/* =========================================================
   NeonByte Gaming - shared stylesheet (Bootstrap 5 theme)
   Assignments 3-5. Layout comes from the Bootstrap grid and
   spacing from Bootstrap utilities (m-*, p-*). This file sets
   colours, component styles and JS-driven effects.

   Assignment 5: all colours are CSS variables (--nb-*), so the
   Day / Night switch only has to change data-bs-theme on <html>.
   The navbar and footer keep data-bs-theme="dark" in both modes.
   ========================================================= */

/* ---------- Theme palettes ---------- */
/* Night theme (default) */
:root,
[data-bs-theme="dark"] {
    --nb-bg: #12101c;
    --nb-bg-rgb: 18, 16, 28;
    --nb-panel: #1c1930;
    --nb-panel-rgb: 28, 25, 48;
    --nb-border: #322a52;
    --nb-text: #e8e6f0;
    --nb-text-rgb: 232, 230, 240;
    --nb-muted: #a8a3bd;                      /* 6.9:1 on panel */
    --nb-heading: #22d3ee;
    --nb-cyan: #22d3ee;
    --nb-cyan-rgb: 34, 211, 238;
    --nb-purple: #7c3aed;
    --nb-purple-soft: #c4b5fd;
    --nb-link-hover: #a78bfa;
    --nb-link-hover-rgb: 167, 139, 250;
    --nb-stripe: #241f3d;
    --nb-row-hover: #2e2650;
    --nb-overlay: rgba(18, 16, 28, 0.85);
    --nb-star-off: #4b4470;
    --nb-danger: #f87171;
}

/* Day theme */
:root[data-bs-theme="light"] {
    --nb-bg: #f4f2fb;
    --nb-bg-rgb: 244, 242, 251;
    --nb-panel: #ffffff;
    --nb-panel-rgb: 255, 255, 255;
    --nb-border: #d9d2f3;
    --nb-text: #1e1b2e;
    --nb-text-rgb: 30, 27, 46;
    --nb-muted: #57526b;                      /* 7:1 on white */
    --nb-heading: #5b21b6;
    --nb-cyan: #0e7490;                       /* darker cyan for contrast on light */
    --nb-cyan-rgb: 14, 116, 144;
    --nb-purple: #7c3aed;
    --nb-purple-soft: #6d28d9;
    --nb-link-hover: #5b21b6;
    --nb-link-hover-rgb: 91, 33, 182;
    --nb-stripe: #f1edfc;
    --nb-row-hover: #e9e3fb;
    --nb-overlay: rgba(30, 27, 46, 0.6);
    --nb-star-off: #cfc8e6;
    --nb-danger: #b91c1c;
}

/* ---------- Bootstrap CSS variables -> our palette ---------- */
:root[data-bs-theme],
[data-bs-theme] {
    --bs-body-font-family: 'Segoe UI', Tahoma, Verdana, sans-serif;
    --bs-body-bg: var(--nb-bg);
    --bs-body-bg-rgb: var(--nb-bg-rgb);
    --bs-body-color: var(--nb-text);
    --bs-body-color-rgb: var(--nb-text-rgb);
    --bs-secondary-color: var(--nb-muted);
    --bs-heading-color: var(--nb-heading);
    --bs-border-color: var(--nb-border);
    --bs-tertiary-bg: var(--nb-panel);         /* .bg-body-tertiary = panel */
    --bs-tertiary-bg-rgb: var(--nb-panel-rgb);
    --bs-dark-rgb: 28, 25, 48;                  /* .bg-dark = navbar / footer */
    --bs-primary: #7c3aed;
    --bs-primary-rgb: 124, 58, 237;             /* .border-primary = neon purple */
    --bs-info: var(--nb-cyan);
    --bs-info-rgb: var(--nb-cyan-rgb);          /* .text-info / .border-info */
    --bs-link-color: var(--nb-cyan);
    --bs-link-color-rgb: var(--nb-cyan-rgb);
    --bs-link-hover-color: var(--nb-link-hover);
    --bs-link-hover-color-rgb: var(--nb-link-hover-rgb);
}

/* Smooth colour change when the theme is switched */
body,
.card,
.bg-body-tertiary,
.custom-accordion-item {
    transition: background-color 0.4s ease, color 0.4s ease, border-color 0.4s ease;
}

/* ---------- Navbar link states ---------- */
.navbar .nav-link {
    color: #e8e6f0;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.navbar .nav-link:hover,
.navbar .nav-link:focus-visible,
.navbar .nav-link.active {
    background-color: #7c3aed;
    color: #ffffff;
}

/* ---------- Buttons: Bootstrap button variables re-coloured ---------- */
.btn-primary {
    --bs-btn-color: #ffffff;
    --bs-btn-bg: #7c3aed;
    --bs-btn-border-color: #7c3aed;
    --bs-btn-hover-color: #ffffff;
    --bs-btn-hover-bg: #6d28d9;
    --bs-btn-hover-border-color: #6d28d9;
    --bs-btn-active-color: #ffffff;
    --bs-btn-active-bg: #5b21b6;
    --bs-btn-active-border-color: #5b21b6;
    --bs-btn-disabled-color: #ffffff;
    --bs-btn-disabled-bg: #7c3aed;
    --bs-btn-disabled-border-color: #7c3aed;
    --bs-btn-focus-shadow-rgb: 124, 58, 237;
}

.btn-outline-primary {
    --bs-btn-color: var(--nb-purple-soft);
    --bs-btn-border-color: #7c3aed;
    --bs-btn-hover-color: #ffffff;
    --bs-btn-hover-bg: #7c3aed;
    --bs-btn-hover-border-color: #7c3aed;
    --bs-btn-active-color: #ffffff;
    --bs-btn-active-bg: #6d28d9;
    --bs-btn-active-border-color: #6d28d9;
    --bs-btn-focus-shadow-rgb: 124, 58, 237;
}

.btn-outline-info {
    --bs-btn-color: var(--nb-cyan);
    --bs-btn-border-color: var(--nb-cyan);
    --bs-btn-hover-color: var(--nb-bg);
    --bs-btn-hover-bg: var(--nb-cyan);
    --bs-btn-hover-border-color: var(--nb-cyan);
    --bs-btn-active-color: var(--nb-bg);
    --bs-btn-active-bg: var(--nb-cyan);
    --bs-btn-active-border-color: var(--nb-cyan);
}

/* "Light" outline buttons are white; in the Day theme they need dark text */
:root[data-bs-theme="light"] .btn-outline-light {
    --bs-btn-color: var(--nb-text);
    --bs-btn-border-color: var(--nb-border);
    --bs-btn-hover-color: var(--nb-text);
    --bs-btn-hover-bg: var(--nb-stripe);
    --bs-btn-hover-border-color: var(--nb-border);
    --bs-btn-active-color: var(--nb-text);
    --bs-btn-active-bg: var(--nb-row-hover);
    --bs-btn-active-border-color: var(--nb-border);
    --bs-btn-disabled-color: var(--nb-muted);
    --bs-btn-disabled-border-color: var(--nb-border);
}

/* ---------- Cards ---------- */
.card {
    --bs-card-bg: var(--nb-panel);
    --bs-card-border-color: var(--nb-border);
}

.nb-card {
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.nb-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 10px 24px rgba(124, 58, 237, 0.35);
    border-color: #7c3aed;
}

.nb-card-img {
    height: 180px;
    object-fit: cover;
}

/* Circular profile image (border-radius: 50% via .rounded-circle) */
.nb-profile-img {
    width: 140px;
    height: 140px;
    object-fit: cover;
}

.nb-banner {
    height: 220px;
    object-fit: cover;
}

.nb-highlight {
    --bs-card-bg: rgba(124, 58, 237, 0.12);
}

/* Sidebar list with cyan accent (like Assignment 2) */
.nb-list-item {
    background-color: var(--nb-bg);
    border-left: 3px solid var(--nb-cyan);
}

/* ---------- Table ---------- */
.nb-table {
    --bs-table-bg: var(--nb-panel);
    --bs-table-color: var(--nb-text);
    --bs-table-border-color: var(--nb-border);
    --bs-table-striped-bg: var(--nb-stripe);
    --bs-table-striped-color: var(--nb-text);
    --bs-table-hover-bg: var(--nb-row-hover);
    --bs-table-hover-color: var(--nb-text);
}

.nb-table thead th {
    --bs-table-bg: #7c3aed;
    --bs-table-color: #ffffff;
}

/* ---------- Forms ---------- */
.form-control:focus,
.form-select:focus,
.form-check-input:focus {
    border-color: var(--nb-cyan);
    box-shadow: 0 0 0 0.25rem rgba(var(--nb-cyan-rgb), 0.25);
}

.form-check-input:checked {
    background-color: #7c3aed;
    border-color: #7c3aed;
}

/* ---------- Carousel ---------- */
.carousel-item img {
    aspect-ratio: 640 / 420;
    object-fit: cover;
}

/* Bootstrap's dark mode turns carousel arrows/indicators black;
   keep them white so they stay visible on our images */
:root[data-bs-theme="dark"] .carousel .carousel-control-prev-icon,
:root[data-bs-theme="dark"] .carousel .carousel-control-next-icon {
    filter: none;
}

:root[data-bs-theme="dark"] .carousel .carousel-indicators [data-bs-target] {
    background-color: #ffffff;
}

/* =========================================================
   Assignment 4: JS features
   ========================================================= */

/* Task 2: Custom Accordion */
.custom-accordion-item {
    border: 1px solid var(--nb-border);
    border-radius: 8px;
    background-color: var(--nb-panel);
    overflow: hidden;
    margin-bottom: 1rem;
}

.custom-accordion-header {
    width: 100%;
    padding: 1.2rem;
    background: none;
    border: none;
    color: var(--nb-cyan);
    font-weight: 600;
    font-size: 1.1rem;
    text-align: left;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.custom-accordion-header:hover {
    background-color: rgba(124, 58, 237, 0.15);
}

.custom-accordion-header::after {
    content: '+';
    font-size: 1.5rem;
    color: #7c3aed;
    transition: transform 0.3s ease;
}

.custom-accordion-item.active .custom-accordion-header::after {
    content: '−';
    transform: rotate(180deg);
}

.custom-accordion-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-out;
    padding: 0 1.2rem;
    color: var(--nb-text);
}

.custom-accordion-item.active .custom-accordion-body {
    padding: 0 1.2rem 1.2rem 1.2rem;
}

/* Task 3: Popup Modal */
.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--nb-overlay);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    z-index: 2000;
}

.popup-overlay.active {
    opacity: 1;
    visibility: visible;
}

.popup-content {
    background-color: var(--nb-panel);
    border: 2px solid #7c3aed;
    border-radius: 12px;
    padding: 2rem;
    width: 90%;
    max-width: 480px;
    position: relative;
    box-shadow: 0 10px 30px rgba(124, 58, 237, 0.4);
    transform: translateY(-20px);
    transition: transform 0.3s ease;
}

.popup-overlay.active .popup-content {
    transform: translateY(0);
}

.popup-close-btn {
    position: absolute;
    top: 15px;
    right: 15px;
    background: none;
    border: none;
    color: var(--nb-cyan);
    font-size: 1.8rem;
    cursor: pointer;
    line-height: 1;
}

/* Task 1: Validation Styles */
.error-text {
    color: var(--nb-danger);
    font-size: 0.85rem;
    margin-top: 0.25rem;
    min-height: 1.2rem;
}

.is-invalid {
    border-color: #ef4444 !important;
}

.is-valid {
    border-color: #10b981 !important;
}

/* =========================================================
   Assignment 5: Advanced JavaScript & DOM
   ========================================================= */

/* Navbar links never wrap onto two lines */
.navbar .nav-link,
.navbar .btn {
    white-space: nowrap;
}

/* ---------- Theme + sound dock (bottom-right corner) ---------- */
.nb-dock {
    position: fixed;
    right: 1rem;
    bottom: 1rem;
    z-index: 1500;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nb-dock-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 2px solid var(--nb-purple);
    background-color: var(--nb-panel);
    color: var(--nb-text);
    font-size: 1.3rem;
    line-height: 1;
    box-shadow: 0 4px 14px rgba(124, 58, 237, 0.35);
    cursor: pointer;
    transition: transform 0.5s ease, background-color 0.3s ease;
}

@media (max-width: 575.98px) {
    .nb-dock-btn {
        width: 40px;
        height: 40px;
        font-size: 1.1rem;
    }
}

.nb-dock-btn:hover,
.nb-dock-btn:focus-visible {
    background-color: var(--nb-purple);
    color: #ffffff;
}

/* ---------- Greeting by time of day (index) ---------- */
.nb-greeting {
    display: inline-block;
    border: 1px solid var(--nb-border);
    border-radius: 999px;
    background-color: rgba(124, 58, 237, 0.12);
    color: var(--nb-text);
    font-weight: 600;
}

/* ---------- Rating stars (games) ---------- */
.nb-stars {
    display: flex;
    gap: 0.35rem;
}

.nb-star {
    background: none;
    border: none;
    font-size: 1.75rem;
    line-height: 1;
    color: var(--nb-star-off);
    cursor: pointer;
    transition: color 0.2s ease, transform 0.2s ease;
}

.nb-star.is-on {
    color: #fbbf24;
    text-shadow: 0 0 10px rgba(251, 191, 36, 0.6);
}

.nb-star:focus-visible {
    outline: 2px solid var(--nb-cyan);
    border-radius: 6px;
}

/* ---------- Tournament explorer cards (games) ---------- */
.nb-tour-card .progress {
    height: 8px;
    background-color: var(--nb-stripe);
}

.nb-tour-card .progress-bar {
    background-color: var(--nb-purple);
    transition: width 0.6s ease;
}

.nb-tour-card.is-full .progress-bar {
    background-color: var(--nb-muted);
}

.nb-prize {
    color: var(--nb-cyan);
    font-weight: 700;
}

/* ---------- Animations (classes are added by JavaScript) ---------- */
@keyframes nb-enter {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes nb-pop {
    0%   { transform: scale(1); }
    50%  { transform: scale(1.45) rotate(-12deg); }
    100% { transform: scale(1); }
}

@keyframes nb-shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-8px); }
    40%, 80% { transform: translateX(8px); }
}

.nb-enter {
    animation: nb-enter 0.45s ease both;
}

.nb-pop {
    animation: nb-pop 0.4s ease;
}

.nb-shake {
    animation: nb-shake 0.4s ease;
}

/* Respect users who turned animations off in their OS */
@media (prefers-reduced-motion: reduce) {
    .nb-enter,
    .nb-pop,
    .nb-shake {
        animation: none;
    }

    .nb-dock-btn {
        transition: none;
    }
}