* {
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
body {
    background-color: #0b141a;
    color: #e9edef;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}
.app-container {
    width: 100%;
    max-width: 420px;
    height: 100vh;
    background-color: #111b21;
    display: flex;
    flex-direction: column;
    padding: 30px 24px;
    position: relative;
}
@media (min-width: 425px) {
    .app-container {
        height: 85vh;
        border-radius: 12px;
        box-shadow: 0 8px 24px rgba(0,0,0,0.4);
    }
}
.header {
    text-align: center;
    margin-top: 40px;
    margin-bottom: 40px;
}
.header h1 {
    color: #00a884;
    font-size: 32px;
    margin: 0 0 8px 0;
    font-weight: 700;
}
.header p {
    color: #8696a0;
    font-size: 14px;
    margin: 0;
}
.form-group {
    margin-bottom: 16px;
}
input {
    width: 100%;
    padding: 14px 16px;
    background-color: #202c33;
    border: 1px solid #2a3942;
    border-radius: 8px;
    color: #d1d7db;
    font-size: 16px;
    outline: none;
}
input:focus {
    border-color: #00a884;
}
input::placeholder {
    color: #667781;
}
.action-btn {
    width: 100%;
    padding: 14px;
    background-color: #00a884;
    color: #111b21;
    border: none;
    border-radius: 24px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    margin-top: 20px;
}
.toggle-container {
    text-align: center;
    margin-top: auto;
    margin-bottom: 20px;
    font-size: 14px;
    color: #8696a0;
}
.toggle-link {
    color: #00a884;
    cursor: pointer;
    font-weight: 600;
    margin-left: 5px;
}
.error-container {
    background-color: rgba(234, 91, 91, 0.1);
    border-left: 3px solid #ea5b5b;
    color: #f18c8c;
    padding: 10px;
    border-radius: 4px;
    font-size: 14px;
    margin-bottom: 20px;
    display: none;
    text-align: center;
}
.hidden { display: none !important; }