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

body {
    font-family: Arial, sans-serif;
    background: #f4f7fb;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 700px;
    margin: auto;
    background: white;
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0,0,0,.08);
}

h1 {
    text-align: center;

    background: linear-gradient(
        135deg,
        #2563eb,
        #60a5fa
    );

    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent
}

p {
    text-align: center;
    color: #555;
}

.accordion {
    margin-top: 15px;
}

.accordion-btn {

    width: 100%;
    border: none;

    background: linear-gradient(
        135deg,
        #2563eb,
        #1d4ed8
    );

    color: white;

    padding: 18px;

    border-radius: 12px;

    cursor: pointer;

    font-size: 18px;

    display: flex;

    justify-content: space-between;

    align-items: center;

    box-shadow:
        0 4px 10px rgba(0,0,0,0.1);

    transition: all .3s ease;
}

.accordion-btn:hover {
    transform: translateY(-2px);

    box-shadow:
        0 8px 18px rgba(0,0,0,0.15);
}

.accordion-content {

    max-height: 0;

    overflow: hidden;

    transition: max-height 0.4s ease;

    background: white;

    border-radius: 12px;

    margin-top: 8px;

    padding: 0 10px;

    box-shadow:
        0 4px 10px rgba(0,0,0,0.08);
}

.accordion-content a {
    text-decoration: none;
}

.accordion-content button {

    width: 100%;

    padding: 12px;

    margin-top: 8px;

    background: #f8fafc;

    border: 1px solid #e2e8f0;

    border-radius: 8px;

    color: #222;
}

.accordion-content button:hover {
    background: #e2e8f0;
}

.stats {
    display: flex;
    gap: 10px;
    margin: 20px 0;
}

.stat-card {
    flex: 1;
    background: white;
    padding: 15px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.837);
}

.stat-card h2 {
    color: #2563eb;
    margin-bottom: 5px;
}

input,
select {
    width: 100%;
    padding: 12px;
    margin-top: 10px;
    border: 1px solid #ccc;
    border-radius: 30px;
    box-sizing: border-box;
}

#result {
    margin-top: 20px;
    text-align: center;
}

.result-card {
    background: #ffffff;
    border-radius: 12px;
    padding: 15px;
    margin-top: 12px;
    box-shadow: 0 2px 10px rgba(15, 12, 12, 0.725);
    text-align: center;
}

.result-title {
    font-size: 14px;
    color: #666;
    margin-bottom: 5px;
}

.result-value {
    font-size: 22px;
    font-weight: bold;
    color: #2563eb;
}

.hero {
    text-align: center;
    margin-bottom: 30px;
}

.tagline {
    color: #666;
    font-size: 16px;
}

#searchInput {
    transition: .3s;
}

#searchInput:focus {

    outline: none;

    border-color: #2563eb;

    box-shadow:
        0 0 0 4px rgba(37,99,235,.15);

}

.calc-btn {
    display: block;

    width: 220px;

    margin: 20px auto;

    padding: 14px 20px;

    border: none;

    border-radius: 30px;

    background: linear-gradient(
        135deg,
        #224ca7ec,
        #214ababc
    );

    color: white;

    font-size: 15px;

    font-weight: bold;

    cursor: pointer;

    transition: all 0.3s ease;

    box-shadow:
        0 4px 12px rgba(7, 10, 17, 0.512);
}

.calc-btn:hover {

    transform: translateY(-2px);

    box-shadow:
        0 8px 18px rgba(37,99,235,0.4);

}

.copy-btn {
    width: 25%;
    margin-top: 12px;
    background: #03441a;
    color: white;
    border: none;
    padding: 14px;
    border-radius: 30px;
    cursor: pointer;
}

.copy-btn:hover {
    opacity: o.9;
}

.share-btn {

    width: 25%;

    margin-top: 10px;

    background: #354566;

    color: white;

    border: none;

    padding: 12px;

    border-radius: 30px;

    cursor: pointer;

    font-weight: bold;

    transition: 0.3s;

}

.share-btn:hover {
    opacity: 0.9;
}

.pdf-btn {

    width: 25%;

    margin-top: 10px;

    background: #331a1a;

    color: white;

    border: none;

    padding: 12px;

    border-radius: 30px;

    cursor: pointer;

    font-weight: bold;

}

.pdf-btn:hover {

    opacity: 0.9;

}

.theme-switch {
    text-align: right;
    margin-bottom: 15px;
}

.dark-mode {
    background: #110d0d;
    color: rgb(255, 253, 253);
}

.dark-mode .container {
    background: #0c0a0a;
    color: rgb(254, 252, 252);
}

.dark-mode input,
.dark-mode select {
    background: #120c0c;
    color: rgb(244, 241, 241);
    border: none;
    
}

.dark-mode .accordion-content {
    background: #2a2a2a;
}

.dark-mode .result-card {
    background: #100d0d;
}

.dark-mode .result-title {
    color: #cccccc;
}

.dark-mode .result-value {
    color: #60a5fa;
}

.dark-mode p,
.dark-mode footer {
    color: #f8fafd;
}

.dark-mode .info-card {
    background: #2a2727;
}

.dark-mode .history-box {

    background: #0c0b0b;

}

.dark-mode .stat-card {
    background: #000000;
}

.toast {
    visibility: hidden;
    position: fixed;
    bottom: 20px;
    right: 20px;
    min-width: 200px;
    background: #333;
    color: white;
    text-align: center;
    font-size: 16px;
    padding: 16px;
    border-radius: 20px;
    opacity: 0;
    transition: 0.3s;
    z-index: 999;
}

#toast.show {
    opacity: 1;
    visibility: visible;
}

footer {
    text-align: center;
    margin-top: 30px;
    color: #777;
}

footer a {

    text-decoration: none;

    color: #2563eb;

    margin: 0 5px;

    font-weight: bold;

}

.policy-heading {

    text-align: center;

    color: #2563eb;

    margin-top: 35px;

    margin-bottom: 15px;

    padding-bottom: 10px;

    border-bottom: 2px solid #e5e7eb;

}

button:focus {

    outline: 3px solid #93c5fd;

    outline-offset: 2px;

}

.history-box {

    background: white;

    padding: 15px;

    border-radius: 12px;

    margin-top: 25px;

    box-shadow:
        0 4px 10px rgba(0,0,0,.08);

}

.history-item {

    padding: 10px;

    border-bottom:
        1px solid #e5e7eb;

    white-space: pre-line;

}

/* Mobile Responsive */

@media (max-width: 768px) {

    .container {
        width: 95%;
        padding: 15px;
    }

    h1 {
        font-size: 28px;
    }

    .accordion-btn {
        font-size: 16px;
        padding: 14px;
    }

    button {
        font-size: 14px;
    }

    input,
    select {
        font-size: 16px;
    }

}