/* Reset CSS */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #0077b6, #023e8a); /* Same as chat page */
    overflow: hidden;
}

/* Floating Dots Background Animation with Waveform - Final Version */
.background-animation {
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    height: 300px;
    transform: translateY(-50%);
    z-index: 0;
    overflow: hidden;
}

.background-animation i {
    position: absolute;
    background: rgba(72, 202, 228, 0.4); /* #48cae4 with transparency */
    border-radius: 50%;
    animation: float linear infinite;
    opacity: 0;
    right: -100px;
    top: var(--y-offset);
    --wave-amplitude: 50px;
}

/* Waveform animation keyframes */
@keyframes float {
    0% {
        transform: translate(0, 0);
        opacity: 0;
    }
    10% {
        opacity: 0.8;
    }
    25% {
        transform: translate(-25vw, calc(var(--wave-amplitude) * -1));
    }
    50% {
        transform: translate(-50vw, var(--wave-amplitude));
    }
    75% {
        transform: translate(-75vw, calc(var(--wave-amplitude) * -1));
    }
    90% {
        opacity: 0.8;
    }
    100% {
        transform: translate(calc(-100vw - 100px), var(--wave-amplitude));
        opacity: 0;
    }
}

/* Final dots properties - larger size (10px-18px) and centered */
.background-animation i:nth-child(1) { width: 10px; height: 10px; --y-offset: 75px; --wave-amplitude: 40px; animation-duration: 18s; animation-delay: 0s; }
.background-animation i:nth-child(2) { width: 12px; height: 12px; --y-offset: 125px; --wave-amplitude: 60px; animation-duration: 22s; animation-delay: 3s; }
.background-animation i:nth-child(3) { width: 8px; height: 8px; --y-offset: 175px; --wave-amplitude: 30px; animation-duration: 20s; animation-delay: 6s; }
.background-animation i:nth-child(4) { width: 14px; height: 14px; --y-offset: 75px; --wave-amplitude: 50px; animation-duration: 25s; animation-delay: 1s; }
.background-animation i:nth-child(5) { width: 16px; height: 16px; --y-offset: 125px; --wave-amplitude: 70px; animation-duration: 15s; animation-delay: 8s; }
.background-animation i:nth-child(6) { width: 10px; height: 10px; --y-offset: 175px; --wave-amplitude: 20px; animation-duration: 19s; animation-delay: 4s; }
.background-animation i:nth-child(7) { width: 12px; height: 12px; --y-offset: 75px; --wave-amplitude: 80px; animation-duration: 21s; animation-delay: 7s; }
.background-animation i:nth-child(8) { width: 8px; height: 8px; --y-offset: 125px; --wave-amplitude: 35px; animation-duration: 24s; animation-delay: 2s; }
.background-animation i:nth-child(9) { width: 14px; height: 14px; --y-offset: 175px; --wave-amplitude: 55px; animation-duration: 16s; animation-delay: 9s; }
.background-animation i:nth-child(10) { width: 16px; height: 16px; --y-offset: 75px; --wave-amplitude: 25px; animation-duration: 23s; animation-delay: 5s; }
.background-animation i:nth-child(11) { width: 10px; height: 10px; --y-offset: 125px; --wave-amplitude: 65px; animation-duration: 18s; animation-delay: 3s; }
.background-animation i:nth-child(12) { width: 12px; height: 12px; --y-offset: 175px; --wave-amplitude: 45px; animation-duration: 22s; animation-delay: 6s; }
.background-animation i:nth-child(13) { width: 8px; height: 8px; --y-offset: 75px; --wave-amplitude: 75px; animation-duration: 26s; animation-delay: 1s; }
.background-animation i:nth-child(14) { width: 14px; height: 14px; --y-offset: 125px; --wave-amplitude: 30px; animation-duration: 20s; animation-delay: 8s; }
.background-animation i:nth-child(15) { width: 16px; height: 16px; --y-offset: 175px; --wave-amplitude: 60px; animation-duration: 17s; animation-delay: 4s; }
.background-animation i:nth-child(16) { width: 10px; height: 10px; --y-offset: 75px; --wave-amplitude: 40px; animation-duration: 19s; animation-delay: 7s; }
.background-animation i:nth-child(17) { width: 12px; height: 12px; --y-offset: 125px; --wave-amplitude: 70px; animation-duration: 24s; animation-delay: 2s; }
.background-animation i:nth-child(18) { width: 8px; height: 8px; --y-offset: 175px; --wave-amplitude: 50px; animation-duration: 21s; animation-delay: 5s; }
.background-animation i:nth-child(19) { width: 14px; height: 14px; --y-offset: 75px; --wave-amplitude: 35px; animation-duration: 16s; animation-delay: 9s; }
.background-animation i:nth-child(20) { width: 16px; height: 16px; --y-offset: 125px; --wave-amplitude: 55px; animation-duration: 23s; animation-delay: 3s; }

/* Login container styling */
.login-container {
    background: rgba(255, 255, 255, 0.9); /* Slightly transparent white */
    backdrop-filter: blur(20px); /* Frosted glass effect */
    -webkit-backdrop-filter: blur(20px);
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    padding: 40px;
    width: 90%;
    max-width: 450px;
    transform: perspective(1000px) rotateY(5deg);
    transition: transform 0.5s ease;
    position: relative;
    z-index: 1;
    overflow: hidden;
}

.login-container:hover {
    transform: perspective(1000px) rotateY(0deg);
}

.logo-placeholder {
    height: 80px;
    margin-bottom: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #6a11cb;
    font-size: 24px;
    font-weight: bold;
    border: 2px dashed #6a11cb;
    border-radius: 10px;
}

/* Form toggle buttons */
.form-toggle {
    display: flex;
    margin-bottom: 20px;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.toggle-btn {
    flex: 1;
    padding: 12px 0;
    border: none;
    background: #f0f0f0;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.toggle-btn.active {
    background: #0096c7; /* New blue from palette */
    color: white;
}

.toggle-btn:not(.active):hover {
    background: #e0e0e0;
}

/* Input group styling */
.input-group {
    margin-bottom: 25px;
}

.input-group input {
    width: 100%;
    padding: 15px;
    margin-bottom: 15px;
    border: 1px solid #ddd;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.8);
    transition: all 0.3s ease;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05) inset;
    height: 50px;
    box-sizing: border-box;
}

.input-group input:focus,
.phone-input-wrapper:极focus-within {
    border-color: #48cae4;
    box-shadow: 0 0 0 3px rgba(72, 202, 228, 0.2);
    transform: translateY(-2px);
    outline: none;
}

/* Phone input styling */
.phone-input-wrapper {
    display: flex;
    align-items: center;
    border: 1px solid #ddd;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.8);
    margin-bottom: 15px;
    transition: all 0.3s ease;
    height: 50px;
    box-sizing: border-box;
    position: relative;
}

.phone-prefix-display {
    padding: 15px;
    color: #888;
    font-weight: bold;
    border-right: 1px solid #ddd;
    background-color: #f8f9fa;
    height: 100%;
    display: flex;
    align-items: center;
    border-radius: 10px 0 0 10px;
}

.phone-input {
    border: none !important;
    margin-bottom: 0 !important;
    box-shadow: none !important;
    flex-grow: 1;
    background: transparent !important;
    height: 100%;
    padding: 0 15px;
    border-radius: 0 10px 10px 0;
}

.phone-input:focus {
    box-shadow: none !important;
    transform: none !important;
    outline: none;
}

/* Login button styling */
.login-btn {
    width: 100%;
    padding: 15px;
    background: #0096c7; /* New blue from palette */
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 150, 199, 0.4);
    position: relative;
    overflow: hidden;
}

.login-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(37, 117, 252, 0.6);
}

.login-btn:active {
    transform: translateY(0);
}

/* Links styling */
.links {
    display: flex;
    justify-content: space-between;
    margin-top: 20px;
}

.links a {
    color: #48cae4; /* New light blue from palette */
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.links a:hover {
    color: #03045e; /* Darkest blue from palette */
    text-decoration: underline;
}

/* Responsive design */
@media (max-width: 480px) {
    .login-container {
        padding: 25px;
        width: 95%;
    }
    
    .form-toggle {
        flex-direction: column;
    }
}