/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap');

:root {
    --bg-gradient-start: #667eea;
    --bg-gradient-end: #764ba2;
    --card-bg: rgba(255, 255, 255, 0.95);
    --card-shadow: rgba(0, 0, 0, 0.2);
    --text-primary: #333;
    --text-secondary: #4a5568;
    --input-bg: rgba(255, 255, 255, 0.8);
    --input-border: #e2e8f0;
    --input-focus-border: #667eea;
    --btn-gradient-start: #667eea;
    --btn-gradient-end: #764ba2;
    --btn-secondary-start: #f093fb;
    --btn-secondary-end: #f5576c;
    --btn-success-start: #4facfe;
    --btn-success-end: #00f2fe;
    --disclaimer-bg: rgba(255, 193, 7, 0.9);
    --disclaimer-text: #856404;
    --result-bg: #e9ecef;
    --total-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --theme-toggle-bg: rgba(255, 255, 255, 0.2);
    --theme-toggle-color: #fff;
}

[data-theme="dark"] {
    --bg-gradient-start: #2d3748;
    --bg-gradient-end: #1a202c;
    --card-bg: rgba(45, 55, 72, 0.95);
    --card-shadow: rgba(0, 0, 0, 0.4);
    --text-primary: #e2e8f0;
    --text-secondary: #a0aec0;
    --input-bg: rgba(45, 55, 72, 0.8);
    --input-border: #4a5568;
    --input-focus-border: #63b3ed;
    --btn-gradient-start: #3182ce;
    --btn-gradient-end: #2c5282;
    --btn-secondary-start: #ed64a6;
    --btn-secondary-end: #d53f8c;
    --btn-success-start: #38b2ac;
    --btn-success-end: #319795;
    --disclaimer-bg: rgba(237, 137, 54, 0.9);
    --disclaimer-text: #c05621;
    --result-bg: #2d3748;
    --total-bg: linear-gradient(135deg, #3182ce 0%, #2c5282 100%);
    --theme-toggle-bg: rgba(0, 0, 0, 0.2);
    --theme-toggle-color: #e2e8f0;
}

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

body {
    font-family: 'Roboto', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    min-height: 100vh;
    padding: 20px;
    transition: background 0.3s ease;
}

.background {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 20px;
    margin: 0 auto;
    max-width: 800px;
    box-shadow: 0 8px 32px var(--card-shadow);
    transition: box-shadow 0.3s ease;
}

.container {
    max-width: 600px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 30px;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.header-buttons {
    display: flex;
    gap: 10px;
    align-items: center;
}

h1 {
    color: #fff;
    font-size: 2.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    margin: 0;
}

.btn-login {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 25px;
    padding: 10px 20px;
    color: #fff;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-login:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-right: 8px;
    font-size: 1.1em;
}

.icon-standalone {
    margin-right: 0;
}

.icon-lg {
    font-size: 1.4em;
}

.btn-primary .icon,
.btn-secondary .icon,
.btn-success .icon,
.btn-login .icon,
.btn-logout .icon {
    margin-right: 0;
}

.btn-ghost {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: 8px;
    padding: 8px 12px;
    color: #fff;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all 0.3s ease;
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

.user-menu {
    position: relative;
}

.btn-account {
    background: rgba(255, 255, 255, 0.15);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 24px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

.btn-account:hover {
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.25);
}

.user-dropdown {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    background: var(--card-bg);
    border-radius: 12px;
    padding: 16px;
    min-width: 220px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 10;
}

.user-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.user-name {
    font-weight: 600;
    color: var(--text-primary);
}

.user-email {
    font-size: 14px;
    color: var(--text-secondary);
    word-break: break-word;
}

.btn-logout {
    padding: 10px 14px;
    border: none;
    border-radius: 8px;
    background: linear-gradient(135deg, #f5576c 0%, #f093fb 100%);
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    justify-content: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-logout:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 18px rgba(245, 87, 108, 0.35);
}

.theme-toggle {
    background: var(--theme-toggle-bg);
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    color: var(--theme-toggle-color);
    font-size: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    transform: scale(1.1);
    background: rgba(255, 255, 255, 0.3);
}

.disclaimer, .info {
    background: rgba(52, 152, 219, 0.9);
    color: #fff;
    padding: 15px;
    border-radius: 10px;
    font-weight: 500;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-top: 10px;
}

.card {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 10px 30px var(--card-shadow);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px var(--card-shadow);
}

h2 {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
}

input, select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--input-border);
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    background: var(--input-bg);
    color: var(--text-primary);
}

.duration-inputs {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.duration-field {
    display: flex;
    align-items: center;
    gap: 8px;
}

.duration-field input {
    width: 90px;
    text-align: right;
}

.duration-label {
    font-size: 14px;
    color: var(--text-secondary);
    min-width: 32px;
}

input:focus, select:focus {
    outline: none;
    border-color: var(--input-focus-border);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.btn-primary, .btn-secondary, .btn-success {
    background: linear-gradient(135deg, var(--btn-gradient-start) 0%, var(--btn-gradient-end) 100%);
    color: white;
    padding: 15px 20px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    justify-content: center;
    margin-top: 10px;
}

.btn-primary:hover, .btn-secondary:hover, .btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--btn-secondary-start) 0%, var(--btn-secondary-end) 100%);
}

.btn-success {
    background: linear-gradient(135deg, var(--btn-success-start) 0%, var(--btn-success-end) 100%);
}

.result .result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
    border-bottom: 1px solid var(--input-border);
}

.result .result-item:last-child {
    border-bottom: none;
}

.result .label {
    font-weight: 500;
    color: var(--text-secondary);
}

.result .value {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.result .total {
    background: var(--total-bg);
    color: white;
    padding: 20px;
    border-radius: 10px;
    margin-top: 10px;
}

.result .total .label, .result .total .value {
    color: white;
}

.active-insulin .result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.active-insulin .label {
    font-weight: 500;
    color: var(--text-secondary);
}

.active-insulin .value {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--text-primary);
}

.info-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 10px;
}

.history-card {
    margin-top: 20px;
}

.history-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-height: 260px;
    overflow-y: auto;
    padding-right: 6px;
}

.history-item {
    background: rgba(255, 255, 255, 0.08);
    border-radius: 10px;
    padding: 12px 14px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    display: grid;
    gap: 6px;
}

[data-theme="dark"] .history-item {
    background: rgba(0, 0, 0, 0.25);
    border-color: rgba(255, 255, 255, 0.1);
}

.history-main {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 600;
    color: var(--text-primary);
}

.history-meta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.history-empty {
    display: block;
    text-align: center;
    padding: 20px 10px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}
.active-insulin .btn-secondary {
    margin-top: 15px;
    width: 100%;
}

.icr-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.icr-grid .form-group {
    margin-bottom: 0;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.notification {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 10px 30px var(--card-shadow);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    gap: 15px;
    color: var(--text-primary);
    animation: slideIn 0.5s ease-out;
}

.notification .icon {
    font-size: 1.5rem;
}

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

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

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hidden {
    display: none !important;
}

@media (max-width: 768px) {
    .icr-grid {
        grid-template-columns: 1fr;
    }

    h1 {
        font-size: 2rem;
    }

    .card {
        padding: 20px;
    }

    .header-content {
        flex-direction: column;
        gap: 15px;
    }
}

/* Email verification popup styles */
.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.95) 0%, rgba(118, 75, 162, 0.95) 100%);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.popup-content {
    background: var(--card-bg);
    padding: 45px 40px;
    border-radius: 25px;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.3);
    max-width: 500px;
    width: 90%;
    text-align: center;
    animation: popupSlideIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    border: 3px solid rgba(255, 255, 255, 0.2);
}

@keyframes popupSlideIn {
    from {
        opacity: 0;
        transform: translateY(-30px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.popup-content h2 {
    color: var(--text-primary);
    margin-bottom: 25px;
    font-size: 2rem;
    background: linear-gradient(135deg, var(--btn-gradient-start), var(--btn-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.popup-content p {
    color: var(--text-secondary);
    margin-bottom: 15px;
    line-height: 1.7;
    font-size: 1.05rem;
}

.popup-content p strong {
    color: var(--text-primary);
    font-weight: 600;
    background: linear-gradient(135deg, var(--btn-gradient-start), var(--btn-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

#verificationForm {
    display: flex;
    flex-direction: column;
    gap: 25px;
    margin-top: 30px;
}

#verificationCode {
    padding: 25px 20px;
    border: 3px solid transparent;
    border-radius: 15px;
    font-size: 2.2rem;
    text-align: center;
    letter-spacing: 1rem;
    font-weight: 700;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    color: var(--text-primary);
    transition: all 0.3s ease;
    text-transform: uppercase;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.2);
    width: 100%;
    margin: 0 auto;
    position: relative;
    backdrop-filter: blur(10px);
}

#verificationCode:focus {
    outline: none;
    border-color: var(--btn-gradient-start);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.15) 0%, rgba(118, 75, 162, 0.15) 100%);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.4);
    transform: translateY(-3px) scale(1.02);
}

#verificationCode::placeholder {
    letter-spacing: 0.8rem;
    opacity: 0.4;
    font-size: 1.5rem;
}

[data-theme="dark"] #verificationCode {
    background: linear-gradient(135deg, rgba(49, 130, 206, 0.15) 0%, rgba(44, 82, 130, 0.15) 100%);
    box-shadow: 0 4px 15px rgba(49, 130, 206, 0.3);
}

[data-theme="dark"] #verificationCode:focus {
    background: linear-gradient(135deg, rgba(49, 130, 206, 0.25) 0%, rgba(44, 82, 130, 0.25) 100%);
    box-shadow: 0 8px 30px rgba(49, 130, 206, 0.5);
    border-color: var(--btn-gradient-start);
}

.btn-primary, .btn-secondary, .btn-cancel {
    padding: 16px 32px;
    border: none;
    border-radius: 12px;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    margin: 5px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    letter-spacing: 0.5px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--btn-gradient-start) 0%, var(--btn-gradient-end) 100%);
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    border: 2px solid transparent;
}

.btn-primary:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 12px 30px rgba(102, 126, 234, 0.5);
}

.btn-primary:active {
    transform: translateY(-2px) scale(1.02);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--btn-secondary-start) 0%, var(--btn-secondary-end) 100%);
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    border: 2px solid transparent;
}

.btn-secondary:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 12px 30px rgba(240, 147, 251, 0.5);
}

.btn-secondary:active {
    transform: translateY(-2px) scale(1.02);
}

.btn-cancel {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
    border: 2px solid var(--input-border);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.btn-cancel:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: var(--text-primary);
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.15);
}

.btn-primary:disabled, .btn-secondary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.error-message {
    color: #dc3545;
    font-size: 1rem;
    min-height: 28px;
    display: block;
    font-weight: 500;
    padding: 12px 16px;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(220, 53, 69, 0.15) 0%, rgba(220, 53, 69, 0.1) 100%);
    transition: all 0.3s ease;
    border: 2px solid rgba(220, 53, 69, 0.3);
    backdrop-filter: blur(10px);
}

.error-message:empty {
    background: transparent;
    padding: 0;
    border: none;
    min-height: 0;
}

.error-message[style*="color: #28a745"] {
    color: #28a745 !important;
    background: linear-gradient(135deg, rgba(40, 167, 69, 0.15) 0%, rgba(40, 167, 69, 0.1) 100%) !important;
    border-color: rgba(40, 167, 69, 0.3) !important;
}