:root {
    --bg-color: #0f172a;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #38bdf8;
    --accent-glow: rgba(56, 189, 248, 0.3);
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --card-bg: rgba(30, 41, 59, 0.4);
    --success: #4ade80;
    --font-main: 'Outfit', sans-serif;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    overflow-x: hidden;
}

.background-glow {
    position: fixed;
    top: -20%;
    left: -20%;
    width: 140%;
    height: 140%;
    background: radial-gradient(circle at 50% 50%, rgba(56, 189, 248, 0.15), transparent 70%);
    z-index: -1;
    pointer-events: none;
}

.container {
    width: 100%;
    max-width: 600px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

header {
    text-align: center;
    margin-bottom: 2rem;
    animation: fadeInDown 0.8s ease-out;
}

.main-nav {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.nav-link:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.nav-link.active {
    color: var(--accent-color);
    background: rgba(56, 189, 248, 0.1);
    border-color: rgba(56, 189, 248, 0.2);
}

h1 {
    font-weight: 600;
    font-size: 2.5rem;
    letter-spacing: -0.05em;
    background: linear-gradient(135deg, #fff 0%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    color: var(--text-secondary);
    font-weight: 300;
    font-size: 1.1rem;
}

/* Glassmorphism Panel */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

/* Form Styles */
.input-group {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.input-group.vertical {
    flex-direction: column;
}

input,
textarea {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 0.8rem 1rem;
    color: var(--text-primary);
    font-family: var(--font-main);
    font-size: 1rem;
    outline: none;
    transition: all 0.3s ease;
    width: 100%;
}

textarea {
    resize: vertical;
    min-height: 100px;
}

input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px var(--accent-glow);
}

#task-title {
    flex: 2;
}

#task-date {
    flex: 1;
    color: var(--text-secondary);
}

.btn-primary {
    width: 100%;
    background: linear-gradient(135deg, var(--accent-color), #0284c7);
    border: none;
    border-radius: 8px;
    padding: 0.8rem;
    color: white;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--accent-glow);
}

.btn-primary:active {
    transform: translateY(0);
}

/* List Section */
.list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

.badge {
    background: var(--glass-border);
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.task-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    animation: fadeInUp 0.8s ease-out 0.6s backwards;
}

.task-card {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

.task-card:hover {
    background: rgba(30, 41, 59, 0.6);
    transform: translateX(4px);
    border-color: rgba(255, 255, 255, 0.2);
}

.task-info h3 {
    font-weight: 400;
    font-size: 1.1rem;
    margin-bottom: 0.2rem;
}

.task-meta {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    gap: 1rem;
}

.status-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--success);
    margin-right: 0.4rem;
}

/* Note Grid */
.note-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1rem;
    animation: fadeInUp 0.8s ease-out 0.6s backwards;
}

.note-card {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    transition: all 0.3s ease;
    height: 100%;
}

.note-card:hover {
    background: rgba(30, 41, 59, 0.6);
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.2);
}

.note-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent-color);
}

.note-content {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.5;
    flex-grow: 1;
    white-space: pre-wrap;
}

.note-meta {
    font-size: 0.8rem;
    color: rgba(148, 163, 184, 0.6);
    margin-top: 0.5rem;
    text-align: right;
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--text-secondary);
    justify-content: center;
    align-items: center;
    min-height: 100px;
}

/* Animations */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}