:root {
    --gemini-bg: #131314;
    --gemini-text: #ffffff;
    --gemini-dim: #b4b4b4;
    --gemini-blue: #4285f4;
    --gemini-input: #1e1f20;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Google Sans', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--gemini-bg);
    color: var(--gemini-text);
}

@keyframes gradientShift { 
    0% { background-position: 0% 50%; } 
    50% { background-position: 100% 50%; } 
    100% { background-position: 0% 50%; } 
}

/* Login Page Styles */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100dvh;
    overflow: hidden;
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 48px 40px;
    text-align: center;
}

.login-branding {
    margin-bottom: 32px;
}

.gemini-logo-large {
    font-size: 48px;
    background: linear-gradient(45deg, #4285f4, #9b72cb, #d96570, #4285f4);
    background-size: 300% 300%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientShift 3s ease infinite;
    margin-bottom: 8px;
}

.gemini-ai-text {
    font-size: 32px;
    font-weight: 500;
    color: var(--gemini-text);
}

.gemini-ai-text span {
    background: linear-gradient(45deg, #4285f4, #9b72cb, #d96570);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.login-container h1 {
    font-size: 24px;
    font-weight: 400;
    margin-bottom: 32px;
    color: var(--gemini-text);
}

.input-group {
    margin-bottom: 16px;
}

.input-group input {
    width: 100%;
    padding: 14px 16px;
    background: var(--gemini-input);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 12px;
    color: var(--gemini-text);
    font-size: 15px;
    outline: none;
    transition: border-color 0.3s;
}

.input-group input:focus {
    border-color: var(--gemini-blue);
}

.input-group input::placeholder {
    color: var(--gemini-dim);
}

.btn-primary {
    width: 100%;
    padding: 14px;
    background: var(--gemini-blue);
    color: #fff;
    border: none;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    margin-top: 8px;
    transition: opacity 0.2s;
}

.btn-primary:hover {
    opacity: 0.9;
}

.error {
    color: #ff4d4d;
    font-size: 13px;
    margin-bottom: 16px;
}