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

html, body {
    height: 100%;
    width: 100%;
    overflow: hidden;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-weight: 400;
    background: linear-gradient(165deg, #9b8aed 0%, #5a4a9a 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 24px;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

.frame {
    width: 100%;
    max-width: 880px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    height: 100%;
    max-height: 800px;
    align-items: center;
}

h1 {
    color: white;
    font-size: clamp(36px, 7vw, 48px);
    font-weight: 520;
    letter-spacing: -0.03em;
    margin: 0 0 24px 0;
    text-transform: uppercase;
    font-family: 'Inter', sans-serif;
    line-height: 1;
    flex-shrink: 0;
    text-align: center;
    width: 100%;
    opacity: 0.95;
    transition: opacity 0.3s, letter-spacing 0.3s;
}

h1:hover {
    opacity: 1;
    letter-spacing: -0.02em;
}

.transcript-card {
    background: rgba(245, 245, 250, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 32px;
    padding: 32px 32px 24px;
    position: relative;
    display: flex;
    flex-direction: column;
    box-shadow: 0 25px 40px -16px rgba(0,0,0,0.4),
                0 0 0 1px rgba(255,255,255,0.1) inset;
    flex: 1;
    min-height: 0;
    width: 100%;
    transition: box-shadow 0.3s;
}

.transcript-card:hover {
    box-shadow: 0 28px 48px -18px rgba(0,0,0,0.5),
                0 0 0 1px rgba(255,255,255,0.15) inset;
}

.copy-wrapper {
    position: absolute;
    top: 20px;
    right: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 10;
}

.copy-btn {
    background: rgba(255,255,255,0.9);
    border: none;
    width: 44px;
    height: 44px;
    padding: 11px;
    cursor: pointer;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.25s cubic-bezier(0.2, 0.9, 0.4, 1);
    color: #2d2d2d;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    backdrop-filter: blur(4px);
}

.copy-btn:hover {
    background: white;
    box-shadow: 0 8px 18px rgba(0,0,0,0.15);
    transform: scale(0.96);
    color: #5a4a9a;
}

.copy-btn:active {
    transform: scale(0.92);
}

.copy-btn svg {
    width: 22px;
    height: 22px;
    stroke: currentColor;
    stroke-width: 1.8;
    fill: none;
    transition: stroke 0.2s;
}

.copy-feedback {
    font-size: 14px;
    color: #1e5e2b;
    font-weight: 500;
    opacity: 0;
    transition: opacity 0.2s ease, transform 0.2s ease;
    background: rgba(255,255,255,0.95);
    padding: 6px 16px;
    border-radius: 100px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
    letter-spacing: -0.01em;
    backdrop-filter: blur(4px);
    pointer-events: none;
    transform: translateX(4px);
}

.copy-feedback.show {
    opacity: 1;
    transform: translateX(0);
}

.drop-zone {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 0;
    margin-top: 20px;
    width: 100%;
    cursor: pointer;
    transition: background 0.25s ease, transform 0.2s ease;
    border-radius: 24px;
    position: relative;
}

.drop-zone.drag-over {
    background: rgba(155, 138, 237, 0.12);
    backdrop-filter: blur(4px);
}

.drop-zone:active {
    transform: scale(0.99);
}

.instruction {
    font-family: 'JetBrains Mono', 'SF Mono', 'Roboto Mono', monospace;
    font-size: clamp(20px, 5vw, 26px);
    font-weight: 450;
    color: #2a2a2a;
    line-height: 1.4;
    text-align: center;
    max-width: 90%;
    margin-bottom: 16px;
    transition: opacity 0.2s;
}

.instruction-small {
    font-family: 'Inter', sans-serif;
    font-size: 15px;
    color: #5a5a5a;
    margin-top: 8px;
    font-weight: 400;
    letter-spacing: 0.2px;
    opacity: 0.8;
    transition: opacity 0.2s;
}

.drop-zone:hover .instruction-small {
    opacity: 1;
}

.attach-btn {
    background: none;
    border: none;
    width: 70px;
    height: 70px;
    font-size: 44px;
    cursor: pointer;
    padding: 0;
    transition: transform 0.3s cubic-bezier(0.2, 0.9, 0.4, 1), opacity 0.2s;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 12px;
    color: #3a3a5a;
    opacity: 0.75;
    transform-origin: center;
}

.attach-btn:hover {
    transform: scale(1.15) rotate(5deg);
    opacity: 1;
}

.attach-btn:active {
    transform: scale(1.05) rotate(2deg);
}

.transcript-area {
    display: none;
    width: 100%;
    height: 100%;
    flex-direction: column;
    animation: fadeIn 0.4s ease;
}

.transcript-area.active {
    display: flex;
}

@keyframes fadeIn {
    0% { opacity: 0; transform: translateY(6px); }
    100% { opacity: 1; transform: translateY(0); }
}

textarea {
    width: 100%;
    background: transparent;
    border: none;
    font-family: 'JetBrains Mono', 'SF Mono', monospace;
    font-size: 15px;
    line-height: 1.75;
    color: #1a1a2c;
    resize: none;
    flex: 1;
    padding: 12px 4px;
    margin: 0;
    outline: none;
    font-weight: 420;
}

textarea::placeholder {
    color: #8a8aa8;
    font-style: italic;
    opacity: 0.7;
}

.footer {
    margin-top: 24px;
    color: rgba(255,255,255,0.85);
    font-size: 15px;
    font-weight: 400;
    letter-spacing: 0.5px;
    text-align: center;
    flex-shrink: 0;
    padding-bottom: 4px;
    width: 100%;
    transition: opacity 0.2s;
}

.footer a {
    color: white;
    text-decoration: none;
    font-weight: 550;
    border-bottom: 1.5px solid rgba(255,255,255,0.25);
    padding-bottom: 2px;
    transition: border-color 0.2s, opacity 0.2s;
}

.footer a:hover {
    border-bottom-color: white;
    opacity: 1;
}

@media (max-width: 600px) {
    body {
        padding: 16px;
    }
    
    h1 {
        margin-bottom: 18px;
    }
    
    .instruction {
        font-size: 20px;
    }
    
    .transcript-card {
        padding: 24px 20px 20px;
    }
    
    .attach-btn {
        width: 64px;
        height: 64px;
        font-size: 42px;
    }
    
    .copy-btn {
        width: 40px;
        height: 40px;
        padding: 10px;
    }
}