:root {
    --primary-color: #ff0000;
    --secondary-color: #282828;
    --text-color: #333333;
    --background-color: #f7f9fc;
    --input-border: #e0e0e0;
    --button-hover: #cc0000;
    --card-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    --safe-area-inset-bottom: env(safe-area-inset-bottom, 0px);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

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

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

html {
    height: -webkit-fill-available;
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    min-height: 100vh;
    min-height: -webkit-fill-available;
    padding-bottom: var(--safe-area-inset-bottom);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    animation: fadeIn 0.8s ease-out;
}

header {
    text-align: center;
    margin-bottom: 2rem;
    padding: 1rem 0;
}

h1 {
    color: var(--primary-color);
    font-size: clamp(1.8rem, 5vw, 3rem);
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.subtitle {
    color: var(--secondary-color);
    font-size: clamp(1rem, 3vw, 1.2rem);
    opacity: 0.9;
}

.input-section {
    max-width: 800px;
    margin: 0 auto 2rem;
    background: white;
    padding: 1.5rem;
    border-radius: 16px;
    box-shadow: var(--card-shadow);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

input[type="text"] {
    padding: 1rem;
    border: 2px solid var(--input-border);
    border-radius: 12px;
    font-size: 16px; /* Prevent zoom on mobile */
    width: 100%;
    transition: all 0.3s ease;
    background: #f8f9fa;
    -webkit-appearance: none;
    appearance: none;
}

input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 0, 0, 0.1);
}

button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    -webkit-appearance: none;
    appearance: none;
    min-height: 48px; /* Minimum touch target size */
}

button:active {
    transform: scale(0.98);
    background-color: var(--button-hover);
}

.error-message {
    background-color: #fff3f3;
    color: #d32f2f;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    text-align: center;
    animation: shake 0.5s ease-in-out;
    border-left: 4px solid #d32f2f;
}

.thumbnail-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
    padding: 0.5rem;
}

.thumbnail-item {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: all 0.3s ease;
    opacity: 0;
    animation: fadeIn 0.5s ease-out forwards;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.thumbnail-item img {
    width: 100%;
    height: auto;
    display: block;
    aspect-ratio: 16/9;
    object-fit: cover;
}

.thumbnail-item .quality {
    padding: 1rem;
    text-align: center;
    font-weight: 500;
    color: var(--secondary-color);
    background: #f8f9fa;
}

.thumbnail-item .download-btn {
    display: block;
    width: 100%;
    padding: 1rem;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    text-align: center;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    margin-top: auto;
    min-height: 48px; /* Minimum touch target size */
    display: flex;
    align-items: center;
    justify-content: center;
}

.thumbnail-item .download-btn:active {
    background-color: var(--button-hover);
    transform: scale(0.98);
}

.instructions {
    background-color: white;
    padding: 1.5rem;
    border-radius: 16px;
    margin: 2rem auto;
    max-width: 800px;
    box-shadow: var(--card-shadow);
}

.instructions h2 {
    margin-bottom: 1.5rem;
    color: var(--secondary-color);
    font-size: clamp(1.4rem, 4vw, 1.8rem);
}

.instructions ol {
    padding-left: 1.5rem;
}

.instructions li {
    margin-bottom: 1rem;
    color: var(--text-color);
    font-size: 1rem;
    padding-left: 0.5rem;
}

footer {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--secondary-color);
    margin-top: 2rem;
    padding-bottom: calc(2rem + var(--safe-area-inset-bottom));
}

/* Mobile Optimizations */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    .input-section {
        padding: 1rem;
        margin: 0 0.5rem 2rem;
    }

    button {
        width: 100%;
        padding: 1rem;
    }

    .thumbnail-container {
        grid-template-columns: 1fr;
        gap: 1rem;
        padding: 0.5rem;
    }

    .instructions {
        margin: 2rem 0.5rem;
        padding: 1rem;
    }

    .thumbnail-item {
        margin: 0 0.5rem;
    }
}

/* PWA Support */
@media (display-mode: standalone) {
    body {
        padding-top: env(safe-area-inset-top);
        padding-bottom: env(safe-area-inset-bottom);
        padding-left: env(safe-area-inset-left);
        padding-right: env(safe-area-inset-right);
    }
}

/* Content Pages Styles */
.content-page {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 1rem;
}

.content-page section {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    margin-bottom: 2rem;
    box-shadow: var(--card-shadow);
}

.content-page h2 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
    font-size: 1.8rem;
}

.content-page h3 {
    color: var(--secondary-color);
    margin: 1.5rem 0 0.5rem;
    font-size: 1.4rem;
}

.content-page p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

.content-page ul, .content-page ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.content-page li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

/* Contact Form Styles */
.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--secondary-color);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 2px solid var(--input-border);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 0, 0, 0.1);
}

.submit-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
}

.submit-btn:hover {
    background-color: var(--button-hover);
}

/* Footer Links */
footer a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

footer a:hover {
    color: var(--button-hover);
    text-decoration: underline;
}

footer p:first-child {
    margin-bottom: 1rem;
}

/* Contact Info Styles */
.contact-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.contact-item {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
}

.contact-item h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.contact-item a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-item a:hover {
    color: var(--primary-color);
}

/* Mobile Optimizations for New Pages */
@media (max-width: 768px) {
    .content-page section {
        padding: 1.5rem;
        margin-bottom: 1.5rem;
    }

    .content-page h2 {
        font-size: 1.5rem;
    }

    .content-page h3 {
        font-size: 1.2rem;
    }

    .contact-details {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .form-group {
        margin-bottom: 1rem;
    }
}