/* Dark Theme - Professional & Calming */
:root {
    /* Deep blue-gray base colors for a calming effect */
    --dark-bg-primary: #0d1117;        /* Deep dark blue - main background */
    --dark-bg-secondary: #161b22;      /* Slightly lighter - cards/sections */
    --dark-bg-tertiary: #21262d;       /* Even lighter - hover states */

    /* Soft, calming accent colors */
    --dark-primary: #58a6ff;           /* Soft blue - primary actions */
    --dark-primary-hover: #79c0ff;     /* Lighter blue - hover state */
    --dark-accent: #a371f7;            /* Soft purple - special highlights */
    --dark-success: #3fb950;           /* Muted green */
    --dark-warning: #d29922;           /* Warm amber */
    --dark-danger: #f85149;            /* Soft red */

    /* Text colors for optimal readability */
    --dark-text-primary: #c9d1d9;      /* Off-white - main text */
    --dark-text-secondary: #8b949e;    /* Muted gray - secondary text */
    --dark-text-muted: #6e7681;        /* Darker gray - muted text */

    /* Borders and dividers */
    --dark-border: #30363d;            /* Subtle borders */
    --dark-border-light: #21262d;      /* Very subtle borders */

    /* Shadow for depth */
    --dark-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    --dark-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* Apply dark theme to body */
[data-bs-theme="dark"] {
    background-color: var(--dark-bg-primary) !important;
    color: var(--dark-text-primary) !important;
}

/* Override Bootstrap's dark theme colors */
[data-bs-theme="dark"] {
    --bs-primary: var(--dark-primary);
    --bs-body-bg: var(--dark-bg-primary);
    --bs-body-color: var(--dark-text-primary);
    --bs-secondary-bg: var(--dark-bg-secondary);
    --bs-tertiary-bg: var(--dark-bg-tertiary);
    --bs-border-color: var(--dark-border);
}

/* Navigation */
[data-bs-theme="dark"] .navbar {
    background: linear-gradient(135deg, var(--dark-bg-secondary) 0%, var(--dark-bg-tertiary) 100%) !important;
    border-bottom: 1px solid var(--dark-border);
    backdrop-filter: blur(10px);
}

[data-bs-theme="dark"] .navbar-brand {
    color: var(--dark-primary) !important;
    font-weight: 600;
}

[data-bs-theme="dark"] .navbar-nav .nav-link {
    color: var(--dark-text-secondary) !important;
    transition: color 0.3s ease;
}

[data-bs-theme="dark"] .navbar-nav .nav-link:hover,
[data-bs-theme="dark"] .navbar-nav .nav-link.active {
    color: var(--dark-primary) !important;
}

/* Cards */
[data-bs-theme="dark"] .card {
    background: var(--dark-bg-secondary);
    border: 1px solid var(--dark-border);
    box-shadow: var(--dark-shadow-sm);
    transition: all 0.3s ease;
}

[data-bs-theme="dark"] .card:hover {
    transform: translateY(-2px);
    box-shadow: var(--dark-shadow);
    border-color: var(--dark-primary);
}

[data-bs-theme="dark"] .card-body {
    background: transparent;
}

[data-bs-theme="dark"] .card-footer {
    background: var(--dark-bg-tertiary);
    border-top: 1px solid var(--dark-border);
}

/* Buttons */
[data-bs-theme="dark"] .btn-primary {
    background: linear-gradient(135deg, var(--dark-primary) 0%, var(--dark-accent) 100%);
    border: none;
    color: white;
    font-weight: 500;
    transition: all 0.3s ease;
}

[data-bs-theme="dark"] .btn-primary:hover {
    background: linear-gradient(135deg, var(--dark-primary-hover) 0%, var(--dark-accent) 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(88, 166, 255, 0.3);
}

[data-bs-theme="dark"] .btn-outline-primary {
    color: var(--dark-primary);
    border-color: var(--dark-primary);
    background: transparent;
}

[data-bs-theme="dark"] .btn-outline-primary:hover {
    background: rgba(88, 166, 255, 0.1);
    border-color: var(--dark-primary-hover);
    color: var(--dark-primary-hover);
}

/* Badges */
[data-bs-theme="dark"] .badge {
    font-weight: 500;
}

[data-bs-theme="dark"] .badge.bg-light {
    background: var(--dark-bg-tertiary) !important;
    color: var(--dark-text-primary) !important;
    border: 1px solid var(--dark-border);
}

[data-bs-theme="dark"] .badge.bg-secondary {
    background: var(--dark-accent) !important;
    color: white !important;
}

/* Sections */
[data-bs-theme="dark"] .bg-light {
    background: var(--dark-bg-secondary) !important;
}

[data-bs-theme="dark"] section {
    border-bottom: 1px solid var(--dark-border-light);
}

/* Text colors */
[data-bs-theme="dark"] .text-muted {
    color: var(--dark-text-secondary) !important;
}

[data-bs-theme="dark"] .text-primary {
    color: var(--dark-primary) !important;
}

[data-bs-theme="dark"] h1,
[data-bs-theme="dark"] h2,
[data-bs-theme="dark"] h3,
[data-bs-theme="dark"] h4,
[data-bs-theme="dark"] h5 {
    color: var(--dark-text-primary);
}

/* Forms */
[data-bs-theme="dark"] .form-control,
[data-bs-theme="dark"] .form-select {
    background: var(--dark-bg-tertiary);
    border: 1px solid var(--dark-border);
    color: var(--dark-text-primary);
}

[data-bs-theme="dark"] .form-control:focus,
[data-bs-theme="dark"] .form-select:focus {
    background: var(--dark-bg-tertiary);
    border-color: var(--dark-primary);
    color: var(--dark-text-primary);
    box-shadow: 0 0 0 0.25rem rgba(88, 166, 255, 0.25);
}

[data-bs-theme="dark"] .form-label {
    color: var(--dark-text-secondary);
}

/* Alerts */
[data-bs-theme="dark"] .alert-success {
    background: rgba(63, 185, 80, 0.1);
    border: 1px solid var(--dark-success);
    color: var(--dark-success);
}

/* Footer */
[data-bs-theme="dark"] footer {
    background: var(--dark-bg-secondary) !important;
    border-top: 1px solid var(--dark-border);
}

/* Special effects for book cards */
[data-bs-theme="dark"] .bg-success {
    background: linear-gradient(135deg, #2ea043 0%, #3fb950 100%) !important;
}

[data-bs-theme="dark"] .bg-info {
    background: linear-gradient(135deg, #1f6feb 0%, #58a6ff 100%) !important;
}

[data-bs-theme="dark"] .bg-warning {
    background: linear-gradient(135deg, #bb8009 0%, #d29922 100%) !important;
}

/* Star ratings */
[data-bs-theme="dark"] .text-warning {
    color: #d29922 !important;
}

/* Smooth transitions */
[data-bs-theme="dark"] * {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* Theme toggle button */
.theme-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--dark-primary);
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: var(--dark-shadow);
    z-index: 1000;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 24px rgba(88, 166, 255, 0.4);
}

[data-bs-theme="light"] .theme-toggle {
    background: var(--bs-primary);
    color: white;
}

/* Subtle gradient overlays for depth */
[data-bs-theme="dark"] .hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(88, 166, 255, 0.05) 0%, rgba(163, 113, 247, 0.05) 100%);
    pointer-events: none;
}

/* Scrollbar styling for dark theme */
[data-bs-theme="dark"] ::-webkit-scrollbar {
    width: 12px;
}

[data-bs-theme="dark"] ::-webkit-scrollbar-track {
    background: var(--dark-bg-secondary);
}

[data-bs-theme="dark"] ::-webkit-scrollbar-thumb {
    background: var(--dark-bg-tertiary);
    border-radius: 6px;
}

[data-bs-theme="dark"] ::-webkit-scrollbar-thumb:hover {
    background: var(--dark-border);
}

/* Profile photo styling for better blending */
.profile-photo-container {
    position: relative;
    display: block;
    width: 100%;
}

/* Dark mode styling */
[data-bs-theme="dark"] .profile-photo-container::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(13, 17, 23, 0.2), rgba(88, 166, 255, 0.08));
    border-radius: 0.5rem;
    pointer-events: none;
}

[data-bs-theme="dark"] .profile-photo {
    border: 4px solid var(--dark-bg-tertiary);
    filter: brightness(0.92) saturate(0.9);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

/* Light mode styling */
[data-bs-theme="light"] .profile-photo {
    border: 4px solid #e9ecef;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

/* Ensure proper sizing on different screens */
@media (max-width: 991px) {
    .profile-photo-container {
        max-width: 450px;
        margin: 0 auto;
    }
}

@media (max-width: 767px) {
    .profile-photo-container {
        max-width: 100%;
        margin: 0 auto;
    }
}