:root {
    --bg-dark: #080b11;
    --card-bg: rgba(15, 22, 36, 0.7);
    --card-border: rgba(255, 255, 255, 0.06);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-primary: #6366f1;
    --accent-secondary: #a855f7;
    --accent-glow: rgba(99, 102, 241, 0.3);
    --danger: #ef4444;
    --success: #10b981;
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 40px 20px;
    overflow-x: hidden;
}

/* Background Glows */
.bg-circles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.circle {
    position: absolute;
    filter: blur(120px);
    border-radius: 50%;
    opacity: 0.4;
}

.circle-1 {
    top: -10%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: var(--accent-primary);
}

.circle-2 {
    bottom: -10%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: var(--accent-secondary);
}

/* App Container */
.app-container {
    width: 100%;
    max-width: 600px;
    z-index: 1;
}

header {
    text-align: center;
    margin-bottom: 40px;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 8px;
}

.logo i {
    font-size: 2rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo h1 {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

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

/* Form */
.task-form-container {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 30px;
    margin-bottom: 40px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

.input-group {
    margin-bottom: 16px;
}

input[type="text"], textarea {
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 14px 16px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
}

input[type="text"]:focus, textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px var(--accent-glow);
}

textarea {
    height: 100px;
    resize: none;
}

.btn-add {
    width: 100%;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border: none;
    border-radius: 12px;
    padding: 14px;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-add:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.4);
}

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

/* Tasks Section */
.tasks-section {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.section-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

.task-count {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 4px 12px;
    border-radius: 100px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-primary);
}

/* Task Item */
.tasks-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.task-item {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: transform 0.3s ease, border-color 0.3s ease;
    animation: slideIn 0.4s ease-out forwards;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.task-item:hover {
    border-color: rgba(255, 255, 255, 0.1);
    transform: translateX(5px);
}

.task-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.task-content p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 300;
}

.btn-delete {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-delete:hover {
    background: var(--danger);
    color: white;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 40px 0;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 16px;
    opacity: 0.3;
}