:root {
    --bg-dark: #1b0c24;         
    --bg-light: #3a1a3e;        
    --card-bg: #27112c;         
    --input-card-bg: #351c3f;   
    --btn-pink: #f8d7e3;        
    --btn-text: #2f0e26;        
    --text-white: #ffffff;      
    --text-muted: #d4b5cd;      
    --accent-blue: #6670b4;     
    --box-bg: #1c0920;          
}

* { box-sizing: border-box; transition: all 0.3s ease; }

body {
    margin: 0;
    background: radial-gradient(circle at 70% 0%, var(--bg-light) 0%, var(--bg-dark) 70%);
    background-attachment: fixed;
    color: var(--text-white);
    font-family: 'Segoe UI', system-ui, sans-serif;
    min-height: 100vh;
}

.navbar {
    display: flex;
    justify-content: space-between;
    padding: 1.2rem 8%;
    background: transparent;
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo { display: flex; align-items: center; gap: 10px; font-size: 26px; color: var(--text-muted); }
.logo b { color: var(--accent-blue); font-weight: 800; }
.logo-icon { color: var(--text-muted); }

.export-btn {
    background: transparent;
    border: 1px solid var(--accent-blue);
    color: var(--accent-blue);
    padding: 8px 20px;
    border-radius: 12px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.export-btn:hover { background: rgba(102, 112, 180, 0.1); transform: translateY(-2px); }

.layout {
    max-width: 1200px;
    margin: 3rem auto;
    display: grid;
    grid-template-columns: 1.6fr 0.8fr;
    gap: 4rem;
    padding: 0 2rem;
}

.hero h1 {
    font-size: 2.2rem;
    margin-bottom: 5px;
    color: var(--text-white);
}

.hero p {
    color: var(--text-muted);
    font-size: 1rem;
    margin-bottom: 30px;
}

.input-card {
    background: var(--input-card-bg);
    padding: 0.5rem;
    border-radius: 18px;
    display: flex;
    gap: 15px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.2);
}

input { 
    background: transparent; 
    border: none; 
    color: var(--text-white); 
    outline: none; 
    padding: 15px 20px; 
    font-size: 15px; 
}
input::placeholder { color: #8a7090; }

input[type="date"]::-webkit-calendar-picker-indicator { 
    filter: invert(0.6) sepia(1) hue-rotate(250deg) saturate(3); 
    cursor: pointer; 
}

#taskInput { flex: 2; border-right: 1px solid rgba(255,255,255,0.05); }

#addBtn {
    background: var(--btn-pink);
    color: var(--btn-text);
    border: none;
    padding: 0 30px;
    border-radius: 14px;
    cursor: pointer;
    font-weight: bold;
    font-size: 14px;
}
#addBtn:hover { background: #fff; transform: scale(1.02); }

.task-item {
    background: var(--card-bg);
    padding: 1.2rem 1.5rem;
    border-radius: 16px;
    display: flex;
    align-items: center;
    gap: 15px;
    margin-top: 1rem;
    border: 1px solid rgba(255,255,255,0.02);
    animation: fadeIn 0.4s ease;
}

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

.delete-icon {
    cursor: pointer;
    color: #ff5252;
    width: 20px;
    transition: 0.2s;
    opacity: 0.7;
}
.delete-icon:hover { opacity: 1; transform: scale(1.1); }

.stats-card {
    background: var(--card-bg);
    padding: 3.5rem 2rem;
    border-radius: 35px;
    text-align: center;
    box-shadow: 0 20px 50px rgba(0,0,0,0.3);
}

.progress-glow {
    width: 130px;
    height: 130px;
    border: 5px solid var(--accent-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 3rem;
    font-size: 2rem;
    font-weight: bold;
    color: var(--text-white);
    box-shadow: 0 0 25px rgba(102, 112, 180, 0.4), inset 0 0 15px rgba(102, 112, 180, 0.2);
}

.stat-box {
    display: flex;
    justify-content: space-between;
    padding: 18px 20px;
    background: var(--box-bg);
    border-radius: 12px;
    margin-bottom: 15px;
    font-size: 14px;
    color: var(--text-muted);
}

.stat-box .val { color: var(--text-white); font-weight: bold; }

.quote {
    margin-top: 2rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.5;
    padding: 0 10px;
}

input[type="checkbox"] {
    appearance: none;
    background-color: transparent;
    margin: 0;
    font: inherit;
    color: currentColor;
    width: 22px;
    height: 22px;
    border: 2px solid var(--accent-blue);
    border-radius: 6px;
    display: grid;
    place-content: center;
    cursor: pointer;
}

input[type="checkbox"]::before {
    content: "";
    width: 12px;
    height: 12px;
    transform: scale(0);
    transition: 120ms transform ease-in-out;
    box-shadow: inset 1em 1em var(--accent-blue);
    border-radius: 3px;
    background-color: var(--accent-blue);
}

input[type="checkbox"]:checked::before { transform: scale(1); }

@media (max-width: 768px) {
    .layout { grid-template-columns: 1fr; gap: 2rem; }
    .input-card { flex-direction: column; padding: 1rem; }
    #taskInput { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.05); }
    #addBtn { padding: 15px; margin-top: 10px; }
}