/* 
   Readify Bookstore - Premium Style Extensions
   Extends existing designs with modern styles, skeletons, inline error displays, and accessible visual features.
*/

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    --primary: #4F46E5;
    --primary-hover: #4338CA;
    --primary-light: #EEECFF;
    --secondary: #7B61FF;
    --accent: #8B5CF6;
    --success: #10B981;
    --success-light: #ECFDF5;
    --danger: #EF4444;
    --danger-light: #FEF2F2;
    --warning: #F59E0B;
    --warning-light: #FEF3C7;
    --info: #3B82F6;
    --info-light: #EFF6FF;
    --text-dark: #0F172A;
    --text-light: #64748B;
    --text-muted: #94A3B8;
    --border-color: #E2E8F0;
    --bg-page: #F8FAFF;
    --white: #FFFFFF;
    --shadow-premium: 0 20px 40px -15px rgba(79, 70, 229, 0.12), 0 0 0 1px rgba(79, 70, 229, 0.02);
    --shadow-card: 0 10px 30px -5px rgba(15, 23, 42, 0.05), 0 0 0 1px rgba(15, 23, 42, 0.03);
    --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: #F8FAFF;
}
::-webkit-scrollbar-thumb {
    background: #CBD5E1;
    border-radius: 100px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

/* Focus Indicator Styles */
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 3px solid rgba(79, 70, 229, 0.4) !important;
    outline-offset: 2px !important;
}

/* Form Validation & Dynamic Feedback classes */
.form-input-container {
    position: relative;
    margin-bottom: 20px;
}

.form-control-premium {
    width: 100%;
    padding: 14px 18px;
    border: 1.5px solid var(--border-color);
    background-color: #FCFDFF;
    border-radius: var(--radius-md);
    font-size: 14.5px;
    color: var(--text-dark);
    transition: var(--transition);
    outline: none;
}

.form-control-premium:focus {
    border-color: var(--primary);
    background-color: var(--white);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
}

.form-control-premium.is-invalid {
    border-color: var(--danger) !important;
    background-color: var(--danger-light);
}

.form-control-premium.is-invalid:focus {
    box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.15) !important;
}

.form-control-premium.is-valid {
    border-color: var(--success) !important;
    background-color: var(--success-light);
}

.invalid-feedback-text {
    color: var(--danger);
    font-size: 12.5px;
    font-weight: 600;
    margin-top: 5px;
    display: flex;
    align-items: center;
    gap: 4px;
    animation: slideDownIn 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.valid-feedback-text {
    color: var(--success);
    font-size: 12.5px;
    font-weight: 600;
    margin-top: 5px;
    display: flex;
    align-items: center;
    gap: 4px;
}

@keyframes slideDownIn {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Password eye and power indicators */
.password-toggle-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
}

.password-toggle-btn {
    position: absolute;
    right: 16px;
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    padding: 4px;
    font-size: 14px;
    transition: color 0.2s;
}

.password-toggle-btn:hover {
    color: var(--text-dark);
}

.password-strength-container {
    margin-top: 8px;
    width: 100%;
}

.password-strength-bar {
    height: 4px;
    background-color: #E2E8F0;
    border-radius: 10px;
    overflow: hidden;
    display: flex;
    gap: 3px;
}

.password-strength-segment {
    flex: 1;
    height: 100%;
    background-color: transparent;
    transition: background-color 0.3s ease;
}

.password-strength-label {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-light);
    margin-top: 4px;
    display: block;
    text-transform: uppercase;
}

/* Skeleton Loading Animations */
.skeleton-box {
    display: inline-block;
    height: 1em;
    position: relative;
    overflow: hidden;
    background-color: #E2E8F0;
    border-radius: 4px;
}

.skeleton-box::after {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    transform: translateX(-100%);
    background-image: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.2) 20%,
        rgba(255, 255, 255, 0.5) 60%,
        rgba(255, 255, 255, 0) 100%
    );
    animation: shimmer 1.5s infinite;
    content: '';
}

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

.skeleton-product-card {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.skeleton-product-img {
    height: 220px;
    width: 100%;
    border-radius: var(--radius-md);
}

/* Premium Buttons */
.btn-premium-indigo {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--white) !important;
    font-weight: 700;
    padding: 14px 28px;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-shadow: 0 10px 20px -5px rgba(79, 70, 229, 0.3);
}

.btn-premium-indigo:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 25px -5px rgba(79, 70, 229, 0.4);
    opacity: 0.95;
}

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

.btn-premium-indigo:disabled {
    background: #CBD5E1;
    color: #94A3B8 !important;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-spinner {
    width: 18px;
    height: 18px;
    border: 2.5px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    display: inline-block;
    vertical-align: middle;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Glass Card */
.glass-panel {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.4);
}

/* Empty States styles */
.empty-state-container {
    text-align: center;
    padding: 60px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    max-width: 420px;
    margin: 0 auto;
}

.empty-state-icon {
    width: 80px;
    height: 80px;
    background-color: var(--primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 32px;
    margin-bottom: 8px;
}