:root {
    --primary-color: #01c5d3;
    --accent-color: #d4af37;
    --white-color: #ffffff;
    --text-color: #333;
    --background-color: #d6fcff;
    --border-color: #dee2e6;
    --error-color: #dc3545;
}

html {
    scroll-behavior: smooth;
}

body, html {
    margin: 0;
    padding: 0;
    font-family: "IBM Plex Sans Arabic", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    position: relative;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

body.sidebar-open::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4);
    z-index: 999;
    transition: background-color 0.3s;
    cursor: pointer;
}

h1, h2 {
    color: var(--primary-color);
}

h3 {
    color: var(--primary-color);
    margin-top: 2rem;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    z-index: 1001;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background-color: var(--white-color);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 0.03em;
    color: var(--primary-color);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.lang-toggle,
.theme-toggle,
.hamburger-menu {
    font-size: 1.3rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--primary-color);
    border-radius: 999px;
    padding: 0.35rem 0.55rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s, color 0.2s, transform 0.1s;
    z-index: 1002;
}

.lang-toggle:hover,
.theme-toggle:hover,
.hamburger-menu:hover {
    background-color: var(--background-color);
}

.lang-toggle:active,
.theme-toggle:active,
.hamburger-menu:active {
    transform: scale(0.97);
}

.sidebar {
    position: fixed;
    top: 0;
    right: -300px; /* Initially hidden - fully off screen */
    width: 250px;
    height: 100%;
    background-color: var(--white-color);
    box-shadow: -2px 0 5px rgba(0,0,0,0.1);
    padding: 5rem 1.5rem 2rem;
    transition: right 0.3s ease-in-out;
    z-index: 1000;
}

body[dir="rtl"] .sidebar {
    right: auto;
    left: -300px;
    box-shadow: 2px 0 5px rgba(0,0,0,0.1);
    transition: left 0.3s ease-in-out;
}

.sidebar.open {
    right: 0; /* Slides in */
}

body[dir="rtl"] .sidebar.open {
    right: auto;
    left: 0;
}

.sidebar a {
    display: block;
    color: var(--primary-color);
    text-decoration: none;
    padding: 1rem 1.25rem;
    margin-bottom: 0.75rem;
    border-radius: 5px;
    font-weight: 500;
    transition: background-color 0.2s;
}

.sidebar a:hover {
    background-color: var(--background-color);
}

main {
    padding: 5.5rem 1.5rem 2.5rem;
    text-align: center;
    flex-grow: 1;
}

.page {
    display: block;
    max-width: 760px;
    margin: 0 auto;
    animation: fadeInUp 0.4s ease-out;
}

.page.hidden {
    display: none;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.cta-button {
    background-color: var(--primary-color);
    color: var(--white-color);
    border: none;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 5px;
    cursor: pointer;
    margin: 0.5rem auto;
    transition: background-color 0.2s;
    width: 100%;
    margin-top: 1rem;
    display: block;
}

form .cta-button {
    width: auto;
    min-width: 150px;
}

.nav-link.active {
    background-color: var(--background-color);
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.feature-card {
    background-color: var(--white-color);
    border-radius: 10px;
    padding: 1.5rem 1.25rem;
    box-shadow: 0 2px 6px rgba(0,0,0,0.06);
    text-align: left;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.12);
}

.feature-card h2 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0;
}

.feature-card p {
    margin: 0;
}

.feature-card .cta-button {
    align-self: center;
    margin-top: 1rem;
    width: auto;
}

.cta-button:hover, .cta-button:focus {
    background-color: #01a0ab; /* Darker shade of primary color */
    outline: none;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(1, 197, 211, 0.3);
}

.cta-button:active {
    transform: translateY(0);
}

.cta-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.form-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
    box-sizing: border-box; /* Ensures padding doesn't affect width */
    transition: border-color 0.2s, box-shadow 0.2s, transform 0.1s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(1, 197, 211, 0.1);
    transform: translateY(-1px);
}

.form-group input:invalid:not(:placeholder-shown) {
    border-color: var(--error-color);
}

.form-group input:valid:not(:placeholder-shown) {
    border-color: #28a745;
}

.input-hint {
    font-size: 0.85rem;
    color: #6c757d;
    margin-top: 0.25rem;
    display: block;
}

.input-error {
    font-size: 0.85rem;
    color: var(--error-color);
    margin-top: 0.25rem;
    display: block;
}

.results-container {
    margin-top: 2rem;
    padding: 1.5rem;
    background-color: var(--white-color);
    border-radius: 5px;
    border-left: 5px solid var(--primary-color);
    text-align: left;
    display: none; /* Hidden by default */
    animation: fadeIn 0.5s;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    position: relative;
}

.results-container.show {
    display: block;
}

.results-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.result-action-btn {
    background-color: var(--background-color);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    padding: 0.5rem 1rem;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.result-action-btn:hover {
    background-color: var(--primary-color);
    color: var(--white-color);
    transform: translateY(-2px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

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

.results-container h3 {
    margin-top: 0;
    color: var(--primary-color);
}

.results-container p {
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.results-container .error {
    color: var(--error-color);
    font-weight: bold;
}

.accent-text {
    color: var(--accent-color);
    font-weight: bold;
    font-size: 1.2rem;
}

.about-content {
    text-align: left;
    background: var(--white-color);
    padding: 1.5rem;
    border-radius: 5px;
    border: 1px solid var(--border-color);
}

footer {
    text-align: center;
    padding: 1.5rem;
    margin-top: auto;
    background-color: var(--white-color);
    color: #6c757d;
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
}

.global-message {
    max-width: 760px;
    margin: 0 auto 1.5rem;
    padding: 0.75rem 1rem;
    border-radius: 6px;
    font-size: 0.95rem;
    border: 1px solid transparent;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.global-message.hidden {
    display: none;
}

.global-message--error {
    background-color: #ffe3e6;
    color: #842029;
    border-color: #f5c2c7;
}

.global-message--info {
    background-color: #e7f5ff;
    color: #084298;
    border-color: #b6d4fe;
}

.section-helper-text {
    margin-top: 0.25rem;
    margin-bottom: 1.25rem;
    font-size: 0.95rem;
    color: #6c757d;
}

/* Dark mode */
body.dark-mode {
    --background-color: #111827;
    --white-color: #020617;
    --text-color: #e5e7eb;
    --border-color: #1f2937;
}

body.dark-mode .feature-card,
body.dark-mode .results-container,
body.dark-mode .about-content,
body.dark-mode footer,
body.dark-mode .header-container,
body.dark-mode .sidebar {
    box-shadow: none;
}

body.dark-mode .global-message--info {
    background-color: #0f172a;
    color: #e5e7eb;
    border-color: #1e293b;
}

body.dark-mode .global-message--error {
    background-color: #7f1d1d;
    color: #fee2e2;
    border-color: #991b1b;
}


/* Loader Animation */
.loader {
    border: 4px solid var(--background-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 30px;
    height: 30px;
    animation: spin 1s linear infinite;
    margin: 1rem auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

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

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.success-message {
    background-color: #d4edda;
    color: #155724;
    padding: 0.75rem 1rem;
    border-radius: 5px;
    margin-top: 1rem;
    border: 1px solid #c3e6cb;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    animation: slideIn 0.3s ease-out;
}

body.dark-mode .success-message {
    background-color: #1e3a1e;
    color: #90ee90;
    border-color: #2d5a2d;
}


@media (min-width: 769px) {
    .desktop-nav {
        display: flex;
        align-items: center;
    }

    .desktop-nav a {
        color: var(--primary-color);
        text-decoration: none;
        padding: 0.75rem 1rem;
        margin: 0 0.5rem;
        border-radius: 5px;
        font-weight: 500;
        transition: background-color 0.2s;
    }

    .desktop-nav a:hover {
        background-color: var(--background-color);
    }

    .hamburger-menu {
        display: none;
    }

    .sidebar {
        display: none;
    }
}

/* RTL Support */
body[dir="rtl"] {
    direction: rtl;
}

body[dir="rtl"] .header-container {
    flex-direction: row-reverse;
}

body[dir="rtl"] .desktop-nav {
    flex-direction: row-reverse;
}

body[dir="rtl"] .header-actions {
    flex-direction: row-reverse;
}

body[dir="rtl"] .feature-card {
    text-align: right;
}

body[dir="rtl"] .form-group {
    text-align: right;
}

body[dir="rtl"] .results-container {
    text-align: right;
    border-left: none;
    border-right: 5px solid var(--primary-color);
}

body[dir="rtl"] .about-content {
    text-align: right;
}

@media (max-width: 768px) {
    .header-container {
        flex-direction: row;
        justify-content: space-between;
    }
    
    .desktop-nav {
        display: none;
    }

    main {
        padding: 5.5rem 1rem 2rem;
    }

    h1 {
        font-size: 1.8rem;
    }
    
    .cta-button.nav-link {
        width: auto;
    }

    #landing-page .cta-button {
        width: 100%;
        margin-left: 0;
        margin-right: 0;
    }
}