:root {
    --bg-color: #0f172a;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --card-bg: rgba(30, 41, 59, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
    --success: #10b981;
    --danger: #ef4444;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    background-image: 
        radial-gradient(at 0% 0%, rgba(59, 130, 246, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(16, 185, 129, 0.1) 0px, transparent 50%);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 2rem;
}

/* Lock Screen Overlay */
.lock-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(15px);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
}

.lock-screen.show {
    display: flex;
}

.lock-box {
    width: 90%;
    max-width: 400px;
    text-align: center;
    padding: 3rem 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.app-container {
    max-width: 1200px;
    margin: 0 auto;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.header-title {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header-icon {
    font-size: 2rem;
    color: var(--accent-color);
}

.header-search {
    flex: 1;
    max-width: 400px;
    position: relative;
    margin: 0 1rem;
}

.header-search i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.header-search input {
    width: 100%;
    padding: 0.8rem 1rem 0.8rem 2.5rem;
    border-radius: 20px;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

h1 {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.glass-panel {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

/* Forms */
.add-account-card {
    margin-bottom: 3rem;
}

#addAccountForm {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    align-items: end;
}

.input-group {
    position: relative;
    display: flex;
    flex-direction: column;
}

.input-group i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

input {
    width: 100%;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.8rem 1rem 0.8rem 2.5rem;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

/* Buttons */
.btn {
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-family: inherit;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background-color: var(--accent-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.15);
}

.btn-icon {
    padding: 0.5rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s;
}

.btn-icon:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.btn-danger:hover {
    color: var(--danger);
    background: rgba(239, 68, 68, 0.1);
}

/* Accounts Grid */
.accounts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.account-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.account-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    border-color: rgba(255, 255, 255, 0.2);
}

.account-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.account-email {
    font-weight: 600;
    font-size: 1.1rem;
    word-break: break-all;
}

.account-note {
    font-size: 0.8rem;
    background: rgba(59, 130, 246, 0.2);
    color: var(--accent-color);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    display: inline-block;
    margin-top: 0.3rem;
}

.account-details {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.detail-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(0, 0, 0, 0.2);
    padding: 0.5rem 0.8rem;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.2s;
}

.detail-row:hover {
    background: rgba(255, 255, 255, 0.05);
}

.detail-row .actions {
    display: flex;
    gap: 0.8rem;
}

.detail-row i {
    opacity: 0.5;
    transition: opacity 0.2s, color 0.2s;
}

.detail-row:hover i {
    opacity: 1;
}

.detail-row i:hover {
    color: var(--accent-color);
}

.code-display {
    text-align: center;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    padding: 1rem;
    border-radius: 8px;
    margin-top: 0.5rem;
    cursor: pointer;
    transition: all 0.2s;
}

.code-display:hover {
    background: rgba(16, 185, 129, 0.15);
}

.totp-code {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    color: var(--success);
    font-family: monospace;
}

.totp-timer {
    display: block;
    height: 3px;
    background: var(--success);
    margin-top: 0.5rem;
    border-radius: 3px;
    width: 100%;
    transition: width 1s linear;
}

/* Change 2FA QR Upload */
.qr-upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 2rem 1rem;
    text-align: center;
    cursor: pointer;
    background: rgba(15, 23, 42, 0.4);
    transition: all 0.2s;
}

.qr-upload-area:hover {
    border-color: var(--accent-color);
    background: rgba(15, 23, 42, 0.8);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal.show {
    display: flex;
    opacity: 1;
}

.modal-content {
    width: 90%;
    max-width: 600px;
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.modal.show .modal-content {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
}

.close-btn:hover {
    color: var(--text-primary);
}

.modal-desc {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

code {
    background: rgba(0, 0, 0, 0.3);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: monospace;
}

textarea {
    width: 100%;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    color: var(--text-primary);
    font-family: monospace;
    resize: vertical;
    margin-bottom: 1.5rem;
}

textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--success);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    font-weight: 500;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    z-index: 1001;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

/* Warning Color */
.toast.warning {
    background: #f59e0b;
}

/* Responsive Design for Mobile */
@media (max-width: 768px) {
    body {
        padding: 1rem;
    }
    
    h1 {
        font-size: 1.3rem;
    }
    
    header {
        flex-direction: column;
        gap: 1rem;
    }
    
    .header-search {
        max-width: 100%;
        margin: 0;
    }
    
    #addAccountForm {
        grid-template-columns: 1fr;
    }
    
    .accounts-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        width: 95%;
        padding: 1.5rem;
    }
    
    .toast {
        right: 1rem;
        left: 1rem;
        bottom: 1rem;
        text-align: center;
    }
    
    .totp-code {
        font-size: 1.6rem;
    }
}