/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: #e0e0e0;
    overflow: hidden;
}

/* App Container */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* Header */
.app-header {
    background: rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 12px 20px;
    backdrop-filter: blur(10px);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo i {
    font-size: 24px;
    color: #ffd700;
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from { text-shadow: 0 0 5px #ffd700, 0 0 10px #ffd700; }
    to { text-shadow: 0 0 10px #ffd700, 0 0 20px #ffd700, 0 0 30px #ffd700; }
}

.logo h1 {
    font-size: 20px;
    font-weight: 600;
    color: #ffffff;
}

.file-info {
    font-size: 14px;
    color: #b0b0b0;
}

/* Main Content */
.main-content {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: 250px;
    background: rgba(0, 0, 0, 0.2);
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    flex-direction: column;
    backdrop-filter: blur(5px);
}

.nav-tabs {
    padding: 20px 0;
}

.nav-tab {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 12px 20px;
    background: none;
    border: none;
    color: #b0b0b0;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.nav-tab:hover {
    background: rgba(255, 255, 255, 0.05);
    color: #ffffff;
}

.nav-tab.active {
    background: rgba(255, 215, 0, 0.1);
    color: #ffd700;
    border-left-color: #ffd700;
}

.nav-tab i {
    width: 16px;
    text-align: center;
}

.quick-actions {
    margin-top: auto;
    padding: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.quick-actions h3 {
    font-size: 14px;
    color: #ffffff;
    margin-bottom: 15px;
    font-weight: 500;
}

.action-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 10px 12px;
    margin-bottom: 8px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    color: #e0e0e0;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.action-btn:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

.action-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Content Area */
.content-area {
    flex: 1;
    overflow: auto;
    padding: 20px;
}

.tab-content {
    display: none;
    height: 100%;
}

.tab-content.active {
    display: block;
}

.tab-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.tab-header h2 {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    color: #ffffff;
    font-weight: 500;
}

.tab-actions {
    display: flex;
    gap: 10px;
}

/* Welcome Screen */
.welcome-screen {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
}

.welcome-icon {
    font-size: 64px;
    color: #ffd700;
    margin-bottom: 20px;
    animation: glow 2s ease-in-out infinite alternate;
}

.welcome-screen h2 {
    font-size: 32px;
    color: #ffffff;
    margin-bottom: 15px;
    font-weight: 300;
}

.welcome-screen p {
    font-size: 16px;
    color: #b0b0b0;
    margin-bottom: 40px;
    line-height: 1.6;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.feature-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 25px 20px;
    text-align: center;
    transition: all 0.3s ease;
}

.feature-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 215, 0, 0.3);
    transform: translateY(-2px);
}

.feature-card i {
    font-size: 32px;
    color: #ffd700;
    margin-bottom: 15px;
}

.feature-card h3 {
    font-size: 16px;
    color: #ffffff;
    margin-bottom: 10px;
    font-weight: 500;
}

.feature-card p {
    font-size: 14px;
    color: #b0b0b0;
    line-height: 1.4;
}

/* Resource Grid */
.resource-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.resource-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    transition: all 0.3s ease;
}

.resource-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
}

.resource-icon {
    width: 50px;
    height: 50px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: #ffffff;
}

.resource-icon.caps { background: linear-gradient(135deg, #ffd700, #ffed4e); }
.resource-icon.food { background: linear-gradient(135deg, #ff6b6b, #ff8e8e); }
.resource-icon.water { background: linear-gradient(135deg, #4ecdc4, #44a08d); }
.resource-icon.power { background: linear-gradient(135deg, #45b7d1, #96c93d); }
.resource-icon.stimpaks { background: linear-gradient(135deg, #f093fb, #f5576c); }
.resource-icon.radaway { background: linear-gradient(135deg, #4facfe, #00f2fe); }
.resource-icon.quantum { background: linear-gradient(135deg, #a8edea, #fed6e3); }
.resource-icon.lunchbox { background: linear-gradient(135deg, #ff9a9e, #fecfef); }
.resource-icon.mrhandy { background: linear-gradient(135deg, #667eea, #764ba2); }
.resource-icon.petcarrier { background: linear-gradient(135deg, #f093fb, #f5576c); }
.resource-icon.lunchbox { background: linear-gradient(135deg, #ff9a9e, #fecfef); }
.resource-icon.mrhandy { background: linear-gradient(135deg, #667eea, #764ba2); }
.resource-icon.petcarrier { background: linear-gradient(135deg, #f093fb, #f5576c); }

.resource-info {
    flex: 1;
}

.resource-info label {
    display: block;
    font-size: 14px;
    color: #ffffff;
    margin-bottom: 8px;
    font-weight: 500;
}

.resource-input {
    width: 100%;
    padding: 10px 12px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 6px;
    color: #ffffff;
    font-size: 16px;
    transition: all 0.3s ease;
}

.resource-input:focus {
    outline: none;
    border-color: #ffd700;
    box-shadow: 0 0 0 2px rgba(255, 215, 0, 0.2);
}

/* Vault Info Grid */
.vault-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.info-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 20px;
}

.info-card label {
    display: block;
    font-size: 14px;
    color: #ffffff;
    margin-bottom: 10px;
    font-weight: 500;
}

.text-input, .number-input, .select-input {
    width: 100%;
    padding: 12px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 6px;
    color: #ffffff;
    font-size: 16px;
    transition: all 0.3s ease;
}

.text-input:focus, .number-input:focus, .select-input:focus {
    outline: none;
    border-color: #ffd700;
    box-shadow: 0 0 0 2px rgba(255, 215, 0, 0.2);
}

/* Dwellers */
.dwellers-container {
    height: calc(100vh - 200px);
    overflow: auto;
}

.dwellers-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.dweller-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 20px;
    transition: all 0.3s ease;
}

.dweller-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
}

.dweller-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.dweller-name {
    font-size: 16px;
    color: #ffffff;
    margin: 0;
}

.dweller-gender {
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: bold;
}

.dweller-gender.male {
    background: rgba(0, 150, 255, 0.2);
    color: #0096ff;
    border: 1px solid #0096ff;
}

.dweller-gender.female {
    background: rgba(255, 100, 150, 0.2);
    color: #ff6496;
    border: 1px solid #ff6496;
}

.pregnant-badge {
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: bold;
    background: rgba(255, 215, 0, 0.2);
    color: #ffd700;
    border: 1px solid #ffd700;
}

.dweller-stats {
    margin-bottom: 15px;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.stat-row span {
    font-size: 14px;
    color: #b0b0b0;
    min-width: 80px;
}

.dweller-input {
    width: 80px;
    padding: 4px 8px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    color: #ffffff;
    font-size: 14px;
}

.dweller-input:focus {
    outline: none;
    border-color: #ffd700;
}

.special-stats {
    margin-bottom: 15px;
}

.special-stats h4 {
    font-size: 14px;
    color: #ffd700;
    margin-bottom: 10px;
    text-align: center;
}

.special-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 8px;
}

.special-stat {
    text-align: center;
}

.special-stat label {
    display: block;
    font-size: 12px;
    color: #ffd700;
    font-weight: bold;
    margin-bottom: 4px;
}

.special-input {
    width: 100%;
    padding: 4px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 215, 0, 0.3);
    border-radius: 4px;
    color: #ffffff;
    font-size: 12px;
    text-align: center;
}

.special-input:focus {
    outline: none;
    border-color: #ffd700;
}

.dweller-actions {
    display: flex;
    gap: 8px;
    justify-content: center;
}

.dweller-actions .secondary-btn {
    padding: 6px 12px;
    font-size: 12px;
}

.placeholder {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    color: #666;
}

.placeholder i {
    font-size: 48px;
    margin-bottom: 20px;
    opacity: 0.5;
}

/* Raw Data */
.raw-data-container {
    height: calc(100vh - 200px);
}

.raw-data-textarea {
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: #e0e0e0;
    font-family: 'Courier New', monospace;
    font-size: 12px;
    padding: 15px;
    resize: none;
    line-height: 1.4;
}

.raw-data-textarea:focus {
    outline: none;
    border-color: #ffd700;
}

/* Buttons */
.primary-btn, .secondary-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.primary-btn {
    background: linear-gradient(135deg, #ffd700, #ffed4e);
    color: #000000;
}

.primary-btn:hover {
    background: linear-gradient(135deg, #ffed4e, #ffd700);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255, 215, 0, 0.3);
}

.secondary-btn {
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.secondary-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
}

.action-bar {
    display: flex;
    justify-content: center;
    gap: 15px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Status Bar */
.status-bar {
    background: rgba(0, 0, 0, 0.3);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 8px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: #b0b0b0;
}

.status-right {
    display: flex;
    gap: 10px;
    align-items: center;
}

.separator {
    opacity: 0.5;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(5px);
}

.loading-overlay.show {
    display: flex;
}

.loading-spinner {
    text-align: center;
    color: #ffffff;
}

.loading-spinner i {
    font-size: 48px;
    color: #ffd700;
    margin-bottom: 20px;
}

.loading-spinner p {
    font-size: 16px;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1001;
}

.toast {
    background: rgba(0, 0, 0, 0.9);
    color: #ffffff;
    padding: 12px 20px;
    border-radius: 8px;
    margin-bottom: 10px;
    border-left: 4px solid #ffd700;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    animation: slideIn 0.3s ease;
    max-width: 300px;
}

.toast.error {
    border-left-color: #ff4757;
}

.toast.success {
    border-left-color: #2ed573;
}

.toast.warning {
    border-left-color: #ffa502;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.5);
}

/* Startup Animation */
.startup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 50%, #16213e 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 1;
    transition: opacity 0.8s ease-out;
}

.startup-overlay.fade-out {
    opacity: 0;
    pointer-events: none;
}

.startup-content {
    text-align: center;
    position: relative;
    z-index: 2;
}

/* Vault Door Animation */
.vault-door {
    margin-bottom: 40px;
    position: relative;
}

.vault-door-outer {
    width: 200px;
    height: 200px;
    border: 8px solid #ffd700;
    border-radius: 50%;
    margin: 0 auto;
    position: relative;
    animation: vaultGlow 2s ease-in-out infinite alternate;
    box-shadow: 
        0 0 20px rgba(255, 215, 0, 0.5),
        inset 0 0 20px rgba(255, 215, 0, 0.2);
}

.vault-door-inner {
    width: 160px;
    height: 160px;
    background: radial-gradient(circle, #2a2a2a 0%, #1a1a1a 100%);
    border: 4px solid #666;
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: vaultRotate 3s linear infinite;
}

.vault-number {
    font-size: 48px;
    font-weight: bold;
    color: #ffd700;
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.8);
    font-family: 'Courier New', monospace;
}

.vault-spokes {
    position: absolute;
    width: 100%;
    height: 100%;
}

.spoke {
    position: absolute;
    width: 4px;
    height: 60px;
    background: linear-gradient(to bottom, #ffd700, #ffed4e);
    left: 50%;
    top: 10px;
    transform-origin: 2px 70px;
    border-radius: 2px;
    box-shadow: 0 0 5px rgba(255, 215, 0, 0.5);
}

.spoke:nth-child(1) { transform: translateX(-50%) rotate(0deg); }
.spoke:nth-child(2) { transform: translateX(-50%) rotate(45deg); }
.spoke:nth-child(3) { transform: translateX(-50%) rotate(90deg); }
.spoke:nth-child(4) { transform: translateX(-50%) rotate(135deg); }
.spoke:nth-child(5) { transform: translateX(-50%) rotate(180deg); }
.spoke:nth-child(6) { transform: translateX(-50%) rotate(225deg); }
.spoke:nth-child(7) { transform: translateX(-50%) rotate(270deg); }
.spoke:nth-child(8) { transform: translateX(-50%) rotate(315deg); }

@keyframes vaultGlow {
    0% { 
        box-shadow: 
            0 0 20px rgba(255, 215, 0, 0.5),
            inset 0 0 20px rgba(255, 215, 0, 0.2);
    }
    100% { 
        box-shadow: 
            0 0 40px rgba(255, 215, 0, 0.8),
            inset 0 0 30px rgba(255, 215, 0, 0.4);
    }
}

@keyframes vaultRotate {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Startup Text */
.startup-text {
    margin-bottom: 60px;
}

.startup-title {
    font-size: 48px;
    font-weight: bold;
    color: #ffd700;
    margin-bottom: 10px;
    text-shadow: 
        0 0 10px rgba(255, 215, 0, 0.8),
        0 0 20px rgba(255, 215, 0, 0.6),
        0 0 30px rgba(255, 215, 0, 0.4);
    animation: titlePulse 1.5s ease-in-out infinite alternate;
    font-family: 'Courier New', monospace;
    letter-spacing: 4px;
}

.startup-subtitle {
    font-size: 24px;
    color: #ffffff;
    margin-bottom: 30px;
    font-weight: 300;
    letter-spacing: 2px;
    opacity: 0;
    animation: fadeInUp 1s ease-out 0.5s forwards;
}

@keyframes titlePulse {
    0% { 
        text-shadow: 
            0 0 10px rgba(255, 215, 0, 0.8),
            0 0 20px rgba(255, 215, 0, 0.6),
            0 0 30px rgba(255, 215, 0, 0.4);
    }
    100% { 
        text-shadow: 
            0 0 20px rgba(255, 215, 0, 1),
            0 0 30px rgba(255, 215, 0, 0.8),
            0 0 40px rgba(255, 215, 0, 0.6);
    }
}

@keyframes fadeInUp {
    0% {
        opacity: 0;
        transform: translateY(20px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Loading Dots */
.loading-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 20px;
}

.loading-dots span {
    width: 8px;
    height: 8px;
    background: #ffd700;
    border-radius: 50%;
    animation: dotPulse 1.5s ease-in-out infinite;
    box-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
}

.loading-dots span:nth-child(1) { animation-delay: 0s; }
.loading-dots span:nth-child(2) { animation-delay: 0.2s; }
.loading-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes dotPulse {
    0%, 80%, 100% {
        transform: scale(0.8);
        opacity: 0.5;
    }
    40% {
        transform: scale(1.2);
        opacity: 1;
    }
}

.version-info {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 20px;
    opacity: 0;
    animation: fadeInUp 1s ease-out 0.8s forwards;
}

.version-badge, .vault-tec-badge {
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-family: 'Courier New', monospace;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.version-badge {
    background: rgba(255, 215, 0, 0.2);
    border: 1px solid #ffd700;
    color: #ffd700;
}

.vault-tec-badge {
    background: rgba(0, 255, 0, 0.1);
    border: 1px solid #00ff00;
    color: #00ff00;
    animation: badgePulse 2s ease-in-out infinite alternate;
}

@keyframes badgePulse {
    0% { 
        box-shadow: 0 0 5px rgba(0, 255, 0, 0.3);
    }
    100% { 
        box-shadow: 0 0 15px rgba(0, 255, 0, 0.6);
    }
}

.startup-status {
    font-size: 16px;
    color: #b0b0b0;
    font-family: 'Courier New', monospace;
    opacity: 0;
    animation: fadeInUp 1s ease-out 1s forwards;
    min-height: 20px;
    transition: all 0.3s ease;
}

/* Progress Bar */
.startup-progress {
    width: 400px;
    margin: 0 auto;
    opacity: 0;
    animation: fadeInUp 1s ease-out 1.5s forwards;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 10px;
    border: 1px solid rgba(255, 215, 0, 0.3);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #ffd700, #ffed4e, #ffd700);
    background-size: 200% 100%;
    border-radius: 4px;
    width: 0%;
    transition: width 0.3s ease;
    animation: progressShimmer 1.5s linear infinite;
    box-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
}

@keyframes progressShimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

.progress-text {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: #888;
    font-family: 'Courier New', monospace;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Radiation Particles */
.radiation-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: #ffd700;
    border-radius: 50%;
    opacity: 0;
    animation: particleFloat 8s linear infinite;
    box-shadow: 0 0 6px rgba(255, 215, 0, 0.8);
}

.particle:nth-child(1) {
    left: 10%;
    animation-delay: 0s;
    animation-duration: 6s;
}

.particle:nth-child(2) {
    left: 20%;
    animation-delay: 1s;
    animation-duration: 8s;
}

.particle:nth-child(3) {
    left: 30%;
    animation-delay: 2s;
    animation-duration: 7s;
}

.particle:nth-child(4) {
    left: 40%;
    animation-delay: 0.5s;
    animation-duration: 9s;
}

.particle:nth-child(5) {
    left: 60%;
    animation-delay: 1.5s;
    animation-duration: 6.5s;
}

.particle:nth-child(6) {
    left: 70%;
    animation-delay: 2.5s;
    animation-duration: 8.5s;
}

.particle:nth-child(7) {
    left: 80%;
    animation-delay: 3s;
    animation-duration: 7.5s;
}

.particle:nth-child(8) {
    left: 90%;
    animation-delay: 3.5s;
    animation-duration: 9.5s;
}

@keyframes particleFloat {
    0% {
        transform: translateY(100vh) translateX(0px);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-100px) translateX(50px);
        opacity: 0;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .sidebar {
        width: 200px;
    }
    
    .resource-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
    
    .tab-header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
    
    .startup-title {
        font-size: 36px;
    }
    
    .startup-subtitle {
        font-size: 18px;
    }
    
    .vault-door-outer {
        width: 150px;
        height: 150px;
    }
    
    .vault-door-inner {
        width: 120px;
        height: 120px;
    }
    
    .vault-number {
        font-size: 36px;
    }
    
    .startup-progress {
        width: 300px;
    }
}