/* Theme Variables */
:root {
    /* Light Theme Colors */
    --light-background-primary: #f8fafc;
    --light-background-card: #ffffff;
    --light-accent-blue: #4f7df9;
    --light-text-primary: #1e293b;
    --light-text-secondary: #64748b;
    --light-input-background: #f1f5f9;
    --light-input-text: #334155;
    --light-input-placeholder: #94a3b8;
    --light-input-border: #cbd5e1;
    --light-accent-gold: #eab308;
    --light-button-gradient: linear-gradient(to right, #4361ee, #3a86ff);
    --light-card-border: #e2e8f0;
    --light-card-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    --light-header-bar: linear-gradient(to right, #4361ee, #3a86ff);
    --light-error-bg: rgba(239, 68, 68, 0.1);
    --light-error-border: #ef4444;
    --light-error-text: #dc2626;
    --light-divider-color: #e2e8f0;

    /* Dark Theme Colors - Premium UI */
    --dark-background-primary: #0f1624;
    --dark-background-card: #1a2236;
    --dark-accent-blue: #4f7df9;
    --dark-text-primary: #f3f4f6;
    --dark-text-secondary: #9ca3af;
    --dark-input-background: #232d3f;
    --dark-input-text: #e5e7eb;
    --dark-input-placeholder: #9ca3af;
    --dark-input-border: #374151;
    --dark-accent-gold: #eab308;
    --dark-button-gradient: linear-gradient(to right, #4361ee, #3a86ff);
    --dark-card-border: #2e3b52;
    --dark-card-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    --dark-header-bar: linear-gradient(to right, #4361ee, #3a86ff);
    --dark-error-bg: rgba(239, 68, 68, 0.15);
    --dark-error-border: #ef4444;
    --dark-error-text: #f87171;
    --dark-divider-color: #2e3b52;
}

/* Apply theme based on data-theme attribute */
html[data-theme="light"] {
    --background-primary: var(--light-background-primary);
    --background-card: var(--light-background-card);
    --accent-blue: var(--light-accent-blue);
    --text-primary: var(--light-text-primary);
    --text-secondary: var(--light-text-secondary);
    --input-background: var(--light-input-background);
    --input-text: var(--light-input-text);
    --input-placeholder: var(--light-input-placeholder);
    --input-border: var(--light-input-border);
    --accent-gold: var(--light-accent-gold);
    --button-gradient: var(--light-button-gradient);
    --card-border: var(--light-card-border);
    --card-shadow: var(--light-card-shadow);
    --header-bar: var(--light-header-bar);
    --error-bg: var(--light-error-bg);
    --error-border: var(--light-error-border);
    --error-text: var(--light-error-text);
    --divider-color: var(--light-divider-color);
}

html[data-theme="dark"] {
    --background-primary: var(--dark-background-primary);
    --background-card: var(--dark-background-card);
    --accent-blue: var(--dark-accent-blue);
    --text-primary: var(--dark-text-primary);
    --text-secondary: var(--dark-text-secondary);
    --input-background: var(--dark-input-background);
    --input-text: var(--dark-input-text);
    --input-placeholder: var(--dark-input-placeholder);
    --input-border: var(--dark-input-border);
    --accent-gold: var(--dark-accent-gold);
    --button-gradient: var(--dark-button-gradient);
    --card-border: var(--dark-card-border);
    --card-shadow: var(--dark-card-shadow);
    --header-bar: var(--dark-header-bar);
    --error-bg: var(--dark-error-bg);
    --error-border: var(--dark-error-border);
    --error-text: var(--dark-error-text);
    --divider-color: var(--dark-divider-color);
}

/* Base Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--background-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: background-color 0.3s ease;
}

/* Login Container */
.login-container {
    width: 100%;
    max-width: 420px;
    background-color: var(--background-card);
    border-radius: 16px;
    box-shadow: var(--card-shadow);
    overflow: hidden;
    position: relative;
    padding: 40px 25px;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--card-border);
}

/* Top Accent Bar */
.top-accent {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--header-bar);
}

/* Theme Toggle Button */
.theme-toggle {
    position: absolute;
    top: 15px;
    right: 15px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--input-background);
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    color: var(--text-secondary);
    border: 1px solid var(--input-border);
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    background-color: var(--accent-blue);
    color: white;
}

html[data-theme="dark"] .icon-sun {
    display: block;
}

html[data-theme="dark"] .icon-moon {
    display: none;
}

html[data-theme="light"] .icon-sun {
    display: none;
}

html[data-theme="light"] .icon-moon {
    display: block;
}

/* Logo & Branding */
.logo-container {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.company-logo {
    max-width: 180px;
    height: auto;
    border-radius: 50%;
}

.brand {
    text-align: center;
}

.brand h1 {
    font-size: 2rem;
    font-weight: 700;
    color: #4582ff;
    letter-spacing: -0.02em;
    margin-bottom: 5px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    text-align: center;
    margin-bottom: 25px;
}

/* Google Sign-In Button */
.btn-google {
    display: flex;
    width: 100%;
    padding: 12px 16px;
    background-color: transparent;
    color: #fff;
    text-align: center;
    border-radius: 8px;
    text-decoration: none;
    font-size: 0.95rem;
    margin-bottom: 10px;
    justify-content: center;
    align-items: center;
    gap: 10px;
    font-weight: 500;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.btn-google:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.g-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background-color: white;
    color: #444;
    border-radius: 50%;
    font-size: 14px;
    font-weight: bold;
}

/* Alternative Sign In Text */
.alt-signin {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin: 10px 0;
}

/* Form Elements */
form {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 15px;
}

.input-group {
    position: relative;
    width: 100%;
}

.input-icon {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--input-placeholder);
    width: 20px;
    height: 20px;
}

input {
    width: 100%;
    padding: 16px 16px 16px 45px;
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 8px;
    color: white;
    font-size: 1rem;
    transition: all 0.3s ease;
}

input:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 1px var(--accent-blue);
}

input::placeholder {
    color: var(--input-placeholder);
}

button[type="submit"] {
    padding: 15px;
    background: #4582ff;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 5px;
}

button[type="submit"]:hover {
    box-shadow: 0 5px 15px rgba(63, 131, 248, 0.4);
    transform: translateY(-2px);
}

.forgot-password {
    color: var(--accent-blue);
    text-decoration: none;
    font-size: 0.9rem;
    text-align: center;
    display: block;
    margin-top: 15px;
    transition: color 0.3s ease;
}

.forgot-password:hover {
    color: #6692ff;
    text-decoration: underline;
}

/* Security Badge */
.security-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 30px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.85rem;
}

.security-badge svg {
    color: #ffc107;
    width: 16px;
    height: 16px;
}

/* Error Message */
.error-message {
    display: flex;
    align-items: center;
    gap: 10px;
    background-color: var(--error-bg);
    border-left: 3px solid var(--error-border);
    color: var(--error-text);
    padding: 12px;
    margin-bottom: 20px;
    border-radius: 4px;
    font-size: 0.875rem;
}

.error-message svg {
    min-width: 16px;
    color: var(--error-text);
}

/* Animation for Button */
@keyframes shine {
    to {
        background-position: 200% center;
    }
}

/* Responsive Adjustments */
@media (max-width: 480px) {
    .login-container {
        max-width: 90%;
        margin: 20px;
        padding: 30px 20px;
    }

    .brand h1 {
        font-size: 1.8rem;
    }

    button[type="submit"],
    .btn-google {
        padding: 12px;
    }
}

@media (max-width: 350px) {
    .login-container {
        padding: 25px 15px;
    }

    input {
        padding: 14px 14px 14px 40px;
    }

    .input-icon {
        left: 12px;
    }
}