/* --- UNIVERSAL STYLES & VARIABLES --- */
:root {
    --primary-color: #25a85c;
    --primary-hover: #1e8a4c;
    --dark-color: #1a202c;
    --light-gray: #f7fafc;
    --medium-gray: #e2e8f0;
    --text-color: #4a5568;
    --white-color: #ffffff;
    --border-radius: 16px;
    --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.07), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

body {
    font-family: 'Hind Siliguri', sans-serif;
    background: var(--light-gray);
    color: var(--text-color);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

button, a {
    -webkit-tap-highlight-color: transparent; /* iOS tap highlight reset */
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 30px 20px;
}

/* --- HEADER --- */
.app-header {
    text-align: center;
    padding: 40px 20px;
    margin-bottom: 50px;
}

.app-header h1 {
    font-size: 3rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 10px;
}

.app-header p {
    font-size: 1.1rem;
    color: var(--text-color);
}

/* --- APP CARDS & SECTIONS --- */
.app-section, .app-card {
    background: var(--white-color);
    border-radius: var(--border-radius);
    padding: 40px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid var(--medium-gray);
    margin-bottom: 40px;
    -webkit-transition: var(--transition);
    transition: var(--transition);
}

.app-section:hover, .app-card:hover {
    -webkit-transform: translateY(-8px);
    transform: translateY(-8px);
    box-shadow: 0 20px 30px -10px rgba(0, 0, 0, 0.1), 0 10px 15px -5px rgba(0, 0, 0, 0.05);
}

.app-section h2 {
    font-size: 2.2rem;
    color: var(--dark-color);
    font-weight: 600;
}

.app-card h3 {
    font-size: 1.6rem;
    color: var(--dark-color);
    font-weight: 600;
}

.app-section p {
    font-size: 1rem;
    max-width: 600px;
    margin: 15px auto 30px auto;
}

/* --- VIDEO CONTROLS --- */
.show-video-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background-color: #eef2ff;
    color: #4338ca;
    border: none;
    padding: 10px 20px;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    margin-bottom: 30px;
    -webkit-appearance: none;
    appearance: none;
    -webkit-transition: var(--transition);
    transition: var(--transition);
}

.show-video-button:hover {
    background-color: #e0e7ff;
    -webkit-transform: translateY(-2px);
    transform: translateY(-2px);
}

.info-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background-color: #4338ca;
    color: white;
    border-radius: 50%;
    font-style: normal;
    font-weight: bold;
}

.video-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
    height: 0;
    overflow: visible;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: 30px;
    -webkit-transition: all 0.5s ease;
    transition: all 0.5s ease;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: var(--border-radius);
}

.hide-video-button {
    position: absolute;
    top: -15px;
    right: -15px;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background-color: var(--dark-color);
    color: var(--white-color);
    border: 2px solid var(--white-color);
    font-size: 24px;
    font-weight: bold;
    line-height: 32px;
    cursor: pointer;
    z-index: 10;
    box-shadow: 0 5px 10px rgba(0,0,0,0.2);
    -webkit-appearance: none;
    appearance: none;
    -webkit-transition: var(--transition);
    transition: var(--transition);
}

.hide-video-button:hover {
    -webkit-transform: scale(1.1) rotate(90deg);
    transform: scale(1.1) rotate(90deg);
    background-color: #e53e3e;
}

/* --- BUTTONS --- */
.button-group {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.download-button {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 50px;
    text-decoration: none;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    -webkit-appearance: none;
    appearance: none;
    -webkit-transition: var(--transition);
    transition: var(--transition);
}

.download-button:hover {
    -webkit-transform: translateY(-3px) scale(1.03);
    transform: translateY(-3px) scale(1.03);
    box-shadow: 0 7px 20px rgba(0,0,0,0.12);
}

.download-button { background-color: var(--primary-color); color: var(--white-color); }
.download-button:hover { background-color: var(--primary-hover); }
.download-button.ios-button { background-color: var(--dark-color); }
.download-button.ios-button:hover { background-color: #000; }
.download-button.secondary { background: var(--white-color); color: var(--primary-color); border: 1px solid var(--medium-gray); }
.download-button.secondary:hover { background-color: var(--primary-color); color: var(--white-color); border-color: var(--primary-color); }

.button-icon-small {
    width: 20px;
    height: auto;
}

.download-button.ios-button .button-icon-small {
    -webkit-filter: invert(1);
    filter: invert(1);
}

/* --- OTHER APPS & FOOTER --- */
.other-apps-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.app-footer {
    text-align: center;
    margin-top: 60px;
    padding: 20px;
    font-size: 0.9rem;
    color: #a0aec0;
}

/* --- MODALS (Pop-ups) --- */
.modal-backdrop {
    display: none;
    position: fixed;
    z-index: 1000;
    inset: 0;
    background-color: rgba(10, 25, 47, 0.7);
    -webkit-backdrop-filter: blur(5px);
    backdrop-filter: blur(5px);
    align-items: center;
    justify-content: center;
    padding: 15px;
}

.modal-content {
    background-color: var(--white-color);
    padding: 35px;
    border-radius: var(--border-radius);
    width: 100%;
    max-width: 480px;
    text-align: center;
    position: relative;
    -webkit-animation: slideUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    animation: slideUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.modal-close-button {
    background: var(--medium-gray);
    color: var(--text-color);
    position: absolute;
    top: 15px;
    right: 15px;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    font-size: 20px;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    -webkit-appearance: none;
    appearance: none;
    -webkit-transition: var(--transition);
    transition: var(--transition);
}

.modal-close-button:hover {
    background-color: #c9d2de;
    -webkit-transform: rotate(90deg);
    transform: rotate(90deg);
}

.modal-content h3 {
    font-size: 1.6rem;
    color: var(--dark-color);
    margin-bottom: 15px;
}

.modal-content p {
    margin-bottom: 20px; /* Adjusted Margin */
}

.modal-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
    margin-top: 20px; /* Added Margin */
}

.modal-button-visit, .modal-button-ok {
    padding: 12px 25px;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    -webkit-appearance: none;
    appearance: none;
    -webkit-transition: var(--transition);
    transition: var(--transition);
}

.modal-button-visit { background-color: var(--primary-color); color: white; }
.modal-button-visit:hover { background-color: var(--primary-hover); -webkit-transform: translateY(-2px); transform: translateY(-2px); }
.modal-button-ok { background-color: var(--medium-gray); color: var(--dark-color); }
.modal-button-ok:hover { background-color: #c9d2de; -webkit-transform: translateY(-2px); transform: translateY(-2px); }


/* --- INSTALL GUIDE STYLES --- */
.install-guide .install-icon {
    width: 80px;
    height: auto;
    margin-bottom: 15px;
}
.install-guide h3 {
    font-size: 1.8rem;
}
.security-notice {
    font-size: 0.9rem;
    color: var(--text-color);
    margin-bottom: 30px;
}
.install-steps {
    text-align: left;
    margin-bottom: 30px;
}
.step {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}
.step-number {
    flex-shrink: 0;
    width: 30px;
    height: 30px;
    background-color: var(--primary-color);
    color: var(--white-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}
.modal-button-visit.full-width {
    width: 100%;
    padding: 15px;
    font-size: 1.2rem;
}


/* --- FB BROWSER PROMPT --- */
.instruction {
    background-color: #eef2ff;
    padding: 10px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    color: #4338ca;
    margin-top: 15px;
}

.instruction-gif {
    width: 100%;
    max-width: 250px;
    margin: 20px auto 0;
    border-radius: 8px;
    border: 1px solid var(--medium-gray);
}

/* --- UTILITY & RESPONSIVE --- */
.hidden {
    display: none !important;
}

@media (max-width: 768px) {
    .app-header h1 { font-size: 2.5rem; }
    .other-apps-container { grid-template-columns: 1fr; }
    .app-section, .app-card { padding: 40px 25px; }
    .hide-video-button { top: -10px; right: -10px; width: 30px; height: 30px; font-size: 20px; line-height: 28px; }
}