 1.875rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--space-md);
    color: var(--text-secondary);
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-30px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(30px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

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

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-3px); }
    75% { transform: translateX(3px); }
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-5px); }
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* Animation Classes */
.fade-in { animation: fadeIn 0.6s ease-out; }
.fade-in-up { animation: fadeInUp 0.6s ease-out; }
.slide-in-left { animation: slideInLeft 0.6s ease-out; }
.slide-in-right { animation: slideInRight 0.6s ease-out; }
.pulse { animation: pulse 3s infinite; }
.spin { animation: spin 1s linear infinite; }
.shake { animation: shake 0.4s ease-in-out; }

/* ===== CARDS ===== */
.card {
    background: var(--bg-card);
    border: 1px solid #e5e7eb;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.modern-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(229, 231, 235, 0.6);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: var(--transition);
    position: relative;
}

.modern-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(99, 102, 241, 0.2);
}

.modern-card-header {
    padding: var(--space-lg);
    background: var(--bg-soft);
    border-bottom: 1px solid #f3f4f6;
}

.modern-card-body {
    padding: var(--space-lg);
}

/* ===== BUTTONS ===== */
.btn {
    font-weight: 500;
    border-radius: var(--radius-md);
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    border: 1px solid transparent;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    user-select: none;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    transition: left 0.5s ease;
}

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

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

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

.btn-success:hover {
    background: #047857;
    box-shadow: 0 4px 12px rgba(5, 150, 105, 0.3);
}

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

.btn-danger:hover {
    background: #b91c1c;
    box-shadow: 0 4px 12px rgba(220, 38, 38, 0.3);
}

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

.btn-warning:hover {
    background: #b45309;
    box-shadow: 0 4px 12px rgba(217, 119, 6, 0.3);
}

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

.btn-info:hover {
    background: #0369a1;
    box-shadow: 0 4px 12px rgba(2, 132, 199, 0.3);
}

.btn-outline-primary {
    color: var(--primary);
    border-color: var(--primary);
    background: transparent;
}

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

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

/* ===== FORMS ===== */
.form-control, .form-select {
    border: 1px solid #d1d5db;
    border-radius: var(--radius-md);
    padding: 0.75rem;
    font-size: 0.875rem;
    transition: var(--transition);
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    outline: none;
    transform: translateY(-1px);
}

.form-control.is-valid {
    border-color: var(--success);
}

.form-control.is-invalid {
    border-color: var(--danger);
    animation: shake 0.4s ease-in-out;
}

.form-label {
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

/* ===== ALERTS ===== */
.alert {
    border-radius: var(--radius-lg);
    border: none;
    padding: 1rem 1.25rem;
    margin-bottom: var(--space-lg);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

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

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

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

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

/* ===== BADGES ===== */
.badge {
    font-weight: 500;
    font-size: 0.75rem;
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-md);
}

.badge-soft-primary {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
}

.badge-soft-success {
    background: rgba(5, 150, 105, 0.1);
    color: var(--success);
}

.badge-soft-danger {
    background: rgba(220, 38, 38, 0.1);
    color: var(--danger);
}

.badge-soft-warning {
    background: rgba(217, 119, 6, 0.1);
    color: var(--warning);
}

.badge-soft-info {
    background: rgba(2, 132, 199, 0.1);
    color: var(--info);
}

/* ===== TABLES ===== */
.table {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.table th {
    background: var(--bg-soft);
    font-weight: 600;
    color: var(--text-primary);
    border-top: none;
    padding: 1rem;
}

.table td {
    padding: 1rem;
    vertical-align: middle;
    border-top: 1px solid #f3f4f6;
}

.table-hover tbody tr:hover {
    background: rgba(99, 102, 241, 0.05);
    transform: scale(1.005);
    transition: var(--transition);
}

/* ===== TOAST NOTIFICATIONS ===== */
.toast-container {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
    z-index: 9999;
    max-width: 400px;
}

.toast-notification {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 1rem 1.25rem;
    margin-bottom: 0.75rem;
    box-shadow: var(--shadow-xl);
    border-left: 4px solid var(--primary);
    transform: translateX(100%);
    opacity: 0;
    animation: slideInToast 0.4s ease-out forwards;
    position: relative;
    overflow: hidden;
}

.toast-notification.success { border-left-color: var(--success); }
.toast-notification.error { border-left-color: var(--danger); }
.toast-notification.warning { border-left-color: var(--warning); }
.toast-notification.info { border-left-color: var(--info); }

@keyframes slideInToast {
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ===== LOADING STATES ===== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.95);
    z-index: 9998;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(99, 102, 241, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary);
    animation: spin 1s linear infinite;
}

/* ===== UTILITY CLASSES ===== */
.text-gradient {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.bg-gradient-primary { background: var(--gradient-primary); }
.bg-gradient-success { background: var(--gradient-success); }
.bg-gradient-danger { background: var(--gradient-danger); }
.bg-gradient-warning { background: var(--gradient-warning); }
.bg-gradient-info { background: var(--gradient-info); }

.shadow-soft { box-shadow: var(--shadow-sm); }
.shadow-medium { box-shadow: var(--shadow-md); }
.shadow-strong { box-shadow: var(--shadow-lg); }

.rounded-soft { border-radius: var(--radius-md); }
.rounded-medium { border-radius: var(--radius-lg); }
.rounded-strong { border-radius: var(--radius-xl); }

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .container-fluid {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .toast-container {
        left: 1rem;
        right: 1rem;
        max-width: none;
    }
    
    .card:hover {
        transform: none;
    }
    
    .btn {
        padding: 0.75rem 1rem;
    }
    
    h1 { font-size: 1.875rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
}

@media (max-width: 576px) {
    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.25rem; }
    h3 { font-size: 1.125rem; }
    
    .btn-lg {
        padding: 0.75rem 1.25rem;
        font-size: 0.875rem;
    }
}

/* ===== SCROLLBAR STYLING ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: #f9fafb;
    border-radius: var(--radius-md);
}

::-webkit-scrollbar-thumb {
    background: #d1d5db;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

::-webkit-scrollbar-thumb:hover {
    background: #9ca3af;
}

/* ===== SELECTION STYLING ===== */
::selection {
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary);
}

/* ===== FOCUS STYLES ===== */
*:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}