:root {
    --bg: #FAFAFA;
    --surface: #FFFFFF;
    --border: #EAEAEA;
    --border-hover: #D4D4D4;
    --text-main: #171717;
    --text-muted: #737373;
    --text-light: #A3A3A3;
    --accent: #171717;
    --accent-hover: #000000;
    --success: #16A34A;
    --danger: #DC2626;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.02);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.03);
    --shadow-lg: 0 12px 24px rgba(0,0,0,0.04);
}

* {
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-main);
    min-height: 100vh;
    padding: 16px;
    background-color: var(--bg);
    display: grid;
    place-items: center;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Plus Jakarta Sans', sans-serif;
    color: var(--text-main);
    letter-spacing: -0.02em;
}

.login-shell {
    width: min(520px, 100%);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    overflow: hidden;
    animation: riseIn 600ms cubic-bezier(0.16, 1, 0.3, 1);
}

.login-form-container {
    padding: 40px;
}

.brand-logo {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 24px;
}

.section-title h2 {
    font-size: 1.75rem;
    margin-bottom: 6px;
    text-align: center;
    font-weight: 600;
}

.section-title p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 32px;
    text-align: center;
}

/* Form Controls and Labels */
.form-floating {
    position: relative;
    margin-bottom: 1.25rem;
    display: flex;
    flex-direction: column;
}

.form-floating label {
    position: static;
    transform: none !important;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.4rem;
    padding: 0;
    opacity: 1 !important;
    background: none;
    height: auto;
    font-weight: 500;
}

.form-control {
    border: 1px solid var(--border);
    border-radius: 8px;
    height: 48px;
    font-size: 0.9rem;
    color: var(--text-main);
    background-color: var(--surface);
    transition: all 0.2s ease;
    padding: 0 14px !important;
    display: block;
    line-height: normal !important;
    box-shadow: var(--shadow-sm);
}

.form-control:focus {
    border-color: var(--text-light);
    box-shadow: 0 0 0 3px rgba(23, 23, 23, 0.05);
}

.form-floating input.form-control {
    padding-top: 0 !important;
    padding-bottom: 0 !important;
}

.form-control::placeholder {
    color: var(--text-light);
    opacity: 0.5;
}

/* Password Toggle Fix */
.password-wrapper {
    position: relative;
    width: 100%;
}

.password-toggle {
    position: absolute;
    right: 12px;
    top: 0;
    height: 48px;
    display: flex;
    align-items: center;
    border: 0;
    background: transparent;
    color: var(--text-light);
    z-index: 3;
    padding: 0 8px;
    transition: color 0.2s ease;
}

.password-toggle:hover {
    color: var(--text-main);
}

/* Phone Input Fix */
.phone-input-container {
    position: relative;
    height: 48px;
    width: 100%;
    display: flex;
    align-items: center;
}

.phone-prefix {
    position: absolute; 
    left: 44px; 
    color: var(--text-main); 
    font-weight: 500; 
    z-index: 2;
    pointer-events: none;
    font-size: 0.9rem;
}

.country-flag {
    position: absolute;
    left: 14px;
    display: flex;
    align-items: center;
    z-index: 2;
    pointer-events: none;
    height: 100%;
}

.country-flag::after {
    content: "";
    width: 22px;
    height: 16px;
    background-image: url('../images/tz.webp');
    background-size: cover;
    background-repeat: no-repeat;
    border-radius: 2px;
    box-shadow: var(--shadow-sm);
}

#phoneNumber {
    padding-left: 84px !important;
}

/* General Layout helpers */
.form-check-label,
.extra-link {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.form-check-input {
    border-color: var(--border-hover);
    cursor: pointer;
}

.form-check-input:checked {
    background-color: var(--text-main);
    border-color: var(--text-main);
}

.extra-link {
    color: var(--text-main);
    text-decoration: none;
    font-weight: 600;
}

.extra-link:hover {
    text-decoration: underline;
}

.btn-login,
.btn-register {
    border: 1px solid var(--text-main);
    border-radius: 8px;
    padding: 12px 20px;
    font-weight: 500;
    font-size: 0.95rem;
    background: var(--text-main);
    color: var(--surface);
    transition: all 0.2s ease;
    box-shadow: var(--shadow-sm);
    font-family: inherit;
    margin-top: 10px;
}

.btn-login:hover,
.btn-register:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
    color: var(--surface);
}

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

.alert {
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--surface);
    padding: 12px 16px;
    margin-bottom: 24px;
    font-size: 0.85rem;
    box-shadow: var(--shadow-sm);
}

.alert-danger {
    color: var(--danger);
    border-color: #FECACA;
    background: #FEF2F2;
}

.alert-success {
    color: var(--success);
    border-color: #BBF7D0;
    background: #F0FDF4;
}

.loading-spinner {
    display: none;
    width: 16px;
    height: 16px;
    margin-left: 8px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    vertical-align: middle;
}

.btn-login.loading .loading-spinner,
.btn-register.loading .loading-spinner {
    display: inline-block;
}

.foot-note {
    text-align: center;
    margin-top: 24px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.foot-note a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 600;
    margin-left: 4px;
}

.foot-note a:hover {
    text-decoration: underline;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes riseIn {
    from {
        transform: translateY(12px) scale(0.99);
        opacity: 0;
    }
    to {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
}

@media (max-width: 560px) {
    body {
        padding: 16px;
    }

    .login-form-container {
        padding: 32px 24px;
    }

    .section-title h2 {
        font-size: 1.5rem;
    }
}