/* global reset */
* {
    font-family: 'Google Sans', sans-serif;
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background: linear-gradient(135deg, #FFD2A1, #FFA6DC);
    color: #5A1A1A;
    overflow: auto;
}

.captcha-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    width: 100%;
    padding: 20px;
}

.captcha-box {
    background-color: rgba(255, 255, 255, 0.65);
    border-radius: 30px;
    padding: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    max-width: 500px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    backdrop-filter: blur(10px);
    transition: all 0.4s ease;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeIn 0.5s forwards;
}

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

h2 {
    color: #5A1A1A;
    font-size: 1.6rem;
    font-weight: bold;
    margin-bottom: 20px;
    text-align: center;
}

.captcha-image {
    background: #FFF8F4;
    padding: 20px;
    margin: 20px 0;
    text-align: center;
    font-size: 1.8rem;
    letter-spacing: 0.3rem;
    font-weight: 700;
    color: #5A1A1A;
    border: 1px solid #f1c2c2;
    border-radius: 20px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 6px rgba(0,0,0,0.05);
    width: 100%;
}

.emoji-challenge {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    padding: 20px;
}

.target-arrow {
    font-size: 3rem;
    animation: pulse 2s infinite;
}

.rotate-instruction {
    font-size: 1.2rem;
    color: #5A1A1A;
    text-align: center;
    margin: 10px 0;
}

.emoji-to-rotate {
    font-size: 3rem;
    cursor: pointer;
    transition: transform 0.3s ease;
    padding: 20px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.emoji-to-rotate:hover {
    transform: scale(1.1);
}

.captcha-controls {
    display: flex;
    gap: 15px;
    margin: 20px 0;
    width: 100%;
}

#captchaInput {
    flex: 1;
    padding: 14px;
    border-radius: 20px;
    background-color: #FFF8F4;
    color: #5A1A1A;
    border: 1px solid #f1c2c2;
    font-size: 1rem;
    outline: none;
    box-shadow: 0 1px 2px rgba(0,0,0,0.02);
    transition: all 0.3s ease;
}

#captchaInput:focus {
    border-color: #f28f8f;
    box-shadow: 0 0 0 2px rgba(244,115,115,0.2);
}

#verifyButton {
    padding: 14px 30px;
    background: linear-gradient(90deg, #7C2A2A, #E24D4D);
    color: white;
    border: none;
    border-radius: 20px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

#verifyButton:hover {
    background: linear-gradient(90deg, #5e1e1e, #c43a3a);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

#resultMessage {
    margin-top: 15px;
    padding: 12px;
    border-radius: 15px;
    text-align: center;
    font-weight: 500;
    animation: fadeIn 0.3s ease;
    width: 100%;
}

.success {
    background-color: rgba(16, 185, 129, 0.1);
    color: #10b981;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.error {
    background-color: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.captcha-info {
    margin-top: 15px;
    padding: 12px;
    background-color: rgba(99, 102, 241, 0.1);
    border-radius: 15px;
    color: #5A1A1A;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
}

.captcha-timer {
    margin-top: 15px;
    padding: 10px;
    background-color: rgba(99, 102, 241, 0.1);
    border-radius: 15px;
    color: #5A1A1A;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
}

.captcha-timer.warning {
    background-color: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.7; }
    100% { opacity: 1; }
}

.shake {
    animation: shake 0.5s cubic-bezier(.36,.07,.19,.97) both;
}

@keyframes shake {
    10%, 90% { transform: translate3d(-1px, 0, 0); }
    20%, 80% { transform: translate3d(2px, 0, 0); }
    30%, 50%, 70% { transform: translate3d(-4px, 0, 0); }
    40%, 60% { transform: translate3d(4px, 0, 0); }
}

/* dark mode */
@media (prefers-color-scheme: dark) {
    body {
        background: linear-gradient(135deg, #2C0A0A, #1B0A1F);
        color: #FFEAEA;
    }

    .captcha-box {
        background-color: rgba(255,255,255,0.05);
        box-shadow: 0 8px 20px rgba(255,100,100,0.1);
    }

    h2 {
        color: #FFEAEA;
    }

    .captcha-image {
        background: rgba(255,255,255,0.06);
        color: #FFEAEA;
        border: 1px solid rgba(255,255,255,0.1);
    }

    .rotate-instruction {
        color: #FFEAEA;
    }

    .emoji-to-rotate {
        background: rgba(255, 255, 255, 0.1);
        box-shadow: 0 4px 8px rgba(255, 100, 100, 0.1);
    }

    #captchaInput {
        background-color: rgba(255,255,255,0.06);
        color: #FFEAEA;
        border: 1px solid rgba(255,255,255,0.1);
    }

    #captchaInput::placeholder {
        color: rgba(255,220,220,0.4);
    }

    #verifyButton {
        background: linear-gradient(90deg, #B23352, #FF679A);
    }

    #verifyButton:hover {
        background: linear-gradient(90deg, #8A2642, #E24D80);
    }

    .captcha-info {
        background-color: rgba(255,255,255,0.1);
        color: #FFEAEA;
    }

    .captcha-timer {
        background-color: rgba(255,255,255,0.1);
        color: #FFEAEA;
    }

    .captcha-timer.warning {
        background-color: rgba(239, 68, 68, 0.2);
    }
}

/* responsive */
@media (max-width: 768px) {
    .captcha-box {
        padding: 30px;
        margin: 0 20px;
    }

    .captcha-image {
        font-size: 1.5rem;
        letter-spacing: 0.2rem;
    }

    .target-arrow, .emoji-to-rotate {
        font-size: 2.5rem;
    }

    .rotate-instruction {
        font-size: 1.1rem;
    }

    .captcha-controls {
        flex-direction: column;
    }

    #verifyButton {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .captcha-box {
        padding: 20px;
    }

    h2 {
        font-size: 1.4rem;
    }

    .target-arrow, .emoji-to-rotate {
        font-size: 2rem;
    }

    .rotate-instruction {
        font-size: 1rem;
    }

    .captcha-image {
        font-size: 1.3rem;
        padding: 15px;
    }

    #captchaInput {
        padding: 12px;
    }
}