/* GLOBAL STYLES & FONT SIZE NORMALIZATION */
:root {
    --primary-color: #007bff;
    --secondary-color: #28a745;
    --dark-color: #2c3e50;
    --text-color: #333;
    --light-bg: #f0f2f5;
    --white-color: #ffffff;

    /* Message specific colors */
    --error-bg: #ffe6e6; /* Light red */
    --error-border: #ff9999; /* Red */
    --error-text: #cc0000; /* Dark red */

    --warning-bg: #fffbe6; /* Light yellow */
    --warning-border: #ffe080; /* Yellow */
    --warning-text: #b38600; /* Dark yellow */

    --success-bg: #e6ffe6; /* Light green */
    --success-border: #99ff99; /* Green */
    --success-text: #008000; /* Dark green */
}

/* Base font size normalization */
html {
    font-size: 16px; /* Normalizing base font size for the entire page */
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--light-bg);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ==================================================================== */
/* NAVBAR STYLES (as before) */
/* ==================================================================== */
.header {
    width: 100%;
    background-image: url('images/gettyimages-2211781214-594x594.jpg'); /* ADJUST THIS PATH */
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: scroll;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: auto;
}

.nav__bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo a img {
    height: 50px;
    width: auto;
    display: block;
    transition: transform 0.3s ease;
}

.logo a img:hover {
    transform: scale(1.05);
}

.nav__logo {
    order: 1;
    margin-left: auto;
}

.nav__links {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 2rem;
    margin: 0;
    padding: 0;
    order: 0;
    transition: transform 0.4s ease-in-out;
}

.nav__links li a {
    text-decoration: none;
    color: var(--white-color);
    font-weight: 600;
    font-size: 1rem;
    padding: 0.5rem 0.8rem;
    border-radius: 5px;
    transition: background-color 0.3s ease, color 0.3s ease, transform 0.2s ease;
    display: inline-block;
}

.nav__links li a:hover {
    background-color: rgba(255, 255, 255, 0.2);
    color: var(--white-color);
    transform: translateY(-2px);
}

.nav__menu__btn {
    display: none;
    font-size: 1.8rem;
    color: var(--white-color);
    cursor: pointer;
    transition: transform 0.3s ease;
}

.nav__menu__btn:hover {
    transform: scale(1.1);
}

/* ==================================================================== */
/* RESPONSIVE NAVBAR (as before) */
/* ==================================================================== */
@media (max-width: 768px) {
    nav {
        flex-direction: column;
        align-items: flex-start;
        padding: 1rem 1.5rem;
    }

    .nav__bar {
        width: 100%;
        justify-content: space-between;
    }

    .nav__logo {
        order: 0;
        margin-left: 0;
    }

    .nav__menu__btn {
        display: block;
        order: 1;
    }

    .nav__links {
        flex-direction: column;
        width: 100%;
        background-color: rgba(0, 0, 0, 0.7);
        padding: 1rem 0;
        gap: 0.5rem;
        border-radius: 8px;
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        z-index: 999;
    }

    .nav__links.open {
        transform: translateY(0%);
        opacity: 1;
        pointer-events: auto;
    }

    .nav__links li {
        width: 100%;
        text-align: center;
    }

    .nav__links li a {
        display: block;
        padding: 0.8rem 0;
        border-radius: 0;
    }
}

/* ==================================================================== */
/* MILEAGE CALCULATOR STYLES */
/* ==================================================================== */

.main-layout {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    background-color: var(--white-color);
    border-radius: 15px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
    padding: 30px;
    max-width: 1000px;
    width: 100%;
    box-sizing: border-box;
    align-items: flex-start;
    animation: fadeInScale 0.8s ease-out;
    margin: 40px auto; /* Margin top/bottom for spacing from navbar/footer */
    flex-grow: 1; /* Allow main content to grow and push footer down if any */
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Panel Styling (Left and Right) */
.left-panel,
.right-panel {
    flex: 1;
    min-width: 380px;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    padding: 15px;
}

.container {
    background-color: var(--light-bg);
    padding: 25px 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    width: 100%;
    max-width: none;
    box-sizing: border-box;
    text-align: center;
}

h1 {
    color: var(--dark-color);
    margin-bottom: 25px;
    font-size: 2em;
    font-weight: 700;
}

form {
    display: flex;
    flex-direction: column;
    gap: 18px;
    margin-bottom: 25px;
}

.input-group {
    text-align: left;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-color);
    font-size: 0.95rem;
}

.input-group input[type="text"],
.input-group input[type="date"],
.input-group input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #d8e2ed;
    border-radius: 8px;
    box-sizing: border-box;
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.input-group input[type="text"]:focus,
.input-group input[type="date"]:focus,
.input-group input[type="number"]:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(0, 123, 255, 0.15);
    outline: none;
}

.radio-group {
    display: flex;
    gap: 20px;
    margin-top: 5px;
}

.radio-group input[type="radio"] {
    margin-right: 5px;
    width: 16px;
    height: 16px;
    transform: translateY(1px);
    accent-color: var(--primary-color);
}

.radio-group label {
    display: inline-flex;
    align-items: center;
    margin-bottom: 0;
    font-weight: normal;
    cursor: pointer;
    font-size: 1rem;
}

.info-text {
    font-size: 0.8rem;
    color: #777;
    margin-top: 5px;
    display: block;
}

button {
    background-color: var(--primary-color);
    color: var(--white-color);
    padding: 14px 25px;
    border: none;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease, box-shadow 0.2s ease;
    margin-top: 15px;
    box-shadow: 0 4px 10px rgba(0, 123, 255, 0.2);
}

button:hover {
    background-color: #0056b3;
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(0, 123, 255, 0.3);
}

button:active {
    transform: translateY(0);
    box-shadow: 0 2px 5px rgba(0, 123, 255, 0.1);
}

/* Results Section Styling */
#results {
    background-color: #e9f7ef;
    border: 1px solid #c3e6cb;
    border-radius: 10px;
    padding: 25px;
    text-align: left;
    box-shadow: inset 0 2px 5px rgba(0, 128, 0, 0.05);
    opacity: 0;
    transform: translateY(20px);
    animation: resultsFadeIn 0.5s ease-out forwards;
    margin-bottom: 20px;
}

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

#results h2 {
    color: var(--secondary-color);
    margin-top: 0;
    margin-bottom: 15px;
    font-size: 1.4em;
}

#results p {
    margin-bottom: 8px;
    line-height: 1.5;
    font-size: 0.95rem;
}

#results p strong {
    color: #444;
}

#results p:last-of-type {
    margin-bottom: 0;
    font-size: 1.1em;
    font-weight: 600;
}

#displayMileage {
    color: var(--primary-color);
    font-size: 1.5em;
    font-weight: bold;
}

/* Generic Feedback Message Styling */
.feedback-message {
    border-radius: 8px;
    padding: 15px;
    margin-top: 20px;
    text-align: center;
    font-weight: 600;
    animation: pulseBorder 1.5s infinite alternate; /* General pulse animation */
}

@keyframes pulseBorder {
    from {
        box-shadow: 0 0 0 0 rgba(0,0,0,0.2);
    }
    to {
        box-shadow: 0 0 0 8px rgba(0,0,0,0);
    }
}

.feedback-message h3 {
    margin-top: 0;
    margin-bottom: 10px;
    font-size: 1.2em;
}

.feedback-message p {
    font-size: 0.9rem;
    margin-bottom: 15px;
    line-height: 1.4;
}

/* Specific Feedback Message Colors */
.error-message {
    background-color: var(--error-bg);
    border: 1px solid var(--error-border);
    color: var(--error-text);
}
.error-message h3 { color: var(--error-text); }

.warning-message {
    background-color: var(--warning-bg);
    border: 1px solid var(--warning-border);
    color: var(--warning-text);
}
.warning-message h3 { color: var(--warning-text); }

.success-message {
    background-color: var(--success-bg);
    border: 1px solid var(--success-border);
    color: var(--success-text);
}
.success-message h3 { color: var(--success-text); }


.service-button-link {
    text-decoration: none;
    color: inherit;
    display: inline-block;
}

.service-button {
    background-color: #ff4d4d; /* Red button for service */
    color: var(--white-color);
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: bold;
    box-shadow: 0 2px 5px rgba(255, 77, 77, 0.3);
    border: none;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.service-button:hover {
    background-color: #cc0000;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(255, 77, 77, 0.4);
}

#resetBtn {
    background-color: #6c757d;
    margin-top: 25px;
}

#resetBtn:hover {
    background-color: #5a6268;
}

.hidden {
    display: none;
}

/* ==================================================================== */
/* RESPONSIVE ADJUSTMENTS FOR CALCULATOR (as before) */
/* ==================================================================== */
@media (max-width: 900px) {
    .main-layout {
        flex-direction: column;
        padding: 20px;
        gap: 20px;
        margin: 20px auto;
    }
    .left-panel, .right-panel {
        min-width: unset;
        width: 100%;
        padding: 0;
    }
    .container, #results {
        padding: 20px 25px;
    }
    h1 {
        font-size: 1.8em;
    }
    #results h2 {
        font-size: 1.2em;
    }
    #displayMileage {
        font-size: 1.4em;
    }
}

@media (max-width: 500px) {
    body {
        padding: 10px;
    }
    html {
        font-size: 15px;
    }
    .main-layout {
        border-radius: 10px;
        padding: 15px;
    }
    .container {
        padding: 15px;
    }
    h1 {
        font-size: 1.6em;
    }
    button {
        padding: 10px 18px;
        font-size: 0.95rem;
    }
    .nav__links {
        padding: 0.5rem 0;
    }
    .nav__links li a {
        font-size: 0.9rem;
    }
}