/* Vimeo embed responsive container */
.vimeo-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 */
    height: 0;
    overflow: hidden;
    background: #000;
}
.vimeo-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

/* Progress bar fill animation */
.progress-fill {
    transition: width 0.3s ease;
}

/* Lock icon overlay on lesson items */
.lesson-locked {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Course card hover effect */
.course-card {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.course-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

/* OTP input styling */
.otp-input {
    letter-spacing: 0.5em;
    text-align: center;
    font-size: 1.5rem;
    font-weight: bold;
}

/* Line clamp for multi-line text truncation */
.line-clamp-1 {
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Custom scrollbar for sidebar */
.overflow-y-auto::-webkit-scrollbar {
    width: 4px;
}
.overflow-y-auto::-webkit-scrollbar-track {
    background: transparent;
}
.overflow-y-auto::-webkit-scrollbar-thumb {
    background: #d1d5db;
    border-radius: 2px;
}
.overflow-y-auto::-webkit-scrollbar-thumb:hover {
    background: #9ca3af;
}