:root {
    --bg-color: #f4f7fb;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --glass-bg: rgba(255, 255, 255, 0.75);
    --glass-border: rgba(255, 255, 255, 0.5);
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --accent: #8b5cf6;
    --success: #10b981;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Outfit', sans-serif;
}

[data-theme="dark"] {
    --bg-color: #090c15;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --glass-bg: rgba(17, 24, 39, 0.7);
    --glass-border: rgba(255, 255, 255, 0.08);
    --primary: #60a5fa;
    --primary-hover: #3b82f6;
    --accent: #a78bfa;
    --success: #34d399;
    --shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-color);
    color: var(--text-main);
    transition: background-color 0.4s ease, color 0.4s ease;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Subtle Animated Stars Background for Dark Mode */
.stars-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    background-image:
        radial-gradient(1px 1px at 20px 30px, #ffffff, rgba(0,0,0,0)),
        radial-gradient(1px 1px at 40px 70px, #ffffff, rgba(0,0,0,0)),
        radial-gradient(2px 2px at 90px 40px, rgba(255,255,255,0.8), rgba(0,0,0,0)),
        radial-gradient(1px 1px at 160px 120px, rgba(255,255,255,0.6), rgba(0,0,0,0)),
        radial-gradient(1px 1px at 130px 50px, #ffffff, rgba(0,0,0,0)),
        radial-gradient(2px 2px at 70px 160px, rgba(255,255,255,0.7), rgba(0,0,0,0)),
        radial-gradient(1px 1px at 190px 80px, rgba(255,255,255,0.5), rgba(0,0,0,0));
    background-repeat: repeat;
    background-size: 200px 200px;
    opacity: 0;
    transition: opacity 0.5s ease;
}

[data-theme="dark"] .stars-bg {
    opacity: 0.4;
    animation: twinkle 15s linear infinite;
}

@keyframes twinkle {
    0% { transform: translateY(0); }
    100% { transform: translateY(-200px); }
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo ion-icon {
    font-size: 2rem;
    color: var(--accent);
}

h1 {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header-actions {
    display: flex;
    gap: 0.5rem;
}

.icon-btn {
    background: transparent;
    border: none;
    color: var(--text-main);
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    transition: background 0.2s, transform 0.2s;
}

.icon-btn:hover {
    background: var(--glass-bg);
    transform: scale(1.1);
}

[data-theme="dark"] .dark-icon { display: none; }
[data-theme="light"] .light-icon { display: none; }

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem 3rem;
}

.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 1.5rem;
    box-shadow: var(--shadow);
}

.controls-card {
    padding: 1.5rem;
    margin-bottom: 2rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    justify-content: space-between;
    align-items: center;
    animation: slideDown 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.location-status {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1rem;
    color: var(--text-muted);
}

.location-status ion-icon {
    font-size: 1.5rem;
    color: var(--primary);
}

.primary-btn {
    background: linear-gradient(135deg, var(--primary), #2563eb);
    color: white;
    border: none;
    padding: 0.6rem 1.2rem;
    border-radius: 0.75rem;
    font-family: var(--font-body);
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 14px rgba(59, 130, 246, 0.4);
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.6);
}

.primary-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.mode-toggle {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.mode-toggle > label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.toggle-container {
    display: flex;
    background: rgba(0,0,0,0.05);
    border-radius: 1rem;
    padding: 0.25rem;
}

[data-theme="dark"] .toggle-container {
    background: rgba(255,255,255,0.05);
}

.toggle-container input {
    display: none;
}

.toggle-btn {
    padding: 0.5rem 1rem;
    border-radius: 0.75rem;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--text-muted);
    transition: all 0.3s ease;
}

.toggle-container input:checked + .toggle-btn {
    background: var(--primary);
    color: white;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.compass-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent);
    font-weight: 600;
    background: rgba(139, 92, 246, 0.1);
    padding: 0.5rem 1rem;
    border-radius: 1rem;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.section-header h2 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
}

.badge {
    background: var(--primary);
    color: white;
    padding: 0.2rem 0.6rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

/* Loader */
.loader {
    text-align: center;
    padding: 3rem;
    color: var(--text-muted);
}
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--glass-border);
    border-top-color: var(--primary);
    border-radius: 50%;
    margin: 0 auto 1rem;
    animation: spin 1s linear infinite;
}
@keyframes spin { 100% { transform: rotate(360deg); } }

.objects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem 1rem;
    color: var(--text-muted);
}
.empty-state ion-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.object-card {
    padding: 1.5rem;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.3s;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    animation: fadeInUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) both;
}

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

.object-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.obj-name {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
}

.obj-type {
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary);
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.obj-desc {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.obj-stats {
    display: flex;
    gap: 1rem;
    background: rgba(0,0,0,0.03);
    padding: 0.75rem;
    border-radius: 0.75rem;
}
[data-theme="dark"] .obj-stats {
    background: rgba(255,255,255,0.03);
}

.stat {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.stat .label {
    font-size: 0.7rem;
    text-transform: uppercase;
    color: var(--text-muted);
    font-weight: 600;
}

.stat .value {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.1rem;
}

.alt-az-highlight .value {
    color: var(--accent);
}

.obj-tips {
    display: flex;
    gap: 0.5rem;
    align-items: flex-start;
    font-size: 0.85rem;
    color: var(--text-main);
    background: rgba(16, 185, 129, 0.1);
    padding: 0.75rem;
    border-radius: 0.75rem;
    border-left: 3px solid var(--success);
}

.obj-tips ion-icon {
    color: var(--success);
    font-size: 1.2rem;
    flex-shrink: 0;
}

.finding-guide {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    background: rgba(139, 92, 246, 0.1);
    border-left: 3px solid var(--accent);
    padding: 0.75rem;
    border-radius: 0.5rem;
    margin: 0.5rem 0;
}
.finding-guide ion-icon {
    font-size: 1.5rem;
    color: var(--accent);
}
.finding-guide p {
    font-size: 0.9rem;
    color: var(--text-main);
    margin-top: 0.2rem;
}
.finding-guide strong {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.hide-easy-find .finding-guide {
    display: none !important;
}

/* Toggle Switch */
.switch {
  position: relative;
  display: inline-block;
  width: 46px;
  height: 24px;
}
.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}
.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--text-muted);
  transition: .4s;
}
.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: .4s;
}
input:checked + .slider {
  background-color: var(--success);
}
input:focus + .slider {
  box-shadow: 0 0 1px var(--success);
}
input:checked + .slider:before {
  transform: translateX(22px);
}
.slider.round {
  border-radius: 24px;
}
.slider.round:before {
  border-radius: 50%;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.6);
    backdrop-filter: blur(5px);
    overflow: auto;
}
.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s;
}
@keyframes fadeIn {
    from {opacity: 0;}
    to {opacity: 1;}
}
.modal-content {
    background-color: var(--bg-color);
    margin: auto;
    padding: 2rem;
    border-radius: 1.5rem;
    width: 90%;
    max-width: 600px;
    position: relative;
    box-shadow: var(--shadow);
    max-height: 90vh;
    overflow-y: auto;
}
.close-modal {
    color: var(--text-muted);
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}
.close-modal:hover {
    color: var(--text-main);
}
.help-section {
    margin-top: 1.5rem;
}
.help-section h3 {
    color: var(--primary);
    margin-bottom: 0.5rem;
}
.help-section ul {
    margin-left: 1.5rem;
    margin-bottom: 0.5rem;
}
.help-section p {
    line-height: 1.5;
}

/* Error toast */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: #ef4444;
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 1rem;
    font-weight: 600;
    z-index: 2000;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    max-width: 90vw;
    text-align: center;
}
.toast.show {
    transform: translateX(-50%) translateY(0);
}

@media (max-width: 768px) {
    header {
        padding: 1rem 1.25rem;
    }
    .controls-card {
        flex-direction: column;
        align-items: stretch;
    }
    .location-status {
        justify-content: space-between;
    }
}