:root {
    --bg-color: #0b0f19;
    --card-bg: #131d31;
    --card-border: #1e293b;
    --card-border-hover: #3b82f6;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent-blue: #3b82f6;
    --accent-glow: rgba(59, 130, 246, 0.2);
    --accent-success: #10b981;
    --font-sans: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: var(--font-sans);
    min-height: 100vh;
    padding: 40px 20px;
    display: flex;
    justify-content: center;
}

.dashboard-container {
    width: 100%;
    max-width: 1200px;
    display: flex;
    flex-direction: column;
    gap: 30px;
}

/* Header Styling */
.dashboard-header {
    background: linear-gradient(135deg, #131d31 0%, #0f172a 100%);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    position: relative;
    overflow: hidden;
}

.dashboard-header::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    pointer-events: none;
}

.header-badge {
    display: inline-block;
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--accent-blue);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: 6px;
    border: 1px solid rgba(59, 130, 246, 0.2);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.dashboard-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 800px;
    margin-bottom: 30px;
    line-height: 1.6;
}

.overview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
}

.overview-card {
    background-color: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--card-border);
    padding: 16px 20px;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.overview-card .label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    text-transform: uppercase;
}

.overview-card .value {
    font-size: 0.95rem;
    font-weight: 600;
}

.overview-card .value.highlight {
    color: #60a5fa;
}

/* Progress Tracker */
.progress-tracker {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 20px 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-muted);
}

.progress-bar-bg {
    width: 100%;
    height: 8px;
    background-color: var(--bg-color);
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid var(--card-border);
}

.progress-bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #3b82f6, #10b981);
    border-radius: 4px;
    transition: width 0.4s ease;
}

/* Phases Grid */
.phases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.phase-card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    position: relative;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.phase-card:hover {
    border-color: var(--card-border-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.phase-card.completed {
    border-color: var(--accent-success);
    background-color: rgba(16, 185, 129, 0.03);
}

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

.phase-number {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent-blue);
    font-weight: 600;
    letter-spacing: 0.05em;
}

.phase-card.completed .phase-number {
    color: var(--accent-success);
}

/* Custom Checkbox */
.checkbox-container {
    display: block;
    position: relative;
    cursor: pointer;
    font-size: 22px;
    user-select: none;
}

.checkbox-container input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.checkmark {
    position: relative;
    top: 0;
    left: 0;
    height: 24px;
    width: 24px;
    background-color: var(--bg-color);
    border: 2px solid var(--card-border);
    border-radius: 6px;
    display: inline-block;
    transition: all 0.2s ease;
}

.checkbox-container:hover input ~ .checkmark {
    border-color: var(--accent-blue);
}

.checkbox-container input:checked ~ .checkmark {
    background-color: var(--accent-success);
    border-color: var(--accent-success);
}

.checkmark:after {
    content: "";
    position: absolute;
    display: none;
}

.checkbox-container input:checked ~ .checkmark:after {
    display: block;
}

.checkbox-container .checkmark:after {
    left: 7px;
    top: 3px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.phase-card h2 {
    font-size: 1.35rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.timeline-tag {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    background-color: var(--bg-color);
    padding: 4px 8px;
    border-radius: 4px;
    width: fit-content;
}

.phase-content {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-top: 4px;
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--text-muted);
}

.section-block strong {
    color: var(--text-main);
}

.roles-container {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.roles-container strong {
    color: var(--text-main);
    font-size: 0.85rem;
}

.role-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 4px;
}

.role-tags span {
    background-color: rgba(59, 130, 246, 0.08);
    color: #93c5fd;
    font-size: 0.75rem;
    padding: 3px 8px;
    border-radius: 4px;
    border: 1px solid rgba(59, 130, 246, 0.15);
}

/* Footer Action */
.dashboard-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 4px;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.secondary-btn {
    background-color: transparent;
    border: 1px solid var(--card-border);
    color: var(--text-muted);
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-family: var(--font-sans);
    font-size: 0.85rem;
    transition: all 0.2s ease;
}

.secondary-btn:hover {
    border-color: var(--text-main);
    color: var(--text-main);
    background-color: rgba(255, 255, 255, 0.02);
}

@media (max-width: 768px) {
    .dashboard-header {
        padding: 24px;
    }
    .dashboard-header h1 {
        font-size: 2rem;
    }
}